H H G I H I H H U H 9) Calculate the cell potential for the following reaction t

Question

H H G I H I H H U H 9) Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°c. Fe(s) Fe3+(aq, 0.0011 M) I Fe3t(aq, 2.33 M) I Fe(s) A)-0.099Vv B)-0.036v C) +0.066 V D) +0.20 V E) 0.00 V 10) Galvanized iron is iron coated with A) phosphate B) magnesium C ) iron oxide E) chromium zinc 11) What is the oxidation number of nitrogen in the NH2OH molecule? A)-2 B)-1 D)-3 E) +1 12) Atoms with the same atomic number and different mass numbers A) are resonance structures B) are isotopes C) do not exist D) are isomers E) are allotropes

Explanation / Answer

10) Galvanized iron is iron coated with zinc.

It forms a coating of corrosion resistant zinc which prevents corrosive substances from reaching the more delicate part of the metal.

11) NH2OH oxidation state of Nitrogen is -1

option B

O = -2

H = +1

NH2OH = X + 2 - 2 +1 = -1

N = -1

12) The atoms with same atomic number and different mass number are called isotopes.

1H1 , 1H2 , 1H3 protium, deuterium, tritium are isotopes of Hydrogen.

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