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Naily [24]
3 years ago
5

Many classic experiments have given us indirect evidence of the nature of the atom. Which of the experiments listed below did no

t give the results described?
A. The Rutherford experiment proved the Thomson "plum-pudding" model of the atom to be essentially correct.
B. The Rutherford experiment was useful in determining the nuclear charge on the atom.
C. Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the charge on the electron.
D. The electric discharge tube proved that electrons have a negative charge.
E. All of the above experiments gave the results described.
Chemistry
1 answer:
uranmaximum [27]3 years ago
4 0

Answer:

Option A, The Rutherford experiment proved the Thomson "plum-pudding" model of the atom to be essentially correct.

Explanation:

Thomson's plum pudding model:

Plum pudding model was proposed by J.J Thomson. In Thomson's model, atoms are proposed as sea of positively charge in which electrons are distributed through out.

Result of Rutherford experiment:

As per Rutherford's experiment:

Most of the space inside the atom is empty.

Positively charge of the atom are concentrated in the centre of the atom known as nucleus.

Electrons are present outside the nucleus and revolve around it.

As it is clear that, result of Rutherford experiment did not supported the Thomson model.

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Convert 3.2 moles of ch4 to number of molecules
REY [17]

Answer: 1.93 x 10^24 molecules

Explanation:

CH4 is the chemical formula for methane, the first member of the alkane family.

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 molecule

So, 1 mole of CH4 = 6.02 x 10^23 molecules

3.2 moles of CH4 = Z

To get the value of Z, cross multiply:

(Z x 1 mole) = (6.02 x 10^23 molecule x 3.2 moles)

Z•mole = 19.26 x 10^23 molecules•mole

Divide both sides by 1 mole

Z•mole / 1 mole = 19.26 x 10^23 molecules•mole/ 1mole

Z = 19.26 x 10^23 molecules

Place Z in standard form

Z = 1.93 x 10^24 molecules

Thus, 3.2 moles of ch4 has 1.93 x 10^24 molecules

3 0
3 years ago
What is the difference between the spectrum of hydrogen and the spectrum of sunlight
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Answer:

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The spectrum starts with red light, with a wavelength of 700 nanometers (7,000 angstroms), at the top. ... It spans the range of visible light colours, including orange and yellow and green, and ends at the bottom with blue and violet colours with a wavelength of 400 nm (4,000 angstroms).

Explanation:

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The spectrum of the Sun appears as a continuous spectrum and is frequently represented as shown below. This type of spectrum is called an emission spectrum because what you are seeing is the direct radiation emitted by the source.

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3 years ago
What is a positive effect of nuclear power plants?
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MRCORRECT has answered the question

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Nuclear Energy Pros and Cons

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In the reaction of sodium with bromine, explain which atom is reduced.
atroni [7]

Answer:

The reduced atom is Br.

Explanation:

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  • The oxidation process is the process in which electrons are lost and produce positively charged ions.
  • The reduction process is the process in which electrons is gained and negatively charge ions are produced.

  • In the reaction of chlorine with calcium:

<em>2Na + Br₂ → 2NaBr, </em>

<em></em>

Na loses 1 electrons and is oxidized to Na⁺. (Na → Na⁺ + e).

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4 years ago
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