The velocity of the gas is inversely proportional to the square root of the molar mass of the gass. Heavier molecules tend to travel slow compared to light molecules. Among these, He has the lowest molar mass of 4 g/mol hence this element has the greatest velocity among all molecules given.
Thallium is the element that has 81 protons in the nuclei of its atoms. I hope I answered it to the extent you needed.
Answer:
4.53gm
Explanation: n=m/M
n is # of moles
m is mass
M is molar mass
so m=n*M when you rearrange the equation
Answer:
Where is the pic or sum ? How can i tell ?
Explanation: