As you travel from a solid to a gas, energy is being absorbed or given off?

0.09 moles of sodium sulfate in 12 ml of solution

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 causes most sediment to wash or fall into a river