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1 answer:
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Answer :
Covalent compound : It is defined as the compound which is formed by the sharing of electrons between the atoms forming a compound.
The covalent compound are usually formed when two non-metals react.
Ionic compound : It is defined as the compound which is formed when electron gets transferred from one atom to another atom.
All the polyatomic ions always form an ionic compound.
Polyatomic ions : It is a charged species that composed of two or more atoms and these charged species are bonded by the covalent bond.
For the given options:
Option A:
This compound is formed by the combination of potassium, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
Option B:
This compound is formed by the combination of magnesium, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
Option C:
Hydrogen and sulfur, both are non-metals and they will form a covalent compound.
Option D:
This compound is formed by the combination of silver, which is a metal and sulfur,
which is a non-metal. Thus, it will form an ionic compound.
Option E:
Nitrogen and chlorine, both are non-metals and they will form a covalent compound.
Option F:
This compound is formed by the combination of cobalt, which is a metal and
ion which is a polyatomic ion. Thus, it will form an ionic compound.
Considering the definition of STP conditions and Avogadro's number, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.
<h3>Definition of STP condition</h3>The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
<h3>Definition of Avogadro's number</h3>Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
<h3>Amount of molecules of carbon dioxide gas</h3>At STP, 2.24 L of carbon dioxide gas is collected. So, you can apply the following rule of three: if by definition of STP conditions 22.4 L are occupied by 1 mole of carbon dioxide gas, 2.24 L are occupied by how many moles of carbon dioxide gas?
amount of moles of carbon dioxide gas= 0.1 moles
Finally, 0.1 moles of carbon dioxide gas are collected.
Then you can apply the following rule of three, considering the Avogadro's number: If 1 mole of carbon dioxide gas contains 6.023×10²³ molecules, 0.1 mole of carbon dioxide gas contains how many molecules?
amount of molecules of carbon dioxide gas= (6.023×10²³ molecules × 0.1 moles)÷1 mole
amount of molecules of carbon dioxide gas=6.023×10²² molecules
Finally, the number of molecules of gas present in 2.24 L is 6.023×10²² molecules.
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STP conditions:
Avogadro's Number:
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