Alkanes share a general chemical formula of C_nH₂_n₊₂.What is n of an alkane with a molar mass in the range of 125-130 g/mol?

Question

Quizplus · Accepted Answer

The molar mass range of 125-130 g/mol corresponds to an alkane with 9 carbon atoms. This can be determined by calculating the molar mass of C9H20, the alkane with the closest molar mass range to 125-130 g/mol. C9H20 has a molar mass of approximately 128 g/mol, so n in the general chemical formula C_nH₂_n₊₂ must be equal to 9. Therefore, the answer is B.

Alkanes Share a General Chemical Formula of CnH2n+2

Alkanes Share a General Chemical Formula of C_nH₂_n₊₂