Chemistry

Chemistry, 09.07.2019 22:30, jusicca1109

What is the percent of h2o in a sample of a hydrate whose mass is 1.1290 g if the mass of water in the sample was 0.1660 g?

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Chemistry, 27.06.2019 01:20, lalllda

Astudent is given a sample of a calcium sulfate hydrate. he places the sample in a dry, covered crucible and weighs it. the total mass (crucible, cover, and hydrate) is 18.89918.899 g. the crucible and cover together had previously weighed 17.65517.655 g. he then heats the crucible to redness for 10 minutes with the cover slightly ajar. after the crucible cools, he weighs the crucible and its contents; the mass is now 18.63918.639 g, due to the loss of water of hydration. what is the mass of the original sample? mass of original sample : g what is the mass of the anhydrous (dehydrated) sample? mass of anhydrous sample : g what is the mass of the water that is driven off? mass of water driven off :

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Chemistry, 29.08.2019 17:30, jocelyntucker

After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of 38 percent. the correct value for the percentage of water in the hydrate is 51 percent. which of the following is the most likely explanation for this difference? a) strong initial heating caused some of the hydrate sample to splatter out b) the dehydrated sample absorbed moisture after heating c) the amount of the hydrate sample used was too small d) the crucible was not heated to constant mass before use e) excess heating caused the dehydrated sample to decompose

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Chemistry, 09.10.2019 12:00, idcatall5

Asample of hydrated calcium sulfate has a mass of 2.643 g. after dehydration, the sample has a mass of 2.090 g. what is the percent by mass of water in the hydrate? % a sample of hydrated iron (ii) chloride has a mass of 0.385 g. after dehydration, the sample has a mass of 0.245 g. what is the percent by mass of water in the hydrate? % a sample of hydrated magnesium chromate has a mass of 8.557 g. after dehydration, the sample has a mass of 5.211 g. what is the percent by mass of water in the hydrate? %

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