Unit 6 "Retake"

Front

What is the molar mass of NaBr?

Back

102.9 g/mol

Front

Using the equation Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l), how many moles of iron can be made from 6 moles H₂?

Back

4 moles Fe

Front

In the reaction 2H₂ + O₂ → 2H₂O, how many moles of water can be produced if 8 moles H₂ are used?

Back

8 moles

Front

What are mole ratios obtained from?

Back

Balanced chemical equation

Front

In the reaction 4 Al + 3 O₂ → 2 Al₂O₃, how much aluminum is needed to completely react with 45 grams of O₂?

Back

1.875 moles

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is a balanced chemical equation?

Back

An equation that has the same number of atoms of each element on both sides, representing the conservation of mass.

Front

What is the significance of coefficients in a chemical equation?

Back

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

Front

How do you calculate moles from grams?

Back

Moles = mass (g) / molar mass (g/mol).

Front

What is the relationship between moles and volume for gases at STP?

Back

1 mole of any gas occupies 22.4 liters at standard temperature and pressure (STP).