37. Calculate the mass in grams of each of the following samples. a. 0.251 mole of ethyl alcohol, C2 H6 O b. 1.26 moles of carbon dioxide c. 9.31 x 10-4 moles of gold(III) chloride d. 7.74 moles of sodium nitrate e. 0.000357 mole of iron

Q: Which of the following has the most moles of substance? a. 10.0 g He b. 5.0 x 10²³ atoms Ne c.…

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Q: 48. How many molecules of caffeine, C4HSN2O, are there in 18 g of caffeine? a. 1.12 ×10E23 b. 1.05…

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Q: The composition of a commercial cold remedy mixture is 87% aspirin, 7% caffeine, 6% vitamin C. What…

A: Mass of mixture that contains 5 g Caffeine = ? % of aspirin = 87 % % of caffeine = 7% % of vitamin C…

Q: name each of the following molecular compounds a. N2O5 b. SeO2 c. RnF2 d.Si3N4

A: Since you have posted multiple questions, we are entitled to answer the first only. And since the…

Q: The empirical formula of a group of elements is:      a. The simplest whole number ratio of atoms…

A: Empirical formula of any compound is defined as the simplest whole number ratio of atoms present in…

Q: 1. How many moles are present in 24.0 grams of Sb,S,? a. 1.31x10 mol b. 1.56x10 mol c. 5.94x10 mol…

A: (1) Number of moles of Sb2S5 can be determined by using the formula given below as: Moles of…

Q: : How many atoms of oxygen are in 3.52 moles of calcium nitrate? A. 1.91 x 10^25 atoms O B. 2.12 x…

A: E. 1.27×1025 atoms of Oxygen Given that,  Moles of Ca(NO3)2   = 3.52 mol Moles of Oxygen in 3.52 mol…

Q: 41.  0.8 moles of ferrous phosphate contains how many oxygen atoms?   A. 3.2 x 1024      B.…

A:

Q: Morphine (molar mass = 285.37 g/mol) is a narcotic %3D painkiller. How many moles of morphine are…

A: We know that : moles = weight of substance/molecular weight of substance  Or, moles (n) = weight…

Q: QUESTION 2 a. How many moles of Al203 are in 28.0 g of Al203? Report your answer to the correct…

A:

Q: 24. Select the correct statement below. The percent composition (by mass) is the same for each…

A: The statements which are correct are, A) The percent composition (by mass) is the same for each…

Q: 27. A compound is 75.7% arsenic and 24.3% oxygen by mass. empirical formula? 75.7 What is the

A: Given, mass of arsenic(As) = 75.7 % = 75.7 g mass of oxygen(O) = 24.3 % = 24.3 g

Q: pure density liquid A. 31. What is the density of a mixture that is 2.3 moles A and 2.7 moles B?…

A:

Q: Suppose that a compound containing copper and chlorine contains 0.01139 moles of copper and 0.03813…

A: According to the question:  moles of copper in compound = 0.01139 moles moles of chlorine in…

Q: What is the mass in grams per mole?

A: Information about the question

Q: moles

A:

Q: You have a beaker containing 325.9mL of H2O and 14.55g of CaBr2. Calculate the mass percent.

A: Mass percentage ( % w/W ) :  mass of solute in grams present in 100 mL of solution is called mass…

Q: An unknown compound comprised of osmium and chlorine is 40.11% osmium by mass. a. If you assume…

A: Hello. Since the question contains more than three sub-parts, the first three sub-parts shall be…

Q: Calculate the number of atoms of silver that are in 0.212 moles of silver. (Avogadro's number = 6.02…

A: Avogadro’s number, one mole of any substance (defined as its molecular weight in grams), is equal to…

Q: 9.to convert from moles of A to grams of A you use the ___________ a.Molar Mass b.Mass Ratio c.Mole…

A:

Q: Mass of product…

A: Number of moles is defined as the amount of the substance divided by the molecular weight of the…

Q: How do you convert the following number of atoms to moles and moles to atoms as needed to get a, b,…

A: we know  that  n=no of molecules or atoms/NA NA = 6.023 ×10 23

Q: Show your complete solution. Write your answer and solution in a clean sheet of paper 1. Consider a…

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

Q: 4. Subtract 3.58 x 10-2 kg from 1.41 x 101 ng and report your answer in g.

A: We know that kilogram, nanogram and gram are the units of mass.

Q: 4.0 g of oxygen contains   A. 0.025 molar masses   B. 4.0 molar masses of oxygen   C. .02 x…

A: Here there is Oxygen atom so atomic mass is 16 g mol-1.

Q: Molar mass is defined as: a. the mass of one mole of a substance in grams. b. the mass of one gram…

A: option a

Q: 20. Which one of the following samples of substances contains the largest number of atoms? Select…

A: 1 mole = 6.022×1023 ( Avogadro's number ) Anything which is in the number of 6.022×1023  is  called…

Q: What is the percent by mass of Cl in the compound? d 0 of 2 points earned 2 attempts remaining What…

A:

Q: How many particles are in 1.80 mol of sulfur trioxide gas? O a. 144 O b. 115.2 O c. 1440

A: Given information,  1.80 mol sulfur trioxide

Q: 1. Determine the percent composition of the following: a. A scientist analyzes a 50.0g sample and…

A: Here we are required to find the percentage composition.

Q: Draw a formula unit of calcium chloride and use that to determine the chemical formula of the 5.…

A:

Q: The formula for sulfur dioxide is . A. How many molecules are in 2.64 grams of sulfur dioxide?…

A: The formula for Sulfur dioxide is :                    SO2 Given:For part Agiven mass of SO2…

Q: How many moles of tungsten atoms are in 4.8 x 10^24 atoms in tungsten. a. 8.0x10^0 moles b.…

A: Given: No. of tungsten atoms =  4.8 x 1024 atomsRequired: no. of Moles of tungsten= ?

Q: How many formula units are in 0.761 g of iron(III) nitrate?   A. 1.89 x 1021 f.u.   B. 3.13 x…

A: Interpretation: The amount of formula units are in 0.761 g of iron(III) nitrate is to be calculated.

Q: The formula of cupric sulfate is? A. Cu(SO4)2 B. CuSO3 C. CuSO4 D. Cu(SO3)2 Q2: A silicon chip has a…

A: Cupric means copper in +2 oxidation state and the chemical formula of sulphate ion is SO42-

Q: Suppose that a compound containing copper and chlorine contains 0.01044 moles of copper and 0.01517…

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Q: A molecule contains only carbon and hydrogen. The percent hydrogen is 27.45 %. Determine the…

A: The emperical formula of the compound is given below

Q: Find the mass of 1 molecule of NH; in gram. a. 10 O b. 2.82 x1023 O c. 2.82 x10-23 O d. 17

A: According to the mole concept, one mole of any substance related as - (1) 1 mole of the Substance =…

Q: 9. An unknown compound, X, is 63.56% Carbon, 6% Hydrogen, 9.26% Nitrogen and 21.17% Oxygen. a. Find…

A:

Q: how many moles of hydrogen gas is generated per mole of zinc that reacts with hydrochloric acid? A.…

A: When Zn is reaction with HCl it will release 1 mole of hydrogen  Zn is highly reactive than hydrogen…

Q: 2. Calculate the mass in grams of each of the following samples. a. 25.5 x 1024 nitrogen molecules…

A: Since you have asked for question 2 only, we are providing you a solution for that

Q: How many moles of sulfate ions are contained in 0.420 moles of aluminum sulfate?   A. 0.140 moles…

A: Only 1st question is answered according to the policy

Q: Get the number of moles of the given substances. a. 0.26 g iron, Fe b. 1.50 x 1023 sodium atoms, Na…

A:

Q: How many entities are present in each of the following? a. 8.44 mol argon atoms b. 1.1 x 10-¹2 mol…

A: For any substance, . In all the questions moles are given. Thus, the number of atoms can be…

Q: Calculate the percent by mass of each element in the following compounds. a. Methane, CH4 b.…

A: Percent by mass is simply the ratio of atomic mass of element present in compound to total molar…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.