What is the volume of 0.640 grams of Oz gas at Standard Temperature and Pressure (STP)? Standard Temperature and Pressure (STP) = 273 K and 1.0 atm
Convert grams to moles by dividing by molar mass of O2
a
0.449 liters
6
0.432 liters
C
0.418 liters
d.
0.406 liters

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Now consider the reaction when 45.0 g naoh have been added. what amount of naoh is this, and what amount of fecl3 can be consumed by it?

Which is a characteristic of mixtures?