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3 years ago

Which statement is NOT true about the elements flourine, chlorine, and iodine?

Chemistry

2 answers:

n200080 [17]3 years ago

7 0

<h2>Answer:</h2>

The fluorine, iodine, and chlorine are <u>c) They are similar to noble gases</u>.

<h2>Explanation:</h2>

Nobel gas refers to those substances which doesn't have any vacant shell. They are completely filled. They are electron haters and are really hard to make them involve in chemical reaction. On the other hand, gases such as chlorine, bromine and iodine are called as halogens. They have ability to accommodate one electron in their valence shell as they have 7 already.

Thus, it can be inferred that gases such as chlorine, bromine and iodine are not similar to Nobel gas and thus the statement C which states they are similar to Nobel gas is considered as false.

erica [24]3 years ago

6 0

They are all nonmetals

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What is the osmotic pressure of a 100 ml of toluene solution that contains a total of 0.005 moles of a polymer dissolved in it a

allsm [11]

Osmotic pressure is the pressure that would have to be applied to a pure solvent to prevent it from passing into a given solution by osmosis.

That can be mathematical computed from the expression:

Osmotic pressure=C×R×T

Where,

C= Concentration

R=Gas constant

T=Temperature

Concentration=Number of moles of solute/Volume(L)

=0.005*1000/100

=0.05

R= 0.08206 atm L/mol K

T=25+273

=298

Osmotic pressure= 0.05×0.08206×298

=1.2 atm

4 0

3 years ago

He heat of solution of kcl is 17. 2 kj/mol and the lattice energy of kcl(s) is 701. 2 kj/mol. calculate the total heat of hydrat

Alexandra [31]

The total heat of hydration of 1. 00 mol of gas phase $K^{+}$ ions and $Cl^{-}$ ions is - 684 kJ/mol.

Calculation ,

Given data ,

Heat of solution = 17. 2 kJ/mol

lattice energy of KCl(s) = 701. 2 kJ/mol.

heat of hydration = ?

The KCl is formed by $K^{+}$ ions and $Cl^{-}$ – ions

Δ $H_{solution}$ = U° + Δ $H_{hydration}$

Δ $H_{hydration}$ = Δ $H_{solution}$ - U° = 17. 2 kJ/mol - 701. 2 kJ/mol = - 684 kJ/mol

Hence, heat of hydration of 1. 00 mol of gas phase $K^{+}$ ions and $Cl^{-}$ ions is - 684 kJ/mol.

To learn more about hydration

brainly.com/question/15724859

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7 0

2 years ago

Even though the para position is one carbon farther from the carboxy group than the meta position, p-cyanobenzoic acid is more a

Nuetrik [128]

Answer:

Dissociation of O-H bond is highly favorable in p-cyanobenzoic acid resulting to higher acidity as compared to m-cyanobenzoic acid.

Explanation:

In p-cyanobenzoic acid, adjacent carbon to carboxyl group (-COOH) gets a partial positive charge due to electron withdrawing resonating effect of carboxyl group as compared to m-cyanobenzoic acid.

Due to this partial positive charge on carbon atom in p-cyanobenzoic acid, O-H bond in -COOH group remains highly polarized towards oxygen atom. Hence, dissociation of O-H bond is highly favorable in p-cyanobenzoic acid resulting to higher acidity as compared to m-cyanobenzoic acid.

Resonance structures are given below.

6 0

3 years ago

How do you find electronegativity

Anastaziya [24]

Answer:

To calculate electronegativy, find the electronegative values of each element involved in the bond. Once you know those values, subtract the higher from the lower to determine the electronegative difference.

Explanation:

Obtain an electronegativity value chart

Every element on the periodic table has a set electronegativity; these charts are easily obtainable through the Internet or a general chemistry textbook. Electronegativity is the ability of an element to attract electrons towards itself.

Determine the electronegativity of the individual elements in the bond

Using the table obtained in step one, find the electronegative value of each element. On the periodic table, electronegativity increases from left to right along a period and decreases as you go down a group.

Determine the electronegative difference between the two elements

Subtract the smaller electronegative value obtained from the larger electronegative value. This positive value is the electronegative difference for the bond. A larger electronegative difference represents a polar bond in which the sharing of electrons is unequal.

Use the electronegative difference to determine the type of bond

The closer the electronegative difference is to zero, the less polar a bond is. An electronegative difference of zero represents a nonpolar bond. A value between zero and two represents a polar covalent bond. A value greater than two represents an ionic bond. Fluorine is the most electronegative element, with an electronegativity of 4.0.

4 0

4 years ago

Read 2 more answers

If an object is thrown 60 m into the air and it takes the object 6 s to get there, what's the average speed of the object?

tigry1 [53]

Answer : The average speed of the object is, 10 m/s

Solution : Given,

Distance traveled by the object = 60 m

Time taken = 6 s

Average speed : It is defined as the distance traveled by an object in per unit time. The unit of average speed is, meter/second.

Formula used :

$\text{Average speed}=\frac{\text{Distance traveled}}{\text{Time taken}}$