Which has the greater density?

air at sea level

air at 20 km altitude

A mixture of uneven distribution and easy separation is: - heterogeneous - a solution - homogeneous - a standard

why does the level of carbon dioxide affect the global temperature?

Predict what would be observed and why from an aqueous mixture of zinc chloride and silver nitrate

Deep Space 2 was a spacecraft powered by an engine that gave off xenon partides to change velocity. It had a mass of 500 kg. Which expression can be used to find the spacecraft's acceleration if its engine created a net force of 0.10 N? 0.

A gas barbecue burns propane gas to generate heat. Propane gas becomes carbon dioxide gas and water vapor as it burns. Oxygen from the air is a reactant in this process. This is an example of a chemical reaction.

How does a change in temperature affect the kinetic energy of the particles in a reaction?

Which characteristic best identifies an Arrhenius base

Which statement correctly describes why a compound is a pure substance? O A compound is not a pure substance because each of its molecules is m elements A compound is a pure substance because its molecule cannot be broken O A compound is not a pure

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons?

A food web shows the easiest way to get the most energy out of a producer the path a producer has to take to reach the top of the web how all organisms are connected through energy all of the possible energy pathways through an ecosystem