Which of the following is not a characteristic of electromagnetic waves?

a. they can travel through a vacuum.

b. they can travel at various speeds through any one material.

c. they can be refracted.

d. they can be reflected.

How does oxygen obey the octet rule when reacting to form compounds?

5.75 moles of H2 gas to liters at STP

The opposite of vaporization is called a. condensation. b. sublimation. c. evaporation. d. freezing.

Procedure for the experiment. 1. Crush 1 stick of classroom chalk (a mixture of limestone and gypsum) finely. 2. Mix chalk into 50 ml of water in a beaker. 3. Pour the mixture through filter paper into another beaker. The water appears to be "pure.

How many sodium ions in 2.00 mol of NaCl

A discharging lead-acid battery is best described as 1.) chemical cells that use an electrical current 2.) chemical cells that produce an electrical current 3.) electrolytic cells that use an electric current 4.

Which direction does 3A + 2B = C + 2D + Heat

Which of the following shows a correct relationship between first ionization energies of the given atoms? View Available Hint (s) Which of the following shows a correct relationship between first ionization energies of the given atoms?

How many moles of AlCl3 are in 2.25L of a 0.15 molar solution? A. 0.07 moles B. 0.15 moles C. 0.34 moles D. 15

Which kind of element forms covalent bonds give two reasons for this