In my opinion, the correct answer among the choices above is option B. AN atom having four electrons in its valence shell is capable of single, double, or triple covalent bonds. This is because 4 electrons of the atom can be shared with other atoms.
Answer:
Ka = 6.15x10⁻⁷
Explanation:
Ka is defined as dissociation constant in the equilibrium of a weak acid with water. The general reaction is:
HA(aq) + H₂O(l) ⇆ H₃O⁺(aq) + A⁻(aq)
And Ka is defined as the ratio between molar concentrations in equilibrium of products over reactants as follows:
Ka = [H₃O⁺] [A⁻] / [HA]
<em>You don't take water in the equilibrium beacuse is a pure liquid</em>
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Replacing with the concentrations of the problem:
Ka = [H₃O⁺] [A⁻] / [HA]
Ka = [4.00x10⁻⁴] [4.00x10⁻⁴] / [0.260]
<h3>Ka = 6.15x10⁻⁷</h3>
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Answer:
_2Mg + _O2 --≥2MgO this is balanced
Answer:
Molality is the measurement of how much concentration is present in a solution by dividing the moles of solute by the kilograms of the solution that the solute was dissolved in.
Explanation: