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Problem 63d
Refer to the nomenclature flowchart (Figure 3.11) to name each compound. d. HC2H3O2(aq)
Problem 65c
Refer to the nomenclature flowchart (Figure 3.11) to name each compound. a. KClO3 b. I2O5 c. PbSO4
Problem 66b
Refer to the nomenclature flowchart (Figure 3.11) to name each compound. a. XeO3 b. KClO
Problem 66c
Refer to the nomenclature flowchart (Figure 3.11) to name each compound. c. CoSO4
Problem 67c
Calculate the formula mass for each compound. c. H2SO4
Problem 68a
Calculate the formula mass for each compound. a. N2O4
Problem 72a
Determine the number of moles (of molecules or formula units) in each sample. a. 55.98 g CF2Cl2
Problem 72b
Determine the number of moles (of molecules or formula units) in each sample. b. 23.6 kg Fe(NO3)2
Problem 72c
Determine the number of moles (of molecules or formula units) in each sample. c. 0.1187 g C8H18
Problem 72d
Determine the number of moles (of molecules or formula units) in each sample. d. 195 kg CaO
Problem 73a
How many molecules are in each sample? a. 55.9 g Cl2
Problem 73b
How many molecules are in each sample? b. 12.1 kg K2CO3
Problem 74
How many molecules (or formula units) are in each sample? a. 67.9 g H2O b. 112 mg NaPO4 c. 32.1 kg C6H12O d. 56.1 g N2
Problem 75a
Calculate the mass (in g) of each sample. a. 5.94×1020 SO3 molecules b. 2.8×1022 H2O molecules c. 1 glucose molecule (C6H12O6)
Problem 76a
Calculate the mass (in g) of each sample. a. 4.5×1025 O3 molecules
Problem 76b
Calculate the mass (in g) of each sample. b. 9.85×1019 CCl2F2 molecules c. 1 water molecule
Problem 77
A salt crystal has a mass of 0.27 mg. How many NaCl formula units does it contain?
Problem 78
A sugar crystal contains approximately 6.55 * 1017 sucrose (C12H22O11) molecules. What is its mass in mg?
Problem 79a
Calculate the mass percent composition of carbon in each carbon-containing compound. a. CH4 b. C2H6
Problem 79c
Calculate the mass percent composition of carbon in each carbon-containing compound. c. C2H2
Problem 79d
Calculate the mass percent composition of carbon in each carbon-containing compound. d. C2H5Cl
Problem 80a
Calculate the mass percent composition of nitrogen in each nitrogen-containing compound. a. N2O b. NO
Problem 80c
Calculate the mass percent composition of nitrogen in each nitrogen-containing compound. c. NO2
Problem 81
Most fertilizers consist of nitrogen-containing compounds such as NH3, CO(NH2)2, NH4NO3, and (NH4)2SO4. Plants use the nitrogen content in these compounds for protein synthesis. Calculate the mass percent composition of nitrogen in CO(NH2)2.
Problem 82
Iron in the earth is in the form of iron ore. Common ores include Fe2O3 (hematite), Fe3O4 (magnetite), and FeCO3 (siderite). Calculate the mass percent composition of iron for each of these iron ores. Which ore has the highest iron content?
Problem 83
Silver chloride, often used in silver plating, contains 75.27% Ag by mass. Calculate the mass of silver chloride required to plate 123 mg of pure silver.
Problem 84
Copper(II) fluoride contains 37.42% F by mass. Calculate the mass of fluorine (in g) in 23.8 g of copper(II) fluoride.
Problem 85
The iodide ion is a dietary mineral essential to good nutrition. In countries where potassium iodide is added to salt, iodine deficiency (or goiter) has been almost completely eliminated. The recommended daily allowance (RDA) for iodine is 150 mg/day. How much potassium iodide (76.45% I) should you consume if you want to meet the RDA?
Problem 86
The American Dental Association recommends that an adult female should consume 3.0 mg of fluoride (F-) per day to prevent tooth decay. If the fluoride is consumed in the form of sodium fluoride (45.24% F), what amount of sodium fluoride contains the recommended amount of fluoride?
Problem 87a
Write a ratio showing the relationship between the molar amounts of each element for each compound. (See Appendix IIA for color codes.) (a)
