Table of contents

22. Organic Chemistry

Intro to Hydrocarbons

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Multiple Choice

Write the molecular formula for an alkane with 5 C atoms.

$C_5H_{12}$

$C_5H_{10}$

$C_5H_{14}$

$C_5H_8$

Verified step by step guidance

Understand that alkanes are hydrocarbons with only single bonds between carbon atoms, following the general formula C_nH_2n+2.

Identify the number of carbon atoms (C) in the alkane, which is given as 5.

Substitute the number of carbon atoms (n = 5) into the general formula for alkanes: C_nH_2n+2.

Calculate the number of hydrogen atoms (H) using the formula: H = 2n + 2. For n = 5, this becomes H = 2(5) + 2.

Write the molecular formula for the alkane by combining the number of carbon and hydrogen atoms: C₅H₁₂.

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