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Chapter 7, Problem 7.71UTC
Interpretation Introduction

To determine:

Molecular formula, molar mass and number of moles in 10 g of given compounds.

Expert Solution & Answer
Check Mark

Answer to Problem 7.71UTC

Compound 1:

Molecular formula  Molar mass  Number of moles in 10 g

S2Cl2   135.06 g/ mol  0.074054 mol

Compound 2:

Molecular formula  Molar mass  Number of moles in 10 g

C6H6   78.066 g/ mol  0.1281 mol

Explanation of Solution

Given:

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Books a la Carte Edition & Modified MasteringChemistry with Pearson eText -- ValuePack Access Card Package, Chapter 7, Problem 7.71UTC , additional homework tip  1

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Books a la Carte Edition & Modified MasteringChemistry with Pearson eText -- ValuePack Access Card Package, Chapter 7, Problem 7.71UTC , additional homework tip  2

a. Formula of a chemical species is given by AoB,

where A, B are the symbols of the elements, o and l are the number of A and B elements in the molecule.

Here, in first compound, o = 2, l = 2 and in second compound o = 6, l = 6. So, formulas are S2Cl2 and C6H6.

Formula used:

b. Molar mass of a compound,

AoB= o×Atomic Mass of A + l× Atomic  Mass of B        - (1)

c. The number of moles, n

n=(Mass of substancein grams)(MolarMass in g/mol) - (2)

Calculation:

b. Using equation (1), Molar mass of S2Cl2 = 2× 32.065 + 2×35.453 = 135.036 g/ mol

Molar mass of C6H6 = 6×12.011 + 1×6 = 78.066 g/ mol

Using equation (2),

Number of moles of S2Cl2 in 10 g = 10g135.036g/mol=0.074054mol

Number of moles of C6H6 in 10 g = 10g78.066g/mol=0.1281mol

Conclusion

Molecular formula of compound,1 = S2Cl2, molar mass=135.036 g/ mol and number of moles in 10 g of substance is 0.074054 mol.

Molecular formula of compound, 2 = C6H6, molar mass= 78.066 g/ mol and number of moles in 10 g of substance = 0.1281 mol.

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Chapter 7 Solutions

Chemistry: An Introduction to General, Organic, and Biological Chemistry, Books a la Carte Edition & Modified MasteringChemistry with Pearson eText -- ValuePack Access Card Package

