How many moles of Al are necessary to form 28.2 g of AlBr₃ from this reaction: 2 Al(s) + 3 Br₂(l) → 2 AlBr₃(s) ?

Which of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?

How much would the freezing point of water decrease if 4 mol of nacl were added to 1 kg of water (kf=1.86 degrees c/(mol/kg) for water and i=2 for nacl a- 7.44 degrees c b- 14.88 c 3.72 d 1.86

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?