Question

calculate the number of molecules in 0. 05gram of water​

Answer 1

Answer:

HEY MATE YOUR ANSWER IS..

Explanation:

H2O ATOMIC MASS=18u.

the number of molecules in 0. 05gram.

the number of avagadro number=6.022*10^23.

hence,

6.022*10^23*0.05*18

=5.1498*10^23.molecules..

hope it's helps...

Answer 2

Answer:

No. of moles = No.of molecules / Avogadro Number

So, No.of moles = Mass/ Molar mass

=0.05÷18

=0.00277 moles.

No. of molecules =0.00277× Avogadro Number

=0.00277×6.023×10^23

Hence,no.of molecules of water =1.6683× 10^21

HOPE THIS HELPS...