1) G to H.
2) I to J.
3) J to I.
4) I to H.

Answer:

3

Explanation:

At pH 3, the pentapeptide Ala-Glu-His-Val-Cys would contain two positively charged groups and one negatively charged group.

This is evident in that peptides have both carboxylic and amino groups.

Given that peptides have a certain amount of H⁺ and OH⁻ ions, it converts to zwitterions.

This conversion process is based on pKₐ and pKb of the acid and the base accordingly.

Therefore, they have two positively charged groups and one negatively charged grou

Answer:

A. 2H₂O₂  → 2H₂O + O₂

Explanation:

If we make a net sum of both reactions, we're left with:

Grouping species:

There is OI⁻ at both sides, so it is eliminated -same goes for the catalyst, I⁻-.

Thus the answer is option A.

Answer:

2.64gram

Explanation:

Molarity, which refers to the molar concentration, is calculated thus:

Molarity = number of moles (n) ÷ volume (L)

According to the question, volume = 100 mL, molarity = 0.240 M.

Since 1L = 1000mL

100 mL = 100/1000

= 0.1L

Hence;

0.240 = n/0.1

n = 0.1 × 0.240

n = 0.024mol

Mole = mass/molar mass

Molar mass of CaCl2 = 40 + 35.5(2)

= 40 + 71

= 111g/mol

mass = molar mass × mole

mass = 110 × 0.024

Mass = 2.64gram

Answer:

Explanation:

The balanced chemical reaction equation is;

2AgNO3(aq) + Cu(s) -> 2Ag(s) + Cu(NO3)2(aq)

When we balance chemical reaction equations, we ensure that the number of atoms of each element on the left hand side of the reaction equation is exactly the same number of atoms of each element on the right hand side of the reaction equation.

Let us consider this reaction;

There are two atoms of Ag on both sides of the reaction equation

There are six atoms of O on both sides of the reaction equation

There are 2 atoms of N on both sides of the reaction equation

There is one atom of Cu on both sides of the reaction equation.

Hence, the reaction equation is balanced.

Answer:

20 atm / (R . 321 K . i) = M

Explanation:

Osmotic pressure is a colligative property which is determined by the solute.

Solutes over solutions, can increase the osmotic pressure which is calculated like this:

P = M . R . T

where P is pressure, M is molarity, R the Universal Constant Gases and T, the absolute Temperature. We also have to consider the Van't Hoff factor, i, numbers of ions dissolved. Ionic salts determine more osmotic pressure than organic compounds, where i = 1. Then, the complete formula is:

π =  M . R . T . i

To determine molarity, osmotic pressure divide all the terms:

20 atm / (R . 321 K . i) = M

R = 0.082 L.atm/mol.K

If you see all the units in R, they will be cancelled, so finally the answer will be mol/L, which is molarity. The i term has no unit!.

Answer: The formula of the hydrate will be [tex]CuSO_4.7H_2O[/tex] and the name of the compound is copper sulphate heptahydrate.

Explanation:

Water of crystallisation is the number of water molecules that combine chemically in definite molecular proportion with the concerned salt in the crystalline state.

The formula of the hydrate will be [tex]CuSO_4.7H_2O[/tex] and the name of the compound is copper (II) sulphate heptahydrate as there are 7 molecules of water.

Answer:

i think niether

Explanation:

Which of the following sources could not be used to obtain the DNA of a person lost in a mass disaster?

food found in the victim's refrigerator could not be used to obtain the DNA of a person lost in a mass disaster.

So, correct answer is 2nd one.

Answer:

1: A b/c the table is showing that each different surface resulted in different time for acceleration.

2: D b/c the if the same force is applied to two different masses, the smaller masses would be impacted more and move faster. The larger an object is, then the greater the force you will need for it to move the same distance as the smaller masses.

Explanation:

The number of protons is equal to atomic number of an element.

So, Calcium has 20 protons.

Hope it helps :)

Answer:

it can tell and show what pathogen is in you as well what type and mutation so then your body can fight back and remember the genetic dna so then you will be immune in some way.

Explanation:

Question;

How does a fever aid an immune response?

Answer:

One type of immune cell jumps into the fray after body temperature rises, according to experiments in mice. A fever fights infection by helping immune cells to crawl along blood-vessel walls to attack invading microbes

Answer:

Formation. Main-sequence stars, including the sun, form from clouds of dust and gas drawn together by gravity. ... The core that is left behind will be a white dwarf, a husk of a star in which no hydrogen fusion occurs. Smaller stars, such as red dwarfs, don't make it to the red giant state.

