What is the difference in energy between an electron in 1s and an electron in 4s.

Which type of reaction will occur when equal volumes of 0.1 M HCl and 0.1 M NaOH are mixed 1. Neutralization 2. Ionization 3. Electrolysis 4. Hydrolysis

Compounds keep the chemical properties of the elements they are made from.

Is the state of the air in an isolated room completely specified by the temperature and the pressure? Explain.

The first organism in a food chain muust always be what type e of organism

What vitamin a compounds bind with opsin to form rhodopsin?

Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid. Hydrogen bonds are stronger than covalent bonds. Liquid water is less dense than solid water.

Which of the following elements has the fewest valence electrons?. a. beryllium. b. boron. c. carbon. d. lithium

How many molecules are in 4.50 moles of H2O? A. 450 molecules B. 6.02 x 1023 molecules C. 2.71 x 1024 molecules D. 3.00 molecules

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride

If the mass of a material is 111 grams and the volume of the material is 11 cm3, what would the density of the material be?