Question

Q5.) How many moles of sodium atoms correspond to 1.56×1021 atoms of sodium?​

Answer 1

Answer:

The number of moles is equal to the number of particles of a substance in a given sample divided by the Avogadro's number.

Moles = Number of sodium atoms/ Avogadro's number

Sodium atoms = 1.56 x 10^21

Avogadro number = 6.022 x 10^23

Moles = 1.56 x 10^21 / 6.022 x 10^23

Moles = 0.26 x 10^-2

So, there are 0.26 x 10^-2 moles of sodium in 1.56 x 10^23 atom.

Answer 2

sodium atoms =1.56×1021

avogadro numbar =6.022×1023

moles=1.56×1021/6.022×1023

moles=0.26×10-2