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pre lab question: 1. If I ask you to determine the mass of CO2 gas in...

pre lab question:

1. If I ask you to determine the mass of CO2 gas in your flask, how you will determine it?

2. This experiment will require you to know the volume of the air/gas present in your flask. How will you measure this volume?

3. If you are use a graduated cylinder with markings in increments of 0.2 mL to measure liquids, you should interpolate and record volume readings to the nearest what?

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Answer #1

1.(9) Use the formula (Ideal gas law) PV=nRT. Calculate the formula mass in g/mol.

3. If a graduated cylinder with marking increments of 0.2ml is used to measure liquids then taking readings is as follows:

The liquid surface is curved(U shaped) rather than horizontal due to relatively strong attractive force between liquid and glass. This curved surface is called Meniscus. Bottom surface of this meniscus (Lower meniscus) is the actual reading for the liquids taken in graduated cylinder.

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