Which of the following are examples of chemical energy being released or stored? I. A car battery reacting and releasing energy
II. A girl eating a sandwich which helps her move
III. Propane burning on a barbecue

Needthe meter is the standard unit for: 1) height 2) length 3) weight 4) mass

Identify and describe the three ways that mutations affect organisms.

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