Chemistry, Monday Closer, 4.1.19

If you are solving for mass and you know the number of moles, which conversion should you use?

• 1 mol/molar mass

• 1mol/6.02 x 10²³

• molar mass/ 1 mol

• 6.02 x 10²³ /1 mol

If you know the number of moles and you are solving for the number of atoms, which conversion do you use?

• 6.02 x 10²³ /1 mol

• 1 mol/ 6.02 x 10²³

• molar mass/1 mol

• none of these

What is the molar mass of sodium hydroxide (NaOH)?

• 20 g

• 30 g

• 40 g

• 45 g

Calculate the molar mass for magnesium carbonate (MgCO3)?

• 84 g

• 48 g

• 168 g

• 24 g

If you have 2.96 moles of SO3, sulfur trioxide, how many grams of SO3 do you have?

• 1 mol

• 0.037 g

• 236.8 g

• 100 g