https://brainly.com/question/28587923
The number of atom in given 31.0 gram of Bromine ,first of all we convert It into mole than find number of atom-
The molar mass of bromine is 70.90g/mole
To convert the mole we set up the following ratio:-
31.0*(1 mole Br/79.90Br)= 0.388 mole of Br
Next is to convert mole to Atom
1 mole Atom = Avogadro's Number(6.022*10^23)
To convert from mole to Atom we set up another ratio:-
No. of atom = (0.388*6.022*10^23) Atom
= 2.34*10^23 Atom of Br in the sample
The number of atom in 31.0 gram of Bromine is 2.34*10^23 atom.
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