E) None of the above is the correct answer. The voltage produced by the colorimeter is logarithmically related to the absorbance of the sample and proportional to the light intensity.
The study of measuring the concentration of a coloured substance in a solution is known as colorimetry. A colorimeter is a tool that is sensitive to light. It is used to gauge the amount of light that passes through a liquid sample both transmittance and absorption. During colour measurement, the fluctuation in electromagnetic radiation's intensity in the visible wavelength area of the spectrum as a result of transmission or reflection by an object or solution is counted. Such a test can help determine the concentration of chemicals since the amount and colour of light that is absorbed or transmitted relies on the properties of the solution, including the number of particles in it.
Here is more information about colorimeter: brainly.com/question/29692263
#SPJ4
The amount of gas dissolved in solution tends to __ as the temperature decreases
Remain the same
Increase
Decrease
The amount of gas dissolved in solution tends to increase as the temperature decreases.
What is the ideal gas law?The ideal gas law describes the relationship between the amount of gas, temperature, pressure, and volume of an ideal gas. It states that the product of the pressure and volume of a gas is directly proportional to the number of gas molecules present (measured in moles), the temperature of the gas (measured in Kelvin), and a constant known as the gas constant (R). This can be expressed mathematically as PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is gas constant, and T is the temperature in Kelvin.
To know more about ideal gas law , visit:
https://brainly.com/question/30458409
#SPJ1
Answer: Increase
Explanation:
ultraviolet, visible, and infrared light are all examples of __ radiation, which has the properties of both particles and __.
Ultraviolet, visible, and infrared light are all examples of non-ionizing radiation, which has the properties of both particles and waves.
Non-ionizing radiation is defined as a type of low-energy radiation that does not have enough energy to remove an electron (negative particle) from an atom or molecule. Generally, non-ionizing radiation includes visible, infrared, and ultraviolet light, microwaves, radio waves, and radiofrequency energy from cell phones.
Wave is defined as a disturbance or variation that transfers energy progressively from point to point in a medium and that may take the form of an elastic deformation or of a variation of pressure, electric or magnetic intensity, electric potential, or temperature.
Learn more about non-ionizing radiations from the link given below.
https://brainly.com/question/1504254
#SPJ4
Which one of the following amino acids is MOST likely to participate in hydrogen bonding with water?
valine
alanine
leucine
asparagine
phenylalanine
The amino acid that is most likely to participate in hydrogen bonding with water is asparagine (Asn).
Asparagine contains an amide functional group (-CONH-) in its side chain, which can act as a hydrogen bond donor and acceptor. This allows asparagine to interact with water molecules through hydrogen bonding, making it more hydrophilic (water-loving) than the other amino acids listed. Valine (Val), leucine (Leu), and phenylalanine (Phe) are hydrophobic (water-fearing) amino acids because their side chains do not contain functional groups that can participate in hydrogen bonding with water. Alanine (Ala) contains a methyl functional group (-CH3) in its side chain, which is also hydrophobic and does not participate in hydrogen bonding. Therefore, asparagine is the most likely amino acid to participate in hydrogen bonding with water.
Learn more about amino acids here:
https://brainly.com/question/14583479
#SPJ4
What mass of mgF2 is needed to produce 1. 4 mol of liF
To produce 1.4 mol of LiF, we need 0.7 mol of MgF2. This corresponds to a mass of 43.6 grams of MgF2, based on the molar mass of MgF2.
Summary of Calculations for Producing LiF with MgF2.We're given that we need to produce 1.4 mol of LiF, and we're asked to find out how much MgF2 is needed for this reaction. We can start by writing out the balanced chemical equation for the reaction:
MgF2 + 2 LiF → 2 LiF + MgF2
From this equation, we can see that 1 mol of MgF2 reacts with 2 mol of LiF to produce 1 mol of MgF2 and 2 mol of LiF. This means that the stoichiometry of the reaction is 1:2 for MgF2 and LiF. In other words, for every 1 mol of MgF2 that reacts, 2 mol of LiF is produced.
So, if we want to produce 1.4 mol of LiF, we need to use stoichiometry to figure out how much MgF2 we need. We can use a conversion factor that relates the number of moles of LiF to the number of moles of MgF2:
1.4 mol LiF × (1 mol MgF2 / 2 mol LiF) = 0.7 mol MgF2
This tells us that we need 0.7 mol of MgF2 to produce 1.4 mol of LiF.
To convert from moles to grams, we can use the molar mass of MgF2, which is 62.3 g/mol. Multiplying the number of moles by the molar mass gives us the mass of MgF2 needed:
0.7 mol MgF2 × 62.3 g/mol MgF2 = 43.6 g MgF2
Therefore, we need 43.6 grams of MgF2 to produce 1.4 mol of LiF.
To know more about molar mass, visit:https://brainly.com/question/12127540
#SPJ4
You make a solution of a nonvolatile solute with a liquid solvent. Indicate if each of the following statements is true or false. (a) The freezing point of the solution is unchanged by addition of the solvent.
False. The addition of a solute to a solvent typically lowers the freezing point of the solution compared to the freezing point of the pure solvent.
This is due to the fact that the solute particles interfere with the arrangement of the solvent particles, which makes it more difficult for the solution to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. Freezing point depression is a colligative property, which means that it depends on the concentration of solute particles in the solution, rather than on their chemical nature. When a non volatile solute (a solute that does not evaporate at room temperature) is dissolved in a solvent, it increases the number of solute particles in the solution. These solute particles interfere with the arrangement of the solvent particles, making it more difficult for the solvent to freeze. As a result, the solution has to be cooled to a lower temperature in order for it to freeze, which results in a lower freezing point compared to the pure solvent. To summarize, the addition of a non volatile solute to a solvent typically lowers the freezing point of the solution, and therefore the statement "The freezing point of the solution is unchanged by the addition of the solvent" is false.
To learn more about solute refer to this link
https://brainly.com/question/7932885
#SPJ4
Why does an aerial firework require two explosions of black powder?
The fireworks are set off by the first explosion, and the stars are ignited and dispersed over the sky by the second explosion.
What do you mean by the term an explosion ?An explosion is a sudden increase in volume accompanied by a tremendous energy release that typically results in the production of high temperatures and the discharge of high-pressure gases.
Black powder has to explode twice for an aerial firework to perform correctly.
The effectiveness of the firework as a whole depends on the precise timing and positioning of each explosion as well as the usage of particular chemicals in the effect charge.
Thus, an aerial firework requires two explosions of black powder because the firework is set off by the first explosion, and the intended visual effects are produced by the second explosion.
To learn more about an explosion, follow the link;
https://brainly.com/question/30682364
#SPJ2
A Hair product requires you to combine 20.0 mL of hydrogen peroxide with enough water to produce a solution
with a total volume of 120.0 mL. Determine the percent by volume concentration of the solution?
Answer:
Explanation:
The volume of water needed to make a 120.0 mL solution can be calculated by subtracting the volume of hydrogen peroxide from the total volume:
The volume of water = Total volume - Volume of hydrogen peroxide
= 120.0 mL - 20.0 mL
= 100.0 mL
The percent by-volume concentration of the solution can be calculated as follows:
The percent by volume = (Volume of hydrogen peroxide / Total volume) * 100
= (20.0 mL / 120.0 mL) * 100
= 16.67%
So, the solution has a concentration of 16.67% hydrogen peroxide by volume.
For waste hazardous materials packaged in a lab pack, the inside packaging must be?
The interior packagings must either be made of glass with a maximum capacity of 4 L (1 gallon) or of metal or plastic with a maximum capacity of 20 L (5.3 gallons).
A chemically suitable absorbent material must be present around inner packaging holding liquid in an amount adequate to absorb the entire liquid content.
physical packing. Only one type of waste material may be contained in each outer package. Except for Division 4.2 Packing Group I materials, which must be packaged in UN standard steel or plastic drums tested and marked to the Packing Group I performance level for liquids or solids, and bromine pentafluoride and bromine trifluoride, which cannot be packaged in UN 4G fiberboard boxes, the following outer packagings are permitted.
a metal drum (UN 1A2, UN 1B2, or UN 1N2), a plywood drum (UN 1D), a fibre drum (UN 1G), a plastic drum (UN 1H2), tested, and designated to at least the Packing Group III performance.
