Question

Calculate the number of moles in: 147 g BaF 2

Answer 1

To solve the question we need to:

Step 1 - Calculate the molar mass of BaF2

Step 2 - Use the following formula: moles = mass/molar mass

Step 1:

Atomic mass of Ba is 137.33 g/mol

Atomic mass of F is 19 g/mol

We can find these values at periodic table.

We multiply the atomic mass by the quantity of atoms of each element:

(1x137.33) + (2x19) = 175.33 g/mol

So the molar mass of BaF2 is 175.33 g/mol

Step 2:

moles = mass/molar mass

moles = 147/175.55

moles = 0.838 moles

Answer: 0.838 moles of BaF2