Which of the following statements about gases is not correct? A. They have much lower densities than solids or liquids. B. They form homogenous mixtures regardless of the nature of gases. C. They have strong intermolecular forces causing the particles to cling together. D. They have high compressibility. E. They do not possess a shape of their own.

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

Using complete sentences, explain how to predict the products and balance the reaction between sulfuric acid and potassium hydroxide.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?