An aqueous solution of concentrated hydrobromic acid contains 48% HBr by mass. If the density of the solution
is 1.50 g/mL, what is its concentration :
(A) 11.4 mol/L
TB) 8.9 Toll
(C) 5.9 moll
(D) 18.5 mol/L
Calculate the percent of BaO in 20
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Answers
Answered by
2
Answer:
C is the correct answer
Answered by
1
Answer:
Explanation:Explanation:
We're asked to find the (molar) concentration of
HBr
in solution, given its mass percentage and density.
To do this, we'll first assume there is
1
L
of solution, so the density is also written as
1.5
g/mL
=
1500
g/L
We're given that
48
%
of the mass (
1500
g
) is
HBr
, so the mass of
HBr
is
0.48
⋅
1500
g soln
=
720
l
g HBr
−−−−−−−−−
Now, we use the molar mass of
HBr
(
80.912
g/mol
) to calculate the number of moles:
720
g HBr
(
1
l
mol HBr
80.912
g HBr
)
=
8.9
mol HBr
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