How many formula units are in 4.8 104 grams of Al ( CrO4 ) 3?

Answer 1

To find the number of formula units in 4.8 × 10^4 grams of Al(CrO₄)₃, we first need to calculate the molar mass of Al(CrO₄)₃. The molar mass is approximately 258.00 g/mol. Next, we can determine the number of moles in 4.8 × 10^4 grams by dividing the mass by the molar mass: ( \frac{4.8 \times 10^4 \text{ g}}{258.00 \text{ g/mol}} \approx 186.8 \text{ moles} ). Finally, we multiply the number of moles by Avogadro's number (6.022 × 10²³) to find the number of formula units: ( 186.8 \text{ moles} \times 6.022 \times 10^{23} \text{ units/mol} \approx 1.12 \times 10^{26} \text{ formula units} ).