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1. Explain how to use Lewis electron-dot symbols to depict main-group atoms and ions.
2. How to explain the electronic structure of ions using electron configurations and Lewis electron-dot symbols.
3. Which of these is not planar and explain?
a) NI3 b) XeF4 c) BF3 d) SO3 e) CF2=CF2
the perimeter area and volume of a tetrahedron the solid whose faces are 4 equilateral triangles are respectively p 6a
a battery has a volume of 1.78l and contains 3.28x10^3 grams of sulfuric acid, what is the density of sulfuric acid in g/ml?
What is the simplest formula for Chalcocite if a sample of this ore contains 8.274 g copper and 2.088 g sulfur?
A 20.0mL sample of 0.20 M sodium acetate is titrated with 0.11 M HCL(aq). Explain what is the pH after the addition of 50.0mL HCL(aq). (Kb of CH3CO2- = 5.6 ´10-10)
based on the law of multiple proportions how many grams of hydrogen would you expect 2.49 of nitrogen to combine with
An open vessel containing (a) water, (b) benzene, (c) mercury stands in a laboratory measuring 6.0 m x 5.3 m x 3.2 m at 25 deg celsius. What mass of each substance will be found in the air if there is no ventilation
the average concentration of sulfate ion in seawater is 2710 mg of sulfate ion per kg of seawater. what is the molarity
We have learned that valence bond theory helps us to predict s and p bonding in molecules. All of the following statements about molecular bonding are true, but which statement best summarizes the most basic premise for bonding in a molecule?
Consider the TCA reaction that is catalyzed by alpha-ketoglutarate dehydrogenase. Which of the following accurately describes this process? Mark all that apply
Formic acid, HF or has a Ka value equal to about 1.8*10~-4. A student is inquired to prepare a buffer having a pH of 3.4 from a solution of formic acid as well as a solution of sodium formate having the same molarity. Explain how many milliliters ..
50ml HCl reacted with 50ml NaOH and the change in temperature was 6.7oC. Will the temperature change increase or decrease if 25ml 1M HCl reacts with 75ml 1M NaOH?
what is the molar concentration of a solution prepared by dissolving 0.100 moles of potassium nitrate in enough water
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