Learn more about Metal here:
https://brainly.com/question/18153051
#SPJ4
12.0 g of K₂Cr2O7 reacts with 10.0 g of HCl in the following
reaction
K2Cr2O7 + 14HCl → 2CrCl3 + 7H₂O + 3Cl2 + 2KCI.
What is the theoretical yield of CrCl3 ?
According to percent yield, the theoretical yield of chromium chloride is 12.91 grams.
What is percent yield?Percent yield is defined as the ratio of actual yield to the theoretical yield multiplied by 100. If the actual and theoretical yield are same then the percent yield is 100%.If actual yield is less than the theoretical yield then the percent yield is less than 100%.Reason of this condition arising is the incompletion of reaction or loss of sample during recovery process.
294.185 g potassium dichromate gives 316.72 g chromium chloride thus 12 g potassium dichromate gives 12×316.72/294.185=12.91 g.
Thus,the theoretical yield of chromium chloride is 12.91 grams.
Learn more about percent yield,here:
https://brainly.com/question/2506978
#SPJ9
what is the mass of 3.01x10^24 water molecules?
Answer:The mass of a single water molecule can be calculated using its molecular formula, H2O. The molecular weight of water is 18.015 g/mol.If we have 3.01 x 10^24 water molecules, the total mass can be calculated as follows:Mass = Number of water molecules * Molecular weight of waterMass = 3.01 x 10^24 * 18.015 g/molMass = 5.45 x 10^25 gSo, the mass of 3.01 x 10^24 water molecules is approximately 5.45 x 10^25 grams.
the strength of peptidoglycan resides in group of answer choices sugar polymers. peptide linkages. d-amino acids. both a and b all of the above
The strength of peptidoglycan resides in both sugar polymers and peptide linkages, so the correct answer is "both a and b."
Peptidoglycan is a polymer that makes up the cell wall of most bacteria. It consists of long chains of sugar molecules (N-acetylglucosamine and N-acetylmuramic acid) linked together by peptide chains composed of both L- and D-amino acids. These peptide chains provide strength and rigidity to the peptidoglycan, while the sugar polymers give it a flexible and porous structure.
The peptide linkages are particularly important for the strength of the peptidoglycan because they form cross-links between adjacent sugar chains, creating a mesh-like network that provides the cell wall with its strength and shape. The D-amino acids are also crucial for the stability of the peptide chains, as they make the cell wall resistant to degradation by bacterial enzymes that would otherwise break down the peptide bonds.
In summary, both the sugar polymers and peptide linkages are important for the strength of peptidoglycan, making "both a and b" the correct answer.
Learn more about Peptidoglycan here:
https://brainly.com/question/13021055
#SPJ4
Chlorine (Cl) has 17 electrons. How many electrons are in the n = 1, n = 2, and n = 3 levels, respectively, of a chlorine atom?
2, 8, 7
2, 6, 9
8, 2, 7
7, 8, 2
Chlorine's electrical configuration will be 2, 8, 7, because its atomic number (Z) is 17. In the L shell, there are eight electrons (second shell).
Chlorine has an atomic mass of 35.45 and an atomic number of 17, which means that each of its atoms contains 17 protons, 17 electrons, and 18 neutrons. As a result, you are already aware that for the element chlorine, the atomic number indicates how many electrons there are. In other words, a chlorine atom contains 17 electrons. This chlorine atom has 17 protons since the atomic number is equal to the number of protons in an atom. Since there are exactly as many electrons as protons in neutral atoms, we can infer that there are 17 electrons total that need to be divided among the electron shells.
Learn more about chlorine here:
https://brainly.com/question/14962130
#SPJ4
summerize case study amphilbians at risk
Amphibians are at risk due to a variety of factors, including habitat loss, climate change, disease, and pollution. Habitat loss is caused by human activities such as deforestation, urban sprawl, and agricultural expansion.
