Which is an example of a physical change
* metal rusting
*silver tarnishing
* water boiling
* paper burning

Calculate the work done by an external agent during an isothermal compression of 1.00 mol of oxygen from a volume of 22.4 l at 10∘c and 1.0 atm pressure to 16.8l

Can anybody me with this? ? (picture included.)

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)