Actually Welcome to the concept of Atomic Structure.
Since, We all know that, To draw any Electron-Dot Structure, we always have to know the exact Number of valence or free electrons of any atom or molecule, hence
The Correct Answer is :-
D. Number of valence electrons.
It could both the 2nd and the 3rd,
because if you add the exponents (2 + 1 + 6 = 9) you don't get 10.
and also each orbital level can and has to carry 2 electrons, and the 2s only has 1 there.
Answer:
Option A. 3.16 g/L
Explanation:
We'll begin by calculating the molar mass of Cl₂. This can be obtained as follow:
Molar mass of Cl₂ = 2 × 35.45
= 70.9 g/mol
Finally, we shall determine the density of Cl₂. This can be obtained as follow:
Molar mass of of Cl₂ (M) = 70.9 g/mol
Pressure (P) = stp = 1 atm
Temperature (T) = stp = 273 K
Gas constant (R) = 0.0821 atm.L/Kmol
Density (D) =?
D = PM / RT
D = (1 × 70.9) / (0.0821 × 273)
D = 70.9 / 22.4133
D = 3.16 g/L
Thus, the density of the gas is 3.16 g/L.