A toy balloon containing 425 mL of He escapes from a little boy watching a parade. The temperature at street level is 32°C and the pressure is 745 mmHg. When the balloon stops rising, its volume has become 895 mL
and the atmospheric pressure has decreased to 300. mmHg. What is the temperature, in °C, at this altitude?
Round your answer to 2 significant figures.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the temperature of the gas, in k, not celsius.