What is the correct iupac name of CH3-CH2-CH2CHO ?

The positive Biuret test indicates the presence of Peptide bond in proteins.

How to do Biuret test for proteins?

Follow these simple steps if you want to know practically:

Step 1: Take a 3 clean and dry test tubes.

Step 2: Add 1/2 ml of test solution to one test tube, albumin for another, and distilled water to third test tube.

Step 3: Add 3-4 drops of Biuret reagent to each test tube.

Step 4: Shake wee and let it be for 4-5 minutes.

Step 5: Observe the colour changes.

Peptide bonds are (C - N ) bonds present in proteins. The Biuret reagent colour is Pale blue and when you test for protein, if the solution contain protein, when you add the Biuret reagent it will turns to Purple. If there is no protein then the colour remains same.

The Biuret reagent is made up of Hydrated copper sulfate, sodium hydroxide, and Rochelle salt (sodium-potassium tartrate).

Peptide bond is also referred to as Amide bonds, it is formed between the Nitrogen atom of one amino acid and the Carbonyl carbon of second amino acid.

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Answer: I think it's B.

Explanation:

The second ionization energy is always the highest ionization energy. Ionization energy is the energy required to remove an electron from an atom in its gaseous state. Hence the correct option is A.

The first ionization energy is the energy required to remove the first electron from an atom. The second ionization energy is the energy required to remove the second electron from an atom that has already lost one electron.

The first ionization energy is always lower than the second ionization energy because the first electron is easier to remove because it is not as strongly attracted to the nucleus.

Once one electron has been removed, the remaining electrons are more strongly attracted to the nucleus, making it more difficult to remove the second electron.

Therefore, option A) 2nd Ionization Energy is correct.

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Answer:

C.) [tex]K_a = \frac{[H^+][H_2PO_4^-]}{[H_3PO_4]}[/tex]

Explanation:

The general structure for a Ka expression is:

[tex]K_a = \frac{[H^+][A^-]}{[HA]}[/tex]

In this expression,

-----> Ka = equilibrium constant

-----> [A⁻] = base

-----> [HA] = acid

The products are in the numerator and the reactants are in the denominator. In this case, H₃PO₄ serves as an acid and H₂PO₄⁻ serves as a base.

As such, the equilibrium expression is:

[tex]K_a = \frac{[H^+][H_2PO_4^-]}{[H_3PO_4]}[/tex]

According to chemical equilibrium, the Ka for the given chemical equation is Ka=[H⁺][H₂PO₄⁻]/[H₃PO₄].

Chemical equilibrium is defined as the condition which arises during the course of a reversible chemical reaction with no net change in amount of reactants and products.A reversible chemical reaction is the one wherein the products as soon as they are formed react together to produce back the reactants.

At equilibrium, the two opposing reactions which take place take place at equal rates and there is no net change in amount of the substances which are involved in the chemical reaction.At equilibrium, the reaction is considered to be complete . Conditions which are required for equilibrium are given by quantitative formulation.

Factors which affect chemical equilibrium are change in concentration , change in pressure and temperature and presence of catalyst.

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Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid (option B).

Arrhenius acid is any substance that dissociates in an aqueous solution to form hydrogen ions (H+) or proton.

On the other hand, a Brønsted-Lowry acid is any substance that can donate a proton or hydrogen ion to another substance.

Hydrochloric acid (HCl) can be categorized as an Arrhenius acid and Brønsted-Lowry acid because it has the ability to donate H+ and increase the hydrogen ion concentration of an aqueous solution.

Also, Lewis cids are the chemical substances that are able to accept electron pairs.

Therefore, Hydrochloric acid would best be described as a Arrhenius acid, Lewis acid and Brønsted-Lowry acid.

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The equilibrium constant for this reaction at 350°C is D. 282.

A dynamic chemical system approaches chemical equilibrium constant when enough time has passed and its composition no longer exhibits any discernible propensity to change further. The equilibrium constant of a chemical reaction is the value of its reaction quotient in this condition. The equilibrium constant is independent of the initial analytical concentrations of the reactant and product species in the mixture for a specific set of reaction conditions. Understanding equilibrium constants is crucial for comprehending many chemical systems as well as biological processes like the transport of oxygen by hemoglobin in the blood and the maintenance of acid-base homeostasis in the human body. There are many different kinds of equilibrium constants, including stability constants, formation constants, binding constants, association constants, and dissociation constants.

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A mixture of 0.600 mol of bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C.

Br2(g) + I2(g) ↔ 2IBr(g)

When the mixture has come to equilibrium, the concentration of iodine monobromide is

1.190 M. What is the equilibrium constant for this reaction at 350°C? Show step-by step explanation.

A) 3.55 × 10^3

B) 1.24

C) 1.47

D) 282

E) 325

The statement that is a part of Kinetic Molecular Theory (KMT) is Molecules in a gas move rapidly. That is option B.

Kinetic Molecular Theory (KMT) is defined as the theory that describes the physical behaviour of gases.

The Kinetic Molecular Theory (KMT) include the following:

Therefore, the statement that is a part of Kinetic Molecular Theory (KMT) is Molecules in a gas move rapidly.

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Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.

Water boils quickly when the weather is hot and warm because hot weather has high temperature which leads to the quick evaporation of the water. In hot weather, the liquid water changes into vapor state very quickly as compared to cold temperature.

So we can conclude that Quick boiling of water can be related to the hot weather because in high temperature water changes from liquid state to gaseous state.

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If the bond energy between atoms is very high the the bond between the atoms is strong.

Chemical bonds are formed wen two atoms are combined together. The chemical bonds are responsible for holding the atoms together. These chemical bonds could be ionic or covalent in nature. Coordinate bonds have hybrid behavior between ionic and covalent bond types.

We know that the bond energy refers to the energy that must be supplied in order to break the bonds. A high bond energy implies that it takes a whole lot of energy to break the bond. If it takes a lot of energy to break the bond, then the bond must be a strong bond which holds the two atoms together in the compound. Hence, if the bond energy between atoms is very high the the bond between the atoms is strong.

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Answer:

No.

Explanation:

HI is more polar than HF

At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas.

In a state of pressure and temperature of a given triple point, all three phases (known to be the solid, liquid and gas state) are seen to often exist in equilibrium.

Note that the triple point is said to be one that stands for  the lowest pressure in which a liquid phase can live in equilibrium with that of the solid or vapor.

Hence, the statement of At the triple point on a phase diagram, the state(s) of matter exist is option C: Solid, Liquid and Gas is true.

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The reaction above is a spontaneous reaction

Cu^2+ + 2Br^- --> Cu + Br2

A spontaneous redox reaction is a special type of redox reaction which involves the release of energy where the electrons are transferred from from an anode to the cathode

General spontaneous redox reactions is found mostly in electrochemical cells

So therefore, the reaction above is a spontaneous reaction.

Cu^2+ + 2Br^- --> Cu + Br2

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Taking into account the reaction stoichiometry, 36 grams of water (option B) will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen.

In first place, the balanced reaction is:

2 H₂+ O₂  → 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

You can see that by reaction stoichiometry 4 grams of H₂ form 36 grams of H₂O.

In summary, 36 grams of water (option B) will be produced if you start with 4.0 grams of hydrogen and an excess of oxygen.

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Vinegar pH 3.2: Weak acid

Battery acid pH 0.5: Strong acid

Shampoo pH 7.0: Neutral

Ammonia pH 11.1 Strong base

The molar mass of the compound is = 1.42g/ mol

∆Tb = kB × molarity

∆Tb = 102.3°C

Kb = 0.510 °C/m

Molarity= electrolyte mass × water solubility/ Mw× mass of water.

That is,

102.3°C= 0.51× 83.5×1000/Mw × 291.7

Make Mw the subject of formula,

Therefore,

Mw = 0.51 × 83.5×1000/ 102.3 × 291.7

Mw= 42,585/29,840.91

Mw= 1.42g/mol

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Answer:

Number of neutrons is equal to 148.

The value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

Scientific notation is a way to write very large or very small numbers so that they are easier to read and work with.

You express a number as the product of a number greater than or equal to 1 but less than 10 and an integral power of 10 .

There are two reasons to use scientific notation.

Given,

= 6.0 x 10^3- 2.3 × 10^3

= (6.0 - 2.3) × 10^3

= 3.7 × 10^3

Thus, we find that the value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

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A. The wavelength of light that is emitted is 122 nm.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

When an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom, the wavelength of light is emitted is calculated as follows;

¹/λ = R(1/n₁²  -  1/n₂²)

¹/λ = 109677(1/1 - 1/2²)

¹/λ = 109677(1 - ¹/₄)

¹/λ = 82,257.25

λ = 1/8,225.25

λ = 1.22 x 10⁻⁵ cm

λ = 1.22 x 10⁻⁷ m

λ = 122  nm

Thus, the wavelength of light that is emitted is 122 nm.

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Hydrohalogenation Reaction:

The substitution of hydrogen and halide levels across a double bond takes place. The halide group is connected to the carbon with more substituents. The product will affect by the presence of peroxide

Ethene is a symmetrical alkene having two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon particles on either side of the double bond.

