Which is an example of physical contamination? a) broken glass b) lead c) toxins d) bacteria

Which step in naming unsaturated hydrocarbons is used for alkenes but not alkynes

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Label a-f based on the table using c for concentrated and d for dilute