The mass of 1.5×10^23 atoms of oxygen
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mass of o
= 1.5 ÷ 6.23 = 1/ 4 = .25 = mass. = .25 ×16 = 400 gram
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Mass=GMM * No of particles / Avagadro's number.
Mass= 16 * 1.5 * 10*23/6.023*10*23
Mass =3.98g
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