can some one please help me please

Chemistry
Tutor: None Selected Time limit: 1 Day

What is the mass of a 202.6 mL sample of hydrogen chloride gas at -12.4oC and 184.26 kPa.

A sample of hydrogen has a volume of 1143 mL when the temperature is 225.3 degC and the pressure is 1.061 atm. What will be the volume of the gas at STP?

Feb 6th, 2015

Find  The volume at STP 

 202.6 x 184.26/ 260.75 = V x  101.325/273.15

V= 202.6 x 184.26/ 101.325 x  273.15/ 260.75

= 385.95 ml

Now 1 mole of HCL (22.4 l) at STP weighs 36.44g

so 385.95 ml of HCL at STP weighs 36.44 x 0.386/22.4 = 0.628 g


Again use P1V1/T1 = P2V2/T2

1.061 x 1143/ 498.45 = 1 x V2/ 273.15

2.433  x  273.15 = V2

V2 =664.57 ml


Feb 7th, 2015

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Feb 6th, 2015
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Feb 6th, 2015
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