An imaginary gas phase reaction, according to the equation below is carried out in a closed container. 3.5 moles of A and 3.5 mo
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Answer:
73.2g
Explanation:
The reaction expression is given as:
P₄ + 6Cl₂ → 4PCl₃
Given parameters:
Volume of chlorine gas = 79.2L
Unknown:
Mass of Phosphorus needed = ?
Solution:
To solve this problem, let us find the number of moles of the chlorine gas.
Since the condition of the reaction is at STP;
22.4L of gas is contained in 1 mole
79.2L of chlorine gas will contain = 3.54mole
From the reaction expression;
6 moles of chlorine gas will react with 1 mole of P₄
3.54 mole of chlorine gas will completely react with = 0.59mole of P₄
Mass of P₄ = number of moles x molar mass
Molar mass of P₄ = 4 x 31 = 124g/mol
Mass of P₄ = 0.59 x 124 = 73.2g
- O-O single bonds and H-O single bonds in
molecules.
- H-O single bonds in
molecules.
- O=O double bonds in
molecules.
How many valence electrons do atoms in each molecule need for them to be stable?
- Each H atom needs two valence electrons to be stable.
- Each atom of an element other than H needs eight valence electron to be stable.
- There are two H atoms and two O atoms in an
more electrons to be stable.
- There are two H atoms and one O atom in an
more electrons to be stable.
- There are two O atoms in an
more electrons to be stable.
How many chemical bonds in each molecule?
Each chemical bond adds one valence electron to each bonding atom. Each chemical bond connects two atoms. As a result, each chemical bond adds two valence electrons to the molecule.
- Each
chemical bonds.
- Each
chemical bonds.
- Each
chemical bonds.
What chemical bonds are these? Again, each H atom needs only one more valence electron to be stable. It will share only one electron with O and form one H-O bond. The rest of the chemical bonds are between O atoms.
- There are two H atoms in each
- There are two H atoms in each
- There is no H atom in