Which of following describe (s) a way in which radio waves can carry energy?

A. through rock layers, from a source, to a reflector, and then to a receiver

B. through the Earth's atmosphere, from a broadcast tower to a receiver

C. all of these

What kind (s) of intermolecular forces exist in the compounds given below? (a) CH3CH2CH2CH2CH3 (l) dispersion forces dipole-dipole forces hydrogen bonding (c) H2CO (l) dispersion forces dipole-dipole forces hydrogen bonding (b) CH3CH2OH (l)

What type of reaction does this equation represent? 2I4O9 (s) → 4I2 (s) + 9O2 (g)

What evidence of a chemical reaction might you see dropping an alka seltzer

5. Which of the following characteristics in a chemical reaction indicates that a precipitate has formed? a. The product changes c. The product becomes a color only liquid b. A gas is produced d. A solid is produced

What mass, in g, of agcl is formed from the reaction of 75.0 ml of a 0.078 m agc2h3o2 solution with 55.0 ml of 0.109 m mgcl2 solution? 2 agc2h3o2 (aq) + mgcl2 (aq) â 2 agcl (s) + mg (c2h3o2) 2 (aq) ?

3 - Which process use to convert heavier hydrocarbons into lighter (gasoline) in the absence of oxygen and in the presence of catalyst? A - Fractional distillation B - Melting C - Cracking D - Boiling

In a solution, the solute is the substance present in the greatest amount. In a solution, the solute is the substance present in the greatest amount. A. True B. False

A simple sugar (C6H12O6) occurring in plant and animal tissues

Identify any solutes and solvents present in a mixture of 0.05 mol ethanol, 1 liter water, and 0.2 g hydrogen peroxide.

Suppose the mass of a dog is 90 pounds. If 1 kilogram is equal to 2.2 pounds, what is the mass of the dog in kilograms?