Write the formulae of compounds with the following information and the names of the molecules.

Options

A. 2 phosphorus atoms 5 oxygen atoms.
B. 1 calcium atom 2 oxygen atoms 2 hydrogen atoms.
C. 1 iron atom ,1 sulphur atom, 4 oxygen atoms.
D. 1potassium atom, 1 chlorine atom 3 oxygen atoms

Explanation

To write the formulae of compounds based on the given information and to name the molecules, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Elements and Their Counts**:
- For each compound, identify the elements involved and how many atoms of each element are present.

2. **Write the Chemical Formula**:
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