The Percent Yield for the following balanced chemical reaction 75.76%.
What exactly is percent yield?Percent yield in chemistry is the percentage of the product's weight to its theoretical yield. In order to quantify the outcome in percent, we divide the experimental yield by the theoretical yield and multiply the result by 100.
Why do we compute percent yield?Because many chemical reactions produce byproducts, not all of the reactants in the equation actually undergo reaction, percent yield is significant. A poor percent yield in product manufacturing would mean that the corporation is wasting resources, including money and reactants.
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write 2-3 sentences to describe and identify the type of reaction that occurs between potassium carbonate (k2co3) and nitric acid (hno3)
This type of reaction between potassium carbonate (k2co3) and nitric acid (HNO3) is Acid-base neutralization reaction.
2HNO3+K2CO3⇒ 2KNO3+H2O+CO2
Potassium carbonate is a weak base whereas Nitric acid is a very strong acid. The reaction between them neutralizes each other forming water. The weak nitric acid reacts with the strong potassium base to produce salt, water and carbon dioxide which is given off.
Molecular ratio of reactants is 2 : 1.
All phases are represented in the equation: aq for aqueous, l for liquid and g for gas (notice how they are written in subscript).
The reaction is an acid-base neutralization reaction.
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Describe the process of calculating the molar mass of Li2S.
The molar mass of the compound as shown is 46 g/mol.
What is the molar mass?We know that the molar mass is the mass of one mole of the substance. In the case of the compound that we have here we have to find out what the molar mass of the compound is.
First, we have to know the relative atomic mass of each of the atoms in the compound. We have that;
Mass of the lithium = 7
Mass of sulfur = 32
Then we would have;
Relative atomic mass = 2(7) + 32 = 46 g/mol
The compound would then has a mass of 46 grams per mole.
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a scientist is testing an unknown metal sample. he burns the sample and measures the spectrum produced. he concludes that the metal is sodium because of the characteristic bright yellow lines he observes. what is the general term for the type of technique he is performing?
The answer to the question indicates that the scientist is engaged in spectroscopy.
What is sodium's simple definition?(SOH-dee-um) A mineral required by the body to maintain the proper balance of body fluids. Table salt and many processed meals also contain sodium. The body may retain water if it is oversalted.
What functions does salt serve?In some nuclear plants, sodium is employed as a heat exchanger.It is also utilized in the chemical industry as a reagent. Instead, sodium salts are so much more advantageous than sodium alone. Sodium chloride is the most prevalent sodium compound (common salt). It is used to flavor meals and de-ice roadways in the winter.
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a chemist divides a 15.0 liter solution into two portions. the first portion has four times the volume of the second. find the volume of the second portion.
The volume of the second portion is 3.75 liters. To solve this problem, let x represent the volume of the second portion. We can then set up the equation
what is equation?A mathematics statement that expressions are equal is known as an equation. It consists of two expressions separated by an equals sign, and the expressions on either side can be numbers, variables, or a combination of both. Equations are used to solve problems in mathematics, science and engineering, and are fundamental to the study of these disciplines. Equations can be used to describe relationships between different elements of a system, such as the force of gravity on a falling object or the momentum of a moving object. Solving equations involves manipulating the equation to find the values of the unknown variables, and this process is called solving the equation.
4x = 15.0
Solving for x, we get:
x = 15.0 / 4
x = 3.75
Therefore, the volume of the second portion is 3.75 liters.
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redox reaction occurs between iron and tin with the half-reactions shown. what can you conclude about the spontaneity of the reaction
The supplied question indicates that the iron-tin redox reaction's spontaneity is -0.92V.
Why is it known to as redox?The combined processes of reduction and oxidation are known as redox reactions due to their complimentary nature. The oxidant is the reactant that causes the oxidation, whereas the reducing agent itself reduces this reagent.
Why is redox one such big deal?Given that they are the primary sources of power on this world, both spontaneous and man-made (or "redox"), oxidation-reduction processes are significant. Massive amounts of energy are often generated when molecules undergo oxidation through the elimination of hydrogen or in conjunction with oxygen.
