Help with a chemistry gcse question!
Part a was easy it was:
A sample of a substance has 1.204*10 to the 25 atoms. How many moles of atoms of the element are there?
We do 1.204*10to the power of 25 divided by Avogadro constant to get 20 moles which is definitely right
B) given that the atoms have a mean mass of 9.3*10 to the power of -23 grams. What is the element?
So I was wandering if mass/ moles = mass number then surely we have to do 9.3*10 to the power of -23 grams/ by the 20 miles from part a? But the answer isn’t correct. Please try to explain it for me too
A sample of a substance has 1.204*10 to the 25 atoms. How many moles of atoms of the element are there?
We do 1.204*10to the power of 25 divided by Avogadro constant to get 20 moles which is definitely right
B) given that the atoms have a mean mass of 9.3*10 to the power of -23 grams. What is the element?
So I was wandering if mass/ moles = mass number then surely we have to do 9.3*10 to the power of -23 grams/ by the 20 miles from part a? But the answer isn’t correct. Please try to explain it for me too
(edited 4 years ago)
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