The "air" in the space suit of astronauts is actually pure oxygen supplied at a pressure of 0.30 bar. the two tanks on a space suit each have a volume of 3980. cm3 and have an initial pressure of 5860. kpa. assuming a tank temperature of 16 c, what mass of oxygen is contained in the two tanks?

There are 310.7 grams of O₂ in each tank

Explanation:

To solve this problem we use PV=nRT. First we convert units:

16°C ⇒ 16+273.16 = 289.16 K5860 kPa ⇒ 5860/101.325 = 57.83 atm3980 cm³ ⇒ 3980/1000 = 3.98 L

We put the data in the equation and solve for n:

57.83 atm * 3.98 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 289.16 Kn = 9.71 mol O₂

Finally we convert mol O₂ into mass:

9.71 mol O₂ * 32g/mol = 310.7 g O₂

Ans. : frostbite is when exposure to cold temperatures causes freezing to the skin or other tissues. it most commonly affects the hands, feet, and face. the longer areas are exposed to cold, typically the worse the frostbite. the water temperature used for rewarming a frostbitten part should be : (102 -105) f degrees.