What characteristic of an element determines its specific isotope?

a. number of protons.

b. number of neutrons.

c. number of electrons.

d. number of quarks.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

Explain how global warming could have affected yellowstone frog and salamander habitat's, resulting in changes in the populations of these species