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OpenStudy (clamin):
PLEASE HELP!! Calculate the atomic mass of Mg if you know that 78.70% is ^24Mg. 10.13% is ^25Mg. 11.17% is ^26Mg.
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OpenStudy (caozeyuan):
that is strightforward
OpenStudy (caozeyuan):
you know what is a weighted average?
OpenStudy (clamin):
mass*abundance??
OpenStudy (clamin):
@caozeyuan
OpenStudy (caozeyuan):
yes, then add all together
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