why is it generally preferable to use absorbance as a meaure of absorption rather than %transmittance?

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

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

What are the chemical names of these compounds? ke: mg3n2: reset next