What is/are the product(s) of the reaction, when an amphoteric oxide reacts with acid or base?

When the volume and number of particles of a gas are constant which of the following is also constant

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6