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den301095 [7]
3 years ago
11

How many electrons are in an atom of elemental sodium?

Chemistry
2 answers:
Hitman42 [59]3 years ago
8 0
B) Equal to the number of protons
Karo-lina-s [1.5K]3 years ago
7 0

correct answer is B) equal to the number of protons

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A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should sh
34kurt

The constant used for the absorption of heat by the sample in melting is +\Delta H_{fus}.  Thus, option A is correct.

The chemical reaction has been defined as the energy in which the energy has been released or absorbed for the breaking of bonds in the reactants and the formation of product.

<h3>Constant for energy absorbed</h3>

The energy has been absorbed in the melting of the copper sample. Thus, the sample has been converted from the solid to the liquid state.

The change in energy with the conversion in solid and liquid state has been termed as heat of fusion.

The energy has been absorbed by the system, thus it has been marked with the positive sign.

Therefore, +\Delta H_{fus} has been the constant used for the absorption of heat by the sample in melting. Thus, option A is correct.

Learn more about melting sample, here:

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2 years ago
Which law was used to determine the relationship between the volume and the number of moles?​
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Answer:

The Mole-Volume Relationship: Avogadro's Law. A plot of the effect of temperature on the volume of a gas at constant pressure shows that the volume of a gas is directly proportional to the number of moles of that gas. This is stated as Avogadro's law.

Explanation:

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3 years ago
All living things are made up of molecules that have carbon.<br> O True<br> O False
Paha777 [63]

Answer:

True

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Because Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates.

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Help me please guys :)
nika2105 [10]

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1. Methane

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3. not sure : )

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Changing the number of<br> element<br> produces isotopes of the same
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An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

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