Basic Stoichiometry

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 balanced equations.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, ensuring the law of conservation of mass is followed.

Front

What is the mole ratio in a chemical reaction?

Back

The mole ratio is the ratio of the coefficients of any two substances in a balanced chemical equation, indicating the proportion in which they react or are produced.

Front

How do you determine the mole ratio of reactants and products?

Back

To determine the mole ratio, look at the coefficients in front of each substance in the balanced equation.

Front

What is the first step in solving a stoichiometry problem?

Back

The first step is to write a balanced equation for the reaction.

Front

In the reaction 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O, what is the mole ratio of ethane to oxygen?

Back

The mole ratio of ethane (C2H6) to oxygen (O2) is 2:7.

Front

For the reaction 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe, what is the ratio of moles of MgO to moles of Fe?

Back

The ratio of moles of MgO to moles of Fe is 3:2.

Front

How many moles of CO2 are produced from the combustion of 110 g of CH4?

Back

6.85 moles of CO2 are produced.

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

What is the molar mass of CH4 (methane)?

Back

The molar mass of CH4 is approximately 16.04 g/mol.