O2 oxygen is diatomicO + O O=O Double Bond

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

Which of the following is a physical property flammability heat of combustion solubility and toxicity