How many helium atoms are there in a helium blimp containing 535 kg of helium?

1 Answer
anor277
Sep 15, 2017

Approx.....#8xx10^28*"helium atoms"#

Explanation:

We work out (i) the molar quantity of helium gas....

#"Moles of helium"=(535*kgxx10^3*g*kg^-1)/(4.0*g*mol^-1)=133750*mol.#

And then (ii) we mulitply this molar quantity by Avogadro's number....#N_A=6.022xx10^23*mol^-1# to get the number of helium atoms.....

#6.022xx10^23*mol^-1xx133750*mol="an unfeasibly large number"#.

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