Chemistry, 23.10.2019 07:00 esmeralda1209

1. mendeleev organized elements in his periodic table in order of increasing
2. you are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. you would select the compound with the melting point.
3. two factors that determine whether a molecule is polar are the types of atoms in the molecule and the of the molecule.

Answers: 3

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1. Mendeleev organized elements in his periodic table in order of increasing .
atomic number

2. You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the melting point.
highest melting point

3. Two factors that determine whether a molecule is polar are the types of atoms in the molecule and the of the molecule.
shape of the molecule

Answer from: Quest

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( $n_2$ ) .

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.

Answer from: Quest

no statements shown

the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

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1. mendeleev organized elements in his periodic table in order of increasing
2. you are given...

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