A 2.241 g preview of nickel react next to oxygen to form 2.852 g of the metal oxide.?

A 2.241 g sample of nickel reacts next to oxygen to form 2.852 g of the metal oxide. Calculate the empirical formula of the oxide.
Answers:
The nickel oxide thus formed has a mass of 2.852 grams, of which
2.241 grams are nickel and the remaining 0.611 gram is oxygen.
To find the mole fraction of each factor, divide its mass in grams
by its atomic weight: for nickel we return with 2.241/58.7 = 0.0381 mole
For the oxygen, divide 0.611 by 16 and we get 0.0381 mole.
These mole fractions are the same, so we hold the elements nickel
and oxygen in a 1 to 1 ratio.
The empirical formula is NiO.
Hope this answers your question. Source(s): college chemistry

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