Question

a student is investigating a reaction between zinc and hydrochloric acid. The reaction produces hydrogen gas and a solution of zinc chloride. how would you expect the mass of the flask and it's contents to change over the course of the reaction? Explain your answer

Answer 1

The mass would become more.
Zinc is displacing the hydrogen gas which gets removed.
As Zinc is heavier then hydrogen the moleculer weight will become more.

Hope This Helps!