The atomic ratio between the atoms is shown by the formula itself to be 1:3 for P:Br.
The gram Atomic Mass of phosphorus is 30.9738, and the gram atomic mass of bromine is 79.904. Therefore, the ratio of phosphorus to bromine by mass is 30.9738/(3* X 79.904) or about 0.12921 to the justified number of significant digits.
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*This is an exact digit
The equation 2 P + 3 Br2 -> 2 PBr3 shows the presence of two phosphorus atoms and 6 bromine atoms on each side of the equation. Therefore, the atomic ratio of P to Br is 1:3; both integers are exact. The gram atomic masses of phosphorus and bromine are 30.9738 and 79.904 respectively. Therefore, the mass ratio of Br to P is (3*)(79.904)/30.9738 or 7.73919, to the justified number of significant digits. ______________________ *This integer is exact.
There are two bromine atoms in Br2
2Br is two separate bromine atoms. Br2 is a bromine molecule, consisting of two bromine atoms bonded together.
2 atoms of Bromine[Br] are in Molecular Bromine(Br2)
It's Bromine.
Formula: Br2
bromine oxide
a molecule of bromine
Bromine-bromine double bond.
Bromine has a diatomic molecule, Br2.
covalent because Br2 is just to Bromine atoms bonded together
Bromine is an element and has the symbol Br.