A solution of ammonia NH3(aq) is at equilibrium. How would the equilibrium change if OH were added to the solution?
A. (NH4+) and (OH) would decrease.
O B. (NH4+] would increase and (OH] would decrease.
O C. (NH4+) and (OH) would increase.
D. (NH4+) and (H+] would decrease.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

State one important difference between a physical change and a chemical change?

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.