Question

Calculate the number of moles in each of the following masses: a. 64.1 g of aluminum

Answer 1

Answer:

molar mass of Al= 27 grams

Mass of Al= 64.1

moles of Al = mass of Al given in gramss/ molar mass of Al so

moles of Al= 64.1/27

Ans 2.37

Answer 2

Answer:

The number of moles of aluminum in 64.1g of its mass will be equal to 2.38 moles.  

Explanation:

Given the mass of aluminum, $m=64.1grams$

To find the number of moles, we divide the given mass of the element by its atomic mass.

Now, the atomic mass of aluminum $=26.9gmol^{-1}$

Therefore Number of moles of Al $=\frac{64.1g}{26.9gmol^{-1}}$

          Number of moles of Al $=2.38moles$

Therefore, the number of moles of Al is $2.38moles.$