Which one of the following is NOT a colloid? (There can be a multiple choice)

a. ocean water

b. butter

c. fog

d. mayonnaise

e. blood

carbon has an average atomic mass of 12.011 amu (as given on the periodic table). Which isotope of carbon do you think is more abundant: carbon-12 or carbon-13? Explain your answer.

Use the References to access important values if needed for this question. Radioactive decay can be described by the following equation where is the original amount of the substance, is the amount of the substance remaining after time, and is a

A sample of inert gas has an initial volume of 5.6 L at a pressure of 735 mm Hg. If the volume of gas is increased to 9.4 L, what is its pressure?

The half-life of C-14 is 5470 years. If a particular archaeological sample has one-quarter of its original radioactivity remaining, what is the best estimate for its age?

Which organism has cerebral ganglia in its head connected to ladder-like arrangements of nerve fibers? spider frog seahorse flatworm

What statement defines enzymatic activity

Volcano formation is directly related to plate tectonics. True False

The solubility of nitrogen gas at 25 degrees C and 1 atm is 6.8 x 10^ (-4) mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm, what is the concentration (molarity) of dissolved nitrogen? 5.2 x 10^ (-4) M 1.1 x 10^ (-5) M 4.

Units of work would be equivalent to a Newton times a meter.

Which of the following terms would you use to describe the motion of Earth in its orbit around the Sun? a. rotation b. ellipse c. solstice d. revolution