Explain the benefits associated with
wearing a mask.

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

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

What is the number of neutrons in an atom with atomic mass of 35