Al^3+(aq) + 3e− = Al(s) Eº = −1.66 V
Cr(s) = Cr^3+(aq) + 3e− Eº = +0.74 V
Adding #1 and #2 gives:
Al^3+(aq) + 3e− + Cr(s) = Al(s) + Cr^3+(aq) + 3e− Eº = −0.92 V
Removing 3e- from both sides:
Al^3+(aq) + Cr(s) = Al(s) + Cr^3+(aq)
Eº = −0.92 V
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Calculate the [H3O+] of the following polyprotic acid solution: 0.145M H3C6H5O7.
Calculate the pH of this solution.
To calculate the pH of this solution, we must use the equation pH = -log[H3O+], which yields a pH of 1.834.
What is pH?pH is a measure of the acidity or alkalinity of a solution. It is measured on a scale from 0 to 14, with lower numbers indicating an acidic solution and higher numbers indicating a basic or alkaline solution.
The chemical equation for the dissociation of H3C6H5O7 is:
H3C6H5O7 + H2O <=> H3O+ + H2C6H5O7-
The first dissociation of H3C6H5O7 produces one H3O+ ion for every H2C6H5O7- ion. Therefore, the [H3O+] is equal to the molar concentration of the acid, which is 0.145M.
To calculate the pH of this solution, we must use the equation pH = -log[H3O+], which yields a pH of 1.834.
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look at the melting point for the metals in the fourth and fifth periods describe how the position of a metal within a period is related to irs melting point
With the same number of elements and overall structure as period 4, period 5 differs only in having one more post transition metal and one fewer nonmetal.
How do melting and boiling points differ?The major distinction between boiling point and melting point is the temperature at which a liquid's vapour pressure equals its external pressure whereas the melting point is the temperature at which solid and liquid phases are in balance.
How is melting point determined?More energy is required to overcome them the stronger the forces of attraction between the particles are. The melting point rises with increasing energy demand. Therefore, a crystalline solid's melting temperature serves as a gauge.
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The side of the ladder are made up of alternating ____ and ____ molecules the steps of the ladder are made up of _____ held together by hydrogrn
The side of the ladder are made up of alternating sugar and phosphate molecules the steps of the ladder are made up of bases held together by hydrogen bonds.
The fundamental unit of DNA is referred to as a nucleotide. One sugar molecule, one phosphate molecule, and one of the four bases make up a nucleotide. DNA's nucleotides align to form two lengthy backbones that resemble a ladder's handrails in the shape of sugar and phosphate molecules. Between the sugar molecules on the two handrails, two bases combine to form the ladder's rungs. The "rungs" between the phosphate molecules are absent. This was significant to Watson and Crick since it enabled them to understand the formation of the double helix.
James Watson and Francis Crick discovered the DNA structure in 1953. A double helix, often known as a twisted ladder, is the structure. Sugar and phosphate molecules alternately make up the sides of the ladder. Hydrogen bonds serve as a flimsy means of holding the two sides of the DNA ladder together.
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if the bond length of h2 is experimentally found to be 72 pm and the bond length of br2 is experimentally found to be 240 pm, what is the bond length of hbr?
If the bond length of H₂ is experimentally found to be 72 pm and the bond length of Br₂ is experimentally found to be 240 pm, the bond length of HBr is 158.5 pm.
The distance between the centers of two bonded atoms is known as the bond length. Consider the fact that the atomic radius of an element is equal to one-half the distance between the bound atoms in a homonuclear diatomic molecule (sometimes referred to as the covalent or bonding atomic radius).
Every time two nuclei are brought closer together to build a stronger relationship, the link gets shorter. The coulombic attraction on the bonding electrons pulls the nuclei together, resulting in a shorter bond.