Ethene is a symmetrical alkene including two carbon atoms. It reacts with HBr in the presence of CCl4, producing bromoethane or ethyl bromide (CH3CH2Br). Propene is an unsaturated alkene consisting of a three-carbon chain with two carbon atoms on either flank of the double bond.

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Considering the combined law equation, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.

Boyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant.

This law says that volume is inversely proportional to pressure: if pressure increases, volume decreases, while if pressure decreases, volume increases.

Mathematically, Boyle's law states that the multiplication of pressure by volume is constant:

P×V= k

Charles's law establishes the relationship between the temperature and the volume of a gas when the pressure is constant.

This law says that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases, while if the temperature of the gas decreases, the volume decreases.

Mathematically, Charles' law states that the ratio of volume to temperature is constant:

[tex]\frac{V}{T}=k[/tex]

Gay-Lussac's law establishes the relationship between the temperature and pressure of a gas when the volume is constant.

This law says that the pressure of the gas is directly proportional to its temperature: if the temperature increases, the pressure increases, while if the temperature of the gas decreases, the pressure decreases.

Mathematically, Gay-Lussac's law states that the ratio of pressure to temperature is constant:

[tex]\frac{P}{T}=k[/tex]

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law:

[tex]\frac{PV}{T}=k[/tex]

Considering an initial state 1 and a final state 2, the following holds:

[tex]\frac{P1V1}{T1}=\frac{P2V2}{T2}[/tex]

In this case, you know:

Replacing in the combined law equation:

[tex]\frac{1.89 atmx10.9 mL}{294 K}=\frac{2.25 atmxV2}{298 K}[/tex]

Solving:

[tex]\frac{1.89 atmx10.9 mL}{294 K}\frac{298K}{2.25 atm} =V2[/tex]

9.28 mL= V2

Finally, you would have a volume of 9.28 mL at 25.0 C and 2.25 atm.

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The mass percentage of vitamin C is 68.3%and the mass percentage of sucralose is 31.7%.

Osmotic pressure (π) = iCRT

Where,

Π= Osmotic pressure = 3.06 atm

I = Van't hoff factor = 1(molecular solution)

C = concentration (in mol/L)

R = gas constant = 0.082 Latm/Kmol

T = temperature = 293K

C can also be written as

Number of moles/ Volume = n/V

Given, volume = 46.1 mL

It can be written as

Π= nRT/V

n= πV/RT

n = 3.06× 0.0461/(0.082×293)

n = 0.0058moles

Mass of vitamin C = a

Mass of sucralose = b

Mass of given sample = 1.239g

Hence,

a + b = 1.239

b = 1.239-a

Molar mass of vitamin C = 176g/mol

Molar mass of sucralose = 398g/mol

Total number of moles = number of moles of vitamin C + number of moles of sucralose

0.0058= a/176 + (1.239-a) /398

0.0058× 176× 398 = 398a + (1.239-a) 176

406.27 = 398a + 218.064 -176a

188.206 = 222a

a = 0.847g

And b = 0.392g

Mass percent of vitamin C = (0.847/1.239) × 100

= 68.3%

Mass percent of sucralose = 100- 78.5

= 31.7%

Thus, we find that the mass percentage of vitamin C is 68.3 %and the mass percentage of sucralose is 31.7%.

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Answer:

The correct answer is a hypothesis.

Answer:

See below

Explanation:

From the graph: initial temp = -10 ° C

    melting occurs at 0 ° C   (constant temp process)

     at '2'   the ice is melting.....going from a solid to a liquid at a constant temperature  

Answer:

8.73 L

Explanation:

First, you need to convert grams to moles using the molar mass.

Molar Mass (N₂): 2(14.009 g/mol)

Molar Mass (N₂): 28.018 g/mol

12.2 grams N₂               1 mole
----------------------  x  ------------------------  =  0.435 moles N₂
                                 28.018 grams

To find the volume, you need to use the Ideal Gas Law:

PV = nRT

In this equation,

-----> P = pressure (torr)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas constant (62.36 torr*L/mol*K)

-----> T = temperature (K)

After converting the temperature from Celsius to Kelvin, you can plug the given values into the equation.

P = 1132 torr                                   R = 62.36 torr*L/mol*K

V = ? L                                            T = 91 °C + 273.15 = 364.15 K

n = 0.435 moles

PV = nRT

(1132 torr)V = (0.435 moles)(62.36 torr*L/mol*K)(364.15 K)

(1132 torr)V = 9888.015

V = 8.73 L

Answer:

C. zero 0

Explanation:

single elements will always possess an oxication number of zero