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Reported Question / Answer
Q.) The first step in the production of nickel from its ore, NiS, is to roast it in the presence of oxygen to form the metal oxide and . What is the coefficient of oxygen when the equation for this reaction is completed and balanced?
1)
2
2)
1
3)
5
4)
3
5)
NULL
Answer :
4
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Human Verification : Answer 2 + 3 = ?
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