Question

Calculate the mass in grams of iodine (I2) that will react completely with 27.1 g of aluminum (Al) to form aluminum iodide (AlI3).

Answer 1

1. Well, first you gotta balance your equation :2Al + 3I2 ----> 2AlI3
2. Then find the number of moles of Al reacting
3. The equation/ formula is: No of moles = mass / Molar mass
4. So know plug in the info from your question to the equation/formula 20.4 / 26.98 =0.756 moles
5. This is the balanced equation 2Al + 3I2 ----> 2AlI3
6. According to your balanced equation find the ratios, which is: 2 : 3 : 2
7. Therefore, 2(0.756) of Al reacts with 3(0.756) moles of Iodine according to the equation.
Moles of Iodine = 3 X 0.756 = 2.268moles
8. Now using the formula: Mass of Iodine = moles X molar mass
9. Plug in the info to the formula 2.268 X 126.9= ANSWER
hope this helped :P

Answer 2

Good job @superhelp101 !

Answer 3

Awh, thank you :')

Answer 4

:)