Question

The Number of atoms is maximum in — a) 18 gram of H2O
b) 18 gram of O2
c) 18 gram of Co2
d) 18 gram of CH4


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Answer 1

Answer:

d. 18 gram of H2O

Explanation:

Hope it helps you

Answer 2

Explanation:

mole= given mass/ molecular mass so

a) mole of H2O is 18/18 = 1 (here 18 is molecular mass of H20)

1 mole of h2o contains 6.023*10^23 h2o

there are 3 atoms here 2 of h and 1 of o so total no. of atoms in 18 gram of h2o will be

18.069*10^23

b) mole of O2 = 18/36=1/2

2 atoms are in O2 so total no of atoms in 18 gram of O2 will be

2*1/2*6.022*10^23 = 6.022*10^23

c) mole of CO2 =18/44

three atoms are in CO2 so atoms in 18 gram of CO2 will be (3*18*6.023*10^23)/44

on simplifying we get

1.227*6.023*10^23

d) mole of CH4 =18/16 = 1.125

5 atoms are in CH4, one of carbon and 4 of hydrogen so in 18 gram of CH4 total no. of atoms will be

1.125*5*6.023*10^23

on simplifying we get 5.625*6.023*10^23

so maximum no. of atoms are in CH4 = 5.625*avogadro's no.

THEN IN H20 = 3*avogadro's no.

then in CO2 = 1.227*avogadro's no.

then atlast O2 have least atom which is 1*avogadro's no.