Question

What is the number of molecules in 1000cm3 of nitrogen gas under room conditions?
A) 2.5 x 10^22
B) 4.0 x 10^23
C) 3.5 x 10^22
D) 4.5 x 10^26​

Answer 1

Answer:

A) 2.5 x 10^22

Explanation:

★Assuming that room conditions corresponds to 20 ºC and 1 atm and remembering that:

→PV = nRT

★Where P is pressure in atm, V is the volume in liters, n is the number of moles, R is the gas constant (~0.082 L-atm/K-mol) and T is the temperature (20 ºC = 293 K) in K then the number of moles of nitrogen is

→n = PV/RT = (1 * 1) /(0.082)*(293) = 1/24.03 = 0.0416 moles

★To get the number of molecules, multiply the # of moles by Avogardo’s number (6.023 * 10^23)

#of molecules = 0.0416 * 6.023 * 10^23 = 2.5 * 10^22

So, answer A

hope it's helpful to you!

Answer 2

Answer:

the above answer is correct please mark it as brainliest