Answer :
Avogadro's number
represents the number of units in one mole of any substance. This has the value
of 6.022 x 10^23 units / mole. This number can be used to convert the number of
atoms or molecules into number of moles. We calculate as follows:
0.340 mol Br2 ( 6.022 x 10^23 molecules / mol ) = 2.05 x 10^23 molecules
0.340 mol Br2 ( 6.022 x 10^23 molecules / mol ) = 2.05 x 10^23 molecules
Answer: [tex]2.05\times 10^{23}[/tex] molecules
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
1 mole of [tex]Br_2[/tex] contains = [tex]6.023\times 10^{23}[/tex] molecules of bromine
0.340 mole of [tex]Br_2[/tex] contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.340=2.05\times 10^{23}[/tex] molecules of bromine
Thus there are [tex]2.05\times 10^{23}[/tex] molecules of bromine present in the flask.