56 g of nitrogen gas reacts with 6 g of hydrogen gas to produce ammonia.
N2 + H2=NH3

Can someone me with these questions plz.

Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?

What produces wave a)sound b) heats c)transfer of energy d)vibrations