Mole Calculations

What is the SI unit for measurement of number of particles in a substance?

• kilogram

• ampere

• atom

• mole

• 1.3 x 10^{-1} moles

• 1.3 x 10^{-2} moles

• 80 moles

How many moles of silver atoms are there in 1.8 x 10^20 atoms of silver?

• 3.3 x 10^{-3}

• 1.1 x 10^44

How many atoms are there in 0.075 mol of titanium?

• 1.2 x 10^{-25}

• 4.5 x 10^22

• 3.6

How many molecules are there in 2.1 mol CO₂?

• 1.26 x 10^24 molecules

• 3.49 x 10^{-24} molecules

• 2.53 x 10^24 molecules

• 3.79 x 10^24 molecules

• 4.0 mol

• 10.0 mol

• 2.4 x 10^24 mol

• 2.0 mol

How many atoms are there in 3.5 moles of arsenic atoms?

• 5.8 x 10^{-24} atoms

• 7.5 x 10^1 atoms

• 2.6 x 10^2 atoms

• 2.1 x 10^24 atoms

How many moles of SO₃ are in 2.4 x 10²⁴ molecules of SO₃?

• 3.4 x 10²²

• 0.25

• 4.0

• 2.9 x 10⁻²³

How many ammonium ions, NH4+, are there in 5.0 mol (NH4)2S?

• 6.0 x 10^24

• 4

• 6

• 8

• 10