To determine how many moles are in 5.3 grams of phosphorus, follow these steps:

Step 1: Write the molar mass of phosphorus

Phosphorus (P) has a molar mass of approximately 30.97 g/mol.

Step 2: Use the formula for moles

The formula to calculate moles is:
$\text{Moles} = \frac{\text{Mass (g)}}{\text{Molar Mass (g/mol)}}$

Step 3: Substitute the values

$\text{Moles} = \frac{5.3 \, \text{g}}{30.97 \, \text{g/mol}}$

Step 4: Perform the calculation

$\text{Moles} \approx 0.171 \, \text{mol}$

Final Answer:

There are approximately 0.171 moles of phosphorus in 5.3 grams.

---

Would you like me to explain any steps in more detail or show unit conversions?

Here are 5 related questions you might find useful:

1. How many grams are in 2.5 moles of phosphorus?
2. What is the molar mass of phosphorus pentoxide (P$_4$O$_10$)?
3. How do you calculate the number of molecules from moles?
4. How many moles are in 10 grams of oxygen gas (O$_2$)?
5. What is the mass of 0.5 moles of sulfur?

Tip: Always ensure units cancel correctly when performing mole-to-mass or mass-to-mole conversions.