The bond length of HBr can be calculate as follows:
Bond length of bromine molecule = 240 pm
Bond length of hydrogen molecule = 77 pm
radius of bromine (r Br) = 240pm/ 2 = 120 pm
radius of hydrogen (rH) = 77/2 = 38.5 pm
Bond length of C-Cl = rH+ rBr = 120 pm + 38.5 = 158.5 pm
Therefore, the bond length of HBr is 158.5 pm.
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10.28 g bismuth oxide containing 8.3 g bismuth
The empirical formula of the oxide would be [tex]BiO_3[/tex].
Empirical formulaThe empirical formula of a compound is the chemical formula showing the component atoms of the compound in their simplest, whole-number ratio.
The compound in question contains bismuth and oxygen.
Mass of bismuth + oxygen = 10.28 g
Mass of bismuth = 8.3 g
Mass of oxygen = mass of bismuth + oxygen - mass of bismuth
= 10.28 - 8.3 = 1.98 grams
Moles of each atom:
Bismuth = 8.3/209 = 0.04 mol
Oxygen = 1.98/16 = 0.12 mol
Divide by the smallest mole:
Bismuth = 0.04/0.04 = 1
Oxygen = 0.12/0.04 = 3
Thus, the empirical formula of the oxide is [tex]BiO_3[/tex].
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Find the empirical formula of the oxide when 10.28 g bismuth oxide contains 8.3 g bismuth.
Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released).
In chemistry, bond strength is the force that a chemical bond uses to hold two atoms together.
The bond dissociation energy, or the amount of energy needed to break a certain covalent bond in a mole of molecules, is a measure of a covalent bond's strength. Multiple bonds between the same atoms are more powerful than a single bond.
Chemical reactions that release energy are known as exothermic reactions. Light or heat are released as a result of this interaction. Energy is used in an endothermic reaction. Enthalpy, or delta H, is the change in heat energy. The reaction is exothermic if the product enthalpies are more than the total of the reactant enthalpies. The process is endothermic if the products side has a higher enthalpy than the process side. As a result, the reaction is exothermic if delta H is negative. A process is endothermic if delta H is positive.
Exothermic are: A+BC -> AB+C A2+B2 -> 2AB
Endothermic are: AB+C -> AC+B A2 + C2 -> 2AC B2+C2 -> 2BC
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The complete question is
Based on relative bond strengths, classify these reactions as endothermic (energy absorbed) or exothermic (energy released)
endothermic
B2+C2-->2BC
A+BC-->AB+C
exothermic
AB+C-->AC+B
A2+C2-->2AC
A2+B2-->2AB
(a) calculate the %ic of the interatomic bond for the intermetallic compound tial3. (b) on the basis of this result, what type of interatomic bonding would you expect to be found in tial3? (a) enter your answer in accordance to the question statement %ic (b) ionic van der waals covalent metallic
0.12% of the substance is ionic characters, and metallic interatomic bonds would be present.
What distinguishes an ionic character?Calculating the difference in electronic configuration between the two atoms using the formula = B A is one method of determining the ionic quality of a bond, or the extent of the ionic conductivity in a polar covalent connection.
On what is the character of Ionic based?The disparity in electronegativities determines how ionic. The stronger the bond, or greater inclination to attract electrons, the greater the binding energy. The least inorganic bonds are those comprised of two non-metals, and the closer two non-metals' electronegativity values are to one another, the smaller the percentage of ionic character will be.
%ic interatomic bond = [1 - e^-(XA - XB)^2/4] * 100%
XA = electronegativity of Ti
= 1.61
XB = electronegativity of Al
= 1.54
Substituting values;
= [1 - e^-(1.61 - 1.54)^2/4] * 100%
%ic interatomic bond = 0.12%
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What carbonyl compounds might you start with in a Grignard synthesis of the following compound? 3-phenyl-3-pentanol - You do not have to consider stereochemistry. - If more than one structure fits the description, draw them all. - There may be up to three carbonyl compounds that could be used. - Any ester used should be a methyl ester. - Draw one structure per sketcher. - Add additional sketchers using the dropdown menu in the bottom right corner. - Separate structures with + signs from the dropdown menu.
It is clear that the hydroxide ion the primary potassium hydroxide ions will convert in the case of a simple hydrocarbon ketone in a complexation solvent, for instance.
What use do methyl esters serve?Methyl ester is meant to be used as an alternative to petroleum-based diesel fuel or it can be merged with diesel fuel in any amount to create "biodiesel," which is usually thought to be more environmentally benign.
A particular class of three fatty acid chains called monoalkyl ester (FAME) is produced by transesterifying lipids with methanol. The main molecules for biodiesel are FAME, which are typically produced by transesterifying vegetable oils.
Who or what is a methyl ester group?Among the various types of fatty acid esters, fatty acid methyl additives (FAME) are a product created by transesterifying lipids using methanol. The main molecules in biofuels are FAME, which are typically produced by transesterifying vegetable oils. Detergents and biodiesel are made with them. The most common way to make methyl esters is by acid-catalyzed reactions with methanol. This method's main benefit is that free acids are simultaneously esterified and bound acids,
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which is the best practice recommended in the safety video to mix an acid or a base with a solvent? group of answer choices add acid or base to the solvent the order is irrelevant you pour them at the same time add solvent to the acid or base
The Option d) Adding an acid or basic to the solvent is the proper choice. The safety video suggests mixing an acid or a basic with a solvent as the best practice.
What does a chemistry solvent do?Many reactions are made easier by solvents, which are substances that dissolves solutes and create solutions. They are utilized for a variety of tasks, including dry cleaning, painting, and extractions. They can be as toxic as dichloromethane or as harmless as water.
What makes it solvent?A substance that is used for a solution is called a and (from the Latin solv, "one, untie, solve"). Solutes can also be supercritical fluids, solids, or gases in secondary to being liquids.
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The Complete Question :
Which is the best practice recommended in the safety video to mix an acid or a base with a solvent?
a) you pour them at the same time
b) the order is irrelevant
c) add solvent to the acid or base
d) add acid or base to the solvent
Adding an acid or basic to the solvent is the proper choice. The safety video suggests mixing an acid or a basic with a solvent as the best practice.
What does a chemistry solvent do?Many reactions are made easier by solvents, which are substances that dissolves solutes and create solutions. They are utilized for a variety of tasks, including dry cleaning, painting, and extractions. They can be as toxic as dichloromethane or as harmless as water.
A substance that is used for a solution is called a and (from the Latin solv, "one, untie, solve"). Solutes can also be supercritical fluids, solids, or gases in secondary to being liquids.
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The Complete question is as follows:
Which is the best practice recommended in the safety video to mix an acid or a base with a solvent?
a) you pour them at the same time
b) the order is irrelevant
c) add solvent to the acid or base
d) add acid or base to the solvent
Classify each property as intensive or extensive.boiling pointmass density temperaturevolume color length hardness
An intensive property is a physical characteristic that occurs as a substance's quantity of matter varies. While an extensive property is a change in a substance's amount of matter.
Which property qualifies as intensive?When a characteristic remains unaffected by the mass of an element or system, it is classified as intense. Density (D), pressure (P), and temperature (T) are a few characteristics of strong characteristics (r).
Real estate in intensive use: Is it Independent?The sample size utilized to test the attribute has no bearing because intense qualities are bulk independent. A sample of liquid water, for instance, has the same density whether that it's in the form of a tumbler or a cubed foot. It is a priceless asset.
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Which of the following phase changes involves the transfer of heat from the surroundings to the system?
A phase change in which heat is transferred from the surroundings to the system is endothermic. The phase change that involves the transfer of heat from the surroundings to the system is melting.
Melting is the process of a solid turning into a liquid, which requires energy, in the form of heat, to be added to the system in order to overcome the forces holding the solid particles together. This is why melting is an endothermic process, which means that heat is absorbed from the surroundings.
Melting is a phase change in which a solid turns into a liquid. During this process, energy is required to break the forces holding the solid particles together. This energy is in the form of heat, which is transferred from the surroundings to the system, making melting an endothermic process. The opposite of this process is freezing, where a liquid turns into a solid, this process releases heat to the surroundings, making it exothermic. The endothermic process of melting is also called fusion, and the exothermic process of freezing is also called solidification.
