Explanations:- As per the significant figures rule, In multiplication and division, we go with least number of sig figs.
4.03 has three sig figs where as 0.0000035 has two sig figs only, The zeros in this number are not sig figs as they are just holding the place values. As the least number of sig figs here is two, the answer needs to be reported with two sig figs only.
Explanation:
It is known that equation for steady state concentration is as follows.
where, Q = flow rate
k = rate constant
V = volume
C = concentration of the entering air
Formula for volume of the box is as follows.
V =
=
=
Now, expression to determine the discharge is as follows.
Q = Av
=
= 0.4
And, m (loading) = 10kg/s,
k = 0.20/hr
as 1 L (if u want kg/L as concentration)
Now, calculate the concentration present inside as follows.
= 25
Now, we will calculate the concentration present outwards as follows.
,
and, t =
= 25000 s or 6.94 hr
Hence,
= 10.47
Thus, we can conclude that the the steady-state concentration if the air is assumed to be completely mixed is and
.