Which best describes a compound?

O A elements that are chemically combined

B

elements that are physically combined

c. elements that can be broken down into atoms

D. elements that cannot be broken down into atoms

Based on the diagram, which list places the fossils in order from youngest to oldest? o o O o ammonite, fern, trilobite, gastropod gastropod, ammonite, fern, trilobite trilobite, gastropod, ammonite, fern fern, ammonite, gastropod, trilobite

What is the gram molecular mass of a compound if 5 moles of the compound has a mass of 100 grams?

You have 100.0 mL of a solution of hydrochloric acid that has a pH of 3.00. You add 100.0 mL of water to this solution. What is the resulting pH of the solution?

Convert 2.5 lbs to g

If you ix 20.0 ml of a 3.00m sugar solution with 30.0 ml of a 5.69 m sugar solution, you will end up with a sugar solution of?

Based on reactivity, which of the following elements can replace aluminum (Al) in a compound during a single replacement reaction?

How do you tell if a reaction is endothermic or exothermic using only the written formula

Convert 1000. Minutes to days

If energy cannot be created, where did the types of energy you observed when the tortilla chip burned come from?

If I have an unknown quantity of gas at a pressure of 750 torr, a volume of 25 liters, and a temperature of 300 K, how many moles of gas do I have?