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what is the mass percent chlorine in NaCl?
Assume the atom Oxygen(O) can form both cationic(O+) and anionic(O-) species. Place the following species in order of increasing first ionization energy, starting with the lowest.
O+, O, O-
Lowest first Intermediate Highest first
ionization energy < ionization energy < ionization energy
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Consider a Fluorine atom (F) and a Fluorine anion (F-). Which of these two species would you expect to have a larger radius? Explain your answer.
Explain why the first ionization energy of Aluminum (Al) is less than that of Magnesium
(Mg)
Carbon tetrachloride is an organic compound with the chemical formula CCl4. It is a
colorless liquid with a “sweet” smell.
i. Using the ground state electron configuration and excited state electron
configuration explain the hybridization of the central Carbon (C) atom.
ii. Identify the orbitals that overlap to form the C-Cl bond. Draw a diagram to show
the orbital overlap.
iii. What is the bond angle of CCl4?
5.601g of barium salt was heated oxygen gas was only evolved and resudue was found to be barium chloride weighing 3.834g whats is the formula for the original salt and its name
To identify the cations and anions present in an unknown solution, the following tests were carried out.
I. A flame test on the solid substance produces a brick red colour.
II. Nitric acid was added to a solution of the substance followed by a few drops of barium nitrate solution. A white precipitate was formed.
i. What is the cation present in the substance?
ii. What is the anion present in the substance?
iii. Give the formula of the substance present.
c) A technician had two bottles containing solid salts. One bottle contained Potassium
Chloride (KCl) and the other contained Sodium Chloride (NaCl). Unfortunately, the labels
had fallen off from the bottles. Explain how, the technician could find out which bottle
contains KCl and which bottle contains NaCl.
if 45.90 mol of glucose is present in the oxidation, how many moles of CO2 are produced?
- During the winter, air temperature in the northern parts of the planet can remain below zero degrees celsius for months, howerver , the fish and other animal living in the lakes survive.
