What is the molarity of the chlorine ion in a 5.0M sample of aluminum chloride

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

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13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.