# Cobalt 60 has a half life of 5 years. how many grams of a 300 g sample will remain after 20 years?

• Cobalt 60 has a half life of 5 years. how many grams of a 300 g sample will remain after 20 years?

Cobalt 60 has a half life of 5 years. how many grams of a 300 g sample will remain after 20 years? ... Cobalt 60 has a half life of 5 years. how many ...
Positive: 65 %
How many grams of a 900 g sample will remain after 90 hours? 28.125 g 14.0625 g 7.5 g 7 ... Sodium-24 has a half-life of 15 hours. How many grams of a 900 ...
Positive: 62 %

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What percentage of an iodine-131 sample will remain after 40.20 days? ... U-238 has a half-life of 4.46 x 10 9 years. ... 40.0 g x 0.1263 = 5.05 g
Positive: 65 %
21.4 Rates of Radioactive Decay. ... only 5.0 g of that isotope would remain after 29 yr, 2.5 g would remain after ... The half-life of cobalt-60 is 5.3 ...
Positive: 60 %
Half-Life Calculator. ... has a half life of 12.32 years. If you start with 20 grams of it, how much will remain after 25 years?