HELP ME PLEASE ASAP A. Use Hess's law and the following equations to calculate ΔH for the reaction SO2(g) + NO2(g) SO3(g) + NO(g). (Show your work.) (8 points)

i. SO3(g) SO2(g) + O2(g)

ΔH = –98.4 kJ/mol

ii. 1/2 N2(g) + 1/2 O2(g) NO(g)

ΔH = 90.3 kJ/mol

iii. NO2(g) 1/2 N2(g) + O2(g)

ΔH = –33.1 kJ/mol

B. If a radar speed gun operates at a frequency of 3 × 1010 Hz (30 GHz), what wavelength of electromagnetic radiation does it use? What kind of electromagnetic wave does the radar gun use?

THANK YOU

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.