Question

16.26
milligram of sample of an element "X" contains 1.66x1020
atoms. What is the atomic mass of element "X"?

Answer 1

answer was given: M015

Ihope thats not 1020, but

so, 1.66 x atoms weigh 16.26 milligram

1 atom will weigh milligram

so, 6.022 x atoms weigh * 6.022 x

so, the weight will be 58.986 * 1000 milligrams = 58.986 grams.

hence the atomic weight of the atom of the element x is around 59 grams