109.4g $Mg$ contains how many moles?

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Answer 1 · 2018-06-16T08:35:48

Well, what is the atomic mass of magnesium metal?

Is it not $24.31*g*mol^-1$ . How did I know this? Did I know the mass from the top of my head?

And so we take the quotient, $"Mass of stuff"/"molar mass of stuff"$

$-=(109.4*cancelg)/(24.31*cancelg*mol^-1)=4.50*1/(1/(mol))=4.50*mol$

109.4g MgMg contains how many moles?