1. What assumption was used to measure the number of molecules of a gas in this

Question

1. What assumption was used to measure the number of molecules of a gas in this experiment?
2. Based on the graph you created, what happened to the pressure of the ideal gas at constant temperature as the number of molecules increased?

3. Did you have to manipulate a variable to develop a linear relationship between the number of molecules and pressure? Why?
4. What was the relationship between the pressure and number of molecules?
5. What was the equation of the straight line?
6. What was the slope of the line and what does this indicate?

Explanation / Answer

1) Following are the assumption used to measure the number of molecules of gas in this experiment:

a) Temperature of gas is kept constant

b) volume of gas remains constant

2) As the number of molecules is increased the pressure of gas increases.

4) pressure is directly proportional to the number of molecules.

5) n = 1.46p-2.05 where n is number of molecules and p is pressure.

6) from the equation slope of line is 1.46 and it indicates positive relationship between number of molecules and pressure.

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