Question

What will be the mass of one atom of Carbon 12 isotope in grams?

Answer:

Mass of one atom of C-12 isotope is 1.99269*10^-23 grams.

We know that the atomic mass of carbon-12 = 12u
Therefore, molar mass of carbon = 12g
Number of carbon atoms in 1 mole of carbon = 6.022*10²³
Therefore, we can say that mass of 6.022*10²³ atoms of carbon is 12g and so 1 atom of carbon have mass equal to 12/(6.022*10²³) = 1.99269*10^-23 grams.


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