2 years ago

Which is the correct choice

Chemistry

1 answer:

umka21 [38]2 years ago

4 0

Answer:2 Fr because is has the lowest electronegativity 0.79

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A city continuously disposes of effluent from a wastewater treatment plant into a river. The minimum flow in the river is 130 m3

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Answer:

$2.54\ \text{mg/L}$

Explanation:

C = Allowable concentration = 1.1 mg/L

$Q_1$ = Flow rate of river = $130\ \text{m}^/\text{s}$

$Q_2$ = Discharge from plant = $37\ \text{m}^3/\text{s}$

$C_1$ = Background concentration = 0.69 mg/L

$C_2$ = Maximum concentration that of the pollutant

The concentration of the mixture will be

$C=\dfrac{Q_1C_1+Q_2C_2}{Q_1+Q_2}\\\Rightarrow C_2=\dfrac{C(Q_1+Q_2)-Q_1C_1}{Q_2}\\\Rightarrow C_2=\dfrac{1.1(130+37)-130\times 0.69}{37}\\\Rightarrow C_2=2.54\ \text{mg/L}$

The maximum concentration that of the pollutant (in mg/L) that can be safely discharged from the wastewater treatment plant is $2.54\ \text{mg/L}$ .

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2 years ago

What is atom economy?

bonufazy [111]

Answer:

The conversion efficiency of a chemical process.

Explanation:

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3 years ago

Help me please I don’t know this

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I think it’s 62 grams

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1- Science that deals with the identification and quantification of the components of material systems

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По сссстото пъпси и спп.<br> a. 120 mm =<br> What is 120 milliters to meters

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