Given the reaction that occurs in an electrochemical cell: Zn(s) + CuSO4(aq) --> ZnSO4(aq) + Cu(s) During this reaction, the
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Answer:
107.9g
Explanation:
Given parameters:
Molar mass of Cu = 63.5g/mol
Molar mass of Ag = 107.9g/mol
Mass of reacting Cu = 31.75g
Unknown:
Mass of Ag produced = ?
Solution:
The reaction equation is given as;
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
The equation is balanced.
We start by find the number of moles of the known;
Number of moles =
Number of moles of Cu = = 0.5moles
From the balanced equation;
1 mole of Cu produced 2 moles of Ag;
0.5 mole of cu will produce 0.5 x 2 mole of Ag = 1 mole of Ag
Now;
Mass of Ag = number of moles x molar mass
Mass of Ag = 1 mole of Ag x 107.9g/mol = 107.9g
Given :
A seawater sample contains 2.7 mg chlorophyll m⁻³.
To Find :
What is the chlorophyll concentration in units of mg L⁻¹.
Solution :
We know, 1 m³ = 1000 L .
So, 1 m⁻³ = 10⁻³ L⁻¹
Concentration is :
Therefore, the chlorophyll concentration in units of mg L⁻¹ is .
Hence, this is the required solution.