Calculate the number of atoms present in 52 units of He please ?

1 Answer
anor277
May 31, 2017

#"The relative atomic mass of helium is FOUR"#.

Explanation:

#"Relative atomic mass"="Mass of atom"/(1/12"th the mass of a """^12C" atom")#

#"4 atomic mass units"/("1 atomic mass unit"xx1/12)=4#

And multiplication by #"Avogadro's number"# gives the equivalent mass in grams........

So if you have a #52*"amu"# mass of helium, you should reasonably have THIRTEEN helium atoms; unlucky for some. Agreed?

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