Question

question 9. a 10.0 - g sample of magnesium reacts with oxygen to form 16.6 g of magnesium oxide. how many grams of oxygen reacted? answer: blank grams

Explanation:

Step1: Apply mass - conservation principle

According to the law of conservation of mass, the mass of reactants equals the mass of products. Let the mass of oxygen be $x$. The mass of magnesium is 10.0 g and the mass of magnesium oxide is 16.6 g. So, $10.0 + x=16.6$.

Step2: Solve for the mass of oxygen

$x = 16.6 - 10.0$.

Answer:

6.6