The rate law, rate constant, and reactant concentrations for the reaction of nitrogen dioxide with oxygen are given. What is the rate of the reaction under these conditions? R = k[NO]2[O2], k = 7,000 M-2 • s-1

[NO] = 0.040 M, [O2] = 0.060 M

A. R = 7,000 M-2 • s-1

B. R = 16.8 s-1

C. R = 0.672 M • s-1

D. R = 0.040 M2 • s-1

In order to calculate the amount of heat transferred you must know the __ and specific heat of the material, as well as the change in temperature. a. volume b. density c. mass d. enthalpy

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.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.