5. An unknown element is found with the following isotopid percent abundance: X-20 is found at an abundance of 90.50%, X-21 is found at an abundance of 27% and X-22 is found at an abundance of 9.23%. Given this information find the average atomic mass of the elementi show your work for full credit :

What is the chemical formula of the following compound

Which of the following statements about acidic water is true? a. acid has no effect on the h,o molecules. b. the solution contains a larger number of oh ions than h,o ions. c. the solution contains a larger number of h,o ions than qh ions. d. the solution contains an equal number of h,o ions and oh ions. none of the above e.

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?