In the urea molecule, (NH2)2CO, both nitrogen atoms are bonded to the carbon atom. Each nitrogen atom has a lone pair. The molecular geometry is

Balance this equation co2(g) + h2o (g) show that the balanced equation obeys the law if conversation of mass

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

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!