Question

1. the candle is made of paraffin wax, $c_{25}h_{52}$. build the chemical equation for the combustion reaction that occurs when the candle burns. $c_{25}h_{52}+?\to?+?$. choices: o, $h_{2}o$, $o_{2}$, $co_{2}$, c, co, $ch_{4}$, $ho_{2}$

Explanation:

Step1: Identify the type of reaction

Combustion of a hydrocarbon (like \( \text{C}_{25}\text{H}_{52} \)) requires oxygen (\( \text{O}_2 \)) as a reactant. So the first blank (reactant) should be \( \text{O}_2 \).

Step2: Determine the products of combustion

The complete combustion of a hydrocarbon produces carbon dioxide (\( \text{CO}_2 \)) and water (\( \text{H}_2\text{O} \)). So the products are \( \text{CO}_2 \) and \( \text{H}_2\text{O} \).

Answer:

\( \text{C}_{25}\text{H}_{52} + \boldsymbol{\text{O}_2}
ightarrow \boldsymbol{\text{CO}_2} + \boldsymbol{\text{H}_2\text{O}} \) (The choices for the blanks are \( \text{O}_2 \) (second choice), \( \text{CO}_2 \) (fourth choice), and \( \text{H}_2\text{O} \) (second from first choice) respectively.)