Hope this helps! If you dont understand balancing equations in general, say so in the comments, I’m happy to help
In order to solve the total pressure that is exerted by the gases, we need to use the Dalton's Law of Partial pressures. These are the calculations that you need to find out the total amount of pressure exerted to the gases:
3.00atm (N2) + 1.80atm (O2) + 0.29atm (Ar) + 0.18atm (He) + 0.10atm (H),
add up all of that, and the answer would turn out to be: 5.37atm.
Molecule is a chemical substance that cannot be broken down into another chemical substance.
Yes, that's correct. It's the tepid latitude.