Choose the statement that is a misconception about a system in chemical equilibrium.

Select one:
a. The rate of the forward reaction is equal to the rate of the backward reaction.
b. The concentrations of the products and reactants don't change.
c. The values of the products and reactants do not have to match each other.
d. The reactions stop once equilibrium is reached.

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.