Answer:A. Dilute copper and ascorbic acid solutions should be disposed of in the waste container in the hood.
C. Metal and graphite electrodes should be rinsed with water, dried, and returned to their positions on the lab bench.
D. The contents of the half-cell module should be disposed of in the waste container in the hood.
Explanation: An electrochemical cell is a cell that has the capability of producing Electric energy from chemical reaction (voltaic cells) or using Electric energy to make chemical reactions to take place(electrolytic cell). For a proper or effective waste disposal in an electrochemical cell the following options are correct.
Dilute copper and ascorbic acid solutions should be disposed of in the waste container in the hood.
Metal and graphite electrodes should be rinsed with water, dried, and returned to their positions on the lab bench.
The contents of the half-cell module should be disposed of in the waste container in the hood.
Answer: <em>True</em>
Explanation:
<em>Venus is the hottest planet in the solar system. Mercury is still hot but half of it is also cold due to the sun not directly pointing at it.</em>
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Answer:
A simple solution is prepared by dissolving a solute species of known mass into a liquid solvent of known volume. In the prepared solution there is a certain total number of solute moles dissolved in a certain total solution volume in liters. known as Molarity.
This is an aqueous solution where ammonium sulfate is the solute. It is a salt compound that fully dissociates to provide twice the ammonium cation molarity:
(NH₄)₂SO4(s) → 2NH₄⁺ (aq) + SO2₄⁻(aq)
From the required ammonium cation molarity, the required compound molarity will be:
[NH₄⁺]=0.150M
[(NH₄)₂SO₄]= 0.150 M÷2=0.0750M
We multiply this molarity by the given solution volume to get the ammonium sulfate moles required:
N compound = 0.25000L×0.0750 M
=0.0188 mol
We multiply these moles by the known ammonium sulfate molar mass to get the mass in grams:
M compound= 0.0188 mol×132.14gmol
=2.48g
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When chemical bonds are broken from the environment in which they were made