A power plant emits 120 lb of flyash per

hour up the stack. The flow rate of the hot
gases in the stack is 25 ft3/sec. What is the
concentration of the flyash in micrograms per
cubic meter?

120Lbs/h * 454g/Lb. * 1h/3600s=15.13 g/s

of flyash.

25Ft^3/s * 1m^3/35.94Ft^3 = 0.696 m^3/s.

Concentration = 15.13g/s * 1s/0.696m^3 =
27.75 g/m^3 = 2.775*10^6 ug/m^3.

A power plant emits 120 lb of fly ash per hour up the stack. The flow

rate of the hot gases in the stack is 25 ft3/sec. What is the
concentration of the fly ash in micrograms per cubic meter?

To find the concentration of flyash in micrograms per cubic meter, we need to convert the given values to appropriate units and then apply the appropriate formula.

First, let's convert the flow rate of the hot gases from ft3/sec to m3/sec. We know that 1 ft3 = 0.02832 m3, so:

Flow rate in m3/sec = 25 ft3/sec * 0.02832 m3/ft3 = 0.708 m3/sec

Next, let's convert the emission rate of flyash from lb/hr to micrograms/sec. We know that 1 lb = 453592.37 micrograms, and 1 hour = 3600 seconds, so:

Emission rate in micrograms/sec = 120 lb/hr * 453592.37 micrograms/lb / 3600 sec/hr = 15,072 micrograms/sec

Now, we can calculate the concentration of flyash by dividing the emission rate by the flow rate:

Concentration = Emission rate / Flow rate
= 15,072 micrograms/sec / 0.708 m3/sec

To convert the concentration to micrograms per cubic meter, we need to multiply by 1,000,000:

Concentration = 15,072 micrograms/sec / 0.708 m3/sec * 1,000,000
≈ 21,317,796 micrograms/cubic meter

Therefore, the concentration of flyash in micrograms per cubic meter is approximately 21,317,796 micrograms/cubic meter.

To find the concentration of flyash in micrograms per cubic meter, we need to convert the given information into appropriate units and apply the relevant formulas.

1. Convert lb to grams:
120 lb = 120 * 453.592 grams (1 lb = 453.592 grams)

2. Convert ft^3 to m^3:
25 ft^3/sec = 25 * 0.0283168 m^3/sec (1 ft^3 = 0.0283168 m^3)

3. Calculate the concentration of flyash in grams per second:
Concentration = mass flow rate / volume flow rate
Concentration = (120 * 453.592 grams) / (25 * 0.0283168 m^3/sec)

4. Convert grams to micrograms:
Concentration = (120 * 453.592 grams) / (25 * 0.0283168 m^3/sec) * (10^6 micrograms/gram)

Now we can solve the equation to find the concentration of flyash in micrograms per cubic meter.