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What do we call the hydrocarbon that has formula #C_5H_12# that CONTAINS only methyl hydrogens? #"A. Isopentane;"# #"B. Neopentane;"# #"C. 2,2-dimethylpentane;"# #"D. n-pentane."#

Answer 1

#"B. Neopentane"#

#"Neopentane"# #-=# #C(CH_3)_4#. Here, all the hydrogens are bound to a primary carbon centre. The central carbon is quaternary and bound to 4 carbons.

In order to confirm the other molecules' connectivity, you should sketch their structures.

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Answer 2

Lucy Alessi

C. 2,2-dimethylpentane.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.