Explanation:

Answer:

(A)explaining how Marx believed the goals of communism would fix the problems of capitalism.

Explanation:

In the section, "The Necessary Resources", after listing the four resources needed for an economic system to thrive, the author explained the practice of capitalism in the mid-1800s, where people owned private property and how Karl Marx and Friedrich Engels came up with the notion that capitalism did not allow for the fair distribution of resources.

In the section, "Karl Marx and Communism", further explanation was provided as to how Marx felt that capitalism caused a gap between the rich and the poor, how that system was unfair to poorly paid workers and how communism will soon replace capitalism.

Answer:

3–ethyl–2,2–dimethylhexane

Explanation:

To name the compound given in the question above, do the following:

1. Determine the parent name by determining the longest continuous carbon chain. In this case, the longest continuous carbon chain is 6. Hence, the parent name is Hexane.

2. Identify the substituent group attached to the compound. In this case, we have one ethly group (–CH₂CH₃) and two methyl groups (–CH₃)

3. Locate the position of the substituents by giving them the lowest possible count. In this case,

The two methyl groups (–CH₃) are located at carbon 2

The ethly group (–CH₂CH₃) is located at carbon 3.

4. Combine the above to obtain the name of the compound.

The name of the compound is:

3–ethyl–2,2–dimethylhexane

Answer: bar graph, circle graphs, line graphs

Explanation:

Answer:

A. Radar would be the best tool for measuring distances to objects in the solar system.

B. A parallax measurement would be best for this nearby star.

C. Cepheids or RR Lyraes would be useful for determining the distance to this cluster.

D. The method using the H-R diagram and getting a spectrum to determine the luminosity class of the star.

Explanation:

-It is the electrostatic attraction between oppositely charged particles..

-It is the sharing of electrons by overlapping orbitals.

-It involves the exchange of electrons from one atom to another.

- It involves the sharing of neutrons between two nuclei.

Answer:

a covalent bond is defined as bond formed due to sharing a electrons between the combining atoms.

Explanation:

definition.

Answer: Please find answer in explanation column

Explanation:

During radioactive decay, the __unstable ________ isotope decays into a _stable ___________ isotope that has a different ____proton _______________ number

Or

During radioactive decay, the _ unstable parent nuclide ________ isotope decays into a _stable daughter nuclide ___________ isotope that has a different ____proton _______________ number.

There are 3 types of radioactive decay;alpha, beta and gamma, Of which the above clearly explains the beta decay. In beta decay, the unstable isotope having excess neutrons  will undergo a beta decay emitting a beta particle.( ⁰₋₁e) causing the nucleus to loose a neutron but gain a proton.

Some heavy unstable isotopes which undergo radioactive (beta decay ) to become stable isotopes  are phosphorus-32, strontium-90, iodine-131

Using Strontium 90 as an example , we have

⁹⁰₃₈St ----->⁹⁰₃₉Y + ⁰₋₁e

Strontium an unstable isotope undergoes a beta radioactive decay to form Yttrium.

Answer:

Melting and Boiling Point Determination

The physical properties of a substance can be used to establish its purity. These properties include the melting point and boiling point. Different substances tend to have different melting and boiling points, and any pure substance will have a specific melting and boiling point.

Answer:

See explanation below

Explanation:

Ok, the first picture is your exercise. We have one type of reaction to form the 3-methyl-3-hexanol.

Now, according to the question, you want another form to get the 3-methyl-3-hexanol. In this case, the easiest way to do this, is using a ketone with the 6 carbons, and the grignard reagent to use should have the methyl group. Now, in which carbon should the carbonile group be? well, as the final product has the OH group in carbon 3, then the reaction is taking place there. So the reactants would be the hexan- 3 - one and the methyl magnesium bromide.

The second picture, you'll see the reactants and final product.

Hope this helps

Answer:

S0rRy i d0nT kn0w fRenCh

Answer:

Approximately 8.3 pounds.

Explanation:

Answer:

Answer:

En CNPT un mol de cualquier gas ocupa 22,4 litros

Entonces hay que multiplicar

2.5 x 22.4 litros y eso es igual a 56 litros de gas metano

PD: CO2 es dióxido de carbono, metano es CH4