Calculate the mass percentage of each element present in 1mole of H2 O2
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mass no.÷atomic no. ×100
m.no. of h2 =1×2÷18×100=11.1 %
mass no. of o2=16÷18×100=88.8%
m.no. of h2 =1×2÷18×100=11.1 %
mass no. of o2=16÷18×100=88.8%
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