Introduction to Molar Mass

What is the molar mass of NaOH?

• 40.0 g/mol

• 38.9 g/mol

• 23.9 g/mol

• 57.0 g/mol

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the molar mass of B₂(CO₃)₃?

• 81.63 g/mol

• 94.84 g/mol

• 38.82 g/mol

• 201.65 g/mol

How many moles are in 19.82 g Mg? HINT: You will need the molar mass of Magnesium.

• 1.226 mol Mg

• 481.7 mol Mg

• 1.000 mol Mg

• 0.8153 mol Mg

Calculate the mass of 5.0 mol of iron. HINT: You will need the molar mass of Iron.

• 8.3 x 10^-24 g

• 0.090 g

• 3.0 x 10²⁴ g

• 280 g

How many moles are in 16.94g of water? HINT: You will need the molar mass of H₂O.

• 16.94 mol H₂O

• 0.9401 mol H₂O

• 305.3 mol H₂O

• 1.063 mol H₂O

What is the molar mass of CO₂?

• 12.01 g/mol

• 16.00 g/mol

• 32.00 g/mol

• 44.01 g/mol

Which list of number of atoms in Mg(NO₃)₂ is right?

• 1 Mg, 6 NO
  

• 1 Mg, 6 N, 6 O
  

• 1 Mg, 1 N, 5 O
  

• 1 Mg, 2 N, 6 O
  

Tags

NGSS.MS-PS1-1

Which list of number of atoms in MgF₂ is right?

• 1 Mg, 1 F
  

• 1. 1 Mg, 2 F
     

• 2 Mg, 1 F
  

• 0 Mg, 1 F
  

Tags

NGSS.MS-PS1-1

What is the molar mass of table salt (NaCl)?

• 116.89 g/mol

• 35.45 g/mol

• 22.99 g/mol

• 58.44 g/mol