How can i calculate the mass percent of carbon, nitrogen and oxygen in acetamide, c2h5no?

Ab c or d ? i’m not sure what the answer is

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.

The sum of the oxidation numbers in a neutral compound is always