if mass percent of X in XO2 was 80 percent, how much will be X mass percent in XO?
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Expert's answer
2012-12-24T12:11:28-0500
XO2 is 100 % and X is 80,so 2O is 20 % & 2 atoms of Oxygen has molecular weight 16+16=32& (and it is 20 %) Now you can find molecular weight of X using the proportion:
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