Question

Please tell according to class9​

Answer 1

Answer:

Calculate the mass in each case,

(i) 0.1g atom silver = 0.1 gram

(ii) 0.1 mole of H2SO4

Number of moles = Given mass /molecular mass

0.1 = given mass/98

mass of H2SO4 = 0.1 X 98 = 9.8 gram

(iii) 10^23 molecules of CO2 gas

1 mole of gas = 6.023 x 10^23 molecule

Mass of 6.023 x 10^23 molecule CO2 gas = 12 +16 +16 = 44 gram

Mass of 10^23 molecule of gas = 44/6.023 x 10^23 X10^23 = 7.3 g

(iv) 1 gram of carbon = 1 gram

(v) 10^23 atom of calcium

1 mole of atom = 6.023 x 10^23 atoms

Mass of 6.023 x 10^23 atom of Ca = 40 gram

Mass of 10^23 atom of Ca = 40/6.023 x 10^23 X10^23 gram = 6.64 g 

Increasing order according to mass:

0.1g atom silver << 1 gram of carbon << 10^23 atom of calcium << 10^23 molecules of CO2 << 0.1 mole of H2SO4 

Hope it helped you...

Thank you !!