question_answer

  Fill in the missing data in the following table.

Species/Property			Na atom
Number of moles	2	-	-	0.5
Mass	36 g	-	115 g	-

Answer:

     For , Given, number of moles = 2 and mass = 6 g  Number of particles = Number of mole x 6.022 x 1023 = 2 x 6.022 x 1023 = 1.2044 x 1024 For , Given, number of particles  Number of moles or mol Mass of  Moles x Molar mass                  = 0.5 x 44 = 22g                  ( Molar mass of ) For Na atom. Given, mass = 115 g Number or moles    Number of particles =5 x 6.022 x 1023 = 3.01 1x1024           For Given, number of moles =0.5  Number of particles = 0.5 x 6.022 x1023 =3.01 1x1023      Mass = Number of moles x Molar mass = 0.5 x 95 = 47.5 g                 (Molar mass of  = 24 + 2 x 35.5 =24 +71=95 g ) Thus, the completed table is as

Species/Property			Na atom
Number of moles	2	0.5	5.0	0.5
Number of particles
Mass	36 g	22 g	115 g	47.5 g