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Alla [95]
3 years ago
15

Which of the following compounds does NOT contain molecules? O CO2 ОН2 O Naci OH20

Chemistry
2 answers:
wel3 years ago
7 0

Answer:

Explanation:

NaCl does not contain molecules

sdas [7]3 years ago
6 0

NaCl does not contain molecules. NaCl is an ionic compound which is composed ions( Na+ and Cl-) that are attracted to each other because of their opposite charges. The chemical formula representation of an ionic compound is called a formula unit. Molecular compounds are covalent compounds which are made up of atoms sharing some of their valence electrons for stability.

Further Explanation:

Ionic Compounds

  • Compounds that are made up of a metal and a non-metal are called ionic compounds.
  • The metal transferred one or more valence electrons to the non-metal atom resulting in the formation of charged particles called the metal cation and the non-metal anion.
  • The cation is positively charged and the anion is negatively charged. Because of their opposite charges, the ions tend to attract each other and move closer to each other forming the crystal lattice or the 3-D arrangement of an ionic compound.
  • The simplest ratio of the ions in a crystal lattice is called the formula unit of the ionic compound and is used as the chemical formula of the ionic compound.

Covalent Compounds

  • Covalent compounds are made up of two or more non-metals that are chemically combined.
  • The non-metal atoms in the compound share valence electrons to be stable.
  • Covalent compounds are also called molecules which are groups of 2 or more atoms that are chemically bonded to each other.

Among the choices only NaCl is an ionic compound:

CO2 - carbon, C <em>(non-metal)</em> ; oxygen, O <em>(non-metal)</em> --> COVALENT

H2 - hydrogen, H <em>(non-metal)</em> --> COVALENT

NaCl - sodium, Na <em>(metal)</em> ; chlorine, Cl (<em>non-metal)</em> --> IONIC

H2O - hydrogen, H <em>(non-metal)</em>; oxygen, O <em>(non-metal)</em> --> COVALENT

Learn  More:

  1. Learn more about chemical formula  brainly.com/question/9739060
  2. Learn more about molecular formula brainly.com/question/9297668
  3. Learn more about ions brainly.com/question/269828

Keywords: ionic compound, covalent compounds, molecule

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A 5.00 L sample of helium expands to 12.0 L at which point the
mina [271]

Answer:

1.73 atm

Explanation:

Given data:

Initial volume of helium = 5.00 L

Final volume of helium = 12.0 L

Final pressure = 0.720 atm

Initial pressure = ?

Solution:

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

P₁ × 5.00 L = 0.720 atm × 12.0 L

P₁ = 8.64 atm. L/5 L

P₁ = 1.73 atm

7 0
3 years ago
If a mass of a cube were 48.0g and its volume 24.0 cm3 what would its density be
EastWind [94]

Answer:

<h3>The answer is 2 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass = 48 g

volume = 24 cm³

We have

density =  \frac{48}{24}  \\

We have the final answer as

<h3>2 g/cm³</h3>

Hope this helps you

5 0
3 years ago
Substances which will glow in the dark after being exposed to sunlight are called:
nordsb [41]
It  is called phosphorescent substances. 
6 0
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sergey [27]
C a solution because salt is a solute
5 0
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Romashka-Z-Leto [24]
It's a physical property because it doesn't change the element of the metal.
does this make sense?
8 0
3 years ago
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