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Answer» The molar MASS of OXYGEN is 32g. Thus, there are 6.022 X 1023 molecules of O2 in 32g of O2.
So
32g of O2 = 6.022 X 1023 molecules of O2
1g of O2 = (6.022 X 1023 / 32) molecules of O2
40g of O2 = (6.022 X 1023 X 40) / 32 molecules of O2
= 7.5275 X 1023 molecules of O2
Thus, there are 7.5275 X 1023molecules of O2 in 40g of O2. Now, the molar mass of carbon dioxide gas (CO2) is 44G. Thus, there are 6.022 X 1023 molecules of CO2 in 44g of CO2. So
mass of 6.022 X 1023 molecules of CO2 = 44g
mass of 1 molecule of CO2 = 44 / (6.023 X 1023) g
So, mass of 7.5275 X 1023 molecules of CO2 = (44 X 7.5275 X 1023) / (6.022 X 1023) g of CO2
= 55g of CO2
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