A sample of chlorine has two naturally occuring 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 will be between 35 and 37
c. you can't tell what the atomic mass will be
d. the atomic mass of clorine will be more thatn 37