Name _____KEY_____________________________________ Date _________ Period ______
The Mole and Mass
1.
How many moles are there in 16.5 g of Potassium? MM of K= 39.10 g/mol
16.5 g K x
2.
1 mole K
= 0.422 mol K
39.10 g K
What is the mass of 1.50 mol of I2? MM of I2 = 253.80 g/mol
253.80 g I2
= 381 g I2
1 mol I2
1.50 mol I2 x
3.
How many moles are present in 175 g of BeCl2? MM of BeCl2= 79.91 g/mol
175 g BeCl2 x
4.
How many moles are there in 200.0 g of Li2S? MM of Li2S = 45.95 g/mol
200.0 g Li2 S x
5.
1 mole BeCl2
= 2.19 mol BeCl2
79.91 g BeCl2
1 mole Li2 S
= 4.353 mol Li2 S
45.95 g Li2 S
How many grams are there in 8.62 mol of HBr? MM of HBr = 80.91 g/mol
80.91 g HBr
= 697 g HBr
1 mol HBr
What mass is equal to 0.886 moles of CaO? MM of CaO = 56.08 g/mol
8.62 mol HBr x
6.
56.80 g CaO
= 49.7 g CaO
1 mol CaO
How many moles of FePO4 are there in 319 g? MM of FePO4= 150.82 g/mol
0.886 mol CaO x
7.
319 g FePO4 x
8.
1 mole FePO4
= 2.12 mol FePO4
150.82 g FePO4
What is the mass of 0.1352 mol of Mn(ClO3)2? MM of Mn(ClO3)2 = 221.84 g/mol
0.1352 mol Mn(ClO3 )2 x
9.
How many moles are equal to 82.3 g of NaNO3? MM of NaNO3 = 85.00 g/mol
82.3 g NaNO3 x
10.
221.84 g Mn(ClO3 )2
= 29.99 g Mn(ClO3 )2
1 mol Mn(ClO3 )2
1 mole NaNO3
= 0.968 mol NaNO3
85.00 g NaNO3
How many grams are there in 8.612 mol of Al2(SO4)3? MM of Al2(SO4)3= 342.17 g/mol
8.612 mol Al2 (SO4 )3 x
342.17 g Al2 (SO4 )3
1 mol Al2 (SO4 )3
= 2947 g Al2 (SO4 )3