Chemistry help A student mixes 67.0 mL of a 2.01 M sodium hydroxide solution with 22.8 mL of 6.45 M hydrochloric acid. The temperature of the mixture rises 20.8°C.

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 three things determine the shape and size of a puddle when water is poured out onto a surface

The three types is stress that act on earths rocks are compression, tension, and