The circulatory system transports oxygen and nutrients to cells of the body. What does it remove from the body?

A.

oxygen

B.

carbon dioxide and other wastes

C.

blood

D.

capillaries

What is one factor that contributes to seasons occurring in Pennsylvania? A. The revolution of the moon around Earth B. The tilt of Earth on its axis C. The rising and falling of ocean tides D. The distance of Earth from the sun

Just as earth moves around the sun, the moon revoles around the earth. About how many earth days does it take for the moon to travel around the earth?

A weak acid, HA, has a pKapKa of 4.3574.357. If a solution of this acid has a pH of 4.0054.005, what percentage of the acid is not ionized? Assume all H+H + in the solution came from the ionization of HA.

Which of the gases behave the least ideal? Kr2, CO2, H2, CCl4, N2. All ages same temp and pressure

Which of the following for an object should be known to calculate its density

A representative particle of carbon dioxide is

What is the electron dot structure for Silicon

Most ionic substances are soluble in water because water molecules are?

Explain the difference between a solar and a lunar eclipse.

If you have 200 grams of SO4, how many molecules of SO4 will you have?