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

What is the molar mass of a substance?

Back

The molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the mass of a reactant needed in a reaction?

Back

To calculate the mass of a reactant needed, use the formula: mass = moles × molar mass.

Front

What is a limiting reactant?

Back

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

Front

How do you determine the percent yield of a reaction?

Back

Percent yield is calculated using the formula: (actual yield / theoretical yield) × 100%.

Front

What is the balanced equation for the reaction of HCl with Mg(OH)2?

Back

Mg(OH)2 + 2 HCl → 2 H2O + MgCl2.

Front

If 8 moles of H2 are used, how many moles of water are produced in the reaction 2H2 + O2 → 2H2O?

Back

8 moles of H2 produce 8 moles of H2O.

Front

What is the molar mass of NaOH?

Back

The molar mass of NaOH is 40.00 g/mol.

Front

What is the role of coefficients in a balanced chemical equation?

Back

Coefficients indicate the relative number of moles of each reactant and product involved in the reaction.

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 to the mole ratio in the balanced equation.