Mystery Mix
This is the branch of chemistry that deals with mass relationships in compounds and reactions.
What is Stoichiometry
This is the coefficient of hydrogen gas in the balanced form of the following reaction:
H2 + O2 --> H2O
What is 2
This is the amount of magnesium chloride produced (in grams) if 20.0 g of magnesium react with excess hydrochloric acid:
Mg + HCl -------> MgCl2 + H2
What is 78.3 grams
This is the ingredient that is the limiting reactant if you have 5 cups of flour, 9 eggs and 3 tbs of oil?
Recipe: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles
What is flour?
The percent yield tells you a relationship between the _________ yield and actual yield of a certain product.
What is theoretical
This is the coefficient in front of nitrogen gas in the correctly balanced form of the equation:
(NH4)NO2 --> N2 + H2O
What is 1
This is the amount of lithium nitride produced if 5.50g of Lithium reacts with an excess of nitrogen gas. The reaction:
6Li + N2 --> 2Li3N
What is 9.16 grams
In a chemical reaction, these is the reactant(s) not used up when the reaction is finished.
What is excess reactants
This is the actual amount of grams produced f the theoretical yield of a reaction is 42.0 grams of product and the percent yield is 75%.
What is 32 g
This is the amount of moles of water that are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas Given the reaction:
2H2 + O2 → 2H2O
What is 4.4 moles
This is the amount of calcium carbonate produced when a chemist reacts 14.4g of CaO with an excess of CO2.
What is 25.7 grams.
There are 100.0 grams of each reactant available. Determine the limiting reactant in this equation.
SO2 + 2NaOH → Na2SO3 + H2O
What is NaOH?
This is the percent yield when a sample of 8.5 g NH3 on oxidation produces 4.5 g of NO. Reaction:
4NH3 + 5O2 → 4NO + 6H2O
What is 30 %
In the below reaction, this is the mole ratio of Aluminum to Aluminum Oxide.
2Al2O3 --> 4Al + 3O2,
What is 2:1
This is the amount of moles of H2 that can be made from the complete reaction of 3.0 moles of Al Given:
2 Al + 6 HCl → 2 AlCl3 + 3 H2
What is 4.5 moles
This is the amount (in grams) of zinc chloride produced from the reaction of 202.7 grams of lithium chloride and an excess of zinc.
What is 329 g
This is the theoretical yield of silicon carbide if 50.0 grams of silicon dioxide reacts with 79.1 grams of Carbon. SiO2 + C → SiC + CO
What is 33.3 g
This is the percent yield if 155 grams of calcium carbonate is treated with 250 grams of hydrochloric acid and 142 grams of calcium chloride is obtained? CaCO3 + HCl → CaCl2 + CO2 + H2O
What is 56.6%