please help me on all of these!!

Part A Which of the following represent a buffer system? Match the phrases in the left column to the appropriate blanks in the sentences on the right. Reset Help it contains a weak acid and its salt A system with both H,C,H,O, and NasC Hs01 classified as a buffer system because A system with both HI and LiOH classified as a buffer system because it contains only a neutral salt it is missing the salt of the weak acld it is a salt of a strong acid and a strong base is not A system with only NaNO3 classified as a buffer system because A system with only H, PO classified as a buffer system because Is It is a mixture of a strong acid and a strong bose Part A Which of the following represent a buffer system? Match the phrases in the left column to the appropriate blanks in the sentences on the right. Reset Help it contains a weak acid and its salt A system with both H,C,H,O, and NasC Hs01 classified as a buffer system because A system with both HI and LiOH classified as a buffer system because it contains only a neutral salt it is missing the salt of the weak acld it is a salt of a strong acid and a strong base is not A system with only NaNO3 classified as a buffer system because A system with only H, PO classified as a buffer system because Is It is a mixture of a strong acid and a strong bose Part A s How many moles of O2 are needed to react with 1.55 mol of C2H2? Express your answer to three significant figures and include the appropriate units. HA ? n(O2) = Value Units Submit Request Answer Part B How many moles of CO2 are produced when 3.2 mol of C2H2 react? Express your answer to two significant figures and include the appropriate units. + ? nCO2) = Value Units Submit Request Answer Part C How many moles of C2H2 are required to produce 0.48 mol of H2O? Express your answer to two significant figures and include the appropriate units. JO ? n(C2H2) = Value Units Submit Request Answer Part D How many moles of CO2 are produced when 0.115 mol of O2 reacts ? Express your answer to three significant figures and include the appropriate units. HA ? n(CO2) = Value Units Submit Request