When you balance a redox equation using the half-reaction method, what do you do after you balance the atoms and charges? O A. Determine the oxidation numbers for the elements.
OB. Write the oxidation numbers for the elements.
OC. Add back in any spectator ions.
OD. Add the two half-reactions to show the overall redox equation.
O E. Use a coefficient to make the number of electrons lost equal the number of electrons gained.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.