Stoichiometry Mass to Mass

Front

What is stoichiometry?

Back

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

Front

What is the molar mass of a compound?

Back

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

Front

How do you calculate the molar mass of NaCl?

Back

To calculate the molar mass of NaCl, add the atomic masses of sodium (Na, 22.99 g/mol) and chlorine (Cl, 35.45 g/mol): 22.99 + 35.45 = 58.44 g/mol.

Front

What is the balanced equation for the combustion of methane (CH4)?

Back

The balanced equation is: CH4 + 2O2 → 2H2O + CO2.

Front

How do you determine the mass of a product formed in a reaction?

Back

Use stoichiometric ratios from the balanced equation and the molar mass of the reactants and products.

Front

What is the mole ratio in the reaction 2Na + 2H2O → 2NaOH + H2?

Back

The mole ratio is 2:2:2:1 for Na: H2O: NaOH: H2.

Front

How many grams of hydrogen are produced from 120 g of sodium (Na)?

Back

5.2 g of hydrogen are produced when 120 g of sodium reacts.

Front

What is the mole ratio of H2 to O2 in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio is 2 moles of H2 to 1 mole of O2.

Front

How many moles of NH3 are produced from 1 mole of H2 in the reaction N2 + 3H2 → 2NH3?

Back

2/3 moles of NH3 are produced from 1 mole of H2.

Front

If 8 moles of H2 are used, how many moles of O2 are consumed?

Back

4 moles of O2 are consumed when 8 moles of H2 are used.