This equations is used to find the number of moles of a substance...
Number of moles = Mass in g (of element or compound) / Mr (or Ar, of element or compound)
For example: How many moles are there in 60g of carbon dioxide
Mr of CO2 = 12 + 16 + 16 = 44
Number of moles = 66 / 44 = 1.5 moles of CO2
The question says that CO2 has 60g, but you have put mass to be 66g in your equation, so shouldn't the answer be 1.36? Am I right?
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