Question

Calculate the number of mole in 80gm NaOH?

Answer 1

Answer:

2 moles

Explanation:

The RAM mass of NAOH= 40g which is contained in 1 mole

therefore 40gm=1mole

               80gm=? then you cross multiply to get

(80x1)/40= 2 moles

           

Answer 2

Answer:

2 moles

Explanation:

weight of Na = 23

weight of O. = 16

weight of H. = 1

now , weight of NaoH molecule = 23+16+1=40

so in 40 gm of NaOH has one mole

then 80 gm of NaOH has 2 moles