Multiple ChoiceIf a sample of sodium chloride, NaCl, contains 73.1 kg, what is its number of formula units?1445views11rank
Multiple ChoiceIf the density of water is 1.00 g/mL at 25°C, calculate the number of water molecules found in 1.50 x 103 µL of water.1469views5rank1comments
Multiple ChoiceA cylindrical copper wire is used for the fences around a house. The copper wire has a diameter of 0.0750 in. How many copper atoms are found in 5.160 cm piece? The density of copper is 8.96 g/cm3. (V = π • r2 • h)894views17rank
Multiple ChoiceThe density of the sun is 1.41 g/cm3 and its volume is 1.41 x 1027 m3. How many hydrogen molecules are in the sun if we assume all the mass is hydrogen gas?1003views1rank
Textbook QuestionCalculate the mass, in grams, for each of the following: e. 2.08 moles of (NH₄)₂SO₄392views
Textbook QuestionCalculate the mass, in grams, for each of the following: d. 0.145 mole of C₂H₆O357views
Textbook QuestionCaffeine has the formula C8H10N4O2. If an average cup of coffee contains approximately 125 mg of caffeine, how many moles of caffeine are in one cup?624views
Textbook QuestionFind the mass in atomic mass units of the following: a. 1 O atom, with a mass of 2.66 * 10^-23 g b. 1 Br atom, with a mass of 1.31 * 10^-22 g511views
Textbook QuestionThe principal component of many kidney stones is calcium oxalate, CaC2O4. A kidney stone recovered from a typical patient contains 8.5 x 10^20 formula units of calcium oxalate. How many moles of CaC2O4 are present in this kidney stone? What is the mass of the kidney stone in grams?737views
Textbook QuestionCalcium citrate, Ca(C6H5O7)2(MW = 498.5 amu), is a common dietary supplement to provide calcium needed for strong teeth and bones. What mass of calcium citrate would be needed to provide the recommended daily intake of calcium?597views
Textbook QuestionObtain a bottle of aspirin and identify the amount of active ingredient (acetylsalicylic acid, C9H8O4) per tablet. How many moles of aspirin are in one tablet?327views
Textbook QuestionPyrite, also known as fool's gold, is used commercially to produce SO2 used in the production of paper products. How many moles of SO2 can be produced from 1.0 kg of pyrite?516views
Textbook QuestionUsing the models of the molecules (black = C, white = H, yellow = S, green = Cl), determine each of the following for models of compounds 1 and 2: (7.1, 7.2, 7.3) 1. 2. c. number of moles in 10.0 g323views
Textbook QuestionUsing the models of the molecules (black = C, white = H, yellow = S, red = O) determine each of the following for models of compounds 1 and 2: (7.1, 7.2, 7.3) 1. 2. c. number of moles in 10.0 g395views
Textbook QuestionIbuprofen, an anti-inflammatory drug in Advil, has the formula C₁₃H₁₈O₂ (7.1, 7.2, 7.3) d. How many moles of ibuprofen contain 1.22 x 10²³ atoms of C?708views
Textbook QuestionAmmonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil. (7.1, 7.2) c. How many moles of ammonium sulfate contain 7.4 x 10²⁵ atoms of N?451views
Textbook QuestionAmmonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil. (7.1, 7.2) b. How many H atoms are in 0.100 mole of ammonium sulfate?696views
Textbook QuestionAmmonium sulfate, (NH₄)₂SO₄, is used in fertilizers to provide nitrogen for the soil. (7.1, 7.2) a. How many formula units are in 0.200 mole of ammonium sulfate?303views
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