Which statement is true about a molecule? a) a molecule is identical to the component elements. b) a molecule retains the physical properties of the component elements. c) a molecule retains the chemical properties of the component elements. d) the chemical and physical properties of the molecule are different from the component elements.

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

What is the main reason why some developing countries fear the increase the free trade policies around the world?

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