The number placed in front of a compound to balance a chemical reaction is called?

What is the independent variable in this investigation? mass volume sample number substance density

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn