A compound is a substance composed of two or more elements that are

What is the pH of a solution with a hydronium ion concentration of 5.6 * 10-7? (pH = - log[H3O+])

Explain how crop rotation and cover crops are important to sustainable agriculture.

Which of the following solutions is a buffer? Which of the following solutions is a buffer? a solution of sulfuric acid and sodium sulfate a solution of acetic acid and sodium sulfate a solution of acetic acid and sodium acetate a solution of

Imagine that an uncharged pith ball is brought into the electrostatic field of a charged rod. The side of the pith ball closest to the negatively charged end of the rod will

When does a cold front develop? when a cold air mass invades a warm air mass when two masses of warm air meet when two masses of cold air meet when a warm air mass invades a cold air mass

Which change is most likely to occur when a molecule of H2 and a molecule of I2 collide with proper orientation and sufficient energy? 1. a chemical change, because a compound is formed 2. a chemical change, because an element is formed 3.

Which substance is a diatomic molecule? a. he b. o2 c. co2 d. h2o?

What is the difference between the electronegativity values of sodium and bromine?

Which of the following elements is the most stable element? argon, manganese, phosphorus, robidium

List results of Chemical Reactions.