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
Which formula can be used to calculate the molar mass of hydrogen peroxide
Answers: 1
Chemistry, 22.06.2019 15:30
Which of the following are correct values for the ideal gas laws constant r
Answers: 1
Chemistry, 22.06.2019 18:00
How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.
Answers: 3
The empirical formula of glucose is ch2o, and the molecular formula of glucose is 6 times than the e...
Mathematics, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
English, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
Mathematics, 17.07.2020 07:01
English, 17.07.2020 07:01