What is an explanation for many hypotheses and observations called?

Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?

Give one example of a pure (exact) number and of an estimated (measured) number.