53. Evaluate each of the following, and write the answer to the appropriate number of significant figures.
a. (0.102)(0.0821)(273)/(1.01)
b. (0.14)(6.022 X 1023)
c. (4.0 X 10^)(5.021 X 10-3)(7.34993 X 102)
d. (2.00 X 100)/(3.00 x 10-7)

What substance acts to prevent sudden ph changes in bodily fluids?

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?