Can someone help me ?

Chemistry

1 answer:

sweet-ann [11.9K]3 years ago

3 0

Explanation:

11. The correct option is B. The range for polar covalent bond is; 0.3 - 1.4

12. C. This is because there is uneven distribution of the charge. Unlike in the other options which are molecules of the same atoms with equal electronegativity.

13. A. Resonance structures is the correct option. It describes electrons in certain molecules or polyatomic ions where the bonding cannot be expressed by a single Lewis formula.

14. A. Lower electronegativity values means the electrons are more likely to be shared than transferred (gain/lost).

15. D. H2O is more polar than H2S because of the electronegativity of oxygen. H2O also has hydrogen bonds.

16. C. Due to the geometry of the other molecules, the polarity are cancelled.So they have a net polarity of zero.

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HBrO (aq) + H2O (l) ⇋ H3O+ (aq) + BrO- (aq)

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6.24 x 10-3 M

Explanation:

Hello,

In this case, for the given dissociation, we have the following equilibrium expression in terms of the law of mass action:

$Ka=\frac{[H_3O^+][BrO^-]}{[HBrO]}$

Of course, water is excluded as it is liquid and the concentration of aqueous species should be considered only. In such a way, in terms of the change $x$ , we rewrite the expression considering an ICE table and the initial concentration of HBrO that is 0.749 M: