1. A 36.0-L cylinder of a gas used for calibration of blood gas analyzers in medical laboratories contains 350 g of CO2, 805 g of O2, and 4880 g of N2. At 25 °C, what is the pressure in the cylinder in kilopascals? Please show the equation used to find the answer.

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B? i feel like this is a trick  

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b