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How many H(2)O molecules are there in a ...

How many `H_(2)O` molecules are there in a snowflake weighing 1 mg?

A

`3.35xx10^(19)`

B

`6.023xx10^(23)`

C

`3.35xx10^(19)`

D

100

Text Solution

Verified by Experts

The correct Answer is:
A
1 mg `H_(2)O`
Molar mass of `H_(2)O`=2+16=18g
1 Mole contains `6.023 xx 10^(23)` water molecule
18 g contains `6.023 xx 10^(23)` water molecule
`:.` 1 mg contains `(6.023xx10^(23))/18xx1g//1000mg=3.35xx10^(19)H_(2)O` molecule.
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FULL MARKS-BASIC CONCEPTS OF CHEMISTRY AND CHEMICAL CALCULATIONS -Additional Questions Solved(Choose the correct)
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