The formula is HgS
Hope this helps :D
When base is added in order to increase the pH of a solution, it results in MOH salt <u>precipitating first.</u>
Equation :
MOH (s) ⇄ M⁺ (aq) ₊ OH⁻(aq)
K
= [M⁺] [OH⁻]
K
= 1.39×10⁻¹² and [M⁺] = 0.001M
∴ 1.39×10⁻¹² = (0.001M) [OH⁻]
[OH⁻] = 1.004×10⁻¹⁹M
pOH = -log [OH⁻] = 11.9
pH = 14 - pOH
= 14 - 11.9
<u>pH = 2.1</u>
To learn more about solubility equilibrium ;
https://brainly.in/question/9213521
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Lithium fluoride is the compound name
Answer:
f = 7.5 E14 s-1
Explanation:
energy emitted by photon:
- E = h.c / λ.......(1)
- E = h.f......(2) Planck-Einstein
∴ λ = (400nm)(m/1 E9 nm) = 4.00 E-7 m
∴ h ( Planck's constant) = 6.626070150 E-34 J.s
∴ c (velocity of light) = 3.00 E8 m/s
∴ f (frequency): photon/s
If (1) = (2):
⇒ f = c / λ = E / h
⇒ f = (3.0 E8 m/s) / ( 4.00 E-7 m) = 7.5 E14 s-1