Where is most of the mass in an atom located

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

What is the difference between an igneous, sedimentary and metamorphic rock

Aparent with freckles is crossed with a parent without freckles. the punnett square shows the possible genotypes and phenotypes of the offspring. which statement accurately describes the probability of phenotypes? a.the offspring are more likely to have freckles. b.the offspring are more likely to have no freckles. c.the likelihood of the offspring having freckles and not having freckles is the same. d.the likelihood of the offspring having freckles and not having freckles cannot be determined.