How much energy does a photon of frequency 6 x 10^12 Hz have?
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Answer:
1.1 × 10⁻⁴ M
Explanation:
Let's consider the following double displacement reaction.
CuCl₂(aq) + 2 AgNO₃(aq) → 2 AgCl(s)+ Cu(NO₃)₂(aq)
We can establish the following relations:
- The molar mass of AgCl is 143.32 g/mol.
- The molar ratio of AgCl to CuCl₂ is 2:1
The moles of CuCl₂ that reacted to produce 7.7 mg of AgCl are:
The molarity of CuCl₂ is:
Given :
Number of molecules of .
To Find :
How many moles are in given number of molecules.
Solution :
We know, in 1 moles of any element/compound contains at atoms/molecules.
So, number of moles in molecules are :
Therefore, number of moles are 8.97 .