Question:
what is the no. of molecules of co2 present that contains 8gram of o2 ?
Answer:
32 gms of oxygen are present in 1 mole of CO2
8 grams of oxygen will be in (1 x 8)/32 moles of CO2 = 0.25 moles
1 mole = 6.023 x 1023 molecules
Thus, 0.25 moles = 6.023 x 1023 x 0.25 molecules
= 1.5 x 1023 molecules contains 8 grams of O2.
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