During a test, a solution placed on a sheet of metal creates bubbles. This solution is
most likely
A. Acidic
B. Neutral
C. Basic

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years

State one important difference between a physical change and a chemical change?