I believe it is a Covalent Bond because 1st off, Calcium sulfide is made up of 2 elements, Calcium (Na) and Sulfer (S). Both elements want to obtain 8 electrons to become balanced (An octet) so therefore, these electrons are shared between these 2 elements.
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:
Electricity is made at a generating station by huge generators. The current is sent through transformers to increase the voltage to push the power long distances. The electrical charge goes through high-voltage transmission lines that stretch across the country.
Answer: I do think that neighborhoods are an ecosystem
Explanation: a ecosystem contains living and non-living things, some examples are the people,plants,and pets are living organisms and the houses and the street lamps are non living. Therefore making a neighborhood a ecosystem