Lithium has two isotopes.
li-6 and li-7.
li-6 mass = 6.015121amu
li-7 mass = 7.016003amu
lithium mass = 6.94049amu

what is percent abundance of li-6?

i know that there is an equation:
6.9409 = (% abundance li-6 * weight of li-6) + (% abundance li-7 * weight of li-7)

i don't know how to use it.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.