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What is important to study for nios grade 12 chemistry? i have only one month left.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons