If 178g of H2O is produced by reacting 20g of H with O, how many grams of O were used?

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Ahydrogen atom has 1 electron. how many bonds can hydrogen form? a) 1 b) 2 c) 3 d) 4 e) 5