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2 answers:
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Explanation:
According to Buoyance equation,
m =
where, m = true mass
m' = mass read from the balance = 17.320 g
= density of air = 0.0012 g/ml
= density of the balance = 7.5 g/ml
d = density of liquid octane = 0.7025 g/ml
Now, putting all the given values into the above formula and calculate the true mass as follows.
m =
=
=
= 17.317 g
Thus, we can conclude that the true mass of octane is 17.317 g.
Answer:
The right solution according to the question is provided below.
Explanation:
According to the question,
(a)
The initial conditions will be:
DO =
=
=
The initial oxygen defict will be:
Do =
=
The initial BOD will be:
Lo =
=
=
(b)
The time reach minimum DO:
tc =
=
By putting the values of log, we get
=
The distance to reach minimum DO will be:
Xc =
=
=