Calculate the number of moles from the given number of particles. express your answer to the correct number of significant figures.

there are moles in 1.26 × 1024 particles.

2.09moles

Explanation:

One mole of an element contained 6.02*10^23 Particle

Xmol will contain 1.26*10^24 Particles

Xmol = 1.26*10^24/6.02*10^23

Xmol = 2.09moles

Explanation:

Hello,

Since the rms speed is defined as:

Whereas is the molecular mass of the gas, we solve for it since it is involved in the mathematical definition of both the most probable (mp) speed and the average speed (a):

(remember that J=kg*m/s^2 that's why the result lies on kg/mol).

Now, the mp speed is computed via:

Finally, the average speed is computed via:

Best regards.