Ch. 7.2 - Prob. 7.11QAPCh. 7.2 - Prob. 7.12QAPCh. 7.2 - Prob. 7.13QAPCh. 7.2 - Prob. 7.14QAPCh. 7.2 - Prob. 7.15QAPCh. 7.2 - Prob. 7.16QAPCh. 7.2 - Prob. 7.17QAPCh. 7.2 - Prob. 7.18QAPCh. 7.2 - Prob. 7.19QAPCh. 7.2 - Prob. 7.20QAPCh. 7.2 - Prob. 7.21QAPCh. 7.2 - Prob. 7.22QAPCh. 7.2 - Prob. 7.23QAPCh. 7.2 - Prob. 7.24QAPCh. 7.2 - Prob. 7.25QAPCh. 7.2 - Prob. 7.26QAPCh. 7.3 - Determine whether each of the following chemical...Ch. 7.3 - Determine whether each of the following chemical...Ch. 7.3 - Balance each of the following chemical equations:...Ch. 7.3 - Balance each of the following chemical equations:...Ch. 7.3 - Balance each of the following chemical equations:...Ch. 7.3 - Balance each of the following chemical equations:...Ch. 7.4 - Prob. 7.33QAPCh. 7.4 - Prob. 7.34QAPCh. 7.4 - Prob. 7.35QAPCh. 7.4 - Prob. 7.36QAPCh. 7.4 - Prob. 7.37QAPCh. 7.4 - Prob. 7.38QAPCh. 7.5 - Prob. 7.39QAPCh. 7.5 - Prob. 7.40QAPCh. 7.5 - In each of the following, identify the reactant...Ch. 7.5 - In each of the following, identify the reactant...Ch. 7.5 - Prob. 7.43QAPCh. 7.5 - Prob. 7.44QAPCh. 7.5 - Prob. 7.45QAPCh. 7.5 - Prob. 7.46QAPCh. 7.6 - Write all of the mole—mole factors for each of the...Ch. 7.6 - Write all of the mole—mole factors for each of the...Ch. 7.6 - The chemical reaction of hydrogen with oxygen...Ch. 7.6 - Prob. 7.50QAPCh. 7.6 - Carbon disulfide and carbon monoxide are produced...Ch. 7.6 - Prob. 7.52QAPCh. 7.7 - Sodium reacts with oxygen to produce sodium oxide....Ch. 7.7 - Nitrogen gas reacts with hydrogen gas to produce...Ch. 7.7 - Ammonia and oxygen react to form nitrogen and...Ch. 7.7 - Iron(III) oxide reacts with carbon to give iron...Ch. 7.7 - Nitrogen dioxide and water react to produce nitric...Ch. 7.7 - Calcium cyanamide, CaCN2 , reads with water to...Ch. 7.7 - Prob. 7.59QAPCh. 7.7 - When the gases dihydrogen sulfide and oxygen...Ch. 7.8 - Prob. 7.61QAPCh. 7.8 - Prob. 7.62QAPCh. 7.8 - Classify each of the following as exothermic or...Ch. 7.8 - Classify each of the following as exothermic or...Ch. 7.8 - Classify each of the following as exothermic or...Ch. 7.8 - Classify each of the following as exothermic or...Ch. 7.8 - a. What is meant by the rate of a reaction? b. Why...Ch. 7.8 - a. How does a catalyst affect the activation...Ch. 7.8 - Prob. 7.69QAPCh. 7.8 - How would each of the following change the rate of...Ch. 7 - Prob. 7.71UTCCh. 7 - Using the models of the molecules (black = C,...Ch. 7 - A dandruff shampoo contains dipyrithione,...Ch. 7 - Ibuprofen, an anti-inflammatory drug in Advil, has...Ch. 7 - Prob. 7.75UTCCh. 7 - Balance each of the following by adding...Ch. 7 - Prob. 7.77UTCCh. 7 - Prob. 7.78UTCCh. 7 - If blue spheres represent nitrogen atoms, purple...Ch. 7 - Prob. 7.80UTCCh. 7 - Prob. 7.81UTCCh. 7 - Prob. 7.82UTCCh. 7 - Calculate the molar mass for each of the...Ch. 7 - Calculate the molar mass for each of the...Ch. 7 - How many grams are in 0.150 mole of each of the...Ch. 7 - How many grams are in 2.25 moles of each of the...Ch. 7 - How many moles are in 25.0 g of each of the...Ch. 7 - How many moles are in 4.00 g of each of the...Ch. 7 - Identify the type of reaction for each of the...Ch. 7 - Identify the type of reaction for each of the...Ch. 7 - Prob. 7.91AQAPCh. 7 - Prob. 7.92AQAPCh. 7 - Prob. 7.93AQAPCh. 7 - Prob. 7.94AQAPCh. 7 - Identify each of the following as an oxidation or...Ch. 7 - Prob. 7.96AQAPCh. 7 - When ammonia NH3 gas reacts with fluorine gas, the...Ch. 7 - When nitrogen dioxide NO2 gas from car exhaust...Ch. 7 - Pentane gas, C5H12 undergoes combustion with...Ch. 7 - Prob. 7.100AQAPCh. 7 - Prob. 7.101AQAPCh. 7 - The equation for the formation of nitrogen oxide...Ch. 7 - Prob. 7.103CQCh. 7 - Prob. 7.104CQCh. 7 - Prob. 7.105CQCh. 7 - A toothpaste contains 0.240% by mass sodium...Ch. 7 - Prob. 7.107CQCh. 7 - Prob. 7.108CQCh. 7 - Prob. 7.109CQCh. 7 - Prob. 7.110CQ
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