Which of the following is a characteristic property of ionic compounds? A. They have low melting points. B. They form hard, brittle crystals. C. They do not form crystals. D. They have low boiling points.

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

When a septic tank backs up a goes in to clean it out