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Answer:
Air is a mixture of carbon dioxide, hydrogen and oxygen so it's a MIXTURE and NOT a COMPOUND.
Answer:
Explanation:
Atomic mass is the sum of number of protons and neutrons while atomic number is the number of protons or electrons.
A neutral atom has equal number of protons and electrons that's why atomic number could be either number of protons or electrons.
Element Symbol Atomic# Mass# Protons Neutrons
Mercury Hg 80 200 80 120
Solution:
number of neutrons = mass number - atomic number
number of neutrons = 200 - 80
number of neutrons = 120
Element Symbol Atomic# Mass# Protons Neutrons
Tungsten W 74 184 74 110
Solution:
number of neutrons = mass number - atomic number
number of neutrons = 184 - 74
number of neutrons = 110
Element Symbol Atomic# Mass# Protons Neutrons
Sodium Na 11 23 11 12
Solution:
number of neutrons = mass number - atomic number
number of neutrons = 23 - 11
number of neutrons = 12
Element Symbol Atomic# Mass# Protons Neutrons
Antimony Sb 51 122 51 71
Solution:
number of neutrons = mass number - atomic number
number of neutrons = 122 - 51
number of neutrons = 71
Element Symbol Atomic# Mass# Protons Neutrons
Silver Ag 47 108 47 61
Solution:
number of neutrons = mass number - atomic number
number of neutrons = 108 - 47
number of neutrons = 61
For a voltaic cell consisting of chromium, an electrode dipped in a 1.20 M chromium (III) nitrate solution and a tin electrode dipped in a 0.400 M tin (II) nitrate solution, the cell potential at 298 K is mathematically given as
Ecell = 0.577 V
<h3 /><h3>What is the cell potential at 298 K?</h3>
Generally, the equation for the Oxidation and Reduction is mathematically given as
Cr(s) ------------------ Cr+3(aq) + 3e- ] x 2 ...O
Sn+2(aq) + 2e- ------------ Sn(s) ] x 3 ...R
Reaction
2 Cr(s) + 3 Sn+2(aq) --------------- 2 Cr+3(aq) + 3 Sn(s)
Therefore
Eicell = - 0.14 - ( - 0.74)
Eicell = 0.60
In conclusion
Ecell = 0.577 V
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