essenceallisonp03ino essenceallisonp03ino
  • 27-11-2017
  • Chemistry
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How many moles of gas are present when you collect 35.83 mL of the gas over water at 25.3°C and 0.97 atm?

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Dejanras
Dejanras Dejanras
  • 29-11-2018

Answer is: 0.00142 moles of gas are present.

Ideal gas law: p·V = n·R·T.

p = 0.97 atm.; pressure of the gas.

T = 25.3 + 273.15.

T = 298.45 K; temperature of the gas.

V = 35.83 mL ÷ 1000mL/L.

V = 0.03583 L; volume of the gas.

R = 0.08206 L·atm/mol·K; gas constant.

n = 0.97 atm · 0.03583 L ÷ (0.08206 L·atm/mol·K · 298.45 K).

n = 0.00142 mol; amount of the gas.

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