During a science exhibition, Class IX students demonstrated a reaction between magnesium ribbon and dilute hydrochloric acid. The experiment was carried out in a conical flask fitted with a rubber stopper and a balloon. Before starting the reaction, the students carefully measured the mass of the entire setup using a digital balance.
As the reaction progressed, bubbles of a gas were produced and the balloon gradually inflated. Even after the balloon expanded, the balance reading remained unchanged. The students concluded that the investigation verified one of the fundamental laws of chemistry proposed by Antoine Lavoisier.
Answer the following questions with the right answer:
1. Even though the balloon became larger, the balance reading remained the same. The best explanation is - .
2. Which conclusion can be drawn from the investigation? - .