What force is responsible for earth orbiting the sun

gravitational force
magnetic force
nucular force
electrostatic force

List four observations that indicate that a chemical reaction may be taking place

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Tell me the iupac names of the following alcohols: