What is the maximum mass, in grams, of magnesium oxide that can be formed when 4.8 g of magnesium reacts with oxygen? A. 12.8 B. 4.8 C. 8.0 D. 11.2

Question

Answer 1

### C. 8.0

Answer 2

## Step1: Determine the balanced chemical equation for the reaction### The balanced equation for the reaction between magnesium (

) and oxygen (

) is:

## Step2: Calculate moles of magnesium### The molar mass of Mg is 24.3 g/mol. The moles of

magnesium are:

## Step3: Use stoichiometry to find moles of MgO### From the balanced equation, the molar ratio of Mg to MgO is 1:1:

## Step4: Calculate the mass of MgO formed### The molar mass of MgO is

. The mass of MgO formed is:

## Step5: Determine the closest answer choice### The closest choice to

is option C:

Question