|Question 17Verbal

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Text
In a chemical reaction, the value known as molar mass helps convert between the mass of the reactants and the mass of the product. The gaseous        masses of 42.08 and respectively.
Which choice completes the text so that it conforms to the conventions of Standard English?
compounds propylene and propane have molar
A
compounds, propylene and propane have molar
B
compounds propylene and propane, have molar
C
compounds, propylene and propane, have molar
D