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3.2 moles of calcium chlride have a mass of ____grams
a) 0.028
b) 240
c) 0.56
d) 355
347 g of magnesium oxide is _____ moles
a) 8.68
b) 5.22
c) 17.4
d) 13880
3.2 moles of zinc nitrate has ____ molecules
a) 0.013
b) 6.02 E 23
c) 1.93 E 24
d) 5.3 E -24
what is the percent by mass of carbon in a molecule of carbon tetrachloride
a) 79%
b) 8%
c) 26%
d) 13%
What percent by mass is oxygen in aluminum oxide?
a) 26%
b) 50%
c) 18%
d) 47%
How many moles of tungsten are in 8.34 E 24 atoms of tungsten?
a) 13.9
b) 0.075
c) 2544
d) 13.9 E 47
how many moles of calcium phosphide are in 250 grams
a) 1.4
b) 182
c) 1505
d) .728
How many liters of gas are in 3 moles of helium
a) 268.8
b) 12
c) 67.2
d) 0.4
what perecent by mass is sodium of sodium chloride
a) 40%
b) 2.5%
c) 50%
d) 60%
Sodium is a ___
a) salt
b) metal
c) gas
d) halogen
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