According to the valence bond theory, a triple bond in C2H2 consists of: A. 1.5 sigma bonds and 1.5 pi bonds B. two sigma bonds and one pi bond C. one sigma bond and two pi bonds D. three sigma bonds E. three pi bonds

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

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5