Why is it important for an engineer who is designing a new home-cooling/heating system to have knowledge about the transfer of h
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<u>Answer:</u>
<u>For a:</u> The formula of lead (II) oxide and lead (IV) oxide is respectively.
<u>For b:</u> The formula of lithium nitride, lithium nitrite and lithium nitrate is respectively.
<u>For c:</u> The formula of Strontium hydride and strontium hydroxide is respectively.
<u>For d:</u> The formula of magnesium oxide and manganese (II) oxide is respectively.
<u>Explanation:</u>
All the given compounds are ionic compounds. This means that between the atoms complete sharing of electrons takes place.
- <u>For a:</u>
Lead is the 82th element of periodic table having electronic configuration of .
To form ion, this element will loose 2 electrons and to form
ion, this element will loose 4 electrons.
Oxygen is the 8th element of periodic table having electronic configuration of .
To form ion, this element will gain 2 electrons.
By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.
So, the chemical formula for lead (II) oxide is PbO and for lead (IV) oxide is
Thus, the formula of lead (II) oxide and lead (IV) oxide is respectively.
- <u>For b:</u>
Lithium is the 3rd element of periodic table having electronic configuration of .
To form ion, this element will loose 1 electron.
Nitrogen is the 7th element of periodic table having electronic configuration of .
To form ion, this element will gain 3 electrons.
Nitrite ion is a polyatomic ion having chemical formula of
Nitrate ion is a polyatomic ion having chemical formula of
By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.
So, the chemical formula for lithium nitride is , for lithium nitrite is
and for lithium nitrate is
Thus, the formula of lithium nitride, lithium nitrite and lithium nitrate is respectively.
- <u>For c:</u>
Strontium is the 38th element of periodic table having electronic configuration of .
To form ion, this element will loose 2 electrons.
Hydrogen is the 1st element of periodic table having electronic configuration of .
To form ion, this element will gain 1 electron and is named as hydride ion.
Hydroxide ion is a polyatomic ion having chemical formula of
By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.
So, the chemical formula for strontium hydride is and for strontium hydroxide is
Thus, the formula of Strontium hydride and strontium hydroxide is respectively.
- <u>For d:</u>
Magnesium is the 12th element of periodic table having electronic configuration of .
To form ion, this element will loose 2 electrons.
Manganese is the 25th element of the periodic table having electronic configuration of
To form ion, this element will loose 2 electrons.
Oxygen is the 8th element of periodic table having electronic configuration of .
To form ion, this element will gain 2 electrons.
By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.
So, the chemical formula for magnesium oxide is MgO and for manganese (II) oxide is MnO.
Thus, the formula of magnesium oxide and manganese (II) oxide is respectively.
Answer:
1.75
Explanation:
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