Answer: The correct option is, 30 protons
Explanation:
Element = Zinc
Atomic number = 30
Atomic mass number = 65
Recall that the atomic number equals the number of electrons and protons.
Atomic number = Number of electrons = Number of protons = 30
Number of neutrons = Atomic mass - Number of protons = 65 - 30 = 35
Therefore, an uncharged zinc atom has 30 protons.
O2 and O3 represent different forms of Oxygen; therefore, they exhibit (4) distinct chemical and physical properties..
Answer:
[Cl⁻] = 0.016M
Explanation:
To begin, we analyze the reaction:
Pb(NO₃)₂ (aq) + MgCl₂ (aq) → PbCl₂ (s) ↓ + Mg(NO₃)₂(aq)
This indicates a solubility equilibrium, resulting in the formation of lead(II) chloride precipitate. The salt can dissociate as follows:
PbCl₂(s) ⇄ Pb²⁺ (aq) + 2Cl⁻ (aq) Kps
Initial x
React s
Eq x - s s 2s
Given that this is an equilibrium scenario, the Kps serves as the constant (Solubility product):
Kps = s. (2s)²
Kps = 4s³ = 1.7ₓ10⁻⁵
4s³ = 1.7ₓ10⁻⁵
s = ∛(1.7ₓ10⁻⁵. 1/4)
s = 0.016 M