<h3><u>Compare and contrast between bonds and molecules of polar and non-polar:</u></h3>
- Non-polar covalent bonds are a type of covalent bond in which a pair of electrons is shared with each other between two atoms.
- Polar covalent bond is a type of covalent bond in which pair of electrons are not equally shared between two atoms. We can also say bonds are polar when one element in a compound is more electronegative than the other.
- The bond shared in the compound of carbon dioxide between carbon and oxygen atoms is non-polar covalent bond whereas the shared in the compound of water between hydrogen and oxygen atom is polar-covalent bond.
- Polar molecules are those molecules where there is an “electronegativity difference between the bonded atoms”.
- For eg: Water - , Ammonia - , Sulfur dioxide - , Hydrogen sulfide - , Ethanol - , etc.
- Non-polar molecules are those molecules sharing equal electrons between “atoms of a diatomic molecule” or large molecule cancel each other.
- For eg: Carbon dioxide - , Benzene - , Carbon tetrachloride - , Methane - , Ethylene - , etc.
Answer:
The vapor-pressure lowering of the solution is 2,39 mmHg
Explanation:
The Raoult's law says that the vapor pressure of a solvent in a solution is always lower than the vapor pressure of the pure solvent. The vapor pressure lowering is directly proportional to the mole fraction of the solute. In mathematical terms that means:
ΔP = <em>(1)</em>
Where:
ΔP is the vapor-pressure lowering of the solution
is molar fraction of solute
And is the capor pressure of the pure solvent (86,0 mmHg)
The moles of naphthalene are:
<em>9,36x10⁻³ moles solute</em>
And the moles of benzene are:
0,328 moles solvent
Molar fraction of solute is:
<em>0,0278</em>
Replacing in (1)
<em>ΔP = 2,39 mm Hg</em>
I hope it helps!
Answer:
The meaning of monovalent is having a valence of one.
Explanation:
Having a specific immunologic activity against a single antigen, microorganism, or disease a monovalent vaccine.
Solar energy is a non-pollutant, which means it doesn't pollute the environment. so therefore A is the correct answer.
The unit of 16.8 /kjg contains a mistake.
I just can help you by assuming the right units.
I will assume 16.8 kj /g. This is a rate, which means that 1 g of reactant will produce 16.8 kj of heat.
To calculate the mass of reactant that will produce 800j first you multiply by the conversion factor to obtain kj, and the you divide by the rate of heat, 16.8 kj/g
heat * conversion factor / rate
(800j) * (1kj/1000j) / (16.8 kj / g) <--- answer