tishfaco5000
03.09.2021 •
Chemistry
PLSSS HELP ME 1 A sample of copper has a mass of 50 g and a volume of 5 cm^3. What is its density?
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Ответ:
=14.8 grams
Explanation:
The remaining amount is normally calculated using the formula:
Remaining mass= 1/2ⁿ × Original mass where n is the number of half-lives.
Therefore, original mass= Remaining mass × 2ⁿ
Remaining mass= 2.2 grams
Number of half lives= 2.75 half lives
Original mass= 2.2g × 2²·⁷⁵
=14.8 grams