Combustion of 13.5 g of sample of an hydrocarbon yields 24.41 g CO2 and 14.49 g H2O. The molar mass of the compound is 246 g/mol. What are the empirical and molecular formulas?

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

An experimental procedure requires a 10 ml of acid to be dissolved

Stage in which a star’s outer layers have started to cool and grow outward?