Answers: 2
Chemistry, 22.06.2019 03:40, allyyzz
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
Chemistry, 22.06.2019 06:00, rigobertogarza2
According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead
Answers: 2
Chemistry, 23.06.2019 08:50, leah5981
Reacting masses1 calcium carbonate breaks down on heating to produce calcium oxide and carbondioxide gas. caco3 + cao + co2a student heats 15 g of calcium carbonate strongly in a crucible. relative atomic masses (a): ca = 40, c = 12, o = 16.calculate the mass of calcium oxide produced by this reaction.(5 marks)
Answers: 3
Chemistry, 23.06.2019 14:20, ashleymunoz928
Identificaa 5 características que comparten las guacamayas y dos caracteristicas que las hagan diferentes
Answers: 1
A musk ox and the Alstroemeria flower have physical structures and organs that have similar function...
Mathematics, 24.09.2021 15:20
Social Studies, 24.09.2021 15:20
Mathematics, 24.09.2021 15:20
Mathematics, 24.09.2021 15:20
History, 24.09.2021 15:20