From 200 mg of CO2,1021molecules are removed. How many mg of CO2 is left?
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Answer:
One mole of atoms =6.023×10
23
atoms = Gram atomic mass of element
44 grams of CO
2
=1moleCO
2
=6×10
23
molecules of CO
2
200mg=
44×1000
200×1
moles=
44×1000
200×10
23
×6.023 molecular of CO
2
=27.37×10
20
molecular of CO
2
=2.737×10
21
molecules of CO
2
molecules left =1.737×10
21
molecular of CO
2
moles of CO
2
left =
6.023×10
23
1.737×10
4
=0.29×10
−2
moles of CO
2
=2.9 mill moles
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