Saturday, 19 March 2016

1.19 carry out mole calculations using relative atomic mass (Ar) and relative formula mass (Mr)

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
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2 comments:

  1. Unknown22 May 2018 at 09:28

    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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    1. Unknown31 May 2018 at 03:27

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