Air can best be described as a mixture of what 3 things

The diagram below shows the movement of Earth plates. Which of these features is most likely formed as a result of the movement of Earth plates shown in the diagram? Select one: a. a fault b. a ridge c. a trench

Describe two tests that you can run to determine if something is a substance or a mixture.

Which of the following is not true as we move down a group of s and p-block elements in the periodic table

The volume and amount of gas are constant in a tire. The initial pressure and temperature are 0.8 atm and 296 K. At what temperature (in K) will the gas in the tire have a pressure of 2.2 atm?

The chemical reaction that occurs in a gas grill is the combustion of propane, C3H8. Write a balanced equation for this reaction. (Include states of matter.)

A typical hydrogen peroxide solution from a drug store is labeled as 3.0% hydrogen peroxide. what is the other 97% of this solution?

The pressure of an enclosed gas depends on

What is one way to speed up a chemical reaction without otherwise affecting the reaction? a. add a catalyst b. decrease surface area c. change the products d. change the reactants

Why is halleys comet part of our solar system?

Fluorine-18, which has a half-life of 110 min, is used in PET scans. a. If 100. mg of fluorine-18 is shipped at 8:00 a. m., how many milligrams of the radioisotope are still active after 110 min? b. If 100. mg of fluorine-18 is shipped at 8:00 a. m.