Why are fossils
important in the
development of the
geologic time scale?...
Answers: 2
Chemistry, 22.06.2019 00:00
What is the result of multiplying (2.5 ร 1010) ร (2.0 ร 10-7)? a. 5.0 ร 103 b. 5.0 ร 10-3 c. 5.0 ร 1017 d. 5.0 ร 10-17
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 09:20
What happened to the amount of carbon dioxide in the atmosphere from 2010โ2017?
Answers: 1
Chemistry, 22.06.2019 14:30
An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.
Answers: 3
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Mathematics, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Computers and Technology, 26.07.2019 03:00
Chemistry, 26.07.2019 03:00
History, 26.07.2019 03:00
History, 26.07.2019 03:00
Business, 26.07.2019 03:00
Biology, 26.07.2019 03:00