Question

under certain conditions, zinc oxide and water combine to form zinc hydroxide. zinc oxide + water → zinc hydroxide 30.4g 6.7307g if 30.4 grams of zinc oxide and 6.7307 grams of water combine to form zinc hydroxide, how many grams of zinc hydroxide must form?

Explanation:

Step1: Apply law of conservation of mass

According to the law of conservation of mass, the total mass of reactants equals the total mass of products in a chemical reaction.

Step2: Calculate mass of product

The mass of zinc oxide is 30.4 grams and the mass of water is 6.7307 grams. The mass of zinc hydroxide (product) is the sum of the masses of zinc oxide and water. So, $m = 30.4+6.7307$.
$m=37.1307$ grams

Answer:

37.1307 grams