Question

Number of moles present in 3.08g of BaSO4.​

Answer 1

Answer:

0.013moles

Explanation:

To calculate the number of moles present, we use the following formula:

Mole=mass in grams/molar mass

now we know the "mass in grams" which is 3.08grams

what we need to calculate is the molar mass

molar mass = atomic mass × number of atoms present

Atomic mass of Ba = 137.327amu

Atomic mass of S = 32.06amu

Atomic mass of O = 16amu

=137.327+32.06+16×4 (since there are 4 atoms of Oxygen (O) present, we will multiply the atomic mass by 4)

=233.38g

Now we can substitute this Value into the formula which is used to find the number of moles

= mass in grams / molar mass

= 3.08 grams / 233.38 grams

= 0.013moles