a 10.0 l flask is used to collect 0.500 moles of n2 and 0.180 moles of o2 over water at 30°c. what is the pressure in the flask? (vapor pressure h2o(l) = 31.8 mm hg)
(need answer by tomorrow afternoon)

Find the empirical formula of each of the following compounds. given mass or for each element in a sample of the compound 3,611 g ca; 6.389 g c1

Idon't really understand this can you me and show your work.☺☺[ chemistry b] subject [ electron transfer in lonic bonds]grade( 12)

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this