What is the reaction between aspirin and hydrochloric acid

Answers

Answer 1

Answer: According to Bronsted-Lowry reaction- an acid is any substance that donates a proton (H+ ion) to another substance hence these two substance are acid aspirin (acetylsalicyclic acid) and hydrochloric acid (HCl). And there are two pairs - an acid with a corresponding conjugate base and a base with a corresponding conjugate acid. These pairs are called conjugate acid-base pairs.

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Bond energy is related to bond length. Use the bond energy data below to arrange the bonds listed in order of increasing bond length (shortest to longest).Bond : Energy (kJ/mol)- C-C : 346
- C=C : 835
- C≡C : 612

Answers

Answer:

The order of increasing bond lenght :

-C≡C < -C=C < -C-C

Explanation:

Bond length is defined as average distance between two nuclei of bonded atoms in a molecule.Bond length is inversely proportional to the number of bonds present between two atoms.

$\text{Bond length} \propto \frac{1}{\text{Number of bonds}}$ ...[1]

Bond energy is defied as amount of energy required to break apart the bond of 1 mole of molecule into their individual atom.

Bond energy is directly proportional to the number of bonds present between two atoms.

$\text{Bond Energy} \propto \text{Number of bonds}$ ..[2]

From [1] and [2]:

$\text{Bond length} \propto \frac{1}{\text{Bond energy}}$

Bond : Energy (kJ/mol)

-C-C : 346

-C=C : 612

-C≡C : 835

The order of decreasing bond energy :

835 kJ/mol > 612 kJ/mol > 346 kJ/mol

The order of increasing bond lenght :

-C≡C < -C=C < -C-C

What is the mass (in grams) of 4.35 x 10^6 atoms of 12^C atom?

Answers

The mass of 4.35 ×10⁶ atoms of carbon-12 atom is 8.668×10 $^-17$ g.

What is a mole ?

A mole is a standard specific unit prescribed for measuring large quantities of entities which are very small such as atoms, molecules.It represents large number of units that is 6.022×10²³.

It was previously defined as the number which were experimentally determined to be found in 12 grams of carbon-12.Number of atoms in a mole is same for all substances.

Concept of mole provides quantitative information as to what happens in chemical reaction at a macroscopic level.It is used for determination of simplest formula of a compound.

For all practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons.

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$mass = moles * Relative formula massmass = 4.35*10^6/6* 10^23 * 12mass = 8.66... * 10^-17 g$

A reaction that occurs when the reactants are simply put together isA. automatic.
B. exothermic.
C. spontaneous.
D. endothermic.

Answers

The answer is C. spontaneous. Spontaneous reactions occur without being driven by an outside force.
Hope that helped you.

C. spontaneous would be ur answer!

Hope I helped:P

Highlight the basic points in Lewis and Langmuir theory of electrovalency

Answers

The correct answer for the question that is being presented above is this one: "Electrovalency is characterized with the transferring of one or more electrons from one atom to another together with the formation of ions and as well as the number of positive and negative charges.

The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.

Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas

The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.

Arrange the following elements in order of increasing atomic radius : Rb , K , Na , Li

Answers

Generally, atomic radii have this property on the periodic table: as you go down or left, the radius of an atom gets larger.

With this logic, let's apply this to the problem above. Li is on the highest part of the table compared to the other elements. Below it is Na, then K, then Rb. From our rule, we know that as we go down on the table, the atomic radius gets larger.

Thus, Li has the smallest radius, and Rb has the largest radius.

FINAL ANSWER: Li, Na, K, Rb

Final answer:

The order of increasing atomic radius for the elements Li, Na, K, and Rb is Li

Explanation:

The arrangement of the following elements in increasing atomic radius: Li, Na, K, and Rb indicates that the atomic radius increases as we move down a group in the periodic table. This group of elements, Li, Na, K, and Rb, are all alkali metals and exhibit similar chemical behaviors. As the atomic number or Z increases, the atomic radius also increases. For example, Lithium (Li) has an atomic number of 3, Sodium (Na) 11, Potassium (K) 19, and Rubidium (Rb) 37. As we move down the group from Li to Rb, both Z and the atomic radius increase.

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Which formula represents a polar molecule?
(1) Br2 (3) CH4
(2) CO2 (4) NH3

Answers

$\boxed{\left( 4 \right){\text{ N}}{{\text{H}}_{\text{3}}}}$ represents a polar molecule.

Further Explanation:

The attraction between atoms, molecules or ions responsible for the formation of chemical compounds is a chemical bond. It is formed either due to electrostatic forces or by the sharing of electrons.

The bond that results from the complete transference of electrons between metals and non-metals is an ionic bond. Metals, being electropositive in nature, have the tendency to lose electrons whereas non-metals tend to gain electrons due to their high electronegativity. Cations are formed by metal atoms while non-metals form anions with the gain of electrons.

The bond formed by mutual sharing of electrons between bonded atoms is a covalent bond. Such bonds usually exist between two or more non-metals.

The polarity of a bond depends on the electronegativity difference between the bonded atoms. The more electronegative atom will attract electrons more towards itself, thereby developing negative charge on itself and leaving the less electronegative atom with positive charge. Symmetry also plays an important role to determine whether a molecule will be polar or not. If symmetry is present in a molecule it will be non-polar, even there is an electronegativity difference between the bonded atoms.

(1) ${\text{B}}{{\text{r}}_{\text{2}}}$

This is formed by the combination of two Br atoms so there is no electronegativity difference between the bonded atoms and therefore this molecule is non-polar in nature (For structure, refer to the attached image).

(2) ${\text{C}}{{\text{O}}_{\text{2}}}$

This molecule is composed of one carbon and two oxygen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{O}}_{\text{2}}}$ is non-polar in nature (For structure, refer to the attached image).

(3) ${\text{C}}{{\text{H}}_{\text{4}}}$

This molecule consists of one carbon and four hydrogen atoms but is symmetrical in nature so dipole moment gets cancelled out and therefore ${\text{C}}{{\text{H}}_{\text{4}}}$ is non-polar in nature (For structure, refer to the attached image).

(4)

${\text{N}}{{\text{H}}_{\text{3}}}$

This molecule is composed of one nitrogen and three hydrogen atoms. But N is more electronegative than H so this is polar molecular due to electronegativity difference. Also, this is unsymmetrical molecule (For structure, refer to the attached image) and therefore it is polar in nature.

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
Which is a covalent compound? brainly.com/question/2083444

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: polar, non-polar, CH4, CO2, Br2, NH3, symmetrical, dipole moment, chemical bond, ionic bond, covalent bond.

4)NH3

NH3 is an asymmetrical molecule with a pyramidal shape.

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