Moles and Mole Conversions

3.0 moles of sodium hydroxide, NaOH, is equal to what mass?

• about 40 grams

• about 23 grams

• about 120 grams

176 grams of carbon dioxide, CO₂, is equal to how many moles of the substance.

• about 44 moles

• about 4 moles

• about 1 mole

What is the molar mass of aluminum carbonate, Al₂(CO₃)₃?

• 54.99 g/mol

• 233.99 g/mol

• 185.99 g/mol

Shivani measures out 6.0 moles of epsom salt (MgSO₄) to put in her bath. How many grams of MgSO₄ went in the bath?

• 3.6 x 10²⁴ g

• 720 g

• 0.050 g

• 340 g

Tags

NGSS.HS-PS1-7

How many molecules are there in 31.8 moles of water?

• 5.28 x 10^-23 molecules

• 1.91 x 10²⁵ molecules

• 5.28x 10-²⁵

• 1.91 x 10²²

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles

• 1.81 x 10⁴⁶ moles

• 5.00 x 10²¹ moles

• 5 moles

Tags

NGSS.HS-PS1-7

What is the mass of 0.89 mol of CaCl₂?

• 111 grams

• 0.008 grams

• 98.9 grams

• none of the choices

Which conversion factor should be used to solve the following, "How many moles are in 28 grams of CO₂?"

• mol = 22.4 L 

• mol = 44.01 g

• mol = 6.02x10²³ atoms

• more than one

How do you solve the following problem: How many grams are there in 7.5 moles of H2SO4?

• Convert liters to moles then moles to grams

• Convert particles to moles then moles to grams

• Convert moles to grams

• Convert grams to moles

What is the mole used for? 

• To measure the amount of grams in a substance

• To measure the amount of atoms or molecules in a substance

• To measure the amount of energy in a substance

• To measure the amount of bonding in a substance 

Tags

NGSS.HS-PS1-7