‏type of advance medical directive does the AMA recommend? Living will or Durable power of attorney ‏I need a definitive answer to this question, please

How many moles of al3+ ions are in 1.25 moles of al2o3

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out