Dinitrogen difluoride gas is collected at 5.0 °c in an evacuated flask with a measured volume of 50.0 l. when all the gas has ben collected, the pressure in the flask is measured to be 0.070 atm: calculate the mass and number of moles of dinitrogen difluoride gas that were collected.

0.153 moles with a mass of 10.09 grams of dinitrogen difluoride gas were collected

Explanation:

Let's apply the Ideal Gases Law to solve this:

P . V = n . R .T

0.070 atm . 50L = n . 0.082L.atm / mol.K . 278K

(0.070 atm . 50L) / (0.082L.atm / mol.K . 278K) = n

0.153 moles = n

Molar Mass N₂F₂ = 66.01 g/m

Molar mass . moles = mass

66.01 g/m . 0.153moles = 10.09 g

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants