You collect 35.40 mL of hydrogen gas over water at 298 K. At the time of collection, the atmospheric pressure is 680.2 mmHg. How many moles of hydrogen gas will be collected given the vapor pressure of water at this temperature is 23.8 mmHg ?

500mmHG

Explanation:

p(total) = 523.8 mmHg.

p(water) = 23.8 mmHg.

p(total) = m(water) + p(hydrogen).

p(hydrogen) = p(total) - p(water)..

p(hydrogen) = 523.8 mmHg - 23.8 mmHg.

p(hydrogen) = 500 mmHg.

mmHg or millimeter of mercury is a manometric unit of pressure.

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.