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Talja [164]
3 years ago
12

In a _________the molecules are very close together

Chemistry
1 answer:
Maurinko [17]3 years ago
4 0
Is a solid because liquids are not is not that close and gas is very far apart.
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How is the atomic emission spectrum of an element produced?
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Atomic emission spectra are produced when excited electrons return to the ground state. The emitted light of electrons corresponds to energies of the specific electrons.

Explanation:

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Calculate the grams of ethane present in a sample containing 0.4271 moles if the molar mass of ethane is 30.067 g/mol.
adelina 88 [10]

The grams of ethane present in a sample containing 0.4271 mole is 12.84 g

<h3>Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation

Mole = mass / molar mass

With the above formula, we can obtain the mass of ethane. Details below

<h3>How to determine the mass of ethane</h3>

The following data were obtained from the question:

  • Mole of ethane = 0.4271 mole
  • Molar mass of ethane = 30.067 g/mol
  • Mass of ethane =?

The mass of ethane present in the sample can be obtained as follow:

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of ethane = 0.4271 × 30.067

Mass of ethane = 12.84 g

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Which concept can explain the acidic character of Carbon dioxide?​
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The concept of lewis acids and bases can explain the acidic nature of CO2. A lewis acid is a compound which can accept an electron pair whereas a lewis base is a compound which can donate an electron pair. CO2 acts as a lewis acid.

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