List two sources from which Earth receives its energy.

Oxygen is a diatomic gas. How many oxygen molecules are in 16 grams of oxygen? A) 0.5 molecules B) 1.20 x 1024 molecules C) 3.01 x 1023 molecules D) 6.02 x 1023 molecules

The volume of a weather balloon is 200.0 L and its internal pressure is 1.17 atm when it is launched at 20 °C. The balloon rises to an altitude in the stratosphere where its internal pressure is 63 mmHg and the temperature is 210 K.

According to a weather map, a cold air mass is moving into a given area where a warm air mass is currently located. What type of weather should be expected as the cold air mass approaches?

If the initial concentration of xy is 0.050 m, what is the concentration of xy after 55.0 s?

Does sound travel faster in a warm room or a cold room? Explain your answer. Sample Response: Sound travels faster in a warm room because temperature affects the speed of a wave.

Light waves come in different wavelengths and frequencies. The color of the light we see is dependent on wavelength. When we see a rainbow, we are actually seeing

Use the periodic table to determine the number of protons in an atom of arsenic (as)

Which of the following is a strong electrolyte. sugar, sodium chloride, honey vinager, carbon tetrachloride?

How do rockets work? What chemicals are used and what reactions happens with those chemicals to make a rocket fly?

The solubility of iron (ii) hydroxide, fe (oh) 2, is 1.43x10-3 gram per liter at 25oc. a. write a balanced equation for the solubility equilibrium