How many grams are present in 238 moles of arsenic (As)? (Atomic mass of As = 74.92 g/mol)

• A. 14,000 g
• B. 12,500 g
• C. 17,822 g
• D. 17,825 g

Answer: (C)

Verified step by step guidance

1. Identify the given information: the number of moles of arsenic (As) is 238 moles, and the atomic mass of arsenic is 74.92 g/mol.
2. Recall the formula to convert moles to grams: \(\\text{mass (g)} = \\text{moles} \\times \\text{molar mass (g/mol)}\).
3. Substitute the given values into the formula: \(\\text{mass} = 238 \\times 74.92\) g.
4. Perform the multiplication to find the mass in grams (do not round prematurely to maintain accuracy).
5. Compare your calculated mass with the provided answer choices to select the closest correct value.