What should I do to order to get the answer?

What reaction is taking place? 02 + c3h8 = h20 + co2

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

What is the importance of interlocking the fingers and rubbing while washing hands? the palms are the dirtiest parts of the hands. the spaces between the fingers get washed. the backs of the hands get washed. the fingernails are the dirtiest parts of the hands