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3 years ago

Which compound has the strongest hydrogen bonding between its molecules? 1. HBr 2. HF 3. HCl 4. HI

Chemistry

2 answers:

skelet666 [1.2K]3 years ago

4 0

The correct answer is HF

Levart [38]3 years ago

3 0

You can compare the strength of the hydrogen bonding by comparing the electronegativities of the other elements. All the four elements, Br, F, Cl and I belong to the same group in the periodic table: group 17 named halogens. Then the kind of bonding they form is similar: polar covalent. You must know the trend of the electronegativities in the periodic table. Electronegativity decrease when you down across a group. Then the electronegativity of F is the higher of the group (indeed, it is the highest of all the 118 elements) . The higher the electronegativity the stronger the attraction that the halogen attracts the electrons and the stronger the hydorgen bonding. Then, the conclusion is that HF has the strongest hydrogen bonding.

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viktelen [127]

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3 years ago

At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s

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Answer : The time taken for the reaction is, 28 s.

Explanation :

Expression for rate law for first order kinetics is given by :

$k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}$

where,

k = rate constant = 0.0632

t = time taken for the process = ?

$[A_o]$ = initial amount or concentration of the reactant = 1.28 M

$[A]$ = amount or concentration left time 't' = $1.28\times \frac{17}{100}=0.2176M$

Now put all the given values in above equation, we get:

$0.0632=\frac{2.303}{t}\log\frac{1.28}{0.2176}$

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8 0

3 years ago

When a metal is burned in a closed container, the mass of the container and its contents do not change.a. observation. b. law. c

Annette [7]

Answer: Option (b) is the correct answer.

Explanation:

According to the law of conservation of mass, mass of a substance can neither be created nor it can be destroyed but it can simply be transformed from one form to another.

Therefore, when a metal is burned in a closed container, the mass of the container and its contents do not change because they follows law of conservation of mass.

Thus, we can conclude that when a metal is burned in a closed container, the mass of the container and its contents do not change then it is a law.

7 0

3 years ago