Yes... that is correct.
CH4 is methane so the coefficent in front of it would double the number of atoms of each element
Your closes answer would be a.10
What is the percent composition by mass of oxygen in magnesium oxide, MgO?
Answer: 39.7 percent
There are 2 unpaired electrons in sulphur orbital...
Answer: This is an oxidation-reduction (redox) reaction:
3 C-II - 12 e- → 3 CII (oxidation)
4 CrVI + 12 e- → 4 CrIII (reduction)
C2H5OH is a reducing agent, K2Cr2O7 is an oxidizing agent.