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Rewrite the atomic cores placing an electron pair between each flourine and sulfur core
Write the Lewis structure of SF2 in the box,distributing the remaining valence electrons so that all three atoms are in accordance with the octet rule
a) Sea water contains roughly 28.0 g of NaCl per liter. (NaCl molar mass = 58.44 gmol-1).
i. Calculate the number of moles of NaCl in a liter of sea water.
ii. Calculate the molarity of NaCl in sea water.
iii. Calculate the mass by volume percent (W/V) of NaCl in sea water.
b) 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.
volume of the solution is 214 ml. Find the concentration of the solution in units of
molality.
solution? Assume that the solution has a density of 1.01 g/mL.
Which of the following molecules will not have a dipole moment?
Lewis structure for ionic compound potassium chloride
` Antacid is a substance used to neutralize stomach acidity and relieve heartburn, indigestion, or stomach upset. Magnesium hydroxide (Mg(OH)2), one of the active ingredients in commercial antacids, reacts with stomach acid (HCl) to produce magnesium chloride (MgCl2) and water. The equation is as follows:
Mg(OH)2 + 2HCl MgCl2 + 2H2O
Assume that a person takes 0.100 g antacid. How many mol of MgCl2 will be produced from the ingested antacid, assuming all of the antacid undergoes the reaction?
The number of valence electrons in t he carbon atom is
