Stoichiometry 2

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 do coefficients in a chemical equation represent?

Back

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

Front

How do you calculate the molar mass of a compound?

Back

By adding up the molar masses of its component elements.

Front

What is the ideal gas law equation?

Back

PV = nRT, where P is pressure, V is volume, n is number of moles, R is the ideal gas constant, and T is temperature in Kelvin.

Front

What is the molar volume of a gas at STP?

Back

The molar volume of a gas at standard temperature and pressure (STP) is 22.4 L.

Front

How many grams of O2 are produced from 10.00 moles of KClO3?

Back

480 g of O2.

Front

What is the relationship between moles and volume of a gas at STP?

Back

At STP, 1 mole of any gas occupies 22.4 liters.

Front

How do you convert moles to grams?

Back

Multiply the number of moles by the molar mass of the substance.

Front

What is the significance of subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of particles in one mole of a substance.