Chemistry, 18.07.2019 09:00 ladybugys

If a 12.0-g sample of radon-222 decays so that after 19 days only 0.375 g remains, what is the half-life of radon-222? 9.50 days 4.75 days 3.80 days 0.594 days

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If a 12.0-g sample of radon-222 decays so that after 19 days only 0.375 g remains, what is the half-...

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