If you start with 50 grams of Hydrogen, and 300 grams of Oxygen, how many grams of water will be produced from each (you need to do the stoichiometry twice- once for Hydrogen, and again for Oxygen)

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other

What do you need with it’s not a question your just stating what it says