Question

Suppose a reaction were to happen in an open container in a lab. During the reaction, the scientist observes the chemicals bubble, and produce a gas. During the analysis the scientist notices that the reactants weighed 20 g when he started, and the product weighed 18 g. Explain what happened.

Answer 1

Answer:

gas may be h2 releases as bubble form

Explanation:acc. to law of conservation of mass

reactant mass =product mass but due to open flask one the product which is gas of 2g releases to air

Answer 2

Answer:

Hydrogen H2

Explanation:

The law of conservation of mass states that matter is neither created nor destroyed during a chemical reaction. This means that the number of a particular type of atom on one side of a balanced chemical equation must be equal to the number of that type of atom on the other side of the chemical equation.

according to the law of conservation of mass

the scientist observes the chemicals bubble, and produce a gas..that is released into air that weighs 2grams.that is h2 gas.