Atomic mass of Potassium = Mass of 1 atom of Potassium = 39.1 amu Then Mass of 6.02 x 1023 atoms of potassium = 39.1 x 6.02 x 1023 amu = We already know that 1 mole = 6.02 x 1023 atoms Also Number of mole = mass in grams/ atomic mass Then Mass in gram = Number of mole x atomic mass = (39.1 x 6.02 x 1023)/(6.02 x 1023) = 39.1 g The correct option among all the options that are given in the question is the third option or option "B".
The steel rods will enable the concrete to form without any bumps and it will add shape to the cement and strength, so no odd massive lumps are formed.
