An evaluation of R was performed, following the procedure described in this module. The barometric pressure...

An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295 K and the volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1 mL atm K.

1) How many grams of magnesium metal were used?

2) If the vapor pressure of water had not been taken into account, what would have been the calculated value of R?

3) If the syringe volume had been incorrectly read, giving a calculated system volume of 25.6 mL, what would have been the percent error in the calculated value of R?

Solutions

Expert Solution

1. We know that the ideal gas equation is written as PV=nRT

Now apply

Now we know the mass of given metal having

Now

Hence the 0.0336 gm available in Mg metal.

Answer for question number 1.

queen_honey_blossom answered 1 year ago

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