Question

how many molecules of NaOH are present in 120g NaOH ? ( atomic mass of Na is 23u ) ​

Answer 1

Answer:

molecular mass of NaOH = 40u

total amount of sample=120g

so total no. of mole of NaOH=given wt./molecular wt

which is equal to 120/40=

3 mole of NaOH