Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
13th Edition
ISBN: 9780134421353
Author: Karen C. Timberlake
Publisher: PEARSON
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Textbook Question
Chapter 7.3, Problem 7.27PP
Calculate the number of moles in 25.0 g of each of the following:
a. He
b.
c.
d.
e.
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1. The number of atoms in 2.0 mol of nitrogen gas, N2, is:
a.
1.8 x 1024
b.
2.4 x
1025
c.
1.2 x 1024
d.
2.4 x 1024
e. 4.0 x 1023
2. The molar mass of a compound with the empirical formula CH₂O has a mass of approximately 90
g. What is the molecular formula of the compound?
a. C4H₂O4
b. C₂H6O₂
c. C₂H₂O6
d. CzH6O3
€. CHO
3. A sample of hexane, C6H₁4, contains 3.0 x 1023 molecules of hexane. How many atoms are in the
sample?
a. 36 x 1024
b. 1.8 x 1023
c. 3.6 x 1024
d.
6.0 x 1024
e. 3.0 x 1023
4. Examine the following formulas. Which formula is an empirical formula?
a. C₂H4
b. CsHo
C. CH₂
d. C₂H₂
e. H₂O₂
5. What is the molar mass of ammonium sulfite?
a. 116.12g/mol
b. 68.17g/mol
c. 50.12g/mol
d. 132.17g/mol
A chemical compound is analyzed for its elemental composition, and is found to contain 57.14% carbon, 4.80% hydrogen, and 38.06% oxygen. The empirical formula for this chemical compound is:
A.
C2H2O
B.
CH2O
C.
C2H4O
D.
C2H4O2
E.
C4H6O
A 1.375 g sample of mannitol, a sugar found in seaweed, is burned completely in oxygen to give
1.993 g of carbon dioxide and 0.9519 g of water. The empirical formula of mannitol is
Select one:
a. C,H,03
b. CHO
c. CH,0
d. CH,03
e. C,H,0
Chapter 7 Solutions
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
Ch. 7.1 - What is a mole?Ch. 7.1 - What is Avogadro’s number?Ch. 7.1 - Calculate each of the following: a. number of C...Ch. 7.1 - Calculate each of the following: a. number of Li...Ch. 7.1 - Calculate each of the following quantities in 200...Ch. 7.1 - Calculate each of the following quantities in...Ch. 7.1 - Quinine, C20H24N2O2 , is a component of tonic...Ch. 7.1 - Aluminum sulphate, Al2SO43 , is used in some...Ch. 7.1 - Naproxen, found in Aleve, is used to treat the...Ch. 7.1 - Benadryl is an over-the-counter drug used to treat...
Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.2 - Calculate the molar mass for each of the...Ch. 7.3 - Calculate the mass, in grams, for each of the...Ch. 7.3 - Calculate the mass, in grams, for each of the...Ch. 7.3 - Calculate the mass, in grams, in 0.150 mole of...Ch. 7.3 - Calculate the mass, in grams, in 2.28 moles of...Ch. 7.3 - Calculate the number of moles in each of the...Ch. 7.3 - Calculate the number of moles in each of the...Ch. 7.3 - Calculate the number of moles in 25.0 g of each of...Ch. 7.3 - Calculate the number of moles in 4.00 g of each of...Ch. 7.3 - Chloroethane, C2H5Cl , is used to diagnose dead...Ch. 7.3 - Allyl sulfide, C3H52S , gives garlic, onions, and...Ch. 7.3 - a. The compound MgSO4 , Epsom salts, is used to...Ch. 7.3 - a. Cyclopropane, C3H6 , is an anesthetic given by...Ch. 7.3 - Dinitrogen oxide (or nitrous oxide), N2O , also...Ch. 7.3 - Chloroform, CHCl3 , was formerly used as an...Ch. 7.4 - Determine whether each of the following chemical...Ch. 7.4 - Determine whether each of the following chemical...Ch. 7.4 - Balance each of the following chemical equations:...Ch. 7.4 - Balance each of the following chemical equations:...Ch. 7.4 - Balance each of the following chemical equations:...Ch. 7.4 - Balance each of the following chemical equations:...Ch. 7.5 - Prob. 7.41PPCh. 7.5 - Prob. 7.42PPCh. 7.5 - Prob. 7.43PPCh. 7.5 - Prob. 7.44PPCh. 7.6 - Prob. 7.45PPCh. 7.6 - Prob. 7.46PPCh. 7.6 - In each of the following, identify the reactant...Ch. 7.6 - In each of the following, identify the reactant...Ch. 7.6 - Prob. 7.49PPCh. 7.6 - Prob. 7.50PPCh. 7.6 - Prob. 7.51PPCh. 7.6 - Prob. 7.52PPCh. 7.7 - Write all of the mole—mole factors for each of the...Ch. 7.7 - Write all of the mole—mole factors for each of the...Ch. 7.7 - The chemical reaction of hydrogen with oxygen...Ch. 7.7 - Ammonia is produced by the chemical reaction of...Ch. 7.7 - Carbon disulfide and carbon monoxide are produced...Ch. 7.7 - In the acetylene torch, acetylene gas C2H2 burns...Ch. 7.8 - Sodium reacts with oxygen to produce sodium oxide....Ch. 7.8 - Nitrogen gas reacts with hydrogen gas to produce...Ch. 7.8 - Ammonia and oxygen react to form nitrogen and...Ch. 7.8 - Iron(III) oxide reacts with carbon to give iron...Ch. 7.8 - Nitrogen dioxide and water react to produce nitric...Ch. 7.8 - Calcium cyanamide, CaCN2 , reads with water to...Ch. 7.8 - When solid lead(II) sulfide reacts with oxygen...Ch. 7.8 - When the gases dihydrogen sulfide and oxygen...Ch. 7.9 - Prob. 7.67PPCh. 7.9 - a. What is measured by the heat of reaction? b. In...Ch. 7.9 - Classify each of the following as exothermic or...Ch. 7.9 - Classify each of the following as exothermic or...Ch. 7.9 - Classify each of the following as exothermic or...Ch. 7.9 - Classify each of the following as exothermic or...Ch. 7.9 - a. What is meant by the rate of a reaction? b. Why...Ch. 7.9 - a. How does a catalyst affect the activation...Ch. 7.9 - Prob. 7.75PPCh. 7.9 - How would each of the following change the rate of...Ch. 7.9 - a. During cellular respiration, aqueous C6H12O6...Ch. 7.9 - Fatty acids undergo reaction with oxygen gas and...Ch. 7 - Prob. 7.79UTCCh. 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. 7.83UTCCh. 7 - Balance each of the following by adding...Ch. 7 - Prob. 7.85UTCCh. 7 - Prob. 7.86UTCCh. 7 - If blue spheres represent nitrogen atoms, purple...Ch. 7 - Prob. 7.88UTCCh. 7 - Prob. 7.89UTCCh. 7 - Prob. 7.90UTCCh. 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. 7.99APPCh. 7 - Prob. 7.100APPCh. 7 - Identify each of the following as an oxidation or...Ch. 7 - Identify each of the following as an oxidation or...Ch. 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. 7.106APPCh. 7 - Prob. 7.107APPCh. 7 - The equation for the formation of nitrogen oxide...Ch. 7 - Prob. 7.109CPCh. 7 - Prob. 7.110CPCh. 7 - Prob. 7.111CPCh. 7 - A toothpaste contains 0.240% by mass sodium...Ch. 7 - Prob. 7.113CPCh. 7 - Prob. 7.114CPCh. 7 - Prob. 7.115CPCh. 7 - Prob. 7.116CP
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