Determine the oxidation number of the element that is underlined within the compound. BaCrO4 (Cr is underlined)

Answer choices:

+2

+4

+6

-4

-2

-6

Your value for the stoichiometric ration (slope) is most likely slight different than the predicted value of 1. List a reasonable error that could have caused this discrepancy and briefly explain.

What happens when a substance undergoes a physical change? Some physical properties change, but the substace keeps its identity. No physical properties change, and the substance keeps its identity.

Assume you are working for a chemical company and are responsible for growing a yeast culture that produces ethanol. The yeasts are growing well on the glucose medium and there is plenty of oxygen but they are not producing alcohol.

Chromatography is the only way to separate a mixture of different kinds of molecules. True or Fales. Why?

Suppose that there are two components, A and B, in a mixture. The chemical affinity of A for the stationary phase is less than that of B and the chemical affinity of A for the mobile phase is greater than that of B.

Is a sample of liquid nitrogen more dense than a sample of nitrogen gas

You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.

Name a type of asteroid and give a description.