4. Nitrogen is made up of two isotopes, nitrogen-14 and nitrogen-15. Given nitrogen's atomic weight of 14.007 amu, what is the percent abundance of each isotope?

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.