John dalton believed which of the following about atoms? atoms are real even though they're invisible. all atoms of a single substance are identical. the atom could be divided into smaller parts. atoms of different substances differ by weight.

Substance a is a nonpolar liquid and has only dispersion forces among its constituent particles. substance b is also a nonpolar liquid and has about the same magnitude of dispersion forces among its constituent particles. when substance a and b are combined, they spontaneously mix.