Home
Class 12
CHEMISTRY
The number of water molecules present in...

The number of water molecules present in a drop of water weighing 0.18g is :

A

`6.022 xx 10^26`

B

`6.022 xx 10^23`

C

`6.022 xx 10^19`

D

`6.022 xx 10^21`

Text Solution

Verified by Experts

The correct Answer is:
D
Moles of water in a drop
` = (0.018)/(18) = 1 xx 10^(-3) ` moles
1 mol of water ` = 6.022 xx 10^23` molecules
` 1 xx 10^(-3) ` mole of water
` = 6.022 xx 10^23 xx 1 xx 10^(-3)`
` = 6.022 xx 10^20` molecules
Promotional Banner

Topper's Solved these Questions

  • SOME BASIC CONCEPTS OF CHEMISTRY

    MODERN PUBLICATION|Exercise MULTIPLE CHOICE QUESTION (LEVEL-III)|5 Videos

  • SOLUTIONS

    MODERN PUBLICATION|Exercise Recent Examination Questions|13 Videos

  • STATES OF MATTER

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|12 Videos

Similar Questions

Explore conceptually related problems

The number of water molecules present in a drop of water weighing 0.018g is

Calculate the number of molecules present in one drop of H_(2) O whose mass is 0.01 g b. Calculate the number of molecules leaving the liquid suface per second, if the same drop of water evaporates in one hour.

The geometry of water molecules is same as that of

The number of molecules of CO_(2) present in 44 g of CO_(2) is

The number of silver atoms present in a 90% pure silver wire weighing 10 g is :