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A 1.35-gram sample of compound

Plaster of Paris is the compound calcium sulfate hemihydrate, CaSO4*1/2H2OWhat mass of water is liberated when a 2.763 gram
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An unknown compound contains carbon, hydrogen, and oxygen. When burned, a 2.000 gram sample of this compound releases 3.451 g of
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A 2.91 gram sample of a gaseous compound that contains only boron and hydrogen has a volume of 1.22 L at 25°C and 1.09 atm.
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A 0.199-gram sample of a pure gaseous compound occupies 122mL at 100OC and 790 torr. What is the molar mass of the compound? (
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2. asked by Ruth Heredia
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A 0.199-gram sample of a pure gaseous compound occupies 122mL at 100OC and 790 torr. What is the molar mass of the compound? (
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2. asked by Ruth Heredia
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If a 40 gram sample of radioactive isotope was present at 4pm, but a 5 gram sample remained at 4:30 pm, what is the half-life in
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A chemistry needs 25.0 mL of a liquid compound.a) What mass of the compound is necessary if the density is 0.718 g/cm³? b) If
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A 0.400 gram sample of a substance contains 0.141 g of potassium, 0.115 g of sulfur, and 0.144 g of oxygen. What is the
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A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this
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2. asked by Ellie
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A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter
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