Which is an example of an element?

a. salt (nacl)

b. water (h20)

c. silver (ag)

d. electron (e-) hint?

Which factor drives surface ocean currents? wind energy solar energy pull of the moon movement of turbines

for a reversible chemical process to reach equilibrium, A - the rate of the forward reaction must be equal to the rate of the reverse reaction, B - the mass of the reactants music be equal to the mass of the products, C - the activation energy of

A 10 gram sample of material, a, was placed in water. four grams of it, b, did not dissolve, even after being separated and placed in a second volume of water. bcould not be decomposed into any simpler substances.

Enthalpy is the heat content of a system at constant pressure. a. True b. False

Which statement best explains why the overall charge on an atom is zero? a. The positive charge of the neutrons in the nucleus equals the negative charge in the electron cloud. b.

Which of the following is a mixture? alcohol water mercury ink

A gas occupies 3.5 L at standard pressure. Find the volume of the gas when the pressure is 1.5 atm.

What is the temperature (in K) of 16.45 moles of methane gas in a 4.95 L container at 4.68 atm?

What do we call the process by which cells obtain the energy that they need?

Which of the following statements describes how the periodic table is organized? 1. The elements are organized alphabetically. 2. The elements are organized by their size. 3. The elements are organized by the date they were discovered. 4.