The concentration of the acid is 0.016 M
What is neutralization reaction?A neutralization reaction is a chemical reaction in which an acid and a base react to form a salt and water. The reaction occurs when the hydrogen ions (H+) from the acid react with the hydroxide ions (OH-) from the base to form water (H2O). The salt that forms depends on the specific acid and base that are reacted.
Using;
CAVA/CBVB = NA/NB
CA = concentration of acid
CB = concentration of base
VA = volume of acid
VB = Volume of base
Then;
CAVANB = CBVBNA
CA = CBVBNA/VANB
CA = 0.0193 M * 25.6 mL * 1/15 mL * 2
CA = 0.016 M
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Why are volumetric flasks, instead of beakers or graduated cylinders, used to prepare standard solutions from solids? Volumetric flasks are cheaper than beakers and graduated cylinders. There are volumetric flasks with various sizes for us to choose from. Beakers and graduated cylinders are not large enough to prepare a large volume of standard solution Volumetric flasks are calibrated to contain a precise volume of liquids at a particular temperature, Volumetric flasks are easier to handle than beakers or graduated cylinders.
The reason why volumetric flasks are used instead of beakers or graduated cylinders is that Volumetric flasks are calibrated to contain a precise volume of liquid at a particular temperature, making them more accurate than graduated cylinders.
Beakers and graduated cylinders are not as accurate or precise and are more suitable for approximate measurements. Additionally, volumetric flasks are designed to minimize evaporation and reduce errors due to meniscus formation, which can affect the accuracy of the final concentration of the standard solution. Therefore, volumetric flasks are the preferred choice for preparing standard solutions from solids.
Accuracy: Volumetric flasks are designed to deliver a precise volume of liquid at a specific temperature, making them more accurate than graduated cylinders.
Precision: Volumetric flasks are designed to minimize evaporation and errors due to meniscus formation, resulting in higher precision than graduated cylinders.
Consistency: Volumetric flasks deliver a consistent volume of liquid every time, while the volume of liquid delivered by graduated cylinders can vary depending on the user's technique.
Ease of use: Volumetric flasks are easy to use, with a simple and straightforward procedure for filling and measuring the liquid. Graduated cylinders require more technique and practice to use accurately.
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why can't the carbon dioxide cycle easily correct for the increasing amounts of carbon dioxide introduced into our atmosphere by industrialization
The carbon dioxide cycle refers to the natural process of exchanging carbon dioxide between the atmosphere, oceans, and land. This cycle can help to regulate the levels of carbon dioxide in the atmosphere over long periods of time.
However, it is not able to easily correct for the increasing amounts of carbon dioxide that have been introduced into the atmosphere by industrialization for several reasons: Carbon dioxide emissions from human activities are much larger than natural carbon dioxide sources: Human activities, such as burning fossil fuels, deforestation, and industrial processes, have greatly increased the amount of carbon dioxide in the atmosphere.
The natural carbon sinks are not capable of absorbing all the excess carbon dioxide: The carbon dioxide cycle relies on natural carbon sinks such as forests and oceans to absorb carbon dioxide from the atmosphere. However, these natural carbon sinks have limits to their capacity and are becoming saturated with excess carbon dioxide.
The rate of carbon dioxide emissions is much faster than the rate at which natural carbon sinks can absorb carbon dioxide: The natural carbon sinks have a limited capacity to absorb carbon dioxide, and their absorption rate is much slower than the rate at which carbon dioxide is being emitted by human activities.
This means that the excess carbon dioxide remains in the atmosphere for longer periods of time, contributing to the buildup of carbon dioxide in the atmosphere.
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Calculate the freezing point of a solution containing 1.25 g of benzene (78 g/mol) in 100 g of chloroform.
∆T = Km Kfp chloroform = 4.68 oC/m Freezing point chloroform = -63.5 oC
The freezing point of a solution is -63.575 °C
The freezing point depression of a solution can be calculated by using the equation:
∆T = Km • Kfp
Where ∆T is the freezing point depression of the solution, Km is the molar concentration of the solute and Kfp is the freezing point depression constant for the solvent.
For this problem, the molar concentration of the solute (benzene) is
[tex]\frac{ 1.25 g}{78 g/mol }\\\\= 0.0161 mol/kg.[/tex]
The freezing point depression constant for chloroform is 4.68 °C/m.
Therefore, the freezing point depression of the solution is:
∆T = 0.0161 mol/kg • 4.68 °C/m = 0.075 °C
The freezing point of the solution is then calculated by subtracting the freezing point depression from the freezing point of the pure solvent:
Freezing point of solution = -63.5 °C - 0.075 °C = -63.575 °C
Therefore , freezing point of a solution is -63.575 °C
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Looking at the cladogram, Hector determines that the tuatara and lizard both descended from common ancestor #2. Naiomi determines that the tuatara and lizard both descended from common ancestor #3.
Who is correct? Why?
Read Passage
Question Image
A
Both Hector and Naiomi are correct. The tuatara and lizard both descended from common ancestor #2 and common ancestor #3.
B
Hector is correct, because both the tuatara and lizard evolved from common ancestor #2 based on the cladogram.
C
Naiomi is correct, because both the tuatara and lizard evolved from common ancestor #3 based on the
Answer: A
Explanation: Both Hector and Naiomi are correct because the sequence is Lizard → snake→ tuatara→ crocodile.
so, according to this sequence both tuatara and lizard descended from common ancestor.
How much Glucose should be consumed if we want to produce 2.3 moles of Carbon Dioxide (CO₂)?
In order to produce 2.3 moles of carbon dioxide (CO₂), you would need to consume 7.9 moles of glucose. This is because in the chemical equation for respiration, glucose reacts with oxygen to form carbon dioxide and water: C6H12O6 + 6O2 → 6CO2 + 6H2O.
Balance the chemical reaction
using an atom inventory.
What is the coefficient for
potassium?
[?]K+ [ ]Br₂
[]KBr
The balanced chemical equation of the reaction between potassium and bromine to form potassium bromide is given as:
2 K + Br₂ ---> 2 KBr.The coefficient of potassium is 2.
What is a balanced chemical equation?A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.
The law of conservation of mass states that when a chemical reaction takes place, the mass of the reactants and products should be equal. As a result, during the chemical process, the number of atoms in each element remains constant. The chemical equation must be balanced as a result.
The balanced chemical equation of the given reaction is as follows:
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Rank the following aqueous solutions from lowest predicted boiling point to highest: In the case of solutions containing aqueous ions, assume there is no ion clustering in the solution: 167 mCH_OH0.530 mNazSO4 0.475 mKaPO40.907 mKBr0.722 mNHANO3
From highest to lowest, the following aqueous solutions are: 0.475 m K3PO4 (highest), 0.907 m KBR, 1.67 m CH3OH, 0.530 m NA2SO4, and 0.722 m NH4NO3 (lowest).
The boiling point of a salt solution rises as the boiling point does. A Rhizob provides the majority of eubacterial antibiotics. As can be seen from the concentration figures, methanol has the lowest concentration. Methanol will have the lowest boiling point as a result. The solution of 0.10 M SrCl2 in 300.0 mL contains the most ions as a result. Therefore, 1.0 MNa2SO4 has the maximum boiling point value. The most highly vaporized substance is 1-chloropentane. Because of its boiling point's "propto 1/("branching")," tert-butyl alcohol has the lowest boiling point. Surface area decreases with increasing branching.
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how does it become less dense if one were to ride a hot air balloon up into the atmosphere in concentration of gases,
A gas's molecules move more quickly and collide with one another and the container walls more frequently as its temperature rises. The gas's density drops as a result of this increase in volume.
The density of the air within the balloon reduces as it heats up and expands. Pressure remained stable despite ongoing changes in volume and temperature. In contrast, a hot air balloon has a density that is initially equal to the air around it. . As the air inside it warms up, its density falls until it has a buoyant force acting on it that can lift not only the balloon but also the basket and passengers. Hot air balloons ascend into the air because the warmer, less dense air within the balloon has a lower density than the air outside (cooler air). The system is subject to a buoyant force because the balloon and basket move a fluid that is heavier than the balloon and basket.
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if you started with a 125g sample of u-235, how much of the sample would be remaining after 3 half-lives and how many years would have passed?
The half-life of uranium-235 (U-235) is 704 million years. Therefore, after three half-lives, the amount of U-235 remaining will be 15.624g.
(1/2)^3 = 1/8
So, only 1/8th of the initial amount of U-235 will remain. We can calculate the amount of U-235 remaining as:
125 g × (1/8) = 15.625 g
So, 15.625 g of U-235 will remain after 3 half-lives.
The time it takes for three half-lives to pass can be calculated as:
3 × 704 million years = 2.112 billion years
Therefore, 2.112 billion years will have passed after 3 half-lives.
Note that the calculation assumes that the decay of U-235 follows first-order kinetics and that the decay products do not interfere with the decay process. Additionally, the calculation neglects any effects due to the changing abundance of U-235 in natural uranium over time, as U-235 is a radioactive isotope that is continuously decaying in the Earth's crust.
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which answer best describes why does ice float in liquid water?
A liquid is made up of small vibrating matter particles called atoms. Ice float in liquid water is best described by the term density.
What is liquid?A liquid is a virtually incompressible fluid that adapts to the geometry of its container while maintaining a (near) constant volume regardless of pressure. As such, it is among the four fundamental matter states (the others being solid, gas, and plasma) and the only one having a set volume but no fixed form.
A liquid is made up of small vibrating matter particles called atoms that are bound together by intermolecular connections. Ice float in liquid water is best described by the term density.
Therefore, ice float in liquid water is best described by the term density.
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Select the effect of the size of a sample on the melting point (mp) measurement. Select the effect of the rate of heating on the melting point measurement. Select the effect that the degree of chemical purity of a substance has on the melting point measurement.
The size of a sample can affect the melting point measurement by either increasing or decreasing the observed melting point.
A larger sample size can lead to a broader melting range due to uneven heating, while a smaller sample size can result in a higher melting point due to surface effects.
The rate of heating can also affect the melting point measurement. A slow heating rate can result in a lower melting point due to partial decomposition, while a rapid heating rate can lead to a higher melting point due to kinetic factors.
The degree of chemical purity of a substance can affect the melting point measurement by increasing the observed melting point and narrowing the melting range. Impurities can lower the melting point and broaden the melting range due to eutectic effects.
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How does the amount of rain
affect the number of worms on
the sidewalk?
On the surface, they have a lot more mobility.
Earthworms must remain moist, which is an issue.
Usually, if they were above ground, they would start to dehydrate. However, when it rains, the surface is sufficiently damp for worms to survive and maintain their moisture levels.
Answer:
worms like to bury tunnels underground, so when they hear the 'pit pat' of the rain, they try to go closer to the rain so that they can make better tunnels faster.
My opinion is that all animals have feelings, depending on the size of their brain. You might think this is hilarious but, I think worms know that rain can help them move faster to make tunnels, but since they have such a small brain, they think they should make tunnels above ground where water is soaking.
Explanation:
Have you ever seen a worm in puddles? Well, its because they think its easier to build in water. Its hilarious I know.
I hope this helped!
why is carbon so special ?
Carbon is special because it is the basis of all known life on Earth. It is the key element in organic compounds, which are the building blocks of life.
Why carbon is special?Carbon has the ability to form a vast number of chemical compounds, more than any other element, with almost ten million compounds described to date. This is due to its unique ability to form strong bonds with other elements, including other carbon atoms. This property allows carbon to form long chains and rings, which are the basis of many organic compounds.
Additionally, carbon is a key component of many important biological molecules, such as DNA, proteins, and carbohydrates. In short, carbon is special because it is essential to life as we know it.
