Question

5.00 g of magnesium represents how many moles?

Answer 1

Number of moles = mass / molecular mass

Molecular mass of Mg = 24.3 g/mol

n = 5g / 24.3 g/mol
= 0.206 moles

Answer 2

Answer: The number of moles of magnesium in given amount is 0.2056 moles.

Step-by-step explanation:

To calculate the number of moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}`

We are given:

Given mass of magnesium = 5 g

Molar mass of magnesium = 24.31 g/mol

Putting values in above equation, we get:

`\text{Moles of magnesium}=(5g)/(24.31g/mol)=0.2056mol`

Hence, the number of moles of magnesium in given amount is 0.2056 moles.