Question

use the reaction to answer the question.

c₁₀h₈ + 12o₂ →?

which products are expected from the reaction?

(1 point)

10co2 + 8h2o

10c + 4h2o + 10o2

10co2 + 4h2o

10co2 + 8h + 2o2

Explanation:

Step1: Analyze the combustion reaction

In a complete combustion of a hydrocarbon (\(C_{10}H_8\)), carbon combines with oxygen to form \(CO_2\) and hydrogen combines with oxygen to form \(H_2O\).

Step2: Balance the carbon atoms

There are 10 carbon atoms in \(C_{10}H_8\). So, the number of \(CO_2\) molecules is 10 (since each \(CO_2\) has 1 carbon atom).

Step3: Balance the hydrogen atoms

There are 8 hydrogen atoms in \(C_{10}H_8\). Each \(H_2O\) has 2 hydrogen atoms. So, the number of \(H_2O\) molecules is \(\frac{8}{2}=4\).

Step4: Check the oxygen atoms

In \(10CO_2\), there are \(10\times2 = 20\) oxygen atoms. In \(4H_2O\), there are \(4\times1= 4\) oxygen atoms. Total oxygen atoms in products \(=20 + 4=24\). In reactants, \(12O_2\) has \(12\times2 = 24\) oxygen atoms. So the balanced equation is \(C_{10}H_8+12O_2
ightarrow10CO_2 + 4H_2O\)

Answer:

C. \(10CO_2 + 4H_2O\)