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The density of a liquid is 1.2 g/mL. The...

The density of a liquid is 1.2 g/mL. There are 35 drops in 2 mL. The number of molecules in one drop are (molar mass of liquid=70)

A

`((1.2)/(35 ))N_A`

B

`((1)/(35 ))^2 N_A`

C

`(1.2 )/((35)^2)N_A`

D

`1.2 N_A`

Text Solution

Verified by Experts

The correct Answer is:
C
`(1.2 )/((35)^2)N_A`
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The density of liquid (mol.wt. = 70 ) is 1.2 g mL^(-1) . If 2 mL of liquid contains 35 drops, the number of molecules of liquid in one drop are: