Mole Conversions Question Preview (ID: 50015)
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Find the percent composition of N2S2.
a) N: 69.6% S: 30.4%
b) N: 96.6% S: 3.4%
c) N:36% S: 75.6%
d) N: 30.4% S: 69.6%
How many moles are in 88.0 g of propane, C3H8.
a) 2.00 g
b) 0.0510 g
c) 16.0 g
d) 3,870 g
How many atoms are there in 0.075 mol of titanium?
a) 1.2 x 10 ^ -25
b) 6.4 x 10 ^2
c) 4.5 x 10^ 22
d) 2.2 x 10^24
How many molecules are present in 0.250 mol of HCl?
a) 4.15 x 10^–25 molecules
b) 1.51 x 10^23 molecules
c) 2.41 x 10^24 molecules
d) 9.11 molecules
25 g of AlPO4 contains how many oxygen atoms?
a) 4.9 x 10 ^23 O atoms
b) 0.20 O atoms
c) 1.2 x 10^ 23 O atoms
d) 1.5 x 10 ^25 O atoms
One molecule of carbon dioxide has what mass?
a) 28 g
b) 44 g
c) 1.7 x 10^ -24 g
d) 7.3 x 10 ^-23 g
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a) b
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