Question

calculate the molairity of a solution containing 4gm of NaOH​

Answer 1

Molarity = no. of moles/Amount of solution( in litres)

NaOH molar mass = 23 + 16+ 1 = 40 g

No. of moles in 4 g = 4/40

= 0.1 mole

Amount of water is not given

So, I am taking 0.5 litres

Molarity = 0.1/0.5

= 0.2 M

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Answer 2

Answer:

0.4Molarity =  

Vol

Moles

​  

×1000

=  

250

4/40

​  

×1000

=0.4M

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