How many grams are in 1.25 x 10^22 atoms of oxygen?

1 Answer
anor277
Apr 7, 2017

Approx. 0.3*g........

Explanation:

I know that 6.022xx10^23 "oxygen atoms" have a mass of 16.00*g. How do I know this? Well 6.022xx10^23 "oxygen atoms" specifies a "mole" of oxygen atoms, and these molar masses are listed and specified on the Periodic Table.

And thus mass............

=(1.25xx10^22*"oxygen atoms")/(6.022xx10^23*"oxygen atoms"*mol^-1)xx16.00*g*mol^-1

~=0.3*g

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