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how many hydrogen atoms are connected to the carbon atom that bears the negative charge in the structure below?
In the structure below, the carbon atom that bears the negative charge is connected to two hydrogen atoms.
What is hydrogen atom?Hydrogen Atom is a single atom composed of one proton and one electron. It is the simplest and most abundant type of atom in the universe, making up about 75% of all matter. Hydrogen atoms are extremely small and have no measurable volume. They are held together by the electromagnetic force between the positively charged proton and the negatively charged electron.
This is because the two red dots, which represent the negative charge, are at the end of two single bonds connected to two hydrogen atoms. Therefore, the carbon atom is connected to two hydrogen atoms.
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in all of these analyses the energy gained and lost was balanced. what would happen if this was no longer in balance?
Energy balance on Earth. You are aware that the Earth's surface equally absorbs and emits radiation. At 255F o (-18°C or 0°F), the rate of Humanity's emission and absorption are balanced.
What is the atmosphere's radiation balance?While some atmospheric gases absorb certain wavelengths of radiation, converting their energy into heat, other gases are transparent, allowing radiation to travel freely through them without being absorbed.
What causes the imbalance in energy?"An expected result of rising levels of air pollution, particularly those from carbon dioxide, methanol, aerosol, and black carbon particles, is the energy imbalance. These contaminants increase solar absorption and prevent heat radiation from the Earth from escaping into space "Jim Hansen from NASA's Goddard Space Flight Center.
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What is the original temperature of the water from this question? Please help!
Answer: A temperature of 273 K is the temperature at which water FREEZES.
The original temperature of the water was 20.64°C (rounded to two decimal places).
To find the original temperature of the water, we can use the formula for heat transfer:
Q = m * c * ΔT
where Q is the heat transferred, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.
Given:
Q = 3200 J (heat transferred)
m = 25 g (mass of water)
c = 4.18 J/g°C (specific heat capacity of water)
We want to find ΔT, which is the change in temperature.
Rearrange the formula to solve for ΔT:
ΔT = Q / (m * c)
ΔT = 3200 J / (25 g * 4.18 J/g°C)
ΔT ≈ 30.62°C
Now, we can find the original temperature of the water:
Original temperature = Final temperature - ΔT
Original temperature = 67°C - 30.62°C
Original temperature ≈ 36.38°C
So, the original temperature of the water was approximately 36.38°C.
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Convert 4394 mL to qts. (1 L = 1.06 qt)
Question 1 options:
4145 qts
4.145 qts
4.658 qts
4394 qts
Convert 71.8 lb to g. (1 lb = 453.6 g)
Question 2 options:
3.26 X 104g
1.58 X 105g
3.26 X 10-1g
1.58 X 10-1g
1. When we convert 4394 mL to qts, the result obtained is 4.658 qts (4th Option)
2. When we convert 71.8 lb to g, the result obtained is 3.26×10⁴ g (1st option)
1. How do I convert 4394 mL to qts?First, we shall convert 4394 mL to liters (L). Details below
1000 mL = 1 L
Therefore,
4394 mL = (4394 mL × 1 L) / 1000 mL
4394 mL = 4.394 L
Finally, we shall convert 4394 mL (i.e 4.394 L) to qts. This is shown below:
1 L = 1.06 qt
Therefore,
4.394 L = (4.394 L × 1.06 qts) / 1 L
4.394 L = 4.658 qts
Thus, we can conclude that 4394 mL is equivalent to 4.658 qts (4th Option)
2. How do I convert 71.8 lb to g?We can convert 71.8 lb to grams (g) as illustrated below
1 lb = 453.6 g
Therefore,
71.8 lb = (71.8 × 453.6 g) / 1 lb
71.8 lb = 3.26×10⁴ g
Thus, we can conclude that 71.8 lb is equivalent to 3.26×10⁴ g (1st option)
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what is the final product in this nuclear equation when 226 88 ra undergoes alpha decay ? 226 88 ra --> 42 he ?
