Answer:
6.273×10²³
Explanation:
hope this is useful friend
Potassium has twenty neutrons
12.5% of strontium-90 would remain in a sample after three half-lives have passed. Half-life automatically means 50% of the original amount would remain.
Adding 15 g of Flubber with 85 g of inert solvent will result in the formation of 15 % solution.
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-liyah❤
