What does a chemical reaction always produce?

A) A different phase of matter (solid from liquid, gas from liquid, etc.)

B) A physical change

C) A chemical change

D) Heat

If a chemical change requires energy, which of the following could be the source of the energy? a. heating with a flame b. settling the mixture for 20 minutes c. measuring mass from a balance beam d. adding more substance to the observed material

The difenition for glands

What is a non-example of a Proton?

What coefficient is needed in front of the Carbon (C) in the reactants in order to balance the equation? C + 2SO2 - -> CS2 + 4CO 5 6 4 3 Hint: The number of atoms in the reactant, must equal the number of atoms in the product, for each element

Which class of organic compounds carry genetic information in cells?

What is the correct term for water Atom element product reactant

Do carbon atoms gain, lose, or share electrons?

In aqueous solution the ag ion forms a complex with two ammonia molecules. Write the formation constant expression for the equilibrium between the hydrated metal ion and the aqueous complex.

Which samples are substance? (A) HCI (aq) (B) NaCI (aq) (C) HCI (g) (D) NaCI (s)

2. If you add water to dilute a solution, what happens to the molarity of the compound in the solution? Explain