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Mole Calculations Multiple Choice Review
PSI Chemistry Name_________________________________
The Mole and Avogadro's Number
What is the SI unit for measurement of number of particles in a substance ?
kilogram
ampere
candela
mole
Kelvin
How many moles of tungsten atoms are there in 4.8 x 1025 atoms of tungsten?
1.3 x 10-1 moles
8.0 x 10-1 moles
1.3 x 10-2 moles
80 moles
8.0 x 102 moles
How many moles of silver atoms are there in 1.8 x 1020 atoms of silver?
3.0 x 102
3.3 x 10-3
3.0 x 10-4
1.1 x 1044
None of the above
How many atoms are there in 5.7 mol of hafnium?
3.43 x 1024 atoms
1.06 x 1022 atoms
1.06 x 1023 atoms
3.43 x 1023 atoms
6.02 x 1023 atoms
How many atoms are there in 0.075 mol of titanium?
1.2 x 10-25
6.4 x 102
4.5 x 1022
3.6
2.2 x 1024
How many molecules are there in 2.1 mol CO2?
1.26 x 1024 molecules
3.49 x 10-24 molecules
2.53 x 1024 molecules
3.79 x 1024 molecules
1.05 x 10-23 molecules
How many ammonium ions, NH4+, are there in 5.0 mol (NH4)2S?
3.4 x 102
6.0 x 1024
6.0 x 1025
3.0 x 1024
1.5 x 1025
Butanol is composed of carbon, hydrogen, and oxygen. If 1.0 mol of butanol contains 6.0 x 1024 atoms of hydrogen, what is the subscript for the hydrogen atom in C4H?O?
1
8
6
4
10
How many moles of helium atoms are there in 2.4 x 1024 helium atoms?
4.0 mol
10.0 mol
2.4 x 1024 mol
2.0 mol
6.0 mol
How many atoms are there in 3.5 moles of arsenic atoms?
5.8 x 10-24 atoms
7.5 x 101 atoms
2.6 x 102 atoms
2.1 x 1024 atoms
1.7 x 1023 atoms
How many bromide ions are there in 1.5 moles of MgBr2?
2.8 x 102 ions
1.8 x...