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A thoroughly dried 1.281g sample

A thoroughly dried 1.281g sample of Na2SO4 is exposed to the atmosphere and found to gain 0.383g in mass.What is the percent, by
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2. asked by Lisa
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Please help me through this problem...A 0.5117 gram fertilizer containing phsphorus was oven dried. The weight of the dried
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2. asked by smiley
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0.281g of Fe(NH4)2(SO4)2*6H2O is dissolved in a total volume of 500.0 mL of water, calculate the resulting Fe concentration in
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2. asked by ella
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A sample of anthracite has a moisture content of 5% when mined and an energy density of 35 kJg-1 when completely dried.Assuming
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Food per adult:- 200 pounds of flour - 150 pounds of bacon - 20 pounds of sugar - 10 pounds of coffee - 10 pounds of salt -
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A sausage sample was found to contain 65% moisture, based on fresh weight. The sausage was dried in an oven until its moisture
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2. asked by James
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A sausage sample was found to contain 65% moisture, based on fresh weight. The sausage was dried in an oven until its moisture
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2. asked by Maya
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assume an unknown sample to be 15% copper, weigh enough dried ore sample to use approximatele 35-45mL of .09M S2O3-. How many
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A scientist observed two rock samples. Sample A was found in the bottom of a dried–up lake and contained fossils. Sample B was
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2. asked by blah
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A scientist observed two rock samples. Sample A was found in the bottom of a dried-up lake and contained fossils. Sample B was
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2. asked by maya
3. 2,626 views