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a block of titanium has nv vacancies at 300 k. what happens to the number of vacancies as the temperature increases to 600 k? group of answer choices
The quantity of vacancies grows together with a solid material's temperature. This is due to the fact that at higher temperatures, the material's atoms have greater kinetic energy and are therefore more prone to move around and leave voids behind.
The vacant regions in the crystal lattice of solid materials where atoms are absent from their predicted places are known as vacancies. These vacancies may develop for a number of reasons, including thermal vibrations, lattice contaminants, and external forces on the material. The characteristics of the material may change as a result of the existence of vacancies, such as the electrical conductivity, mechanical strength, or thermal conductivity. Designing and optimising materials for particular uses, such as in electrical devices, aerospace engineering, or nuclear power plants, requires an understanding of the behaviour of vacancies. In materials science and engineering, vacancies are thus a crucial notion.
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A tank of compressed CO2 has a pressure of 851 psi and a volume of 0. 150 L. What is the pressure in atmospheres, when the final volume is 2. 84 L?
This issue, which links the pressure, volume, and temperature of a gas, can be resolved using the combined gas law: [tex](P1 x V1) / T1 = (P2 x V2) / T2[/tex]. As a result, when the final volume is 2.84 L, the pressure in atmospheres is 3.07 atm.
The force applied per unit area is referred to as pressure, which is a key term in both engineering and physics. In other terms, pressure can be thought of as the amount of force that is applied to a specific location. It can be measured in a number of different units, such as atmospheres (atm), pascals (Pa), and pounds per square inch (psi). Many natural phenomena and technical applications, including fluid dynamics, weather systems, aviation, and hydraulics, depend heavily on pressure. Physics, chemistry, material science, and mechanical engineering are just a few of the science and engineering disciplines that depend on an understanding of pressure.
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in the equation for the formation of nylon 6,6 in the background, the non-polymer product is water (not depicted in the equation). what is the non-polymer product produced in the reaction you used in lab?
Answering a lab report format with questions and sections, including nylon synthesis, yield, and uses.
(1) The name of the nylon produced in this experiment is Nylon 6.
(2) The non-polymer product produced in the reaction used in lab is acetic acid.
(3) Two uses of nylon are:
Nylon is used in the production of clothing and accessories such as stockings, swimsuits, and parachutes.It is also used in the manufacturing of carpets, seat belts, and tire cords.Results & Discussion:
The aim of the experiment was to synthesize nylon and examine its properties.The experimental approach involved the reaction between hexamethylenediamine and adipoyl chloride to form Nylon 6, followed by washing and drying the resulting nylon. This was done to understand the properties of the nylon synthesized.The aspirin % yield was calculated to be lower than 100%. Factors that could have contributed to this include incomplete reaction, loss of product during washing and drying, and impurities in the reactants or solvents used.The experiment helped me understand the synthesis and properties of nylon, which I did not know before. I was surprised by the strength and durability of the nylon synthesized. My favorite part was observing the nylon fibers under the microscope, which gave a closer look at the structure of the material.Learn more about nylon :
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The complete question is :
Post-Lab Questions 1. What is the name of the nylon produced in this experiment? It is not Nylon 6,6 but is named in a similar way. 2. In the equation for the formation of Nylon 6,6 in the background, the non-polymer product is water (not depicted in the equation). What is the non-polymer product produced in the reaction you used in lab? 3. Describe two uses of nylon. Substantiate your descriptions with a resource (library, text, or web site) and properly cite this source. Results & Discussion 1. In one or two sentences tell us what you were trying to accomplish. That is, say what the point of the experiment was. 2. Tell us what your experimental approach was. This is supposed to be a summary of no more than 4 sentences. Tell us what you did and why you did it, but don't give us a step-by-step list of things you did. 3. Comment on how close your aspirin % yield was to 100%. Discuss what factors might have contributed to it being higher or lower than this. 4. Tell us what you learned that you didn't know before and what surprised you. Tell us what your favorite part was and why. COMPOUND MOLECULAR WEIGHT WATER SOLUBILITY(g/L) Density (g/ml) at 20'c Salicylic acid 138.12g/mol 1441.07g/L 1.44 Acetylsalicylic acid 180.16g/mol 1400.25g/L 1.4 Acetic anhydride 102.09g/mol 1080g/L 1.08 Sulfuric acid 98g/mol 1830g/L 1.83
The volume of 160. G of CO initially at 273 K and 1. 00 bar increases by a factor of two in different processes. Take CP,m to be constant at the value 29. 14 Jmol−1K−1 and assume ideal gas behavior. The temperature of the surroundings is 273 K.
