Part A) Write the chemical formula for cobalt (II) selenate hexahydrate Part B) The oxidation state of oxygen in sodium peroxide, Na2O2, is: (a) 0 (b) -1 (c) +1 (d) -2 (e) +2 Part C) The oxidation state of chromium in CrAsO4 is: (a) 0 (b) +1 (c) +2 (d) +3 (e) -3
Part A) Write the chemical formula for cobalt (II) selenate hexahydrate
Part B) The oxidation state of oxygen in sodium peroxide, Na2O2, is:
(a) 0 (b) -1 (c) +1 (d) -2 (e) +2
Part C) The oxidation state of chromium in CrAsO4 is:
(a) 0 (b) +1 (c) +2 (d) +3 (e) -3
Part D) How many moles of ions per liter are there in a 26.00% by mass aqueous sodium chloride solution (density of solution is 1.194 g/mL at 25oC)?
(a) 0.4801 M (b) 8.90 M (c) 0.2434 M (d) 10.6 M
(e) None of those, if so what is your answer?
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