A sample of pure Ca metal weighing 1.35 grams was quantitatively converted to 1.88 grams of pure Cao. What is the atomic weight of Ca? (O = 16)

A sample of pure Ca metal weighing 1.35 grams was quantitatively conve

1.	A sample of pure Ca metal weighing 1.35 grams was quantitatively converted to 1.88 grams of pure Cao. What is the atomic weight of Ca? (O = 16)
Answer» Solution :From the formula of Cao, we know, moles of CA = moles of O `("weight of Ca")/("atomic wt. of Ca")= ("weight of O")/(" atomic wt. of O")` `(1.35)/(at. wt. of Ca.) = ( 1.88 - 1.35)/(16)` Atomic weight of Ca = 40-75.