Question

The weight of 1 × 10²² molecules of CuSO₄.5H₂O is _______.
(A) 41.59 g
(B) 415.9 g
(C) 4.159 g
(D) none of these

Answer 1

Answer:

no of molecules formula =moles ×avagordo no

hence ,mass /215 × avagordo number =1×10power 22 its gives answer

Answer 2

Dear Student,

◆ Answer -

(B) 415.9 g

● Explanation -

Molecular mass of CuSO₄.5H₂O is calculated as -

Molecular mass = 63.5 + 32 + 4×16 + 10×1 + 5×16

Molecular mass = 249.5 g

Weight 1 × 10²² molecules of CuSO₄.5H₂O is -

Weight = molecular mass × given no of molecules / Avogadro's number

Weight = 249.5 × 1×10²² / 6.022×10²³

Weight = 415.9 g

Therefore, weight of 10²² molecules of CuSO₄.5H₂O is 415.9 g.

Thanks dear...