The pressure inside a pressure cooker is 2.0 atm. how many minutes will it take to cook 1.0 pound of potatoes in a pressure cooker if it takes 45 minutes to cook them in boiling water at standard pressure? given: volume of the pressure cooker is 4.0l, there are 0.25 gaseous moles, and e_a = 1.77 x 10^55 j/mol.

Rethink and reinvent

B. a graduated substance

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.

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: