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The density of a mixture of O2 and N2 at STP is 1.3g/L. Calculate the partial pressure of O2
The density of a mixture of O2 and N2 at STP is 1.3g/L. Calculate the partial pressure of O2

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3 years ago

```							 given N2 and O2 mixture    i.e N2+O2      density = 1.3g/l at stp   i.e     1 lit = 1.3g therefore   22.4 lit = 22.4 * 1.3      = 29.12 g we know that at 22.4 lit the weight is known as molecular weight therfore mw(M)= 29.12 g wkt.,n=w/M       w= n*M for given eq., N2 +O2    total weight at 22.4 lit (stp) is = 28x + 32 (1-x) =>   29.12  =   28x+32-32x therefore   x = 0.72 therefore  no.of moles of N2= 0.72 and O2 = 1- 0.72 = 0.28 therefore partial pressure of O2 at stpPO2 = n O2/(n O2 + n N2 )  *  p total                                                          p O2    =   0.28/(0.28+0.72)   *    1atm                                                                      p  O2 =    0.28 atm.
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3 years ago
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