What is the mass of 4.32 mol of GaI_3?

• A. 650 g
• B. 455 g
• C. 120 g
• D. 300 g

Answer: (B)

Verified step by step guidance

1. Identify the molar mass of GaI_3 by summing the atomic masses of gallium (Ga) and iodine (I). Use the periodic table values: atomic mass of Ga ≈ 69.72 g/mol and atomic mass of I ≈ 126.90 g/mol.
2. Calculate the molar mass of GaI_3 using the formula: \(\text{Molar mass of GaI}_3 = 69.72 + 3 \times 126.90\) g/mol.
3. Use the relationship between moles, molar mass, and mass: \(\text{mass} = \text{moles} \times \text{molar mass}\).
4. Substitute the given number of moles (4.32 mol) and the calculated molar mass into the equation: \(\text{mass} = 4.32 \times \text{molar mass of GaI}_3\).
5. Perform the multiplication to find the mass of 4.32 mol of GaI_3 in grams.