A-- 1.25 cubic inch (in3) sample of glycerol has a mass of 25.2grams. What is the mass of a 57-mL sample of glycerol?
b---The pressure of the earth's atmosphere at sea level is 14.7lb/in2 (pounds per square inch). What is the pressure whenexpressed in g/m2 (grams per square meter)? (2.54 cm = 1 in., 2.205lb = 1 kg)
c---Solid calcium oxide is reacted with solid carbon to formcalcium carbide (CaC2) and carbon dioxide.
Write a balanced chemical equation that describes this reaction.(3 points)
If the reaction is carried out using 100.00 grams of calciumoxide and 100.00 g of carbon, how many moles of each reactant areused? (2 points)
d---Ammonium sulfate is primarily used as a fertilizer foralkaline solids. In the soil the ammonium ion is released and formsa small amount of acid, lowering the pH balance of the soil, whilecontributing essential nitrogen for plant growth.
What is the chemical formula of ammonium sulfate? (1 point)
What is the mass percentage of nitrogen in ammonium sulfate? (2points)
How many moles of ions are released when 13.2 g of ammoniumsulfate is dissolved in water? (2 points)
