Mole Conversions Question Preview (ID: 27126)


Simple Mole Conversions.

What is the mass of 3.0 E23 molecules of CO₂?
a) 22 g
b) 44 g
c) 66 g
d) 88 g

What mass of chlorine contains the same number of atoms as 63 g of sodium?
a) 63 g
b) 96 g
c) 126 g
d) 80 g

How many total atoms are in 1.0 mol of Ca₃N₂?
a) 6.0 E23
b) 1.2 E24
c) 1.8 E24
d) 3.0 E24

How many moles of Fe2O3 are in 79.85 g Fe₂O₃?
a) 1.000mol
b) 0.5000 mol
c) 0.2500 mol
d) 0.1000 mol

How many moles of oxygen are in 17 moles of Ba₃(PO₄)₂?
a) 17 mol
b) 34 mol
c) 102 mol
d) 136 mol

How many helium atoms are in 6.44 E-24 g of helium?
a) 1 atom
b) 1000 atoms
c) 4 atoms
d) 2 atoms

Which has the largest molar mass?
a) Calcium sulfate
b) Magnesium sulfate
c) Lithium sulfate
d) Sodium sulfate

Bromine is a diatomic element. The molar mass of elemental bromine is
a) 79.9 g/mol
b) 40.0 g/mol
c) 160 g/mol
d) 120 g/mol

The molar mass of H₂O₂ is
a) 8 grams greater than the molar mass of water
b) 16 g greater than the molar mass of water
c) Twice the molar mass of water
d) The same as the molar mass of water

Which has the largest molar mass?
a) Carbon dioxide
b) Water
c) Lithium chloride
d) Titanium

How many moles of oxygen atoms are contained in 44 g of cabon dioxide?
a) 1.0 mol
b) 1.6 mol
c) 2.0 mol
d) 4.4 mol

A sample containing 1.5E23 nitrogen molecules contains the same number of molecules as
a) 1.0 mol hydrogen
b) 2.0 mol helium
c) 0.25 mol oxygen
d) 0.5 mol Ne

What is the molar mass of calcium nitrate?
a) 164 g/mol
b) 150 g/mol
c) 102 g/mol
d) 70.0 g/mol

What is the mass of 3.0E23 atoms of helium?
a) 8.00 g
b) 2.00 g
c) 3.50 g
d) 4.00 g

A 39 g portion of LiF contains how many moles?
a) 1.0 mol
b) 2.0 mol
c) 0.5 mol
d) 1.5 mol

What is the molar mass of aa compound if 5 moles has a mass of 100 g?
a) 5 g/mol
b) 20 g/mol
c) 0.05 mol/g
d) 500 g

What is the molar mass of (NH₄)₃PO₄
a) 113 g/mol
b) 121 g/mol
c) 149 g/mol
d) 404 g/mol

Which has the largest molar mass? NO, NO₂, N₂O, or N₂O₄?
a) NO
b) NO₂
c) N₂O
d) N₂O₄

Avogadro's number represents the number of atoms in
a) 12 g Carbon
b) 12.7 g Iodine
c) 320 g Sulfur
d) 18 g Water

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