What is the mass of 3.987 mole of AL?

107.649g

Explanation:

To calculate mole

Formulae is

Mole=mass/mass number

Now our parameters are

Mole=3.987mol

Mass number if AL = 27g/mol

Mass=?

You make mass your subject formula

Mass=mole x molar mass

Insert you parameters

Mass = 3.987mol x 27g/mol

Mole will cancel mole

3.987 will multiply 27

Final answer 107.649g

107.649g

Explanation:

Mass of a substance = number of moles of the substance times molar mass of the substance

Here, the substance is aluminum, Al.

Number of moles given = 3.987mol

Molar mass of Al = 27g/mol

Therefore,

Mass of Al = 3.987mol X 27g/mol

= 107.649g