What is Amphibians?Amphibians are vertebrate animals that live both on land and in water. They are cold-blooded, meaning their body temperature is determined by their environment. They have a moist, slimy skin and are usually four-legged. Amphibians go through a metamorphosis, meaning they change from a juvenile aquatic form to an adult terrestrial form. Examples of amphibians include frogs, toads, salamanders, newts and caecilians. Amphibians depend on water to reproduce, as they lay their eggs in water and the larval stages of the species develop in water. Amphibians are important to the environment because they are indicators of environmental health; they absorb pollutants and serve as food for other creatures. They are also essential to the food chain as they eat both plants and animals.
To learn more about Amphibians
https://brainly.com/question/27882272
#SPJ1
A chemist weighed out 21.6 g of beryllium. Calculate the number of moles of beryllium she weighed out.
Answer:
2.4 mols Be
Explanation:
Use Molar Mass of Be: 9.0g
21.6gBe x 1mol/9.0g = 2.4 mols Be
What properties could you use to distinguish metals from non-metals?
Metals may be easily molded and bent without breaking because they are malleable and ductile.
By comparing their physical and chemical characteristics, metals and non-metals may be easily identified from one another.
Metals effectively conduct heat and electricity.
Metals often react with water and acids to create basic solutions, and they also produce positive ions in an aqueous solution, according to their chemical characteristics.
Contrarily, non-metals are neither ductile nor malleable, and they have low conductivity for both heat and electricity.
When they interact with water or acids, they can also produce neutral or acidic solutions, as well as negative ions in aqueous solutions.
Learn more about the properties of metals and non-metals:
https://brainly.com/question/13874693
#SPJ4
Give the ratio in which hydrogen and oxygen are present in water by volume.
(a) 1:2
(b) 1:1
(c) 2:1
(d) 1:8
The ratio of the hydrogen and oxygen present in water by volume is 2:1
Ratio of hydrogen to oxygen in water?The ratio of hydrogen to oxygen in water is 2:1. This means that for every two hydrogen atoms in a water molecule, there is one oxygen atom. The chemical formula for water is H2O, which indicates that each water molecule contains two hydrogen atoms and one oxygen atom.
This ratio is essential to the chemical properties of water, including its ability to form hydrogen bonds, dissolve many substances, and participate in a wide range of chemical reactions.
Learn more about water:https://brainly.com/question/28465561
#SPJ1
Is alchemy a real science? In three to five sentences, explain your answer.
Alchemy is not real science. Unlike real science, Alchemy does not utilize all parts of the scientific method. Alchemy cannot be tested using experimentation. Data cannot be collected. Other scientists cannot repeat procedures and get the same results.
Alchemy is not a real science. Alchemy is best described as form of 'proto-science' rather than distinct science in its own right.
What is alchemy?Alchemists throughout the ages sought to harness power of nature through scientific intervention, often implementing it to artistic effect. In medieval Europe, alchemy was referred as “The Great Art.”
Alchemy is described as form of 'proto-science' rather than distinct science because, although many observations and theories made by alchemists were based on scientific fact, they often explained these in terms of divine intervention.
Alchemical practice began about 1,500 years ago in Hellenistic Greece and it came to Europe by way of Middle East. Like the word algebra, alchemy has its Arabic influences in its name. Alchemy flourished in Europe between 13th and 18th centuries.
To know more about alchemy, refer
https://brainly.com/question/17199784
#SPJ1
C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g)
If 45.6g of benzene (C6H6) reacts completely with the chlorine gas (Cl2), how many atoms of hydrochloric acid will be produced
Answer:
45.6g ÷ 78g/mol = 0.58mol (C6H6)
1mol (C6H6) = 1mol (HCl)
HCl = 0.58mol
0.58mol × 6.022×10^23
=......atoms
Explanation:
Find the number of moles (HCl)
Multiply the number of moles produced by the avogadro's number and get the number of atoms produced.
3.51 x 10²³ atoms of hydrochloric acid (HCl) will be produced.
What is Balanced Chemical Equation?
A balanced chemical equation is a representation of a chemical reaction using chemical formulas and coefficients that shows the relative amounts of reactants and products involved in the reaction. The coefficients are used to balance the number of atoms of each element on both the reactant and product sides of the equation, ensuring that the law of conservation of mass is satisfied. A balanced chemical equation also provides information about the stoichiometry of the reaction, including the mole ratios between reactants and products.
