Question

calculate the number of mole in :- a) 3.011×10^21 co2 molecule ; b) 12.011×10^22 c-atom .​

Answer 1

Answer:

a) number of moles = given number of atoms / avagadro n

= 3.011*10^21/6.022*10^23

= 0.5* 10^-2

b) similarly it is equal to 1.99*10^-1

Answer 2

Answer:

Ans: same to same of b) solutions

ans:b)Molar mass for O atoms = 16.00 g/mol

Molar mass for O2 molecules =

2 x (molar mass of O atoms) = 2 x (16.00 g/mol) = 32.00 g/mol

Molar mass for CO2 molecules =

1 x (molar mass of C atoms) = 1 x (12.01 g/mol) = 12.01 g/mol

+ 2 x (molar mass of O atoms) = 2 x (16.00 g/mol) = 32.00 g/mol

44.01 g/mol