Which of the following is true about petroleum? O It emits harmful radiation.
O It is the most expensive fuel.
O It produces greenhouse gases.
O It provides a clean source of energy.

Harvey mixes two liquids. which observation of the new mixture most likely indicates a precipitate is forming?

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.