Question

q 8. the equation below shows a chemical reaction. according to the law of conservation of mass, what will be the mass (in grams) of carbon dioxide (co₂) formed in the product? 2c₂h₆ + 7o₂ → 4co₂ + 6h₂o 2.5 grams 9.31 grams? 4.49 grams enter your answer below.

Explanation:

Step1: Recall law of conservation of mass

The law of conservation of mass states that the total mass of reactants equals the total mass of products in a chemical reaction.

Step2: Calculate total mass of reactants

The mass of reactants is the sum of the mass of $C_2H_6$ and $O_2$. Mass of $C_2H_6 = 2.5$ grams and mass of $O_2=9.31$ grams. So, total mass of reactants $=2.5 + 9.31=11.81$ grams.

Step3: Calculate mass of carbon - dioxide

Let the mass of $CO_2$ be $x$ grams. The mass of $H_2O$ is $4.49$ grams. According to the law of conservation of mass, mass of reactants = mass of products. So, $x+4.49 = 11.81$.

Step4: Solve for $x$

$x=11.81 - 4.49$.
$x = 7.32$ grams.

Answer:

$7.32$ grams