Which of the following would most likely contain a fossil?

Energy in an ecosystem flow from consumers to producers. True of False

What is the formula of peroxide? a. SO3 (2-) b. SO4 (2-) c. O2 (2-) d. OH (-)

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? Burning fossil fuels contributes to climate change. Burning fossil fuels takes place inside expensive fuel cells.

Which statement describes the particle of an ideal gas? (1) The particles move in well-defined, circular paths (2) When the particles collide, energy is lost (3) There are forces of attraction between the particles (4) The volume of the particle is

The following forces act on an object: 3N left, 2N up, 1N right, 2N down. What is the total force on the object? Give the size and direction.

Explain your reasoning for your formula prediction for Ba+2 and S-2

Does the solubility of borax increase or decrease as temperature increases?

Which statement correctly describes a reaction in dynamic equilibrium? At dynamic equilibrium, the reactions stop and the amounts of reactants and products do not change.

The density of copper is 8.9 g/ml. How many Cm of copper are in 0.283kg of copper?

The molar volume of oxygen, O2, is 3.90 dm3 mol-1 at 10.0 bar and 200 degree centigrade. Assuming that the expansion may be truncated after the second term, calculate the second virial coefficient of oxygen at this temperature.