Check the attached file for the answer.
What is more electronegative? O or Br
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So multiply number of moles x number of atoms/mole = 1.8066 x 10^24 atoms of H2. One mole of any gas at STP has a volume of 22.4 L. So first determine the number of moles of gas you have.
for example do 7
that 's what I think
for example do 7
that 's what I think