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3 years ago

Why is it important to make observations about the reactants?

Chemistry

1 answer:

Free_Kalibri [48]3 years ago

7 0

Answer:

Reason Down below

Explanation:

It is important because when you make observation you get a clue sometimes and it reactants i feel like it also takes places with observation. :)

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IrinaVladis [17]

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3 years ago

Read 2 more answers

When 0.250 moles of KCl are added to 200.0 g of water in a constant pressure calorimeter a temperature change is observed. Given

777dan777 [17]

Explanation:

Upon dissolution of KCl heat is generated and temperature of the solution raises.

Therefore, heat generated by dissolving 0.25 moles of KCl will be as follows.

$17.24 kJ/mol \times 0.25 mol$

= 4.31 kJ

or, = 4310 J (as 1 kJ = 1000 J)

Mass of solution will be the sum of mass of water and mass of KCl.

Mass of Solution = mass of water + (no. of moles of KCl × molar mass)

= 200 g + $(0.25 mol \times 54.5 g/mol)$

= 200 g + 13.625 g

= 213.625 g

Relation between heat, mass and change in temperature is as follows.

Q = $mC \Delta T$

where, C = specific heat of water = $4.184 J/g^{o}C$

Therefore, putting the given values into the above formula as follows.

Q = $mC \Delta T$

4310 J = $213.625 g \times 4.184 J/g^{o}C \times \Delta T$

$\Delta T = 4.82^{o}C$

Thus, we can conclude that rise in temperature will be $4.82^{o}C$ .

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Explanation:

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pochemuha

Answer:

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Explanation:

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2 years ago

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SVEN [57.7K]

Answer:

The answer is c

Explanation:

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2 years ago

Why is it important to make observations about the reactants? ​

Why is it important to make observations about the reactants?