OLLU
What are the number of atoms in 22.4dm of chlorine gas at S. T.P:
A. 10
B. 20
C 6.02 x 1023
- 1.2 x 1024
3

C. 6 E23 atoms Cl2

Explanation:

S.T.P:

∴ T = 25°C ≅ 298 K

∴ P = 1 atm

ideal gas:

∴ R = 0.082 atm.L/K.mol

∴ V = 22.4 dm³ = 22.4 L

⇒ mol (n) = PV/RT

⇒ n Cl2(g) = ((1 atm)(22.4 L)/(0.082 atm.L/K.mol)(298 K))

⇒ n Cl2(g) = 0.9166 mol

⇒ atoms Cl2(g) = (0.9166 mol)*(6.022 E23 atoms/mol)

⇒ atoms Cl2(g) = 5.52 E23 atoms ≅ 6 E23 atoms

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

catya that's not even a b or c