Gas produced from a reaction is a phase change and not a chemical change.

a. True

b. False

All of the following metals replace hydrogen of an acid except ... A. Sn B. Au C. Zn D. Al

Should disel and gasoline engines complaint with CO2 emissions standards be banned? Can this statement be answered by science?

Isaac newton eyes optics is it a theory or law?

Which statements are true regarding redox reactions? (Note that in redox reactions, the molecule that "causes" another to gain or lose electrons is referred to as the agent.) Select all that apply. A. Oxidizing agents accept electrons. B.

What do the arrows and coefficients used by chemists in equations communicate?

White light, which consists of all frequencies, forms which type of spectrum?

Identify each statement as true or false. Rewrite false statements to make them correct. Sedimentary rock can be formed from changes in igneous rock, but igneous rock cannot be formed from changes in sedimentary rock.

What is the total number of atoms in this formula? NaHCO3

Which of the following are electrostatic interactions of permanent dipoles in polar molecules? A. Ion-dipole forces B. Hydrogen bonding C. Dipole-dipole forces D. London dispersion forces

Assuming the octet rule is obeyed, how many bonds and how many lone pairs will atoms of oxygen (o) and nitrogen (n) have in order to have formal charges of + 1?