Students type their answers here 1 Find the formula for the compound that contains 72.40% iron and 27.60% oxygen. Students type their answers here

Students type their answers here Which is the percent composition of phosphorus in Zn3(PO4)2? 16.1 % 9.66 % c. 50.1 % d. 24.01 % 2 Students type their answers here

Students type their answers here 3 Which term is described as the lowest whole-number ratio of elements in a compound? hydrate molecular formula c. empirical formula d. percent composition Students type their answers here

Students type their answers here 4 Which term is described as the percent by mass of any element in a compound? hydrate molecular formula c. empirical formula d. percent composition Students type their answers here

Students type their answers here 5 The mass of each element making up 37.2 grams of a compound were measured. Based on these data, what is the correct formula for the compound? Element: Mass: Magnesium 10.72 g Carbon 5.30 g Oxygen 21.18 g Students type their answers here

Students type their answers here 6 A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate. Students type their answers here

Students type their answers here 7 The empirical formula for a compound is CH2O, and the molar mass is 180.2 g/mol. Which is the molecular formula for this compound? Students type their answers here

Students type their answers here 8 What is the correct name for the hydrate with the following composition? 67.70% FePO4 32.30% H2O Students type their answers here

Students type their answers here 9 Determine the empirical formula for a 100.00-g sample of a compound having the following percent composition. 94.07% sulfur and 5.93% hydrogen Students type their answers here

Students type their answers here 10 A compound was found to contain 49.98 g of carbon and 10.47 g of hydrogen. The molar mass of the compound is 58.12 g/mol. Determine the molecular formula. Students type their answers here

Students type their answers here 11 An 11.75-g sample of a common hydrate of cobalt(II) chloride is heated. After heating, 0.0712 mol of anhydrous cobalt chloride remains. What is the formula and the name for this hydrate? Students type their answers here

Students type their answers here 12 Propane is a hydrocarbon, a compound composed only of carbon and hydrogen. It is 81.82% carbon and 18.18% hydrogen. What is the empirical formula? Students type their answers here

Students type their answers here 13 What is the percent composition of each element in phosphoric acid? Students type their answers here

Students type their answers here 14 What is the percent composition of potassium in potassium sulfate? Students type their answers here