Identify the choice that best completes the statement or answers the question El

Question

Identify the choice that best completes the statement or answers the question Electronegativity is a measure of the ability of an atom in a molecule to attract electrons to itself, the oxidation number of an atom in a molecule or polyatomic anion, the charge on a polyatomic cation, the charge on a polyatomic anion the ability of a substance to conduct electricity. What is the oxidation number of iodine in potassium iodate. KIO_3? +5 0 +3 -1 +7 Choose which central atom in the following molecules is most electronegative H_2O NH_3 PH_3 CH_4 H_2S Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 8 00 g NH, with 17.0 g O_2? 4 NH_3(g) + 5 O_2(g) rightarrow 4 NO(g) + 6 H_2O(g) 14.1 g 25.0 g 15.9 g 4.54 g 12.8 g Rank F, Cl, and Br in order of increasing first ionization energy. Br

Explanation / Answer

1.(a)

2. The general oxidation state of K(IA) group elements is +1

O is -2

We know that the sum of the oxidations atates of all the elements in a compound is equal to its charge.

Let x be the oxidation state of I

Then +1 + x + (3(-2)) = 0

x = +5

therefore option (a) is correct

3.The central atoms in the given compounds are respectively O, N , P , C & S

Among these O is more electronegative so option (a) is correct

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