What’s is CO written?

Answers

Answer 1

Answer:

Answer:

CO is a chemical formula that contains one carbon atom (C) and one atom of oxygen (O). Altogether, CO translates to "carbon monoxide."

Explanation: Why monoxide and not dioxide? Well, the prefix mono means "one," and di means "two." Since there is only one oxygen atom (-oxide), then it must be monoxide! Voila!!

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The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms A. absorb energy B. absorb positrons C. emit energy D. emit positrons

Answers

The correct answer is C. To produce a bright-line spectrum, atoms will need to give off energy to then show this light. Emit means to give something off externally, so the answer is emit energy. A is incorrect because absorbing energy would be the opposite of C, because the atoms would be taking in rather than giving off light. Also, light is a form of energy, not a positron (which has the same mass as an electron but with a positive charge), making both B and D incorrect.

A bright-line spectrum is produced when the atoms in a sample of an element $\boxed{{\text{C}}{\text{. emit energy}}}$ .

Further explanation:

Atomic electronic transition:

When an atom jumps from one energy level to another energy level, an atomic electronic transition is said to take place. This occurs either due to the absorption or emission of energy by the electron.

When the transition of an atom takes place from lower to higher energy levels by the absorption of energy, it is known as an absorption process. But when atom jumps from higher to lower energy level, it releases or emits energy and therefore the process is called an emission process.

The lowest energy state of an atom is called the ground state and its energy is known as zero-point energy. It is the most stable energy level of an atom. But the state that has energy higher than that of the ground state is called an excited state. Excited states are unstable as compared to the ground state and atoms in such states tend to lose energy and jump back to the lower energy levels.

Since the atom of the sample bright-line present in the excited states, a bright-line spectrum is observed only if it emits some amount of energy and comes back to the lower energy level.

Learn more:

Component of John Dalton’s atomic theory: brainly.com/question/2357175
Basis of investigation for the scientists: brainly.com/question/158048

Answer details:

Grade: Senior School

Chapter: Atomic structure

Subject: Chemistry

Keywords: transition, ground state, excited state, energy, absorption, emission.

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Answers

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Answers

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The reactants in a chemical reaction contain 900 J of chemical energy. The products of the reaction contain 9000 J of chemical energy. Which statement best describes this chemical reaction? The reaction absorbs 9000 J of energy from the surroundings as it proceeds. The reaction releases 9000 J of energy to the surroundings as it proceeds. The reaction absorbs 8100 J of energy from the surroundings as it proceeds. The reaction releases 8100 J of energy to the surroundings as it proceeds. The answer is C

Answers

For the reaction to take place the energy of the reactants must reach to the energy level of the products:
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So the correct answer is C. The reaction absorbs 8100 J of energy from the surroundings as it proceeds.

The reaction absorbs 8100 J of energy from the surroundings as it proceeds.

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Answers

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=> mass = moles*molar mass = 639.4g

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