240 days is 4 times the half-life, which means that a sample of 1000 mg will decay to
after 240 days.
How many moles are present in 4.51x1015 atoms of Aluminum (Al)?
1 answer:
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It's a geometric sequence.
It's the sum for term 4 through term 15.
It's the sum for term 4 through term 15.