Question

Q5. What will be the mass of 12C atom in one gm?

Answer 1

The mass of a single atom of Carbon 12 is simply the mass of a mole of the stuff (12 grams) divided by Avogadro's number (6.022 x 1023). That works out to 1.9927 x 10-23 grams. ... It is "the product of 12 amu*1.66*10^-24 grams".