Question

To the correct number of significant figures, the mass of exactly 200 atoms of carbon is:

A. 12.01 amu           B. 24.02 amu           C. 240.2 amu            D. 2402 amu        E. 16.65 amu

Answer 1

answer : D. 2402 amu

explanation :

1 Carbon atom mass = 12.01115 amu

200 atoms of carbon mass = 200 x 12.01115 amu

                                           = 2402.23

                                          = 2402 amu (by using significant figure concept)