How is separating a compound more complicate that separating parts of a mixture

What is the primary source of energy for hydrothermal vent communities? a. the heat of the water emerging from the vents b. oxidation of petroleum compounds from the vent water c. oxidation of hydrogen sulfide from the vent water d.

What is the equation for the energy levels of the hydrogen atom

How many hydrogen atoms are present in 5.00 mg of aspartame?

Iodine has many isotopes, but only iodine-127 is stable and is found in nature. One radioactive iodine isotope, I-108, decays by alpha particle emission. Iodine-131 is also radioactive and has many important medical uses.

Choose the correct tools for each of the following measurements. The volume of a sugar cube: The volume of an irregular block of metal:

What is the mass of 1.71 ✕ 1023 molecules of h2so4?

Which pair of elements is most likely to form an ionic bond? A:hydrogen and helium B:lithium and potassium C:potassium and iodine D:iron and zinc

What is the optimal level of fluoride in water?

Onsider this reversible reaction: PCl5 (g) + heat ↔ PCl3 (g) + Cl2 (g) Which change to the system will cause equilibrium to shift right and produce more PCl3?

How many mols of silver nitrate should be used to create 0.250 L of a 0.500 M solution? If you have 0.55 mols of NaCl and need to make a solution that is 0.0100 M, what volume of solution will you need?