calculate the number of moles of oxygen atoms present in 128 g of SO2. Atomic mass of S = 32, O = 16.
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no. of moles = mass in grams/ atomic mass
128/32+16×2
128/64
= 2
the answer is 2 moles
128/32+16×2
128/64
= 2
the answer is 2 moles
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