Question

a chemical reaction occurred when 2 grams of baking soda were mixed with 2 grams of vinegar. what was the total mass of the substances, including the gas that went into the air? mass before: 4g mass after: 8g mass before: 8g mass after: 4g mass before: 4g mass after: 4g

Explanation:

Step1: Calculate initial mass

The initial mass is the sum of the mass of baking - soda and vinegar. Given 2 grams of baking - soda and 2 grams of vinegar, so the initial mass $m_{initial}=2 + 2=4$ g.

Step2: Apply law of conservation of mass

According to the law of conservation of mass, in a chemical reaction, the total mass of reactants is equal to the total mass of products. So the mass after the reaction $m_{final}=m_{initial}=4$ g.

Answer:

Mass before: 4g Mass after: 4g