The following atoms are all variations of the element carbon: 12c, 13c, and 14c due to differing
numbers of neutrons. what are these variations called?
a. isotopes
b. polymers
c. molecules
d. isomers

What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e. g. c4h10.) what is the sum of rings and double bonds in this compound?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Nonpoint source pollution is difficult to control because it