# #15 on 1001 MCAT questions in Gen Chem

#### dolimitless

I know its an MCAT book, but im using it to study for the DAT.

15). If A ( the mass number) of an element "E" has a value of 22, then one mole of element E:

A. has a mass of approximately 11 amu
B has a mass of approximately 22 amu
C. weighs approximately 22 grams
D. weighs approximately 22 x 6.02 x 1023 grams.

The answer they give is C, which is right. But can't it be B also?

#### dl9006

10+ Year Member
5+ Year Member
I know its an MCAT book, but im using it to study for the DAT.

15). If A ( the mass number) of an element "E" has a value of 22, then one mole of element E:

A. has a mass of approximately 11 amu
B has a mass of approximately 22 amu
C. weighs approximately 22 grams
D. weighs approximately 22 x 6.02 x 1023 grams.

The answer they give is C, which is right. But can't it be B also?
i think 22 amu is the mass of one atom, not a mol.

#### Danny289

##### Member
10+ Year Member
I know its an MCAT book, but im using it to study for the DAT.

15). If A ( the mass number) of an element "E" has a value of 22, then one mole of element E:

A. has a mass of approximately 11 amu
B has a mass of approximately 22 amu
C. weighs approximately 22 grams
D. weighs approximately 22 x 6.02 x 1023 grams.

The answer they give is C, which is right. But can't it be B also?
amu use for one atom, when you have Mole that means 6.02 X10^23 of atoms.

OP
D

#### dolimitless

Nevermind, I guess its because moles are always expressed in grams, hence grams/mole