A) Calculate ΔSsurroundings in an adiabatic reversible expansion.
B) Calculate ΔS in an adiabatic reversible expansion.
C) Calculate ΔStotal in an adiabatic reversible expansion.
D) Calculate ΔSsurroundings in an expansion against Pexternal = 0.
E) Calculate ΔS in an expansion against Pexternal = 0.
F) Calculate ΔStotal in an expansion against Pexternal = 0.
G) Calculate ΔSsurroundings in an isothermal reversible expansion.
H) Calculate ΔS in an isothermal reversible expansion.
I) Calculate ΔStotal in an isothermal reversible expansion.
Determine what processes are spontaneous.
1) adiabatic reversible expansion 2) expansion against Pexternal =0 3)isothermal reversible expansion
Adiabatic and isothermal reversible expansions because they add to the system and environment in a self-expanding manner. is not spontaneous because it does not increase the entropy of the system and environment.
A) ΔEnvironment = -ΔH/T = 0 (adiabatic process)
B) ΔS = nR ln 2 = 0.693 J/K
C) ΔTotal = ΔS ΔEnvironment = 0.693 J/K environment = 0.693 J/K not heat = Δ
D) K environment = Δ exchange = 0. . medium at constant pressure
E) ΔS = nR ln 2 = 0.693 J/K
F) ΔSum = ΔS ΔMedium = 0.693 J/K
G) ΔMedium = -Q/T = n / n / RTln J /0K6.
H) ΔS = 0 (isothermal process)
I) ΔTotal = ΔS ΔEnvironment = -0.693 J/K
Adiabatic and isothermal reversible expansions because they add to the system and environment in a self-expanding manner. is not spontaneous because it does not increase the entropy of the system and environment.
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What is the temperature of calcium chloride, baking soda, and water usually at?
The temperature of calcium chloride, baking soda, and water will depend on the specific application and the environment.
What do you mean by temperature?
Temperature is a measurement of how hot or cold something is. Temperature is expressed in degrees Celsius (°C) or Fahrenheit (°F). The temperature of an object, a room, or the air around us can all be referred to as temperature.
The temperature of calcium chloride, baking soda, and water will depend on the specific application and the environment in which it is used. For example, if calcium chloride is used as a de-icing agent, it will be affected by the outside temperature and humidity. If baking soda is used as a leavening agent in baking, it will be affected by the ambient temperature of the kitchen. Finally, if water is being heated on a stove, the temperature will depend on the heat source and the amount of time it is heated. The temperature of all three will fluctuate depending on the application and environment, making it impossible to provide a definitive answer.
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an igneous rock has quartz in it. based on bowen's reaction series only, which two compositional categories can you rule out for sure? mafic felsic intermediate ultramafic
The two compositional groups that can be ruled out for an igneous rock that contains quartz are mafic and ultramafic based on Bowen's reaction series, which defines the order of mineral crystallisation during the cooling of magma.
A geological principle known as Bowen's reaction series explains the sequence in which minerals form from cooling magma. In the early 1900s, Canadian geologist Norman Bowen made the initial suggestion. The theory describes how different minerals develop at various temperatures when lava cools. Higher temperature minerals begin to develop first, followed by minerals that crystallise at lower temperatures. Understanding the content and texture of igneous rocks requires an understanding of the order in which minerals crystallise. Bowen's reaction series is used to analyse the geological history of a region and anticipate the kinds of minerals and rocks that would occur under certain cooling circumstances.
