Mg and I. Express your answer as a chemical formula.

The pitch of the siren of a moving fire truck changes from high to low as the fire truck passesby. What property of sound wave changes as the fire truck goes by?

A chemist dilutes 185 of the 3.0 M solution with water until a new volume of 750 is obtained. Calculate the new concentration

Time that is measured in definite periods such as minutes, day, and years is called

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number

Sulfurous acid, H2SO3, breaks down into water (H20) and sulfur dioxide (SO2). If only one molecule of sulfurous acid was involved in a chemical reaction, how many sulfur (S) atoms would be in the products?

9. I've been called a "storage tank" by those with little taste. I'm a sac filled with water, food, enzymes, or waste.

If 3.52 L of nitrogen gas and 2.75 L of hydrogen gas were allowed to react, how many litres of ammonia gas could form? Assume all gases are at the same temperature and pressure.

Which of these statements describes one way that a nonrenewable energy resource is obtained? A. Wind turbines are placed on a coastline. B. Trees are cut down in a forest. C. Water is dammed on a river. D. Uranium is mined from rock.

Octane, c8h18, is a component of fuel used in internal combustion engines. the dominant intermolecular forces in octane are

Element Y has two natural isotopes Y-63 (62.940 amu) and Y-65 (64.928 amu). Calculate the atomic mass of element Y, given the abundance of Y-63 is 69.17%?