1. How many grams are in 0.32 moles of lead (II) chloride?

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Presentation transcript:

1. How many grams are in 0.32 moles of lead (II) chloride? 0.32 mole PbCl2 x 278.2 g = 89 grams PbCl2 1 mole

How many moles are in a 152 gram sample of aluminum carbonate? 152 g Al2(CO3)3 x 1 mole = 0.650 moles 234.0g

What is the percentage (by mass) of oxygen in zinc nitrate? Zn (NO3)2 Zn = 65.4 2 N = 28.0 6 O = 96.0 96.0 x 100 = 50.7 % 189.4 189.4 oxygen

4. How many moles in 49.3 grams of carbon tetrachloride? 49.3 g CCl4 x 1 mole = 0.320 moles CCl4 154.0 g

What is the mass of 0.15 moles of potassium sulfate? 0.15 mole K2SO4 x 174.3 g = 26. g K2SO4 1 mole

6. What is the percentage of sulfur in chromium(III) sulfate? Cr2(SO4)3 2 Cr = 104.0 3 S = 96.3 96.3 = 24.5 % S 12 O = 192.0 392.3 392.3

How many grams in 1.3 moles of sugar (C6H12O6)? 1.3 mole C6H12O6 x 180.0 g = 230 g 1 mole

How many atoms are in 2.5 moles of mercury? 2.5 mol x 6.02 x 1023 atoms = 1.5 x 1024 atoms 1 mole

9. How many atoms are in 6.0 g of carbon? 6.0g C 1 mol C = 0.50 mol C 12.0 g C 0.50 mol 6.02 x 1023atoms = 3.0 x 1023 atoms 1 mol