Question

a very small gas bubble seen in a microscope has a diameter of 1 micrometer. If the pressure is one bar and the temperature is 25 degrees celsius calculate the number of gas molecules in the bubble
Convert a diameter of 1 micrometer to volume in liters. volume = (4/3)*pi*r^3. Hint:If you use radius in cm, the volume will be in cc (cubic centimeters) and 1000 cc = 1L.

Convert 1 bar to atmospheres and use PV = nRT and solve for n.

A mole contains 6.022E23 molecules. Solve for # molecules.
thank you

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