SOLUTION: How many molecules are there in 56 mg's HCN? Please help? Thanks

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Question 833068: How many molecules are there in 56 mg's HCN?
Please help? Thanks

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the molecular weight of HCN.
From the mass of your sample and the molecular weight, find out how many moles of HCN you have.
One mole has 6.023%2A10%5E23 molecules in it.
N=%28W%2FMW%29%2A6.023%2A10%5E23