Radon-222 22286Rn is produced by the alpha decay of radium-226 22688Ra.
What is nuclear reaction?A nuclear reaction is a process in nuclear physics and nuclear chemistry in which two nuclei, or a nucleus and an external subatomic particle, collide to produce one or more new nuclides. As a result, a nuclear reaction must result in the transformation of at least one nuclide. The splitting of the uranium-235 nucleus when bombarded with neutrons is an important example of nuclear fission. This nuclear reaction can produce a variety of products, as shown in the equations below. The splitting of the plutonium-239 nucleus is another important example of nuclear fission.
Here,
The alpha decay of radium-226 22688Ra produces radon-222 22286Rn.
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Consider the relationship of the variables in Newton’s second law. In a drag car race, the force applied to the car is doubled by the driver stepping on the gas pedal.
The acceleration of the car will
.
The mass of the car will
.
The velocity of the car will
.
The applied force of 3 washers will increase the applied force on the car to
N.
In a drag race, the force delivered to the automobile is twice by the driver pushing on the gas pedal, based on the connection of the variables in Newton's second law.
The car's acceleration will double.
The car's mass will stay constant.
The car's velocity will rise.
What is Newton's second law of motion?Remember that the force on an item is linked to its mass and acceleration by the formula F = ma, where m is the object's mass and an is its acceleration. What happens when we multiply F by two? You might recall from algebra that if we double one side, we must also double the other, so our equation becomes 2F = 2ma. This is necessary to maintain our equality. Either the mass has doubled or the acceleration has doubled, depending on your perspective.
We can tell right away that it would be ridiculous if a race car's mass doubled with every pedal press, so the quantity that is doubling must be the acceleration. The new velocity of the car will be determined by adding the doubled acceleration to its current velocity, v1, which we shall refer to as. V = v1 + 2a in mathematics.
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in a reaction, a reactive intermediate . . . can never be isolated due to its high energy. is an energy maximum between 2 transition states. is an energy minimum between a reactant and a product. is always equal to the number of steps in a reaction. is an energy minimum between 2 transition states.
Because it always equals the total number of steps in a process, a reactive intermediate.
What is a reaction in science?In a chemical reaction, one or more chemicals, usually known as reactants, change into one or more other compounds, frequently referred to as products. Chemical parts or chemical elements make up substances. A response is a behavior, propensity, or course of action that is different from what was first intended. Decisions are taken in the heat of the moment without much thought or consideration of the potential repercussions. Reaction: Making a declaration in response to another person's action or remark.
What are examples of reactions and what causes chemical reactions?Changes in color, temperature, gas production, or precipitant formation are common outcomes of chemical reactions. Combustion, digestion, and cooking are a few straightforward instances of daily reactions.
Atoms create and break chemical bonds during chemical reactions. Reactants are the molecules that initiate a chemical reaction, and products are the compounds that are created as a result of the reaction.
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___ takes place when a hot body of magma intrudes into the cold, upper part of the crust.
Answer: contact metamorphism
Explanation:
Contact metamorphism happens when a body of magma intrudes into the upper part of the crust. Heat is important in contact metamorphism, but pressure is not a key factor, so contact metamorphism produces non-foliated metamorphic rocks such as hornfels, marble, and quartzite.
Which combinations of n and l represent real orbitals and which are impossible?a. 1sb. 2pc. 4sd. 2d
The combination of the n and l represent the real orbitals the impossible one is 2d . It will not occur as orbital in electronic configuration.
1) 1s = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
2) 2p = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
3) 4s = In the electronic configuration it occurs as a orbital. This means it represent the real orbitals.
4) 2d = In the electronic configuration it not occurs as a orbital. This means it is not represent the real orbitals.
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Would you expect nonpolar molecules to "stick together" more or less effectively than polar molecules?
Non-polar molecules are less effective at "sticking" than polar molecules.
