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erastovalidia [21]
3 years ago
5

Why do we use moles when calculating empirical chemical formulas, but not the mass?

Chemistry
2 answers:
Arada [10]3 years ago
8 0

Answer:

because moles is the chemical unit*Avogadro's number, meaning it's the amount of atoms in the given unit.

Explanation:

MrMuchimi3 years ago
8 0
Because it’s the amount of atoms in the unit
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The sum of the number of proteins and neutrons in an atoms nucleus is its __________ ___________.
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Explanation:

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Is each of the following statements true or false? Correct any that are false.
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<u>True,</u> A mole of one substance has the same number of atoms as a mole of any other substance.

<h3>What is a mole?</h3>

Mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles.

The mole designates an extremely large number of units, 6.02214076 × 10^{23}. The General Conference on Weights and Measures defined the mole as this number for the International System of Units (SI) effective from May 20, 2019. The mole was previously defined as the number of atoms determined experimentally to be found in 12 grams of carbon-12.

The number of units in a mole also bears the name Avogadro’s number, or Avogadro’s constant, in honour of the Italian physicist Amedeo Avogadro (1776–1856). Avogadro proposed that equal volumes of gases under the same conditions contain the same number of molecules, a hypothesis that proved useful in determining atomic and molecular weights and which led to the concept of the mole.

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What keeps the planets in orbit in our solar system
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Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: Cl- S -2 K+ C
irinina [24]

Answer:

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Explanation:

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S²⁻:

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When it gains 2 electrons and be S²⁻, then it has 18 electrons a neutral Ar.

K⁺:

Neutral atom of K, atomic number 19, has 19 electrons.

When it losses electron and be K⁺, then it has 18 electrons a neutral Ar.

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Neutral atom of Ca, atomic number 20, has 20 electrons.

When it losses 2 electrons and be Ca²⁺, then it has 18 electrons a neutral Ar.

Ne:

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<em>So, the right choice is: Ne.</em>

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