What is the mass of 5.22×10^21 platinum atoms??
2 answers:
Answer:
1.69g
Explanation:
To solve the problem you need to know the Avogadro´s number and the molar mass of the Platinum.
The Avogadro´s number is . For the platinum it means that there are
atoms of platinum for each mol.
And the molar mass for the platinum is , that is the mass in grams of each mol of platinum.
So, with this information we can solve the problem as follows:
of Pt
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Answer:
Explanation:
The half-cell reduction potentials are
Ag⁺(aq) + e⁻ ⇌ Ag(s) E° = 0.7996 V
Fe²⁺(aq) + 2e⁻ ⇌ Fe(s) E° = -0.447 V
To create a spontaneous voltaic cell, we reverse the half-reaction with the more negative half-cell potential.
The anode is the electrode at which oxidation occurs.
The equation for the oxidation half-reaction is