Question

The question that I have is in the photo

Answer 1

Answer: 56.1 g

Step-by-step explanation:

We begin by finding the formula mass of KCl.

• The atomic mass of K is 39 g/mol.
• The atomic mass of Cl is 35.5 g/mol.
• So, the formula mass of KCl is
  `39+35.5=74.5` g/mol.

Therefore, 87.0 grams of KCl is equal to
`(87.0)/(74.5)=1.167785` moles.

From the reaction, we know that for every 2 moles of KCl produced, 3 moles of diatomic oxygen are produced. This means that there are
`1.167785(3/2)=1.7516775` moles of diatomic oxygen.

The formula mass of diatomic oxygen is 32 g/mol, meaning
`(1.7516775)(32)=56.1` grams of diatomic oxygen were produced.