AS AQA Chemistry help please?

SimSall

New member
The absolute mass of one ion/g of 12Carbon is 1.993*10^ -23 and its relative abundance is 98.9%, whereas 13Carbon's absolute mass of one ion/g is 2.158*10^ -23 with relative abundance of 1.1%.

What is the mass of one neutron?
What is the relative isotopic mass of Carbon-13?

How on earth do i work these qns out???? thanks!
 
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