1.

49, Weight of 6.023 x 10" atoms of zinc (At, wt. of Zn =65.4) is() 0.645 g(3) 6.54 g(2) 0.0654y(4) 0.00654 g

Answer»

No. of moles in 6.023× 10²¹ atoms is

= 6.023× 10²¹/6.023× 10²³ = 1/100 = 0.01 moles

and 1 moles of zinc has mass = 65.4gm

so, 0.01 moles will have mass = 0.01*65.4 = 0.65gm.

option 1.


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