1.

4.0 grams of caustic soda contain

Answer»

`6.02 xx 10^23 ` atoms of H
4 gram atoms of Na
`6.02 xx 10^22` atoms of Na
4 moles of NaOH

Solution :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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