1.

What is the weight fraction of N2 in a gas when it is liquefied? The gas contains 400 ppm of N2 in CO2.

A. 2.54√ó10-4
B. 3.54√ó10-4
C. 4.54√ó10-4
D. 5.54√ó10-4
Answer» B. 3.54‚Äö√†√∂‚àö‚â•10-4


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