A Sample of Chlorine Has Two Naturally Occurring Isotopes

Multiple Choice

A sample of chlorine has two naturally occurring isotopes.The isotope Cl-35 makes up 75.8% of the sample,and the isotope Cl-37 makes up 24.3% of the sample.Which of the following statements is true?

A) The atomic mass of chlorine will be less than 35.
B) The atomic mass of chlorine will be more than 37.
C) You cannot tell what the atomic mass will be.
D) The atomic mass will be between 35 and 37.
E) The atomic mass will be 24.3.