A beaker contains 38.9 mL of pentane ( C5H12 , density is 0.626 g/mL). Determine how many C atoms this liquid contains.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

Which of the following are acids or bases? 1. sodium hydrogen 2. barium hydroxide solution 3. carbonate solution