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Which compositional groups of igneous rocks can be excluded based on the presence of quartz in the rock, and what is the scientific basis for this exclusion?
by titration, 15.0 ml of 0.1008 m sodium hydroxide is needed to neutralize a 0.0907 g sample of a weak acid. part a what is the molar mass of the acid if it is monoprotic?
A 0.0907 g sample of a weak acid requires 15.0 ml of 0.1008 m sodium hydroxide to be neutralized by titration. the molar mass of the monoprotic weak acid is 60.13 g/mol.
We can use the balanced chemical equation of the neutralization reaction to calculate the number of moles of the weak acid that reacted with the sodium hydroxide:
Weak acid + NaOH → NaA + H2O
where NaA is the sodium salt of the weak acid.
The number of moles of sodium hydroxide used can be calculated from its concentration and the volume used in the titration:
n(NaOH) = C(NaOH) x V(NaOH)
n(NaOH) = 0.1008 mol/L x 0.0150 L
n(NaOH) = 0.00151 mol
Since 1 mole of weak acid reacts with 1 mole of sodium hydroxide, the number of moles of the weak acid is also 0.00151 mol.
The molar mass of the weak acid can be calculated using its mass and the number of moles:
Molar mass = mass / moles
Molar mass = 0.0907 g / 0.00151 mol
Molar mass = 60.13 g/mol
Therefore, the molar mass of the monoprotic weak acid is 60.13 g/mol.
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balanced equation for the reaction of nitrogen (picture), as it is normally found in our atmosphere, with oxygen (picture), as it is normally found in our atmosphere, to form nitrogen dioxide?
Balanced equation for the reaction of nitrogen, as it is normally found in our atmosphere, with oxygen is 2N₂ + O₂ → 2N₂O
The complex response is typically supposed to be balanced when the tittles of each element on reactant and product are same. Generally, the" megahit and trial" system is used for the balancing of chemical equation.
Nitrogen and Oxygen reply to form two different composites that can qualify for the name “ nitrogen monoxide ”. And, these two composites have two distinct names that's generally accepted.
2N2 + O2 → 2N2O this emulsion is called nitrous oxide
N2 + O2 → 2NO this emulsion is called nitric oxide, also occasionally( incorrectly) appertained to as nitrogen monoxide.
Both of them have only one oxygen per patch, so they qualify as “ nitrogen monoxide ”. still, they're entirely different composites with veritably different physical and chemical parcels.
Nitrogen has a rich chemistry with oxygen, and forms several other oxides as well- N2O3, NO2, N2O4, N2O5.
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At ST, what would be the volume of nitrogen dioxide in 52.8g of nitrogen dioxide?
a) none of these
b) 22.4 L
c) 25.7 L
d) 19.5 L
e) 44.8 L
a) None of these. The volume of nitrogen dioxide in 52.8g of nitrogen dioxide would depend on the pressure and temperature of the gas. Therefore, none of these is correct.
How is nitrogen dioxide formed?Nitrogen dioxide (NO2) is formed through the reaction of nitrogen oxide (NO) with oxygen in the air. This reaction occurs primarily due to high-temperature combustion processes, such as those in automobile engines, power plants, and industrial boilers.
What are the uses of nitrogen dioxide?Nitrogen dioxide is used in the production of nitric acid, rocket propulsion, and as a food preservative. It can monitor air quality in urban areas, treat pulmonary hypertension, and inhale anaesthesia during surgery.
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question 5
pls help asap
The percent yield is 99%
What is the theoretical yield of the reaction?The theoretical yield of a chemical reaction is the maximum amount of product that can be produced from the given amounts of reactants, assuming complete conversion of all reactants to products and no loss of product during the reaction.
