A gas was held at a constant temperature in a closed system. The initial pressure of the gas was 1.70 atm, while its initial volume was 3.70 L. The final volume of the gas was 2.50 L. What was the final pressure of the gas to the nearest hundredth of an atmosphere?

Gas is a type of carbon, i think lol

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

18