The gases that have the same molecular weight and cannot be separated on the basis of weight alone during mass spectroscopy include which of the following?
a. N2 and O2 c. CO2 and N2
b. N2O and O2 d. N2O and CO2
ANS: D
CO2 and N2O have the same molecular weight and are not able to be separated on the basis of molecular weight, which can lead to erroneous readings. This problem is overcome by ionizing N2O to N2O+ and CO2 to C+.
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