Question

question 3
1 pts
what is the formula for
selenium hexachloride?

question 4
1 pts
what is the formula for
phosphorus pentachloride?

Explanation:

Step1: Recall element symbols

Selenium is \(Se\), chlorine is \(Cl\), phosphorus is \(P\).

Step2: Interpret prefixes

Hexa - means 6, penta - means 5.

Step3: Write formulas

For Selenium Hexachloride: \(SeCl_6\)
For Phosphorus Pentachloride: \(PCl_5\)

Answer:

Selenium Hexachloride: \(SeCl_6\)
Phosphorus Pentachloride: \(PCl_5\)