Question

a student is performing a chemical reaction. the mass of reactant 1 is 33 grams. the mass of reactant 2 is 57 grams. the reaction produces a solid and a gas. the mass of the solid is 26 grams. what is the mass of the gas? (1 point)
○ 64 grams
○ 90 grams
○ 116 grams
○ 20 grams

Explanation:

Step1: Calculate total mass of reactants

The total mass of Reactant 1 and Reactant 2 is $33 + 57 = 90$ grams.

Step2: Calculate mass of gas

According to the law of conservation of mass, the total mass of products (solid + gas) equals the total mass of reactants. Let the mass of the gas be $m$. So, $26 + m = 90$. Solving for $m$, we get $m = 90 - 26 = 64$ grams.

Answer:

64 grams (corresponding to the option "64 grams")