Question

Calculate the weight if 0.2 moles of sodium carbonate

Answer 1

Answer:   21.2g

Explanation: Molar  Mass of Na= 23

                     Molar Mass of Carbon=12

                     Molar Mass of Oxygen = 16

                    Then, Molar mass of $Na_{2}CO_{3}$ is (23*2+12+16*3)=106

                 Implies that weight of 1 mole of Sodium Carbonate=106

Since,

          Number of moles=Given mass/Molar Mass

Therefore,

         Mass of sodium carbonate = 0.2*106

                                                      =21.2g

Answer 2

Answer:

weight of Na2Co3 if 0.2 moles is 21.2 grams