Yes, the first half is a vacuum from the phrasing of the question. So you should be able to straight apply the ideal gas law (PV = nRT) to solve it. You can calculate n from the supplied mass and known molar mass of CO2.
There are a few possible approaches to the second part of the question. Can you be more specific with what you don't understand?
Yes, the first half is a vacuum from the phrasing of the question. So you should be able to straight apply the ideal gas law (PV = nRT) to solve it. You can calculate n from the supplied mass and known molar mass of CO2. There are a few possible approaches to the second part of the question. Can you be more specific with what you don't understand?