Question

13 multiple choice 6 points
choose the correct chemical formula for the following compound: gold (ii) oxide
auo
auo₂
ago
au₂o
14 multiple choice 6 points
choose the correct chemical formula for the following compound: potassium nitride
kn⁻³
kn₃
kn
k₃n
15 multiple choice 6 points
choose the correct chemical formula for the following compound: tin (iv) oxide
sn₂o₄
sno₄
sno₂
sn₂o

Explanation:

Step1: Determine the charge of gold (II) and oxide

Gold (II) has a charge of \(Au^{2+}\), oxide has a charge of \(O^{2 -}\).

Step2: Balance the charges

Using the criss - cross method, the formula is \(AuO\).

Step3: Determine the charge of potassium and nitride

Potassium has a charge of \(K^{+}\), nitride has a charge of \(N^{3-}\).

Step4: Balance the charges

Using the criss - cross method, the formula is \(K_{3}N\).

Step5: Determine the charge of tin (IV) and oxide

Tin (IV) has a charge of \(Sn^{4+}\), oxide has a charge of \(O^{2 -}\).

Step6: Balance the charges

Using the criss - cross method, the formula is \(SnO_{2}\).

Answer:

1. AuO
2. \(K_{3}N\)
3. \(SnO_{2}\)