Lesson: Reaction Masses Glencoe • Chemistry • Matter & Change • Chemistry • The Molecular Nature of Matter and Change • Eighth Edition • Chemistry 13e • AP Edition • Modern Chemistry

Chemistry

In this lesson, we will learn how to calculate the masses of reactants and products using their formula masses, molar quantities, and ratios.

Video

16:23

Q1:

Methane burns in oxygen according to the following equation:

What is the molar ratio of methane to oxygen?

What is the molar ratio of methane to carbon dioxide?

What is the molar ratio of oxygen to water?

Q2:

Methane burns in oxygen according to the equation: The molar mass of methane is 16 g/mol, and the molar mass of molecular oxygen is 32 g/mol.

What is the ratio of the molar masses of methane and oxygen?

What is the ratio of the mass of methane to the mass of oxygen in this reaction?

What mass of oxygen is needed to for 1 g of methane to completely react?

Q3:

Sodium oxide reacts with hydrochloric acid to produce sodium chloride and water, according to the equation:

What is the molar ratio of to ?

What is the molar mass of to two significant figures?

What mass of is required for 2.5 g of to completely react?

Preview