Question

out of 6.02×10 to the power of 22 N2 molecules 700 mg are removed how many grams of H2 is required to convert N2 into NH3​

Answer 1

Answer:

Given mass = 200 mg = 0.2g

Number of moles =

44

0.2

=

220

1

Number of moles=

Avogadro’s number

number of molecules

⇒Number of molecules=Avogadro’s number×number of moles

⇒No. of molecules=6.022×10

23

×

220

1

=2.73×10

21

Molecules in

220

1

moles

As 10

21

molecules are removed,

∴ No. of molecules left = 2.73×10

21

−10

21

=1.73×10

21

∴ No. of moles=

Avogadro’s number

No. of molecules

=

6.23×10

23

1.73×10

21

=2.88×10

−3

Hence, option A is correct.