4. Calculate the mass of each element: a) 3.25 mol of He
b) 0.0455 mol of Ni
c) 1.33 mol of K

How much energy moves onto the next level, in an energy pyramid

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?