C₂H60 Which is the correct empirical formula

Which of the following substances would you predict to have the highest DHvap? Group of answer choices CH3CH2CH2CH3 CH3CH2OH HF

Katyanochek1 [597]

Answer:

a) $CH_3CH_2CH_2CH_3$

Explanation:

In this question we have the following answer choices:

a) $CH_3CH_2CH_2CH_3$

b) $CH_3CH_2OH$

c) $HF$

d) $CH_3Cl$

e) $HOCH_2CH_2OH$

We have to remember the relationship between intermolecular forces and vapor pressure. If we have stronger intermolecular forces we will have less vapor pressure because the molecules have more interactions between them, so, the molecules will prefer to stay in a liquid state rather than a gaseous state. Now, we have to check each molecule:

a) $CH_3CH_2CH_2CH_3$ (Van der waals interactions)

b) $CH_3CH_2OH$ (Hydrogen bonding)

c) $HF$ (Hydrogen bonding)

d) $CH_3Cl$ (Dipole-dipole interaction)

e) $HOCH_2CH_2OH$ (Hydrogen bonding)

For molecules b, c and e we have hydrogen bond to a heteroatom (O, N, S, or P). In this case oxygen, therefore we will have hydrogen bonding interactions (a very strong interaction). So, we can discard these ones.

In molecule e, we have "Cl" bond to a "C" therefore we will have the presence of a dipole (due to the electronegativity difference). If we have a dipole, we will have a dipole-dipole interaction (a strong interaction, less than hydrogen bonding but still is a strong interaction).

In molecule a, we have only Van der Waals interactions because in this molecule we have only carbon and hydrogen atoms bonded by single bonds. So, we will have a non-polar molecule. These interactions are the weakest interactions of all the molecules given. So, if we have weaker interactions the molecules can be converted to a gas state more easily and we have more vapor pressure. 

7 0

3 years ago

Compounds which are characterized as covalent are generally made up of elements found in which part of the periodic table

uranmaximum [27]

Elements that make up the compounds that are characterized as covalent are mostly in the right part of the periodic table.

Alkalyne metals and alkalyne earth metals, which are located in the left part of the table, and given that those elements form ions with relative ease they make up ioinic compounds.

Covalent compounds are made up mainly of a non metal element and a metal elements with low metallic properties.

The metallic character of the elements decrease as you go to the right of the periodic table, that is why you found those elements in the right part of the periodic talbe.

7 0

4 years ago

Ethanoic acid and 1-butanol can react to produce water and a compound classified as an 1) aldehyde 2) amine 3) ester 4) halide

kvv77 [185]

Answer:

3) ester

Explanation:

Esterification is the process in which alkanol and alkanoic acids reacts in the presence of a catalyst and heat. The product is usually an ester(alkanoate) and water.

For the reaction between ethanoic acid and 1-butanol, the product is butylethanoate and water as shown below:

CH₃COOH + C₄H₈OH → CH₃COOC₄H₈ + H₂O

4 0

4 years ago

Ammonium carbonate decomposes upon heating according to the following balanced equation:

Ugo [173]

Answer : The total volume of gas produced are, 11.5 L

Explanation :

First we have to calculate the moles of ammonium carbonate.

$\text{Moles of }(NH_4)_2CO_3=\frac{\text{Mass of }(NH_4)_2CO_3}{\text{Molar mass of }(NH_4)_2CO_3}$

Molar mass of $(NH_4)_2CO_3$ = 96.094 g/mol

$\text{Moles of }(NH_4)_2CO_3=\frac{11.9g}{96.094g/mol}$

$\text{Moles of }(NH_4)_2CO_3=0.124mol$

Now we have to calculate the moles of total gas.

The given balanced chemical reaction is:

$(NH_4)_2CO_3(s)\rightarrow 2NH_3(g)+CO_2(g)+H_2O(g)$

From the balanced chemical reaction we conclude that,

As, 1 mole of $(NH_4)_2CO_3$ react to give 4 mole of gas

So, 0.124 mole of $(NH_4)_2CO_3$ react to give $0.124\times 4=0.496$ mole of gas

Now we have to calculate the volume of gas.

Using ideal gas equation:

$PV=nRT$

where,

P = Pressure of gas = 1.05 atm

V = Volume of gas = ?

n = number of moles = 0.496 mole

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of gas = $24.0^oC=273+24.0=297.0K$

Putting values in above equation, we get:

$1.05atm\times V=0.496mole\times (0.0821L.atm/mol.K)\times 297.0K$

$V=11.5L$

Thus, the total volume of gas produced are, 11.5 L

6 0

3 years ago

Select the name of the element with a condensed ground-state electron configuration of [kr] 5s14d7.

Vilka [71]

elements have equal number of protons and neutrons

the condensed format is when the closest noble gas with the closest electron configuration is given, this closest noble gas atomic number should be lesser than the atoms atomic number

atomic number of Kr is 36

1 electron in 5s subshell and 7 electrons in 4d subshell.

there's a total of 36 + 1 + 7 = 44 electrons

atomic number of the atom is 44

element with atomic number 44 is Ruthenium - Ru

answer is Ru

7 0

3 years ago

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