A mole equals all of the following EXCEPT

Question

A mole equals all of the following EXCEPT...

A. 22.4 liters for volume

B. The number of atoms in exactly 15g of hydrogen

C. 6.02x10^23 atoms/molecules

D. The molar mass of a compound or element

Answer 1

Hi, Elizabeth,

Here's my rationale:

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A. 22.4 liters for volume No - there are 22.4 moles/liter of a gas at STP.

B. The number of atoms in exactly 15g of hydrogen No. - 15 g of H₂ has (15g)*(1 mole/2 grams) = 7.5 moles H₂

C. 6.02x10^23 atoms/molecules Yes. 6.02x10²³ of atoms, molecules, dollars, paperclips, anything.

D. The molar mass of a compound or element No. Molar mass depends on the element or compound and has units of (g/mole)

I can only find one true statement (C)

Bob

Answer 2

The answer is B. One mole of H₂ is 2.016 g. so 15 g of H₂ would have much more than one mole of atoms. One other thing. one mole of a gas is 22.4 liters at standard temperature and pressure.