A gaseous sample containing a mixture of only nitrogen andcarbon monoxide, occup

Question

A gaseous sample containing a mixture of only nitrogen andcarbon monoxide, occupies a volume of 3.05L at 22°C.
The partial pressure of N2 is0.130 atm and that of CO is 0.355 atm. A) What is the total pressure of the mixture? B) What is the mole fraction ofN2 in the mixture? C) How many moles of N2 are in the sample? D) What is the total mass of the sample? A gaseous sample containing a mixture of only nitrogen andcarbon monoxide, occupies a volume of 3.05L at 22°C.
The partial pressure of N2 is0.130 atm and that of CO is 0.355 atm. A) What is the total pressure of the mixture? B) What is the mole fraction ofN2 in the mixture? C) How many moles of N2 are in the sample? D) What is the total mass of the sample?

Explanation / Answer

A) Total pressure of a gaseous mixture is equals tothe sum of the partial pressures of each.        so total pressure =pratial pressure of N2 + partial pressure of CO                                 = 0.130atm + 0.355atm                                 = 0.485atm B) we know , pV = nRT                      nN2 = (pN2 *V) /(RT)                             = (0.130atm*3.05L) / (0.0821Latm.mol^-1K^-1 * (22+273)K)                             =0.0164mol      similarly,  nCO= (pCO *V) /(RT)                           = (0.355atm*3.05L) / (0.0821Latm.mol^-1K^-1 * (22+273)K)                           = 0.0447mol Mole fraction of N2 = 0.0164mol / (0.0164mol +0.0447mol) = 0.2684 C) we know , pV = nRT                      nN2 = (pN2 *V) /(RT)                             = (0.130atm*3.05L) / (0.0821Latm.mol^-1K^-1 * (22+273)K)                             =0.0164mol                      nN2 = (pN2 *V) /(RT)                             = (0.130atm*3.05L) / (0.0821Latm.mol^-1K^-1 * (22+273)K)                             =0.0164mol D) mass = moles * molar mass     so total mass of sample = 0.0164mol*(28g/mol) + 0.0477mol *(28g/mol)                                        = 1.7108g

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---