Chemistry, 12.07.2019 12:10 tshort2000oyreb1
The elements in group 7a are known by what name? transition metals halogens alkali metals alkaline earth metals noble gases
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 06:00
How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025
Answers: 3
Chemistry, 22.06.2019 12:00
What is the lowest number energy level where a d sublevel is found
Answers: 1
The elements in group 7a are known by what name? transition metals halogens alkali metals alkaline...
Social Studies, 10.07.2019 01:00
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History, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
History, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00
Social Studies, 10.07.2019 01:00