Question

What is the number of moles in 15.0 g AsH3?

O 5.2 mol
O 1200 mol
O 0.44 mol
O 0.19 mol

Answer 1

n = 0.19 mol

Step-by-step explanation:

Given mass = 15 g

The molar mass of AsH₃ = 77.94 g/mol

We need to find the number of moles in 15 g of AsH₃. We know that,

No. of moles = given mass/molar mass

`n=(15)/(77.94 )\\\\n=0.19\ mol`

So, there are 0.19 g/mol. Hence, the correct option is equal to 0.19 mol.