U6 Day 5 - Particle/Mole/Gram Stoichiometry Review

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

How do you determine the number of moles from grams?

Back

To determine the number of moles from grams, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18.02 g/mol.

Front

How many moles are in 5.2 grams of Na?

Back

To find moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol). Molar mass of Na is 22.99 g/mol, so Moles = 5.2 g / 22.99 g/mol ≈ 0.226 moles.

Front

What is the mole ratio in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio is 2 moles of H2 to 1 mole of O2 to 2 moles of H2O.

Front

How many molecules are in 1 mole of a substance?

Back

1 mole of a substance contains approximately 6.022 x 10^23 molecules (Avogadro's number).

Front

What is the first step in solving a stoichiometry problem?

Back

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

Front

How do you convert moles of one substance to moles of another in a reaction?

Back

Use the mole ratio from the balanced equation to convert between moles of different substances.

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.