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2 years ago

PLEASE HELP 50 POINTS!!!!!

Chemistry

1 answer:

OLEGan [10]2 years ago

8 0

Answer: This is what an effective conclusion should include.

Restate: Restate the lab experiment. Describe the assignment.

Explain: Explain the purpose of the lab. What were you trying to figure out or discover? ...

Results: Explain your results. ...

Uncertainties: Account for uncertainties and errors. ...

New: Discuss new questions or discoveries that emerged from the experiment.

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A 50.0 mL sample of waste process water from a food processing plant weighing 50.1 g was placed in a properly prepared crucible

RideAnS [48]

Answer:

TS (total solid, mg/L) = 57,174 mg/L

VS (volatile solid, mg/L) = 24,088 mg/L

Explanation:

First step to solve this problem is to know data and questions:

Data:

Sample volume = 50 mL

Sample weight = 50.1 g

P1 (weight empty crucible) = 17.1234 g

P2 (weight after drying a 103º in oven) = 19.9821 g

P3 (weight after incinatrion 550º) = 18.7777 g

Questions:

TS = ?

VS = ?

Formula:

We need to use formulas to calculate total solid (TS) and volatile solid (VS), these are:

$TS =\frac{(P2-P1)*\frac{1,000 mg}{1g} }{Sample volumen (L)}$

$VS = \frac{(P2-P3)*\frac{1,000 mg}{1g} }{Sample volume (L)}$

We have to transform mL to L so we will divide mL by 1,000 the sample volume:

$Sample Volumen (L) = 50 mL * \frac{1L}{1,000 mL} = 0.05 L$

In the formula the value of 1,000 results by the convertion factor to transform grams to miligrams (we have to multiplie by 1,000)

Now we need to replace data on previous formulas and we will get TS and VS expressed in mg/L:

$TS = \frac{(19.9821 g-17.1234g)*\frac{1,000 mg}{1g} }{0.05L} = 57,174mg/L$

$VS = \frac{(19.9821g-18.7777g)*\frac{1,000mg}{1g} }{0.05L}=24,088 mg/L$

We divide TS and VS formula by sample volume because the exercise is asking us to express the results in mg/L.

4 0

3 years ago

HELPPPPPPPPPPPPP ME PLSSSSSSSSSSS

Pani-rosa [81]

Answer:

Option B: cooling as the lava runs down the mountain

Explanation:

The point R is basically at near the Earth's surface.

Now, we are told that rocks melt underground to form magma. This is a process of formation of igneous rocks. So, in formation of igneous rocks another process that will contribute to formation of rocks at point R is named cooling.

Cooling is a process where the larva runs down the mountain that makes magma hardened and makes it it turn into igneous rock.

6 0

3 years ago

A flexed bow has __________ energy. The energy is due to its ____________. When the string is released, work will be done to the

Phoenix [80]

Answer:

its not c or d because we know nothing will happen to the bow- so its up to a and b- making the answer b :V

Explanation:

3 0

3 years ago

Calculate the volume in liters of a 0.00183g / L mercury(1) chloride solution that contains 125 mg of (Hg 2 Cl 2 ) .

tatiyna

Answer: 68.3L

Explanation:

Density = Mass / Volume

Density = 0.00183 g/L

Mass = 125 mg = 0.125g

Volume = Mass / Density = 68.3L

6 0

3 years ago

Witch of these animals was unable to adapt to a warmer climate

ss7ja [257]

What are the animals to choose from?

6 0

3 years ago