If 10 21 molecules are removed from 200 mg of CO2 , then the number of moles of CO2 left are
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2
0.2/44 moles of CO2 - 10^21/ 6 x 10^23 =0 .0028 moles of CO2
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0
Answer:
Answer:-
Molar mass of CO
2
= 44g
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
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