How many moles are present in 2.3 grams of phosphorus (P)? (Atomic mass of P = 30.97 g/mol)

• A. 0.48 mol
• B. 0.15 mol
• C. 13.4 mol
• D. 0.074 mol

Answer: (D)

Verified step by step guidance

1. Identify the given information: mass of phosphorus (P) is 2.3 grams, and the atomic mass of phosphorus is 30.97 g/mol.
2. Recall the formula to calculate moles from mass: \(\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}\).
3. Substitute the given values into the formula: \(\text{moles} = \frac{2.3}{30.97}\).
4. Perform the division to find the number of moles of phosphorus present.
5. Compare your calculated value with the provided options to confirm the correct answer.