A phenomenon is something that sparks your curiosity and can be seen in nature. Describe a phenomenon that you have witnessed.

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

What must be in balance for temperatures to remain constant?

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon