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Tomtit [17]
3 years ago
6

Brainliest will be given! Please help!

Chemistry
1 answer:
Marat540 [252]3 years ago
7 0
Use this formula to find it
amount \: left = starting \: amount \:  {( \frac{1}{2})}^{ \frac{time \: gone}{half \: life} }
Starting amount = 40g
Half life = 4 days
Time gone = 12 days
Amount left = 40 (1/2)^12/4
= 40 (1/2)^3
= 40 (1/8)
= 5 grams
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