Question

the equation below is for potassium oxide.
4k + o₂ → 2k₂o
what is the ratio of atoms of potassium to atoms of oxygen?
○ 1:2
○ 2:1
○ 4:1
○ 1:4

Explanation:

Step1: Count K atoms

In the equation \(4\text{K} + \text{O}_2
ightarrow 2\text{K}_2\text{O}\), the number of K atoms is 4 (from \(4\text{K}\)).

Step2: Count O atoms

For O, in \(\text{O}_2\), there are \(2\) O atoms (since subscript 2 means 2 atoms per \(\text{O}_2\) molecule).

Step3: Find the ratio

Ratio of K to O atoms: \(4:2 = 2:1\) (simplify by dividing both by 2).

Answer:

2:1