<span>.
Entropy is the degree of disorderliness in a system. Among the phases, solid
has the most ordered structure. Therefore, the lowest entropy. The least ordered is the gas phase which represents the highest entropy. Therefore, the correct answer is option D, steam. </span>
Answer : The correct option is, (a) to increase surface area of a solute
Explanation :
A mortar and pestle is a type tool that is used in the chemical laboratory for grinding and mixing the substances.
In the mortar and pestle, the pestle is a heavy or small substance that is made from porcelain material that has the rounded end. The mortar is a bowl type that is also made from porcelain material.
In the chemical laboratory, the scientists use a mortar and pestle due to increase the surface area of a solute. That means by the girding of the solute, the surface area will increases.
Hence, the correct option is, (a) to increase surface area of a solute
the balanced equation for formation of potassium oxide is as follows
4K + O₂ --> 2K₂O
molar ratio of K to K₂O is 4:2
when 4 mol of potassium reacts, 2 mol of potassium oxide is formed
when 4 mol of K reacts - 2 mol of K₂O
when 1.52 mol of K reacts - 2/4 x 1.52 = 0.76 mol of K₂O
0.76 mol of K₂O is formed
When covalent bonding is being used
I think, the question should by:
When does quenching occur in a chemiluminescence reaction?
Quenching is a process that decreases the fluorescence intensity of any compound while chemiluminescence refers to emission of cold light due to a chemical reaction. Quenching of fluorophore occurs in a chemiluminescence reaction when the fluorescence of the fluorophore is quenched that leads to the decrease in the intensity of the fluorescence.
In terms of energy transfer, quenching occurs when loss of excitation energy of the molecule takes place in a chemiluminescence reaction.
