Chemistry, 19.11.2020 20:40 sophiagardens227
A student determined that 2.5 grams of methane, CH4, produced 139kJ of heat in a bomb calorimeter. What is AErxn for the combustion of methane in kJ/mole CH4? Enter text here
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 15:00
Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude
Answers: 2
A student determined that 2.5 grams of methane, CH4, produced 139kJ of heat in a bomb calorimeter. W...
Business, 21.11.2020 07:50
History, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
History, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
History, 21.11.2020 07:50
Computers and Technology, 21.11.2020 07:50
English, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
Mathematics, 21.11.2020 07:50
English, 21.11.2020 07:50
English, 21.11.2020 07:50