C K2O and H2 D KOH and H2 Consider this reaction: 3Ca (s) (aq) (s) (g) How many moles of calcium are required to produce 60.0 g of calcium phosphate? A 0.145 mole B 0.194 mole C 0.387 mole D 0.581 mole 12/13/13 Methane (CH is combusted/burned in oxygen according to this balanced chemical 4) equation: CH4 (g) 2O2 (g) CO2 (g) 2H2O (g) → + + What volume of carbon dioxide is formed when 9.36 liters of methane are burned in excess oxygen at STP? A 9.36 L B 15.0 L C 18.7 L D 22.4 L 12/16/13 Which set of equipment would be most useful to determine the density of a liquid? A Balance and periodic table B Periodic table and graduated cylinder C Balance and graduated cylinder D Graduated cylinder and thermometer What is the volume of the liquid in the graduated cylinder? A 13.00 mL B 13.50 mL C 14.00 mL D 14.50 mL A student is given a container of potassium nitrate crystals. In order to determine the exact mass of the potassium nitrate using a triple beam balance, he must know the — A mass of the filled container and the chemical formula for potassium nitrate B mass of the filled container and the density of potassium nitrate C volume of the filled container and the volume of the potassium nitrate D mass of the empty container and the mass of the filled container 12/18/13 Iodine-131 is a radioactive isotope with a half-life of 8 days. How many grams of a 64 g sample of iodine-131 will remain at the end of 24 days? Copper sulfide is formed when copper and sulfur are heated together. In this reaction, 127 grams of copper reacts with 41 g of sulfur. After the reaction is complete, 9 g of sulfur remains unreacted. What is the mass of copper sulfide formed?
C K2O and H2 D KOH and H2 Consider this reaction: 3Ca (s) (aq) (s) (g) How many moles of calcium are required to produce 60.0 g of calcium phosphate? A 0.145 mole B 0.194 mole C 0.387 mole D 0.581 mole 12/13/13 Methane (CH 4) is combusted/burned in oxygen according to this balanced chemical equation: CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g) What volume of carbon dioxide is formed when 9.36 liters of methane are burned in excess oxygen at STP? A 9.36 L B 15.0 L C 18.7 L D 22.4 L 12/16/13 Which set of equipment would be most useful to determine the density of a liquid? A Balance and periodic table B Periodic table and graduated cylinder C Balance and graduated cylinder D Graduated cylinder and thermometer What is the volume of the liquid in the graduated cylinder? A 13.00 mL B 13.50 mL C 14.00 mL D 14.50 mL A student is given a container of potassium nitrate crystals. In order to determine the exact mass of the potassium nitrate using a triple beam balance, he must know the — A mass of the filled container and the chemical formula for potassium nitrate B mass of the filled container and the density of potassium nitrate C volume of the filled container and the volume of the potassium nitrate D mass of the empty container and the mass of the filled container 12/18/13 Iodine-131 is a radioactive isotope with a half-life of 8 days. How many grams of a 64 g sample of iodine-131 will remain at the end of 24 days? Copper sulfide is formed when copper and sulfur are heated together. In this reaction, 127 grams of copper reacts with 41 g of sulfur. After the reaction is complete, 9 g of sulfur remains unreacted. What is the mass of copper sulfide formed?
HS_Chem_Unit4_Stoichiometry_Interactive_Notebookl_2013-2014_102013.docx