Question 12 -16 Which of the following samples has the most moles of gas? 5.00L

Question

Question 12 -16 Which of the following samples has the most moles of gas? 5.00L of CH4 gas at 25 0C and 760 mm Hg 0900 L of F2 gas at 25 0C and 760 mm Hg 1.90 L of NH3 gas at 25 oC and 760 mm Hg 320 L of Ne gas at 25 OC and 760 mm Hg 1.70 LofN2gas 250cand 760mmm Hg Question 13 -16 If you lower the temperature of a 1.0 L flask of 02 gas, which is false (assuming the volume does not change)? The molecules will hit the sides of the container less often (2 The molecules will have a large distance between them compared to their size. The pressure will decrease 4 The average speed of the molecules will increase

Explanation / Answer

12) for gases

PV = nRT

in all the given cases , P and T are the same , also R is a constant

so

n is proportional to V

higher the volume of the gas , higher the moles

take a look the given options

of them

CH4 gas has the largest volume of 5 L

so it has the most moles of gas

the answer is 1) 5 L of CH4 gas at 25 C and 760 mm Hg

13)

by defintion

average speed is proportional to temperature

so if the temperature is lowered , the average speed will also be lowered

so the false statement is

4) the average speed of the molecules will increase

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