What are the similarities and differences of the atomic models of
Democritus, Aristotle, and Dalton?

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

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

Name the element in group 17, period 2. (periodic table)