The balanced chemical equation is:
C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g)
From the equation, it is clear that 1 mole of benzene (C6H6) reacts with 1 mole of chlorine gas (Cl2) to produce 1 mole of hydrochloric acid (HCl).
First, we need to calculate the number of moles of benzene (C6H6) in 45.6g:
moles of C6H6 = mass of C6H6 / molar mass of C6H6
moles of C6H6 = 45.6 g / 78.11 g/mol
moles of C6H6 = 0.5839 mol
Since 1 mole of benzene (C6H6) produces 1 mole of hydrochloric acid (HCl), the number of moles of hydrochloric acid (HCl) produced is also 0.5839 mol.
To convert the number of moles of hydrochloric acid (HCl) to the number of atoms of hydrochloric acid (HCl), we need to use Avogadro's number:
number of atoms of HCl = moles of HCl x Avogadro's number
number of atoms of HCl = 0.5839 mol x 6.022 x 10²³/mol
number of atoms of HCl = 3.51 x 10²³ atoms
Therefore, 3.51 x 10²³ atoms of hydrochloric acid (HCl) will be produced.
Learn more about Balanced Chemical Equation from given link
https://brainly.com/question/11904811
#SPJ1
A person expanded 500 newtons to move a full wheelbarrow 30 meters. how much work was done?
A reaction has an enthalpy change of − 71 kJ mol − 1 and an entropy change of − 58 J K − 1 mol − 1 . At what temperature does this exothermic reaction cease to be spontaneous?
To determine the temperature at which an exothermic reaction ceases to be spontaneous, we need to calculate the Gibbs free energy change (ΔG) and use the equation ΔG = ΔH - TΔS.
Given that ΔH = -71 kJ/mol and ΔS = -58 J/K·mol, we can calculate ΔG at different temperatures to determine the temperature at which the reaction becomes non-spontaneous.
At a temperature of 0 K, ΔG = ΔH, since TΔS = 0. Thus, ΔG = -71 kJ/mol.
As the temperature increases, TΔS becomes more negative, which means that ΔG becomes more negative, making the reaction more spontaneous.
At a certain temperature, however, ΔG will become positive, which means that the reaction is no longer spontaneous and will not proceed on its own. This temperature can be found by rearranging the equation ΔG = ΔH - TΔS to T = ΔH / ΔS, and substituting the known values for ΔH and ΔS:
T = ΔH / ΔS = -71 kJ/mol / (-58 J/K·mol) = 1230 K
So, the reaction will cease to be spontaneous at a temperature of approximately 1230 K.
if 3.907g of carbon combines completely with 0.874g of hydrogen to form a compound, what is the percent composition of this compound?
The composition of the compound is 12%hydrogen and 56% carbon.
Is hydrogen a liquid or a gas?The lightest element is hydrogen. At room temperature and pressure, hydrogen is a gas, but at -423 degrees Fahrenheit, or -253 degrees Celsius, it condenses to a liquid.
What are the benefits of hydrogen?Many additional applications exist for hydrogen. The Haber process is used in the chemical industry to produce cyclohexane and alcohol, that are intermediates in the creation of polymers and medicines, as well as ammonia for agricultural fertilizer. In the course of the oil-refining process, it is also employed to remove sulfur in fuels.
Divide the amount of the each component by the overall number of constituent components in the compound to get the percentage composition, and multiply this result by 100.
mass of C present in compound= 3.907g
mass of H present in compound= 0.847g
The total mass of the compound = 7g
% of C = 3.907 / 7 × 100 = 55.81 ≅ 56%
% of H = 0.847 / 7 × 100 = 12.1 ≅ 12%.
To know more about hydrogen visit:
https://brainly.com/question/28937951
#SPJ1
Do you or anyone you know follow more than one calendar system? Which ones?
Some people do follow more than one calendar system to know some particular days, month or something based on their rituals and religions.
What is world accepted calendar system ?The world accepted calendar system is Christian calendar. There are different calendar systems in use in the present era such as Chinese calendar, Ethiopian calendar, Jewish calendar etc.
Each calendars have their own peculiarities in use and in the determination of days, months or the identifying any special day. There are some people using more than one calendar system.
For example, some are using religious calendars such as 'hijra ', 'Saka Varsha ' etc. to know some special days based on their cultural rituals.
Find more on calendar system:
https://brainly.com/question/13020126
#SPJ9
A balloon has a pressure of 56mmHg and is 1.5 L in volume. If the balloon is forced to fill a volume of 0.56L, what is the pressure of the ballon (in atm)? Assume constant temp. (Boyle's Law). 15 points pls help
calculate the moles of ammonia present in a 2.860 g sample of ammonia, which has a molar mass of 17.030 g/mol.
The moles of ammonia present in a 2.860 g sample of ammonia has a molar mass of 17.030 g/mol. Then, the Number of Moles is 0.2 moles.
Ammonia :
Ammonia is an inorganic compound of nitrogen and hydrogen with the chemical formula NH3. A stable binary hydride and the simplest source of hydrogenation, ammonia is a colorless gas with a distinct, pungent odor. Biologically, it is a common nitrogen waste, especially among aquatic organisms, and contributes significantly to the nutrient needs of terrestrial organisms, serving as a precursor to 45% of the world's food and fertilizers.
Molar Mass:
In chemistry, the molar mass (M) of a compound is defined as the ratio between the mass of a sample of that compound and the amount of the substance (measured in moles). Molar mass is a volumetric, not molecular, property of a substance. Molar mass is the average of many instances of a compound that often differ in mass due to the presence of isotopes. Most commonly, molar mass is calculated from standard atomic weights, so it is global average and is a function of the relative isotopic abundance of Earth's constituent atoms. Molar mass is suitable for converting the mass of a substance and the amount of a substance into a mass quantity.
Now,
Given:
Weight in grams, w = 2.860 g
Molar mass, m = 17.030 g/mol
We know,
Number of Moles = Weight(w) / Mole Mass (m)
⇒ n = 2.860/ 17.030
By substituting the values,
⇒ n = 0.1679
≈ n = 0.2 moles.
Thus, the response above is right.
Learn more about Moles:
https://brainly.com/question/26416088
#SPJ4
Approximately how many atoms would be in 0.2 moles of iron? Express this is scientific notation.
Answer: 1.2044 x 10^23 atoms in 0.2 moles of iron.
Explanation: The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which is approximately 6.022 x 10^23 atoms per mole. To find the number of atoms in 0.2 moles of iron, we can use the following steps:
1. Start with the given quantity of moles: 0.2 moles of iron.
2. Multiply the given quantity by Avogadro's number: 0.2 moles x (6.022 x 10^23 atoms/mole).
3. Calculate the product: (0.2 moles) x (6.022 x 10^23 atoms/mole) = 1.2044 x 10^23 atoms.
Therefore, there would be approximately 1.2044 x 10^23 atoms in 0.2 moles of iron.
can you calculate: the volume of base needed to reach an endpoint from buret readings? average volume to endpoint? the molarity of a solution from titration data?
The volume of base needed to reach an endpoint from buret readings is 0.025 L, the molarity of a solution from titration data is 0.088 M
Moles of NaOH at the end point:
Volume used at the end point: 0.02104 L
Molarity of NaOH: 0.1053 M= 0.1053 mol/L
So the average moles of NaOH used on the titration are:
n NaOH= (0.1053 mol/L)*(0.02104 L)
n NaOH= 0.0022 mol
-Number of moles of acetic acid neutralized:
The reaction of neutralization is:
CH3COOH + NaOH -----> CH3COONa + H2O
1mol 1mol 1mol 1mol
The stoichiometric relationship between NaOH and CH3COOH is 1:1 wich meand that the number of moles of NaOH conssumed will be the same njmber of moles of the acid present in solution:
n CH3COOH= (0.0022 mol NaOH)*(1 mol CH3COOH)/(1 mol NaOH)
n CH3COOH= 0.0022 mol
-Molarity of acetic acid:
If you used 25 mL of unknown concentration of acetic acid
V sln CH3COOH= 25 mL *( 1L/1000 mL)= 0.025 L
And if you determined that the number of moles present in 0.025 L is 0.0022 mol, the concentration will be
C CH3COOH= 0.0022mol / 0.025 L
C CH3COOH= 0.088 mol/L = 0.088 M
Learn more about Titration:
https://brainly.com/question/13651332
#SPJ4
Complete question:
Determine Average Volume NaOH to Endpoint 1. For each trial calculate volume NaOH needed to reach the endpoint. Final buret reading, ml - Initial buret reading, mL = Volume NaOH to endpoint, ml 2. Identify any outliers (any volume of NaOH that is very different from the rest). Outliers should be omitted in the calculation of the average. 3. Calculate the average volume of NaOH needed to reach the endpoint by summing the volume of NaOH determined for each trail then dividing by the number of trials used in the average. Remember to leave out any outliers.
