Which of the following statements is true? A. A producer usually obtains food by hunting other organisms. B. Humans that prepare their own meals are producers. C. A producer must be a plant. D. Consumers depend upon producers for food.

14. A 35.0 mL sample of argon gas has a pressure of 1.0 atm and a temperature of 150 C. What is the final volume if the pressure goes to 2.0 atm and the temperature to 450 C?

1.50 mol ne, 2.65 mol ar, and 1.75 mol xe. what is the partial pressure of xe?

What is the difference between foliated and non-foliated metamorphic rocks

Explain what environmental bias means. What are the categories that make up environmental bias? How does environmental bias relate to chemistry?

What mass of sodium carbonate would be required to remove essentially all of the calcium ion from 750 l of solution containing 43 mg ca2 + per liter?

Which technology is most efficient in mapping large areas of the ocean floor?

Which part of the crust is the thickest

For a given chemical reaction, the addition of a catalyst provides a different pathway that (1) decreases the reaction rate and has a higher activation energy (2) decreases the reaction rate and has a lower activation energy (3) increases the

Many solutes that must move into and out of cells exist in either a protonated or ionized form, or they have functional groups that can be either protonated or ionized.

Calcium carbide can be made by heating calcium oxide with carbon. How many kj of heat are absorbed in the reaction?