Question

How do you calculate 1 amu in grams using the C-12 atom?

Answer 1

`"1 u" = 1.661 × 10^"-24"color(white)(l) "g"`

Explanation:

We know that

`"1 C atom = 12 u"`

and

`6.022 × 10^23color(white)(l) "C atoms" = "12 g"`

∴ `"1 u" = 1 color(red)(cancel(color(black)("u"))) × (1 color(red)(cancel(color(black)("C atom"))))/(color(red)(cancel(color(black)(12))) color(red)(cancel(color(black)("u")))) × (color(red)(cancel(color(black)(12))) "g")/(6.022 × 10^23 color(red)(cancel(color(black)("C atoms")))) = 1.661 × 10^"-24"color(white)(l) "g"`