Chemistry, 25.10.2019 02:43 scottcounts757
Of the elements fe, hg, u, te, and y, which is considered a group a element?
Answers: 3
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 15:40
Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n
Answers: 2
Chemistry, 22.06.2019 17:00
Complete each row of the table below by filling in the missing prefix or missing exponent.
Answers: 1
Chemistry, 22.06.2019 18:10
The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.
Answers: 1
Of the elements fe, hg, u, te, and y, which is considered a group a element?...
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