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Mole Conversion Practice!! Avogadro’s Number, Molar Mass, Molar Volume
Name: Date: Block:
(a) How many atoms are in 2 molecules of Hg(IO3)2?
(b) What volume at STP is occupied by 1.45 x 1030 molecules of COF2 gas?
(c) How many molecules are there in 64.0 g of FeS?
(d) How many moles are in 25.0 mL of HCN at STP?
(e) What volume at STP is occupied by 43.5 g of ClF3?
(f) How many moles are in 2.75 x 10 23 atoms of Fe?
(g) How many molecules are there in 125 mL of NOCl at STP?
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(h) What is the mass of 3.01 x 1022 atoms of Pt?
(i) What is the mass of 25.0 mL of Kr at STP?
(j)What is the molar mass of 00139 mol of a substance having a mass of 0.888 g? (j) What is the density of acetic acid, CH3COOH, if 0.250 mol of CH3COOH has a volume of 14.3
mL?
(k) How many moles are in 85.0 mg of CuSCN?
(l) If 135 L of cyanogen gas has a mass of 313 g at STP, what is the molar mass of cyanogen?