27. What did Rutherford conclude about the structure of the atom? A. An atom is indivisible,

b. Electrons make up the center of an atom. An atom carries a positive charge.

d. An atom contains a small, dense, positively charged central region.
C.
. A nuclear particle that has about

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

How many moles of gas are present if p=11 atm, v=12l, t=185k?

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