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3 years ago

Is VAL ("23")+5=28? It is a true and false question.

Chemistry

1 answer:

Flauer [41]3 years ago

5 0

Answer:

True

Explanation:

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VLD [36.1K]

Answer:

it's-D...........................

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3 years ago

A food processing plant discharges 40 cfs (cubic feet per second) of process water containing an ultimate BOD (L0) of 25 mg/L an

Feliz [49]

Answer:

The right solution according to the question is provided below.

Explanation:

According to the question,

(a)

The initial conditions will be:

DO = $\frac{(40\times 1.8)+(260\times 7.6)}{40+260}$

= $\frac{2048}{300}$

= $6.826 \ mg/L$

The initial oxygen defict will be:

Do = $8.5-6.826$

= $1.674 \ mg/L$

The initial BOD will be:

Lo = $\frac{(40\times 25)+(260\times 3.6)}{40+260}$

= $\frac{1936}{300}$

= $6.453 \ mg/L$

(b)

The time reach minimum DO:

tc = $\frac{1}{(kr-kd)} ln{(\frac{0.76}{0.61} )[1-\frac{1.674(0.76-0.61)}{0.61\times 6.453} ]}$

= $\frac{1}{0.15}\times ln \ 1.158$

By putting the values of log, we get

= $0.973 \ days$

The distance to reach minimum DO will be:

Xc = $\frac{1.1\times 3600\times 24}{5280}\times 0.973 \ days$

= $18\times 0.973$

= $17.5 \ miles$

8 0

3 years ago

Dana wants to determine the molar mass of magnesium hydroxide, Mg(OH)2. Which calculation should she use?

aleksandr82 [10.1K]

Answer C. is correct:

(molar mass of Mg) + (2 x molar mass of O) + (2 x molar mass of H)

:-) ;-)

3 0

3 years ago

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How does the density of a Hershey bar compare to the density of the a half bar?How does the density of a Hershey bar compare to

Lostsunrise [7]

IDensity is calculated by mass divided by volume. As you half the Hershey bar, mass and volume change by the same proportion. Therefore, density is the same.

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4 years ago

How many molecules are in 165 g of carbon dioxide?

devlian [24]

The molar mass of CO2 is 44 grams per mole.

165 grams / 44 grams per mole of CO2 = 3.75 moles CO2

Using Avogadro’s law where 1 mole of substance equals 6.023 x 10^23 molecules

3.75 moles CO2 (6.023 x 10^23 molecules /mole) = 2.26 x 10^24 molecules CO2

3 0

3 years ago

Read 2 more answers

Is VAL ("23")+5=28? It is a true and false question.​

Is VAL ("23")+5=28? It is a true and false question.