Chemistry, asked by RajputAdarshsingh, 10 months ago

solve all questions of 7. and 8. for 50 points with explanation​

Attachments:

Answers

Answered by nikhil9948
1

Answer:

7. a) This Atomic weight is the weight of 1 mole of atoms of that kind. For instance look at N (Nitrogen), you will see the atomic mass is 14.00674 grams. So that means if you had 1 mole of nitrogen atoms, it would weight, 14.00674 grams.

b) Mass of 1 mole of aluminium atoms = 27 g. Mass of 4 moles of aluminium atoms = (27 x 4) = 108 g.

c) Mass of 10 moles of sodium sulphite is 1260 grams. So, the mass of 10 moles of sodium sulphite is 1260 grams.

8. a) Molar mass of O2 = 2 x 16 = 32 g

Number of moles in 12g O2 = Given mass/ Molar mass = 12/32 = 0.375 mole

(b) Molar mass of H2O = 2 x 1 + 16 = 18g

Number of moles in 20 g H2O = 20/18 = 1.11mole

(c) Molar mass of CO2 = 12 + 16 x 2 = 12 + 32 = 44g

Number of moles in 22g CO2 = 22/44 = 0.5mole

Answered by anandkumar4549
1

Answer:

7. a) This Atomic weight is the weight of 1 mole of atoms of that kind. For instance look at N (Nitrogen), you will see the atomic mass is 14.00674 grams. So that means if you had 1 mole of nitrogen atoms, it would weight, 14.00674 grams.

b) Mass of 1 mole of aluminium atoms = 27 g. Mass of 4 moles of aluminium atoms = (27 x 4) = 108 g.

c) Mass of 10 moles of sodium sulphite is 1260 grams. So, the mass of 10 moles of sodium sulphite is 1260 grams.

8. a) Molar mass of O2 = 2 x 16 = 32 g

Number of moles in 12g O2 = Given mass/ Molar mass = 12/32 = 0.375 mole

(b) Molar mass of H2O = 2 x 1 + 16 = 18g

Number of moles in 20 g H2O = 20/18 = 1.11mole

(c) Molar mass of CO2 = 12 + 16 x 2 = 12 + 32 = 44g

Number of moles in 22g CO2 = 22/44 = 0.5mole

Similar questions