How to find the average mass of one atom?

how can i find the average mass of one carbon atom in grams, it is not in my text book on how to do this, i am given on previous questions 0.08 mols of carbon and 1.00 g, i had to calculate the number of carbon atoms transferred which i calculated to be 1.003, it just said to use this info to calculate the average mass of one carbon atom.... please provide workings, i need to know how to do this i have a couple more questions like this.