how many atoms are there in 5.90 moles of calcium
Answer:
3.55x10^24 atoms Ca
Explanation:
Use Avogadro's number: 6.022 x 10^23
5.90molsCa x (6.022x10^23/1mol) = 3.55x10^24
the following minerals are calcite and aragonite. both are composed of caco3, but they look completely different. what would these two minerals be called?
Both calcite and aragonite are made of calcium carbonate. The atomic arrangement in them is entirely different make them appear different. This dissimilarity of minerals with the same formula is called polymorphs.
What is polymorphism ?In mineralogy polymorphism can be defined as existence of two minerals with same chemical composition in different crystal structure. Generally, a crystal's volume will shrink with increasing pressure, and eventually a threshold may be reached where a more compact crystal structure is more stable.
After that, the crystal structure will transition to the more stable form, and a new mineral will exist. The atoms on the crystal structure will similarly tend to vibrate more and grow in size as the temperature rises.
Both calcite and aragonite are calcium carbonate minerals. They exhibit different crystalline structure and they are called polymorphs.
Although one of the two minerals may transition into the other as temperatures and pressures change, calcite is generally more stable than aragonite. Over geologic time, aragonite spontaneously transforms into calcite at surface conditions.
Find more on polymorphs:
https://brainly.com/question/29887429
#SPJ1
use percentages given that the molecular mass of magnesium hydroxide (mg(oh ) 2 ) is 58.32 amu and the atomic mass of an atom of oxygen is 15.999 amu, what percentage of this compound is oxygen?
The percentage of this compound Mg(OH)2 which is oxygen with atomic mass of an atom of oxygen is 15.999 amu is 54.9%.
Percentage by mass is a way of representing the concentration of an element in a compound. It is calculated as the mass of the element divided by the total mass of the compound, multiplied by 100.
%O = 2*16/58.32 x 100 = 54.9%
The percentage of this compound is 54.9%
% Mg=24.30 /58.32×100%
=41.67%
% O=32.00 /58.32×100%
=54.87%
% H =2.016 /58.32×100%
=3.457%
The infinitesimal mass of an element is defined as the sum of the mass of the total number of protons and neutrons in an snippet. It's expressed as amu. For one operative of an element, the infinitesimal mass is expressed in g/ spook.
Learn more about Percentage of compound:
https://brainly.com/question/14255010
#SPJ4
what is/are the diagnostic signal(s) in the ir spectrum of the indanol product that suggests that the desired product is being formed? is it possible to tell whether any unreacted starting material is present?
The presence of a hydroxyl group (OH) stretching at around 3300–3500 cm-1 and a carbonyl group (C=O) stretching at about 1700–1750 cm-1 are two diagnostic signal indications in the IR spectrum of the indanol product that point to the formation of the intended product.
Diagnostic signals are distinct traits that can be utilised to determine if a molecule, functional group, or physical attribute is present or absent in a spectrum or analysis. Diagnostic signals are signals that are specific to a certain chemical structure or bond, allowing for the identification of the compound or the presence of specific functional groups, in the context of spectroscopy. These signals can be utilised to locate and measure the target molecule or functional group because they are frequently connected to certain peaks, wavelengths, or frequencies. Chemical analysis frequently relies on diagnostic signals because they make it possible to precisely and accurately identify certain substances or functional groups in intricate combinations.
Learn more about diagnostic signal here:
https://brainly.com/question/28203089
#SPJ4
