Three nails have a mass of 3.05 g. how many moles of iron do they contain?

Hello!

Three nails have a mass of 3.05 g. How many moles of iron do they contain?

Data:

3 nails of iron = 3.05 g (by nail)  

The atomic mass of iron is 55.845 amu, so the molar mass is:

M = 55.845 → M ≈ 56 g / mol    

With a simple 3 rule:  

56 g → 1 mol

3.05 g → y mol  

Therefore:

Soon:

3 nails → 3*0.05446 = 0.1638 moles (answer)

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explanation: