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.

Front

What is the mole concept?

Back

A mole is a unit that measures the amount of a substance. One mole contains approximately 6.022 x 10²³ particles (atoms, molecules, etc.).

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 balanced equation for the combustion of B2H6?

Back

B2H6 + 3O2 → 2HBO2 + 2H2O.

Front

How do you determine the limiting reactant in a chemical reaction?

Back

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

Front

What is the molar mass of O2?

Back

The molar mass of O2 (oxygen gas) is approximately 32 g/mol.

Front

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

Back

Use the stoichiometric coefficients from the balanced equation and the molar masses of the reactants and products.

Front

What is the relationship between moles of reactants and products in a balanced equation?

Back

The coefficients in a balanced equation indicate the ratio of moles of reactants to moles of products.

Front

How many grams of hydrogen are produced from 120 g of sodium in the reaction 2Na + 2H2O → 2NaOH + H2?

Back

5.2 g of hydrogen are produced.

Front

What is the molar mass of carbon (C)?

Back

The molar mass of carbon is approximately 12 g/mol.