CHEMISTRY HIGH SCHOOL

What are a few examples of what energy is?​

Answers

Answer 1
Answer:

✅Energy exists in many different forms✅

Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. Each forms can be converted or changed into the other forms.

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Which is a correct comparison between the modern quantum model and John Dalton’s model of the atom?A.The modern model is not as widely accepted by scientists as Dalton’s model.
B. The modern model states that atoms of all elements are identical, whereas Dalton’s model does not.
C. The modern model recognizes particles in the atom, whereas Dalton’s model does not.
D. The modern model does not explain emission spectra, whereas Dalton’s model does.

Answers

The modern model recognizes particles in the atom, whereas Dalton’s model does not. The correct option is C.

What is an atom?

An atom is a matter particle that truly represents a chemicalelement. An atom is made up of a central nucleus encircled by one or more electrons.

Each electron carries a negative charge. The nucleus is positively charged and encompasses one or more protons and neutrons, which are relatively heavy particles.

According to current theory, electrons are in orbits all over the nucleus, which is made up of protons and neutrons.

It also indicates that all orbits are not the same and that their structures differ. According to quantumtheory, waves are associated with the properties of matter.

Dalton'smodel does not recognize particles in the atom, whereas the modern model does.

Thus, the correct option is C.

For more details regarding an atom, visit:

brainly.com/question/1566330

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Depends on your definition of the modern model. The one created by Neils Bohr differs from the quantum mechanical model.

For the Quantum mechanical model, A is untrue. The QM model is far more accepted than Dalton's because it explained the workings of the atom far better than any before.
For the NB model however, that was not accepted as much because it only worked when working with Hydrogen.

B: No model states that each atom is identical.

C: Dalton's model did NOT recognize particles in the atom, but the NB and QM models do.

D: The reverse is true.

So the answer is C.

For a cell whose potential is -0.46 v with 3 moles of electrons exchanged, what is DG?DG = -nFE°cell

a.) -133 kJ
b.) +133 kJ
c.) +133,170 kJ
d.) -6.65 x 10^-3

Answers

ΔG = -nEF

ΔG = Gibbs free energy change
n = moles of electrones participated in
E = Electrode potential
F = Faraday constant

By substituting,
ΔG = -(3 mol) x 96485 A S/ mol x (-0.46) V
      = + 133149.3 J
      = + 133 kJ

Hence the answer is "b".

Since ΔG is a positive value, the reaction is non spontaneous reaction.

In which of the following is the number of neutrons correctly represented

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Answer:

there needs to be a picture to answer

What evidence caused Thomson to change Dalton's solid sphere model into the plum pudding model?

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He found that the cathode ray elements have even negligible mass as compared to atoms. So he found that electrons are actually subatomic particles of an atom. That is why he suggested the plum pudding model.
Explanation:
He discerned that atoms contain charged particles, that he was known as electrons.
In chemist theoryThe indivisibility of associate, degree atom was proved wrong: associate degree atom is often any divided into protons, neutrons and electrons. but associate degree atom is that the smallest particle that takes part in chemical reactions. in step with a chemist, the atoms of the same part are similar all told respects.

A physical change is __________ if energy is given off.Select one:
a. exothermic
b. endothermic
c. a chemical change
d. not possible

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Answer:

A

Explanation:

What occurs when there are oh ions in a solution

Answers

the solution is considered basic.  The more H⁺ a solution has the more acidic it is and the more OH⁻ a solution has the more basic it is.  pH=-Log[H⁺] and pOH=-log[OH⁻].  pOH+pH=14
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