Chemistry, 28.04.2021 06:30 victoriapellam04
Which reaction can be used to calculate the enthalpy of formation of a substance? I don't know if what I marked is right
Answers: 3
Chemistry, 21.06.2019 22:30
Llama have 74 chromosomes how many chromosomes will they be found in their gametes explain how you know
Answers: 2
Chemistry, 21.06.2019 23:50
Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.
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
Which reaction can be used to calculate the enthalpy of formation of a substance?
I don't know if...
Mathematics, 21.04.2020 22:22
Mathematics, 21.04.2020 22:22
Mathematics, 21.04.2020 22:22