A first order reaction has 1/16 of the original amount left after 500 seconds. What is the half-life of the reactant in this reaction

Describe the interaction that occurs between two objects with the same electrical charge.

What are the 4 phases of matter in order of increasing engery content?

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