Question

use the following balanced equation to answer the questions: 2mg + o₂ → 2mgo. there are 2 moles of mg present. the molar mass of magnesium is 24.31 g/mol. what mass of magnesium is present?

Explanation:

Step1: Recall mass - mole relationship formula

The formula for calculating mass ($m$) from moles ($n$) and molar mass ($M$) is $m = n\times M$.

Step2: Identify values of $n$ and $M$

We know that $n = 2$ moles (moles of Mg) and $M=24.31$ g/mol (molar mass of Mg).

Step3: Calculate the mass

$m=2\ mol\times24.31\ g/mol = 48.62$ g.

Answer:

48.62 g