What volume of air is present in human lungs if 0.19 mol are present at 312 K and 1.3 atm?
A
0.066 L
B
2.9 L
с
5.5 L
D
3.7L

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

C. a pottery art studio

Steel shot weighs about two-thirds as much.hoped i can i get brainliest

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