Here's why:

* A mole is defined as the amount of substance that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12. This number is known as Avogadro's number, approximately 6.022 x 10^23.

* amu (atomic mass unit) is a unit of mass, not quantity. It represents 1/12th of the mass of a carbon-12 atom.

Correct statements:

* B atoms/mol of C hydrogen weigh 1.008 g: This is true. The molar mass of hydrogen is 1.008 g/mol, meaning one mole of hydrogen atoms weighs 1.008 grams.

* D carbon weighs 12.0: This is true, referring to the atomic mass of carbon (12.011 amu, rounded to 12.0).

* E Fluorine is a diatomic element: This is true. Fluorine exists as a diatomic molecule (F2) in its elemental form.

Let me know if you have any other questions!