The mass spectrum of element Q shows three isotopes with the following data:
• 10.012 amu (peak intensity = 25)
• 11.009 amu (peak intensity = 55)
• 12.011 amu (peak intensity = 20)
What is the average atomic mass of element Q to two decimal places?
a) 11.31 amu
b) 11.01 amu
c) 10.96 amu
d) 11.56 amu