Number of moles of HCl = 73g/36.5 g/mol
= 2 moles
Number of moles of the Mg = 48 g/24 g/mol = 2 moles
If from the reaction;
1 mole of Mg reacts with 2 moles of HCl
2 moles of Hcl will react with 2 * 2/1
= 4 moles
Thus the HCl is the limiting reactant
We have that;
2 moles of HCl produces 1 mole MgCl2
Mass of the MgCl2 = 95 gPercent yield is;
73 g/120 g * 100/1
= 99%
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a bar graph that shows all the organic compounds in an egg.
The bar graph below shows the organic compounds found in an egg. The y-axis displays the amount of each organic compound in percentage, while the x-axis displays the type of organic compound.
What is organic compound?Organic compounds are compounds composed of carbon, hydrogen, and other elements such as oxygen, nitrogen, sulfur, phosphorus, and other elements. Carbon and hydrogen are the two most abundant elements in organic compounds, making up about 90% of the compounds. Organic compounds can be divided into two categories, natural and synthetic. Natural organic compounds are those that are produced in or derived from living organisms, such as carbohydrates, proteins, and lipids. Synthetic organic compounds are those that are made by humans, such as plastics, dyes, and medicines.
The bar graph shows that the most abundant organic compound in an egg is water, making up approximately 75% of the egg's total mass. This is followed by proteins at approximately 13%, fat at approximately 11%, carbohydrates at approximately 1%, and other organic compounds making up approximately 0.2%.
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which of the functional groups shown above is most likely to gain a proton and become positively charged?
The functional groups which is shown above is most likely to gain a proton and become positively charged is The amino group.
The introductory nature of any functional group depends on the chances of the functional group getting protons associated with it. This means that the hydrogens ions in the system are associated with the introductory functional group. This way the functional groups can be charged. The association of hydrogen directly determines the acidic or introductory character of the functional group that remains associated with specific biomolecules.
The amino group is one of several nitrogen- containing functional groups set up in organic motes. What distinguishes the amino group is that the nitrogen snippet is connected by single bonds to either hydrogen or carbon.
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how many grams of pbbr2 will precipitate when excess febr3 solution is added to 79.0 ml of 0.578 m pb(no3)2 solution?
Lead nitrate reacts with ferric bromide to give lead bromide and ferric nitrate. Here the weight of lead bromide precipitate will be 16.75g.
We can write the balanced reaction as follows,
3Pb(NO₃)₂ + 2FeBr₃ -----------> 3PbBr₂ + 2Fe(NO₃)₃
Here ferric bromide is in excess, so the limiting reagent will be lead nitrate.
Number of moles = molarity × volume in L
Number of moles of lead nitrate reacted = 0.578 × 0.079
= 0.0456
3 moles of lead nitrate reacts to form 3 moles of lead bromide.
So 0.0456 moles of lead nitrate gives 0.0456 moles of lead bromide.
Number of moles of lead bromide = 0.0456
Molar mass of lead bromide = 367.01
Mass of lead bromide formed = Number of moles× molar mass
= 0.0456 × 367.01 = 16.75g
So the mass of lead bromide precipitate will be 16.75g
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In a particular experiment, the reaction of 1. 0g of S with O2 produced 0. 80 g of SO3. The % yield in this experiment is how much %?
The actual yield of the product obtained in the experiment must be divided by the theoretical yield of the product that could be achieved. The reaction's percent yield is 32% as a result.
The amount of product produced in a chemical reaction or manufacturing process is referred to as yield, and it is typically expressed in mass or volume. Theoretical yield, actual yield, and percent yield are a few of the several types of yield. Theoretical yield, under the assumption that the reaction continues to completion without any losses or side reactions, is the greatest quantity of product that can be produced from a specific amount of reactants. The amount of product that is actually produced during an experiment or production process is known as the "actual yield." The actual yield to theoretical yield ratio, stated as a percentage, is known as percent yield. The efficiency and profitability of a chemical reaction or manufacturing process are significantly influenced by yield.
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The formulae of two compounds of manganese are MnO2 and KMnO4. What are the oxidation state of manganese in each of these two compounds?
