Chemistry, 14.07.2019 21:00, kingofguns1560
The freezing point of camphor is 178.4�c and its molal freezing point depression constant (kf) is 37.7�c�kg/mol. how many grams of naphthalene (c10h8; molar mass = 128.17 g/mol; a solute, not the solvent, in this question) should be mixed with 12.0 g of camphor to lower the freezing point to 170.0 �c?
Answers: 1
Chemistry, 21.06.2019 14:30, janayflowers042
Order the following from smallest to largest atom, electron, quark, proton, neutron, molecule, nucleus
Answers: 1
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
The freezing point of camphor is 178.4�c and its molal freezing point depression constant (kf) is 37...
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