Mass to Mass Stoichiometry Practice

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 mole concept?

Back

The mole is a unit of measurement in chemistry that represents 6.022 x 10²³ particles (atoms, molecules, etc.). It allows chemists to count quantities of substances.

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). Formula: Moles = Mass (g) / Molar Mass (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. It can be determined by comparing the mole ratio of reactants used to the mole ratio in the balanced equation.

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

To calculate the mass of a product, use the balanced equation to find the mole ratio between the reactant and product, convert the mass of the reactant to moles, and then use the mole ratio to find moles of the product. Finally, convert moles of the product back to grams.

Front

What is the molar mass of Na?

Back

The molar mass of sodium (Na) is approximately 23 g/mol.

Front

What is the balanced equation for the reaction of aluminum with oxygen?

Back

4Al + 3O2 → 2Al2O3.

Front

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

Back

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