( oxidation state of K: +1 oxidation state of oxygen: -2 )
Answer:
The oxidation state of manganese in MnO2 is +4 and in KMnO4 is +7. This can be determined by using the oxidation states of K (+1) and oxygen (-2) in KMnO4 and the fact that the sum of the oxidation states of all the elements in a neutral compound must be zero. Since there are four oxygen atoms in KMnO4, their total contribution to the oxidation state is -8. To balance this, the oxidation state of manganese must be +7, which means it has been oxidized from +4 in MnO2 to +7 in KMnO4.
Explanation:
problem 20.17 show how this carboxylic acid can be converted into the corresponding alcohol using nabh4 as the reducing agent. hint: can you convert the carboxylic acid into a different acid derivative first?
The reaction sequence allows for the conversion of a carboxylic acid to the corresponding alcohol using NaBH4 as the reducing agent, by first converting the carboxylic acid into a more reactive derivative.
To convert a carboxylic acid into the corresponding alcohol using NaBH4 as the reducing agent, we first need to convert the carboxylic acid into a more reactive derivative, such as an ester or acid chloride. This is because carboxylic acids are relatively unreactive towards reduction.
One way to do this is to react the carboxylic acid with an alcohol in the presence of an acid catalyst to form an ester. The ester can then be reduced to the corresponding alcohol using NaBH4. Alternatively, the carboxylic acid can be converted to an acid chloride by reaction with thionyl chloride, which can then be reduced to the alcohol using NaBH4.
For example, consider the conversion of acetic acid to ethanol. Acetic acid can be converted to the more reactive acetyl chloride by reaction with thionyl chloride:
CH3COOH + SOCl2 → CH3COCl + SO2 + HCl
The resulting acetyl chloride can then be reduced to ethanol using NaBH4:
CH3COCl + NaBH4 → CH3CH2OH + NaCl + B(OH)3
Overall, this reaction sequence allows for the conversion of a carboxylic acid to the corresponding alcohol using NaBH4 as the reducing agent, by first converting the carboxylic acid into a more reactive derivative.
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Explain how the basic laws of matters led to the formulation of daltons atomic theory
Dalton's Atomic Theory proposed a model of the atom as a small, indivisible, and indestructible particle. This theory was based on a set of observations and experiments that followed from the basic laws of matter.
One of the key observations was the law of definite proportions, which states that the proportions of elements in a compound are always the same regardless of the amount or source of the compound. For example, water always consists of two hydrogen atoms and one oxygen atom, no matter where it comes from or how much is present. This observation led to the conclusion that elements combine in fixed ratios to form compounds, suggesting that the elements themselves must be made up of individual, uniform particles.
Another important observation was the law of conservation of mass, which states that the total mass of a system remains constant during a chemical reaction, indicating that matter cannot be created or destroyed. This led to the conclusion that chemical reactions involve the rearrangement of individual particles, rather than the creation or destruction of matter.
Finally, the law of multiple proportions, which states that when two elements combine to form more than one compound, the ratio of the masses of one element that combine with a fixed mass of the other element is always a ratio of small whole numbers. This observation led to the conclusion that elements could combine in different ratios to form different compounds, suggesting that the elements must consist of individual particles with different masses.
Based on these observations, Dalton proposed his Atomic Theory, which stated that:
All matter is made up of atoms, which are small, indivisible particles.Atoms of a given element are identical in size, mass, and other properties.Atoms cannot be created, destroyed, or transformed into atoms of another element.Atoms of different elements combine in fixed ratios to form compounds.Chemical reactions involve the rearrangement of atoms, but no creation or destruction of matter occurs.Overall, Dalton's Atomic Theory was an attempt to explain the basic laws of matter through a model of the atom as a small, indivisible, and indestructible particle that could explain the chemical behavior of elements and compounds. It provided a framework for understanding the behavior of matter and set the stage for further research into the nature of the atom and the fundamental principles of chemistry.
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