JEE Main Chemistry question

Chemistry Some Basic Concepts of Chemistry JEE Main

1.35 g of pure Ca metal was quantitatively converted into 1.88 g of pure CaO. What is the atomic weight of Ca?

(A)40.75Correct
(B)50
(C)60
(D)70

Answer: (A)

Solution

Mass of O gained g mol, equal to moles Ca (1:1 in CaO). Atomic weight .

Question ID VK-130898