Nonpolar molecules are less effective at "sticking" than polar molecules because they lack dipoles that can form positive and negative ends held together by dipole-dipole interactions. The inter-dipole interactions between these instantaneous dipoles are known as dispersion forces. These forces, also called van der Waals forces, help neutral atoms and nonpolar molecules attract each other. Polar molecules differ from non-polar molecules in that they have positive and negative ends and strong intermolecular attractive forces. Non-polar molecules are less effective at "sticking" than polar molecules.
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Petunia needs 75.05 grams of potassium hydroxide (KOH) to run a reaction in class. How many moles of potassium hydroxide does she need? Please round your answer to two digits after the decimal point, and remember to include correct, complete units (including substance formula).
*. Please round your answer to two digits after the decimal point, and remember to include correct, complete units (including substance formula). *
Answer:
Below
Explanation:
From periodic table
Mole wt of K = 39.098
H =1.008
O=15.999 total wt per mole KOH = 56.105 gm/mole
75.05 gm / 56.105 gm/mole = 1.34 moles of KOH
the reaction, at 50% yield, produces 4.0 moles of n2. what was the mass of hydrazine used? assume that o2 is in excess.
N2(g) + 2 H2O N2(g) + O 2(g) (g) At a 50% yield, the process generates 4.0 moles of N2. Therefore, 4.0 * 100 / 50 = 8.0 moles of hydrazine are used to produce the theoretical yield of N2.
Are rockets still powered by hydrazine?
Hydrazine is still used in some military vehicles nowadays, but it's mainly used for extraterrestrial exploration. Hydrazine was used to help the Curiosity Rover touch down on Mars in 2012. Since then, it has been living there.
Why is hydrazine such a poison?
Since the liquid is caustic, both humans and animals who come into touch with it may develop dermatitis. Animals who were chronically (over a lengthy period of time) exposed to hydrazine through inhalation have shown effects on their thyroid, liver, spleen, and lungs.
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what are some questions you can investigate using the periodic table to figure out whether the poison was phosphorus or radium? give a reason for asking your question.
To investigate using the periodic table is that The color of the element. The exposure test of the element. The boiling and the me radium is radioactive. The radium is not available for the general public purpose.
In the periodic table there are some question to investigate whether the the poison was phosphorus or radium are :
Atomic radius of the element.The color of the elementThe exposure test of the elementThe boiling and the melting point of the element.The red phosphorus in its purest form consider as the non toxic. The white phosphorus is the deadly poison , when exposed to the air.
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when hydrogen sulfide gas is bubbled into a solution of sodium hydroxide, the reaction forms sodium sulfide and water. how many grams of sodium sulfide are formed if 1.25 g of hydrogen sulfide is bubbled into a solution containing 2.00 g of sodium hydroxide, assuming that the sodium sulfide is made in 92.0% yield?
The amount of sodium sulfide is formed when 1.25 g of hydrogen sulfide is bubbled into a solution containing 2.00 g of sodium hydroxide, at 92.0% yield is found as 0.897 g
What are molar mass and a mole?Avogadro's number (6.022 x 1023) of molecules (or formula units) make up one mole of a substance (ionic compound). The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the amount of grammes per mole of a substance, to put it another way.
How to find the amount of Na2S present based on molar mass?2NaOH + H2S => Na2S + 2H2O
Moles = Mass/ Molar mass;
The molar mass of hydrogen sulphide is 34 g/mol.
moles => 1.25/34 => 0.036mol
The molar mass of sodium hydroxide is 40 g/mol.
moles=> 2/40 => 0.05mol
The stoichiometric coefficient of NaOH is 2
moles of NaOH = 0.05/2 = 0.025 mol
The mass of NaOH used => 0.025 x 40 => 1g
The molar mass of Na2S = 78 g/mol
Based on balanced reaction, 80 grams of NaOH will give 78 g of Na2S.
=> 1g of NaOH => 78 x1/80 => 0.975g of Na2S
92 % of 0.975 = > 0.897 g of Na2S.
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