7. Which of the following does not use echolocation?

a. Dog

b. Bat

c. Dolphin

d. Submarine

What term identifies a type of nuclear reaction

For each pair, which has higher potential energy? (a) The fuel in your car or the gaseous products in its exhaust (b) Wood in a fire or the ashes after the wood burns

What is the pH of a 0.051 M solution of HCl?

What is the next smallest classification group after order

What is the Arrhenius definition of an acid? A substance that increases H3O + concentration when it is dissolved in water. A substance that increases OH - concentration when it is dissolved in water. A compound that donates protons.

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.