If you want to make 100 grams of ammonia, how many grams of hydrogen should react

Well, since ammonia has the chemical formula NH3. Therefore the

relative atomic mass is 17 (14 + (1) 3). So 100 divided by 17, times 3

= 17.64705882352941g. I did this in order to figure out firstly,

how much the weight of 1 of the 17 nuclear particles, which make up

ammonia, would have to be present (in grams) for everything to be

in proportion to which would make 100g. Then by timesing it by 3

shows how much the 3 hydrogen atoms contributed in weight towards

the 100 grams. To prove that 17.64 ... is correct you can add

(100 / (17) X (17-3).