Capillary tube diameter( 0.1 cm) is placed in a water cleaner for a distance of ( h cm). if the pressure at this distance is (10 cm Hg) and the maximum air pressure is insufficient to break the bubble and its amount (11.6 cm) , calculate the surface tension of this solution. (Use the Young–Laplace Equation)

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The mole ratio of hydrogen to ammonia is 3: 2.

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.