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4 years ago

Please help i really don't wanna fail :(

Chemistry

2 answers:

sp2606 [1]4 years ago

7 0

Milligram, Decigram, Gram, Decagram, Kilogram

Milligram (0.001 gram), Decigram (0.1 gram), Gram (1 gram), Decagram (10 grams), Kilogram (1000 grams),

Hope that helps :)!

BlackZzzverrR [31]4 years ago

5 0

Answer:

Kilogram,Decagram,gram,decigram,miligram

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Chemical equation of 2 atoms of potassium metal react with 2 molecules of liquid water to produce 2 molecules of Solid potassium

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The question is telling you what are the reactants and products .

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4 years ago

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3 years ago

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4 years ago

If there is 25.0 L of gas at a temperature of 350C what is the temperature if the volume increases to 75.0L?

Zielflug [23.3K]

Answer:

The new temperature is 1596 C.

Explanation:

Charles's Law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Statistically, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio that exists between the volume and the temperature will always have the same value:

$\frac{V}{T}=k$

Being an initial state 1 and a final state 2, it is fulfilled:

$\frac{V1}{T1}=\frac{V2}{T2}$

In this case:

V1= 25 L
T1= 350 C= 623 K (being 0 C= 273 K)
V2= 75 L
T2= ?

Replacing:

$\frac{25 L}{623 K} =\frac{75 L}{T2}$

Solving:

$T2*\frac{25 L}{623 K} =75 L$

$T2=75 L*\frac{623 K}{25 L}$

T2= 1869 K= 1596 C

<u><em>The new temperature is 1596 C.</em></u>

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3 years ago

A student did not read the direction to the experiment properly and mixed up where to place the NaOH solution and the vinegar. H

Mariana [72]

Answer:

At end point there will a transition from pink to colorless.

Explanation:

As the student put the vinegar in the titrator and NaOH in the beaker, it means that he has poured phenolphthalein in the NaOH solution.

The pH range of phenolphthalein is 8.3-10 (approx), it means it will show pink color in basic medium.

So on addition of phenolphthalein in NaOH the solution will become pink in color.

When we start pouring vinegar from titrator neutralization of NaOH will begin.

On complete neutralization , on addition of single drop of vinegar the solution will become acidic and there will be complete disappearance of pink color solution in the beaker.

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4 years ago