Question

1.05 - test review - counting atoms

2h₂o → 2h₂ + o₂

? g 10.28 g 10.08 g

according to the law of conservation of mass, what will be the mass of the water (to the nearest hundredth)?

Explanation:

Step1: Recall Law of Conservation of Mass

The Law of Conservation of Mass states that the total mass of reactants equals the total mass of products. For the reaction \(2H_2O
ightarrow 2H_2 + O_2\), the mass of \(H_2O\) (reactant) should equal the sum of the masses of \(H_2\) and \(O_2\) (products).

Step2: Calculate total mass of products

Mass of \(H_2 = 10.28\) g, mass of \(O_2 = 10.08\) g. Sum them: \(10.28 + 10.08 = 20.36\) g.

Answer:

20.36 g