Question

(a) what is the kenetic energy in J, of an Ar atom moving at the speed of 650m/s? (b) a mole of Ar atoms moving at 650m/s ( hint: 1 amu=1.66x10^-27

Answer 1

\(K.E.=m*v^2\)

Answer 2

How do i go about finding the mass of the Ar atom?

Answer 3

divide the molar mass by avogadros number (you still need to convert to kg)

Answer 4

how do i convert to kg. im sorry this is all new to me

Answer 5

1 g = 0.001 kg

Answer 6

im still kind of lost, can you show me how to set the problem up?

Answer 7

\(KE=\dfrac{M_{Ar}}{6.022*10^{23}}*(650m/s)^2\)

Answer 8

thank you. how about part (b)

Answer 9

multiply it by avogadros number (1 mole)

Answer 10

oh thank you

Answer 11

no problem dude