A gas mixture being used to simulate the at- mosphere of another planet consists of 311 mg of methane, 216 mg of argon, and 212 mg of nitrogen. The partial pressure of nitrogen at 293 K is 16 kPa. Calculate the total pressure of the mixture.

i believe it is 40–40–20%

explanation:

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.