a helium balloon has a volume of 2.5L at STP. when the pressure stays constant and the temperature decreases to 136.5 K what is the new volume

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude