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A mixture of hydrogen and oxygen contains 20% by mass of hydrogen. What is the total number of molecules present per gram of the mixture?

Answer»


SOLUTION :In 1 gram of the mixture 0.2g of HYDROGEN and 0.6g of OXYGEN are PRESENT. Moles of `H_(2)=(0.2)/(2)=0.1`. Moles of oxygen `=(0.8)/(32)=0.025`. Calculate the number of molecules of hydrogen and oxygen and then add.


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