There are many sources of air pollution in the united states and around the world. some are natural sources, and other come from human activities. which of these examples is a natural source of air pollution? a.) car exhaust fumes b.) methane gas from cow manure c.) dust from fertilizers used on crops d.) smoke from the burning of fossil fuels

All forces cause motion? true or false

Upon decomposition, one sample of magnesium fluoride produced 1.65 kg of magnesium and 2.56 kg of fluorine. a second sample produced 1.32 kg of magnesium. part a how much fluorine (in grams) did the second sample produce?

The diagrams to the right show the distribution and arrangement of gas particles in two different containers. according to kinetic-molecular theory, which of the following statements is true? check all that apply. if the temperatures of both containers are equal, container a has greater pressure than container b. if the volume of container a decreased, its pressure would decrease. if the pressure in both containers is equal, container a has a lower temperature than container b.