propanol has a normal boiling point of 97.8°c. at 400 torr, it has a boiling point of 82.0°c. what is the heat of vaporization?

Which statements are true for invasive species? 1. they always stabilize an ecosystem. 2. they’re always successful in adjusting to a new habitat. 3. they often compete with the native species for resources. 4. they have the ability to displace the native species. 5. they’re always pests.