Question

what is the mass for the miss formula below? (do not label the answer) 2al + 3o → al₂o₃ 45 g ? 100 g

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: Set up the equation

Let the mass of oxygen be $x$. The mass of aluminum is 45 g and the mass of aluminum - oxide is 100 g. So, $45 + x=100$.

Step3: Solve for $x$

$x = 100 - 45$.

Answer:

55