Question

1. according to the law of conservation of mass, if you start a chemical reaction with 50 grams of one substance and 50 grams of another, how many grams do you have after the reaction, assuming nothing is added or lost? 25 grams 50 grams 75 grams 100 grams

Explanation:

Step1: Recall law of conservation of mass

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction. So the total mass before the reaction equals the total mass after the reaction.

Step2: Calculate total initial mass

The initial mass is the sum of the masses of the two substances. Given 50 grams of one substance and 50 grams of another substance, the total initial mass $m_{initial}=50 + 50=100$ grams.

Step3: Determine final mass

Since mass is conserved and nothing is added or lost, the total mass after the reaction $m_{final}=m_{initial} = 100$ grams.

Answer:

100 grams