Multiple choice chem question. its a timed quiz plz help!! (also its not 950 that was my first attempt)

10mmHg

Explanation:

simply subtract each gas' amount from 760, thus getting 10 mmHg left of methane.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

it is stable as it is in group 0 which have full outer shells of electrons