Question

4g of sodium hydroxide is dissolved in 36g of water calculate mole fractions of NaOH and water​

Answer 1

Answer:

Number of moles of NaOH = 4/40 = 0.1 moles.

Explanation:

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Answer 2

Mass of NaoH = 4g

No. of moles of NaoH = 4/40g = 0.1mol

Mass of h2o = 36g

Moles of h2o= 36/18g= 2mol

Mole fraction of h2o= No. of moles of h2o/ No. of moles of h2o + no. Of moles of NaoH

2/ 2+0.1 = 0.95

Mole fraction of NaoH = 0.047