Correct. Its called noble gas configuration.
Answer:
The overall change in the oxidation number of sulfur is 8.
Explanation:
Oxidation number is defined number assigned to an element in reaction which represent the loss or gain of electrons by an atom of an element in a compound.
In
let the oxidation number of S in hydrogen sulfide be x.
x = -2
In
let the oxidation number of S in sulfate ion be x.
x = -2 + 8 = +6
The overall change in the oxidation number of sulfur :
= [+6] - [-2] = 8
Answer:
4C + S8 ------> 4CS2
Coefficients are 4,1,4 respectively
Answer:
5.18.
Explanation:
<em>∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.
</em>
[OH⁻] = 1.5 x 10⁻⁹ M.
∴ [H₃O⁺] = 10⁻¹⁴/[OH⁻] = 10⁻¹⁴/(1.5 x 10⁻⁹ M) = 6.66 × 10⁻⁶ M.
∵ pH = - log[H₃O⁺]
<em>∴ pH = - log(6.66 × 10⁻⁶ M) = 5.176 ≅ 5.18.</em>