a sample with a half life of 22.5 hours had a mass of 0.035 grams after it has decayed 180 hours. what was its mass to begin with?
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Explanation:
The sample will lose half of its mass after 4 hours. The half life.
# 8/2 = 4#
The sample will lose half of the remaining four after another half life.
# 4/2 = 2 #
The sample will lose half of its mass after 4 hours. The half life.
# 8/2 = 4#
The sample will lose half of the remaining four after another half life.
# 4/2 = 2 #
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