Answers: 1
Chemistry, 22.06.2019 03:40
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 09:30
What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.
Answers: 2
Chemistry, 22.06.2019 09:30
Apump contains 0.5 l of air at 203 kpa.you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of the air pump
Answers: 2
Chemistry, 23.06.2019 00:00
If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.
Answers: 1
What atomic or hybrid orbitals make up the pi bond between the c1 and c2 in tetrafluoroethylene, c2f...
Chemistry, 09.07.2019 09:30
English, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30
Computers and Technology, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30
Chemistry, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30
English, 09.07.2019 09:30
Business, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30
Mathematics, 09.07.2019 09:30