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4.0 grams of caustic soda contain...

4.0 grams of caustic soda contain

A

`6.02 xx 10^23 ` atoms of H

B

4 gram atoms of Na

C

`6.02 xx 10^22` atoms of Na

D

4 moles of NaOH

Text Solution

Verified by Experts

The correct Answer is:
C
Caustice soda is NaOH (molecular mass = 40) 40g of caustic soda = `6.02 xx 10^23` Na atoms 4g of caustic soda
` = (6.02 xx 10^23 xx 4)/(40) = 6.02 xx 10^22 Na ` atoms
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