Question

Al2(CrO4)3 percentage of Al

Answer 1

Answer:31.76%

Step-by-step explanation:

You find the total molar mass of the whole empirical formula and put the fraction 2 x Al over 170.00 which is the molar mass and you’ll get 31.76%

Answer 2

13.4%

Step-by-step explanation:

Take the molar mass (26.98) of Al x 2 because there are 2 moles in the given compound. Divide this number by the total molar mass of the compound (401.9) this gives you .134. To get a percentage mulitply by 100 for 13.4%.

[(26.98 x 2)/401.9] x 100 =13.4