SToichiometry: Grams to Grams

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 does a balanced chemical equation represent?

Back

A balanced chemical equation represents the quantities of reactants and products in a chemical reaction, ensuring that the number of atoms for each element is the same on both sides.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol).

Front

What is the molar mass of H2O?

Back

The molar mass of H2O (water) is approximately 18.02 g/mol.

Front

In the reaction 2H2 + O2 → 2H2O, how many moles of H2O are produced from 4 moles of H2?

Back

4 moles of H2 will produce 4 moles of H2O.

Front

What is the mole ratio in the reaction 2Al + 3H2SO4 → Al2(SO4)3 + 3H2?

Back

The mole ratio is 2 moles of Al to 3 moles of H2SO4.

Front

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

Back

To find the mass of a product, use the mole ratio from the balanced equation and convert moles of reactants to grams using their molar masses.

Front

What is the significance of the coefficients in a balanced equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction.

Front

How many grams of O2 are needed to react with 36.1 g of B2H6 in the reaction B2H6 + 3O2 → 2HBO2 + 2H2O?

Back

124 g of O2 are needed.

Front

If 120 g of Na reacts with water, how much hydrogen is produced in the reaction 2Na + 2H2O → 2NaOH + H2?

Back

5.2 g of hydrogen is produced.