An unknown element is a mixture of isotopes ¹²⁰X and ¹²²X. The average atomic mass of X is 121.25 amu. What is the percent abundance of ¹²²X?

What’s the percent by mass of carbon in c10h14n2

In as 1°, 2°, 3°, or 4°. be to . : °b: °c: °d: ° : °b: °c: °d: ° : °b: °c: °d: °e: °f: °g: °h: ° : °b: °c: °d: °e: °f: °g: °h: °i: °

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?