Mole Quiz Review

How many molecules are in 63 grams of water?

• 18.02 moleclues

• 3.8 x 10²⁵ moleclues

• 2.1 x 10²⁴ moleclues

• 3.5 molecules

Determine the number of atoms in 26.00g of chromium.

• 3.0 x 10²³ atoms

• 4.15 x 10^-24 atoms

• 2.71 x 10^-22 atoms

• 0.5 atoms

How many grams are in 7.5 X 10²³ molecules of H₂SO₄

_{(Masses: H=1, S=32, O=16)}

• 98.09 g H₂SO₄

• 122g H₂SO₄

• 45g H₂SO₄

• 100g H₂SO₄

Determine the number of atoms in 2.50 moles of Zinc.

• 4.15 x 10^-24 atoms

• 1.51 x 10²⁴ atoms

• 163 atoms

• 2.71 x 10^-22 atoms

If you have 4.57 x 10¹³ atoms of copper, how many moles do you have?

• 7.59 x 10^-11 moles

• 2.75 x 10³⁷ moles

• 7.59 x 10¹¹ moles

• 2.75 x 10³³ moles

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

Which statement is the BEST definition of a mole?

• One mole of a substance contains 6.02 x 10²³ atoms of that substance.

• One mole of a substance contains 6.02 x 10²³ particles, but different masses.

• A mole is 12 g of any element.

• A mole of any substance contains the same number of particles as 12 g of naturally occurring carbon.

Calculate the molar mass of NH₄NO₂

• 50 g/mol

• 60 g/mol

• 64 g/mol

• 78 g/mol

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

Which statement correctly identifies how mass, mole, and atoms are related?

• Atomic Number = 1 mole = 6.02 x 10²³ atoms

• Molar Mass = 1 mole = 6.02 x 10²³ atoms

• Molar Mass = 0.5 mole = 3.01 x 10²³ atoms

• Atomic Number = 0.5 mole = 3.01 x 10²³ atoms