Chemistry Multiple Choice Review Questions

What is the molar mass of H2O?

• 10 g/mol

• 16 g/mol

• 18 g/mol

• 20 g/mol

Tags

NGSS.HS-PS1-7

How many moles are in 36 grams of water (H2O)?

• 1 mol

• 2 mol

• 3 mol

• 4 mol

What is the mass of 0.5 mol of CO2? (Molar mass = 44 g/mol)

• 22 g

• 44 g

• 88 g

• 11 g

How many grams are in 2 moles of NaCl? (Molar mass = 58.5 g/mol)

• 29.25 g

• 58.5 g

• 117 g

• 234 g

How many molecules are in 2 moles of water?

• 3.01 x 10^23

• 1.20 x 10^24

Tags

NGSS.HS-PS1-7

How many molecules are in 5 moles of CO2?

• 1.20 x 10^24

• 3.01 x 10^24

• 3.01 x 10^24

Tags

NGSS.HS-PS1-7

How many atoms are in 1 mole of O2?

• 6.02 x 10^23 atoms

• 3.01 x 10^23 atoms

• 6.02 x 10^22 atoms

Tags

NGSS.HS-PS1-7

• 1 mol

• 2 mol

• 0.5 mol

• 3 mol

What is Avogadro's number?

• 3.01 x 10^23

• 1.00 x 10^24

Tags

NGSS.HS-PS1-7

Which statement best represents the law of conservation of mass?

• Mass is destroyed during reactions

• Atoms are lost in a reaction

• Total atoms before = total atoms after

• Products weigh more than reactants

Tags

NGSS.HS-PS1-7