Explanation :
Extraction : It is a separation technique in which one compound is separated from a mixture of compounds.
In a chemical process, the solution may not contain only the desired product but there maybe a mixture of products present.
So, for obtaining the desired product we need to get rid of the other products in a mixture like catalyst (if used), other by products or unreacted starting material.
For a compound to be extracted it has to be soluble in the extracting solvent.
Therefore, this process is based on the miscibility of solute and solvent in a mixture.
Answer:
Option c. is correct
Explanation:
A chemical bond enables the formation of chemical compounds depending on the nature of the participating atoms like atoms, ions or molecules.
These are formed as a result of the force of attraction between oppositely charged ions.
It is formed by the overlapping of the atomic orbitals of the two atoms.
When the length of a chemical bond is short an electron is held tighter and the bond is stronger
Answer:the CO2 molecule has an excess of electron
Answer:
300 gr.
Explanation:
if 204gr/100gr=solubility, then according to the condition solubility=612/x.
It means, 204/100=612/x, where x=612*100/204=300 gr.
Answer:
Explanation:
1.
Given parameters:
Number of moles of CaO = 0.22moles
Unknown:
Mass of CaO = ?
Solution:
Mass, number of moles and molar mass are related using the expression below;
Mass = number of moles x molar mass
Molar mass of CaO = 40 + 16 = 56g/mol
Insert the parameters and solve;
Mass = 0.22 x 56 = 12.32g
2
Given parameters:
Number of moles of NaCl = 0.83moles
Unknown:
mass of NaCl = ?
Solution:
Also,
Mass = number of moles x molar mass
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
Now insert the parameters and solve;
mass = 0.83 x 58.5
mass = 48.6g
3.
Given parameters:
Number of moles of H₂SO₄ = 0.5moles
Unknown:
mass of H₂SO₄ = ?
Solution:
Mass = number of moles x molar mass
Molar mass of H₂SO₄ = 2(1) + 32 + 4(16) = 98g/mol
Insert the parameters and solve;
Mass = 0.5 x 98 = 49g
