The label on an old bottle of a solid reagent reads, "ferric chloride hexahydrate, fecl3 · 6h2o." an ap chem lab team is assigned to determine the purity of the bottle's contents. the students dissolve 1.000 g of the salt in a small amount of distilled water and then add an excess of 1.0 m silver nitrate, agno3, to precipitate all of the chloride ion as agcl. the balanced equation for the precipitation reaction is: fecl3(aq) + 3 agno3(aq) + 3agcl(s) + fe(no3)3(aq) if the ferric chloride is 90.0% pure, which of the following would correctly give the mass of silver chloride that is expected to form? note: all units have been omitted from the options, as have numerical values of 1, 1.0, 1.000, etc.

passed in september 1935, these laws are known as nuremberg laws.   they forbid jews from marrying but not directly forced them to divorce aryans. what is most noticeable is the fact that the jews were defranchised, meaning by this that they were not expected to have any civil rights, including the right to vote. the right answer is deprived of the right to vote.

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.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.