How will positron emission affect the
atomic number and mass number of the atom?

What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 h 8 ) (density = 0.867 g/ml) to a 250 ml volumetric flask, and then filling to the mark with benzene (c 6 h 6 ) (density = 0.876 g/ml)?

Ineed with a, b, c, d, and e on the long answer

How many miles of water are produced if 5.43 mol pbo2 are consumed