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OpenStudy (anonymous):
Thallium consists of 29.5%Th-203 and 70.5%Th-205. What is the relative atomic mass of thallium? a. 203amu b. 204 amu c. 203.5 amu d. 205.3amu e. 204.4 amu
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OpenStudy (jfraser):
do you know the difference between an normal average and a \(weighted\) average?
OpenStudy (anonymous):
No, I do not.
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