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Mix
Moles
Stoich
Limiting Reagent
% Yield
100

What area of chemistry focuses on the quantitative relationships between the masses of substances in chemical compounds and reactions?

What is Stoichiometry

100

This is the coefficient of hydrogen gas in the balanced form of the reaction: H₂ + O₂ → H₂O.


What is 2

100
This is the amount of magnesium chloride produced (in grams) if 20.0 g of magnesium react with excess hydrochloric acid Mg + HCl -------> MgCI2 + H2
What is 39.2 grams
100
This is the ingredient that is the limiting reactant if you have 5 cups of flour, 9 eggs and 3 tbs of oil? Given: 2 cups flour + 3 eggs + 1 tbs oil → 4 waffles
What is flour
100
The percent yield tells you a relationship between the _________ yield and actual yield of a certain product.
What is theoretical
200

Which values in a chemical equation help identify the mole ratios between reactants and products?


What are coefficients?

200

This is the coefficient in front of nitrogen gas in the correctly balanced form of the equation: (NH₄)NO₂ → N₂ + H₂O.


What is 1

200
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
200
In a chemical reaction, reactants that are not use up when the reaction is finished are called
What is excess reactants
200
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
300

These units are used to express the molar mass of a substance


What is g/mol.

300
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
300
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.
300
  There are 100.0 grams of each reactant available. Determine the limiting reactant in this equation. SO2 + 2NaOH → Na2SO3 + H2O
What is NaOH
300
This is the percent yield when a sample of 8.5 g NH3 on oxidation produces 4.5 g of NO. Reaction: 4 NH3 + 5 O2 → 4 NO + 6 H2O
What is 30 %
400

In the balanced chemical equation 2Al₂O₃ → 4Al + 3O₂, this is the mole ratio of aluminum to aluminum oxide.


What is 2:1/4:2

400
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
400
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
400
  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
400
  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%
500

This is the molar mass of Copper(II) Sulfate.

What is approximately 159.61/160 grams per mole?

500
This is how many moles of LiOH are required to react 20 moles of CO2 in the following reaction: CO2 + 2LiOH --> Li2CO3 + H2O
What is 40 moles.
500
This is the amount (in grams) of aluminum oxide produced from the reaction of 0.353 grams solid aluminum with an excess of oxygen gas.
What is 0.663 grams.
500
This is the amount (g) of lead chloride formed if 135.8g of sodium chloride reacts with 95.7g of lead(II) in a single replacement reaction.
What is 128.06g
500
This is the percent yield of CuS given that you start with ? 15.5 g Na2S and ? 12.1 g CuSO4. The actual amount of CuS produced was ?3.05g . Reaction: Na2S + CuSO4 → Na2SO4 + CuS
What is 42.1%?