Which of the following is not a sign that a chemical change has occurred?

-change in energy

-change in mass

-formation of precipitate

-change in color

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.

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

What is the reaction between an acid and a base