A measure of how much mass there is in a volume of a substance is

What do the colors produced by fireworks indicate?

Which statement is true for all equilibrium systems? A. The mass of the reactants is equal to the mass of the products. B. The addition of a catalyst changes the equilibrium concentrations. C.

Which statement describes a physical change? a. A carton of milk souring b. A piece of silver flatware tarnishing c. Dry ice subliming into carbon dioxide d. Two clear solutions forming a precipitate when mixed

Bond formed when electrons are shared between atoms?

Which of the following is a monatomic cation Cs+ PO4- NH4+ Br

What size container do you need to hold 0.0459 mol of N2 gas at stp

What happens when two or more atoms react?

If cobalt metal is mixed with excess sulfur and heated strongly, a sulfide is produced that contains 55.06% cobalt by mass. Calculate the empirical formula of the sulfide.

Calcium's atomic number is 20. it forms ions with 18 electrons. what is the electrical charge of a calcium ion?

The doldrums region on Earth is created by an amount of heating from the Sun that results in the rising of warm, moist air, low air pressure, cloudiness, high humidity, and numerous forms of severe weather, such as thunderstorms.