Unit 8 Practice Test- Stoichiometry

Front

What is Stoichiometry?

Back

Stoichiometry is the branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams per mole).

Front

What is the molar mass of NaCl?

Back

The molar mass of NaCl (Sodium Chloride) is approximately 58.44 g/mol.

Front

What is a limiting reactant?

Back

A limiting reactant is the substance that is completely consumed in a chemical reaction, limiting the amount of product formed.

Front

How do you calculate percent yield?

Back

Percent yield = (Actual yield / Theoretical yield) x 100%.

Front

What is the theoretical yield?

Back

The theoretical yield is the maximum amount of product that can be produced from a given amount of reactants, calculated based on stoichiometric ratios.

Front

What is the balanced equation for the formation of ammonia?

Back

N2 + 3H2 → 2NH3.

Front

If you have 2 moles of N2, how many moles of H2 are needed?

Back

6 moles of H2 are needed to react with 2 moles of N2.

Front

What is the total number of moles of water needed to produce glucose (C6H12O6)?

Back

For the reaction 6CO2 + 6H2O → C6H12O6 + 6O2, 6 moles of water are needed for every mole of glucose produced.

Front

How do you identify the limiting reactant in a reaction?

Back

To identify the limiting reactant, compare the mole ratio of the reactants used in the reaction to the mole ratio required by the balanced equation.