Unit 9 Review Quiz

Nora is conducting a chemistry experiment and needs to know the exact number of particles in one mole for her calculations. What is the Avogadro's number?

• 6.02 x 10^23 particles

• 6.02 x 10^22 particles

• 5.02 x 10^23 particles

• 7.02 x 10^23 particles

At what temperature and pressure does one mole of an ideal gas occupy 22.4 liters?

• 0°C and 1 atm

• 25°C and 1 atm

• 0°C and 2 atm

• 25°C and 2 atm

Where do we find the numbers for the mole ratio?

• Must be given in the problem.

• Coefficients from the balanced equation.

• Written on the mole map.

• 16.00 g/mol

• 18.02 g/mol

• 17.01 g/mol

• 20.02 g/mol

WHAT CONVERSION FACTOR(S) DO WE NEED TO SOLVE THIS PROBLEM?
What is the mass of 0.89 mol of CaCl₂?
choose all that apply

• molar mass of CaCl₂

• Avogadro's number

• mol to L conversion

• mole ratio

WHAT CONVERSION FACTOR(S) DO WE NEED TO SOLVE THIS PROBLEM?
How many water molecules are in 5.2 moles of water?
choose all that apply

• molar mass of H2O

• Avogadro's number

• mol to L conversion

• mole ratio

WHAT CONVERSION FACTOR(S) DO WE NEED TO SOLVE THIS PROBLEM?
If you start with 3.88 x 10²⁴ atoms of Na and an excess of Cl₂, how many grams of NaCl should you get?
choose all that apply

• molar mass of NaCl

• Avogadro's number

• mol to L conversion

• mole ratio

• molar mass of Na

WHAT CONVERSION FACTOR(S) DO WE NEED TO SOLVE THIS PROBLEM?
How many moles of CO2​ are produced when 5.0 moles of C8​H18​ are completely combusted in excess oxygen?
choose all that apply

• molar mass of CO2

• Avogadro's number

• mol to L conversion

• mole ratio

WHAT CONVERSION FACTOR(S) DO WE NEED TO SOLVE THIS PROBLEM?
If you have 12.0 grams of hydrogen gas reacting with an excess of nitrogen gas to produce NH3, how many grams of NH3 can be produced?
choose all that apply

• molar mass of H2

• Avogadro's number

• mol to L conversion

• mole ratio

• molar mass of NH3

A reactant that remains after a chemical reaction stops

• stoichiometry
• mole ratio
• excess reactant
• limiting reactant