The chemical reaction known as fluorescence.
Answer: Option (d) is the correct answer.
Explanation:
When we dissolve an ionic compound in water then it readily dissociates into ions.
This is because ionic compounds are polar in nature and like dissolves like. Since, water is also polar in nature hence,
For example, NaF is an ionic compound as it is formed by transfer of an electron from sodium atom to fluorine atom.
So, when NaF is dissolved in water then it dissociates into and ions.
As electric current occurs due to movement of electrons or ions. Therefore, a solution with and ions is able to conduct electricity.
Thus, we can conclude that if you want to conduct an electrical current, then dissolving solid NaF in water would produce a solution capable of this.
Answer:
0.02498 L
Explanation:
CaCO₃ + 2 HCl ➔ CaCl₂ + H₂O + CO₂
You have to use stoichiometry. According to the chemical equation, for every one mole of CaCO₃, two moles of HCl is needed for the reaction to occur. Before you can use this relation you need to convert grams of CaCO₃ to moles. To convert, you need to use the molar mass.
Molar mass of CaCO₃ = 100.086 g/mol
(0.2500 g)/(100.086 g/mol) = 0.002498 mol CaCO₃
Now using the relation of 1 mol of CaCO₃ for every 2 mol of HCl, convert moles of CaCO₃ to moles of HCl.
(0.002498 mol CaCO₃) (2 mol HCl)/(1 mol CaCO₃) = 0.004996 mol HCl
Since the molarity of the solution of HCl is 0.200 M (mol/L), you have to divide the amount of moles needed by the molarity of the solution.
(0.004996 mol HCl)/(0.200 M) = 0.02498 L
You will need 0.02498 L to react with 0.2500 g of CaCO₃.
Answer:
strength and vitality required for sustained physical or mental activity
Explanation:
Answer:
See explanation
Explanation:
We must take into account the order of stability of free radicals. The order of stability of free radicals is;
Tertiary>secondary>primary> methyl.
As a result of this, structure 1 involving a tertiary radical leads to the more abundant product as shown.