Question

How many moles are 35 g of PCI3

Answer 1

0.255 moles

Step-by-step explanation:

• The relationship between moles, mass and the molar mass of a compound is given by;

`Moles=(mass)/(molarmas)`

• Molar mass of a compound is equivalent to the relative formula mass of a compound that is calculated by adding the atomic masses of atoms making the compound.

In our case.

We are given the compound PCl₃ whose;

Mass is 35 g

Molar mass is 137.33 g/mol

But;
`Moles=(mass)/(molarmas)`

Therefore;

`Moles,PCl_(3)=(35g)/(137.33 g/mol)`

= 0.255 moles

Therefore, 35 g of PCl₃ contains 0.255 moles