Question

What is the mass of 0.80 moles of Mg? (1 point)

a
7.5 x 1023 grams

b
4.8 x 1023 grams

c
30 grams

d
19 grams

Answer 1

m = 19 grams

Step-by-step explanation:

Given that,

No. of moles, n = 0.8

The molar mass of magnesium, M = 24.305 u

We need to find the mass of 0.80 moles of Mg. We know that given mass to the molar mass is equal to no of moles. Let the mass is m. So,

`n=(m)/(M)\\\\m=n* M\\\\m=0.8* 24.305 \\\\m=19.444\ \text{grams}`

or

m = 19 grams

So, the mass of 0.8 moles of Mg is 19 grams.