Question

In a reaction between two substances bubbles form. The mass before the reaction was more than the mass after the reaction. What would have caused the masses to be different?

a) Loss of gas
b) Gain of gas
c) No change in mass is possible in a chemical reaction
d) Change in temperature

Answer 1

The formation of bubbles in a chemical reaction can cause a difference in mass before and after the reaction. This is typically due to the loss or gain of gas.

Step-by-step explanation:

In a reaction between two substances, the formation of bubbles can result in a difference in mass before and after the reaction. This is typically due to the loss or gain of gas. When bubbles form, they are often composed of gas that is generated during the reaction. If gas is released from the reaction, the mass after the reaction will be less than the mass before the reaction, indicating a loss of gas (option a). Conversely, if gas is absorbed or produced during the reaction, the mass after the reaction will be greater than the mass before the reaction, indicating a gain of gas (option b).