A mixture of 8.1 g CH4 and 8.1 g Kr is placed in a container and the total pressure is found to be 0.38 atm . 1) Find the partial pressure of CH4. 2) What is the oxidation number change for the oxygen atom in the following unbalanced reduction reaction : C8H8(g) + O2 (g) → CO2(g) + H2O(g)

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

What effect might melting sea ice have for people who live in coastal areas?

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon