Indicate whether the following represents a Chemical or Physical change: Gasoline burns in air

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

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!

Which statement is true about this reaction? 14n+h–> 150 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.