Question

calculate number of moles of MgO in 300g and 20 g of compound​

Answer 1

Answer:

1. in 300g =7.5 moles
2. in 20g=1/2 mole

Explanation:

No. of moles= given mass / molecular mass

MgO= 24+16=40

i). 300/40=7.5 moles

ii). 20/40=1/2 moles