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pishuonlain [190]
3 years ago
9

Compare the types of evidence used by the

Chemistry
1 answer:
Rom4ik [11]3 years ago
6 0

This question is asking for a comparison between Dalton's and Greeks' atomic models by means of the evidences supporting such models. Thus, according to the following, one concludes that just Dalton's model is based on an actual law which can be experimentally substantiated whereas the Greeks' model is merely conceptual.

<h3>Atomic models:</h3><h3 />

In chemistry, atomic models have been proposed in order to understand how the atom is structured. For that reason, several models have come up and comprise, Greeks', Rutherford's, Bohr's, Thomson's, Bohr's and Schrodinger's. In such a way, each one describes a specific way the protons, electrons and neutrons are arranged or likely to be found.

However, we will only focus on Dalton's and Greeks' models. The former was based on an assumption describing the atom as a rigid sphere merely composed by randomly-arranged electrons, protons and neutrons, and the evidences were based on the law of conservation of matter, which states that matter cannot be neither created nor destroyed.

Although the Greeks' model was not experimentally substantiated, it was based on the concept of indivisibility, because the word, atom, is referred to an indivisible object, for that reason, they considered this as a concept, more than as a measurable or sizable thing.

Thus, we see just Dalton's model was based on an actual law which can be easily substantiated at the chemistry laboratory whereas the Greeks' model was just based on a concept, for that reason they differ in this aspect but agree in explanation, because none of them were able to describe the atom further.

Learn more about atomic models: brainly.com/question/1596638

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For the weak acid ch3cooh (acetic acid) that is titrated with a strong base (naoh), what species (ions/molecules) are present in
liq [111]
This is a strong base / week acid reaction.

NaOH + CH3COOH

The equilibrium of this reaction is very displaced to the right leading to the formation of the products

Na CH3COO + H2O

Na CH3COOH is a ionic compound which in solutionn will be as Na (+) and CH3COOH(-)

=> CH3COOH + NaOH = CH3 COO(-) + Na(+) + H2O

So, the predominant species in the solution are the ions Na(+) and CH3COO(-).

In general, in an strong base / weak acid titration, the predominant species present at the stoichiometric point will be the cation of the strong base (Na+ in this case) and the conjugate base of the weak acid (the anion of the weak acid, which is CH3COO- in this case).

The answer is predominantly Na(+) and CH3COO(-); predominantly because it is an equlibrium which means that the rectants will also br present.
3 0
3 years ago
Displacement reaction between copper and silver nitrate solution produces silver and copper (II) nitrate solution. Write the che
xxMikexx [17]

Answer:

Cu   +   2AgNO₃    →   2Ag   +  Cu(NO₃)₂

Explanation:

We are to give the reaction expression for this displacement reaction.

 Reactants  = copper and silver nitrate solution

 Products  = silver and copper (II) nitrate

Copper  = Cu

 Silver nitrate solution  = AgNO₃  

Silver  = Ag

copper (II) nitrate  = Cu(NO₃) ₂

So:

         Cu   +   2AgNO₃    →   2Ag   +  Cu(NO₃)₂

3 0
3 years ago
If the equilibrium constant for the reaction A 2B C 5/2 D has a value of 4.0, what is the value of the equilibrium constant for
nirvana33 [79]

Answer:

K'=\frac{1}{16}

Explanation:

Hello!

In this case, since the given reaction is:

A+ 2B \rightleftharpoons C+ \frac{5}{2} D

Whereas the equilibrium constant is:

K=\frac{[C][D]^{5/2}}{[A][B]^2} =4.0

However, the new target reaction reverses and doubles the initial reaction to obtain:

2C+5D \rightleftharpoons 2A+4B

Whereas the equilibrium constant is:

K'=\frac{[A]^2[B]^4}{[C]^2[D]^5}

Which suggest the following relationship between the equilibrium constants:

K'=\frac{1}{K^2}

So we plug in to obtain:

K'=\frac{1}{4.0^2}\\\\K'=\frac{1}{16}

Best regards!

8 0
3 years ago
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Answer:

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3 0
3 years ago
Which of the following is not true of "concentration"?
lions [1.4K]
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6 0
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