If based on the procedure described in the lab procedure, the data is Mass (befo

Question

If based on the procedure described in the lab procedure, the data is Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.042 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.783 g Volume of water displaced from the wash bottle 144 mL Temperature of the CO_2(g) 293.6 K CO2(g) pressure 0.986 atm Calculate each of the items below to three significant figures. Enter only the numerical value in the answer box. a) Calculate the mass of CO_2(g) _____ b) Calculate the moles of CO_2(g) _____ c) Calculate the density of CO_2(g) in g/L _____ d) Calculate the molar mass of CO_2 assuming a temperature of 293.6 K. _____

Explanation / Answer

Volume of water displaced from the wash bottle = 144ml =0.144Litre

Pressure of CO2 = 0.986atm

Temperature = 293.6K

Ideal gas equation , PV= nRT

Therefore, n = PV/RT

Where, n= No of mole, P= pressure,

R= gas constant,0.082057(liit atm/mole K)

T= Temperature in K

Substituting the values

n=(0.986atm×0.144litre)/0.082057(litre atm/K mole)× 293.6K

= 0.00589mole

Mass of CO2 = 26.042g - 25.783g = 0.259g

Density of CO2 = 0.259g/0.144litre = 1.8g/litre

Molar mass of CO2 = mass of CO2/mole of CO2

= 0.259g/0.00589

= 44 g/mole

  

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