What two quantities are conserved in every chemical reaction?

a. moles and mass

c. volume and mass

b. mass and atoms

d. moles and atoms?

Which accurately ranks the waves from lowest energy wave to the highest energy waves?

Which compound is an acid? A. HNO3 B. NH3 C. C2H4 D. KCl

What happens to the energy that is stored in cells? Check all that apply It is released slowly It is released quickly It is released in a single reaction It is released in a series of heactions It is used by cells for repair and growth.

A battery has chemical energy, which can be used to generate thermal and radiant energy in a lightbulb.

Students want to separate and compare the components of black ink and green ink. which technique is the best for the students to use?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.

Name a type of asteroid and give a description.

Chemical equation for: Cuprite, copper (I) oxide Chalcocite, copper (I) sulfide Covellite, copper (II) sulfide

The light incident on a smooth reflecting surface undergoes specular reflection. The angle of reflection is 55°. What can you say about the angle of incidence?