Unit Conversions 2 - Scientific Notation and Significant Digits Lesson Info
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1000 motors
1 kilometer
100 centimeters
1 meter
1000 millimeters
1 meter
The largest human cell is the egg cell, with a
diameter of 121 micrometers. What is the
diameter of a human egg cell in millimeters?
10 millimeters
1 centimeter
1000 micrometers
1 millimeter
1000 nanometers
1 micrometer
1.0.10nm
1 meter
1.0.106 pm
1 meter
9.461. 1012 km
1 light year
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121 micrometers
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answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

the answer is b. dilution