Just took the test and it was 32grams. On my test it was Block B: 32 Grams
Explanation:
4 x 6.02 x 10²³ = 2.41 x 10²⁴
First, convert 2.0 mL of AlCl3 to grams using the density, which is 2.48g/mL. So 2.48g/mL * 2.0 mL = 4.96g. Then find the molar mass of aluminum chloride and divide 4.96 by this number, which is 133.34g. 4.96g*(1mol/133.34g) = .0372 mols AlCl3. Check for significant digits though.
Since a burning fire, a racing car, and boiling water all demonstrate kinetic energy, the correct answer is a chemical bond, which exhibits potential chemical energy.
Hope this helps.