Question

how may moles of magnesium are in 524g mg?
a 21.6 moles mg
b. 12738 moles mg
c 8.70x10^23 moles mg
d 1.30x10^25 moles mg

Explanation:

Step1: Recall molar - mass formula

The formula to calculate the number of moles $n$ is $n=\frac{m}{M}$, where $m$ is the mass and $M$ is the molar mass. The molar mass of magnesium ($Mg$) is approximately $M = 24.31\ g/mol$.

Step2: Substitute values

Given $m = 524\ g$ and $M=24.31\ g/mol$, then $n=\frac{524\ g}{24.31\ g/mol}\approx21.6\ mol$.

Answer:

A. 21.6 moles Mg