CHEMISTRY 1u and Factor label method. This problem makes no sense, can you help me?

Question

"Find the mass of exactly 1u in grams. Use Factor label method corresct sig figs and show all work"

I found out that 1u = 1/12 the mass of Carbon -12. So, 1/12th of 12 is 1. So the mass of 1u in grams is simply one. right?

But if I am right? then the problem has been answered, so why should I use the factor label method and sig figs? Did I mis something? Please explain.

Answer 1

I guess that u the atomic mass unit or a.m.u., sometimes also known as a Dalton.

One MOLE of 12C weighs exactly 12 g

One ATOM of 12C weighs exactly 12 u

How many atoms in a mole? How many u in a gram?

I suppose you need to trot out something like

"1 mole of u = 1 g. Therefore

1 u x NA items/mole = 1 g"

At least, that's the only way I can see to drag factor label into it.

Number of sig figs in answer = number of sig figs used for NA

Chemistry is fun. Some exercises seem designed to conceal this dangerous knowledge.