Question

i) Calculate no of moles in
a) 27g of Al.
b) 1.51 x 10^23 molecules of NH4, Cl.

Answer 1

Answer:

a. n = given mass / molar mass

=27/27(approx) =1

b. n= 0.25

Explanation:

n=No of moles

b. n= given molecules / avogadro constant

Avogadro constant = 6.023* 10^(23)