Pls help and make sure of your answer I have an exam tmrw and it will come

The order of increasing permeability through a lipid bilayer is; glucose > Cl− > tryptophan > indole > glycerol.

A lipid bilayer is a thin, flexible membrane made up of two layers of phospholipid molecules. Phospholipids are amphipathic molecules, meaning that they have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail.

Glucose (large and polar, cannot pass through the hydrophobic interior of the lipid bilayer)

Cl⁻ (charged and hydrophilic, cannot pass through the hydrophobic interior of the lipid bilayer)

Tryptophan (relatively large and polar, but has some ability to pass through the hydrophobic interior of the lipid bilayer due to its aromatic ring)

Indole (similar to tryptophan in structure and permeability)

Glycerol (small and uncharged, can easily pass through the hydrophobic interior of the lipid bilayer)

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If the charges of q1 and q2 are tripled, and the distance is doubled, the electrostatic force between them will change by a factor of 9. The electrostatic force is directly proportional to the product of the charges and inversely proportional to the square of the distance between them, as stated by Coulomb's Law.

According to Coulomb's Law, the electrostatic force (F) between two charges (q1 and q2) is given by the equation F = k * (q1 * q2) / r^2, where k is the electrostatic constant and r is the distance between the charges.

If we triple the charges of both q1 and q2, the new force (F') can be calculated as F' = k * (3q1 * 3q2) / r^2 = 9 * (k * (q1 * q2) / r^2) = 9F.

Additionally, if the distance is doubled (2r), the new force (F'') can be calculated as F'' = k * (3q1 * 3q2) / (2r)^2 = 9 * (k * (q1 * q2) / 4r^2) = (9/4)F.

Therefore, the electrostatic force will change by a factor of 9 when the charges are tripled and the distance is doubled.

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Answer:

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products

Explanation:

law of conservation of mass

The gases produced by running electricity through water are not the same particles as the gas produced when we heated the water. This is because gases have different densities.

Electrolysis is the process of passing an electric current through a solution or a molten form of a substance that is decomposed by the electric current passing through.

Electrolysis can be used to change the composition of a compound.

For example, the electrolysis of water results in the splitting of water molecules into their constituent elements with the formation of hydrogen gas and oxygen gas respectively.

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Demand-pull inflation occurs when: C. producers need more money to make and distribute goods.

Demand pull inflation occur when there is no balance in aggregate demand and aggregate supply and this tend to occur when the demand for goods and service is higher that the supply.

Demand pull inflation arise when people have the money to buy goods but the goods or product in the market is not sufficient leading to scarcity of goods due to large demand of that goods in the market.

Based on this demand pull inflation tend to rise  because producers or manufacture need more money to produce  and distribute goods so as to equate demand and supply.

Therefore we can conclude that the correct option is C.

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Answer:

18

Explanation:

You add the two numbers on the bottom left (8 and 32) and then subtract the number On the bottom middle right (22) from it (40-22=18) and then the answer to that gives you the answer of how much water is produced.

hope that helped :)

Answer:

Explanation:

Decomposition reaction, also known as analysis or dissociation, is a type of chemical reaction in which a compound breaks down into simpler substances or elements. In this reaction, a single reactant undergoes a chemical change and produces two or more products.

The decomposition reaction can be represented by the general equation:

AB → A + B

Where AB is the reactant, and A and B are the products. The reactant AB is usually a compound, and it breaks down into its constituent elements or simpler compounds.

There are different types of decomposition reactions, including:

Thermal decomposition: It occurs when a compound is heated, resulting in its decomposition into simpler substances. For example, the thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2):

CaCO3 → CaO + CO2

Electrolytic decomposition: It takes place when an electric current is passed through an electrolyte, causing it to break down into its component ions. For instance, the electrolysis of water (H2O) leads to the decomposition into hydrogen gas (H2) and oxygen gas (O2):

2H2O → 2H2 + O2

Photochemical decomposition: It occurs when a compound undergoes decomposition due to exposure to light energy. Chlorine gas (Cl2) can decompose into chlorine atoms (Cl) under the influence of light:

Cl2 → 2Cl

These are just a few examples of decomposition reactions. They are important in various chemical processes and are used in industries, laboratory experiments, and natural phenomena. By understanding and controlling decomposition reactions, scientists can gain insights into the behavior of different compounds and develop practical applications in fields such as chemistry, materials science, and environmental science.

Answer:

Explanation:

reaction in which a compound breaks down into simpler substances or elements

Answer: 2.22 moles

Explanation:

Molar mass

The molar mass of water, or H2O, can be found by adding the molar mass of two hydrogen atoms and the molar mass of one oxygen atom, which comes out to be 18.0 g/mol.

To find the moles in 40.0 grams of water, we will set up a proportion.

\(\frac{18.0 g}{1 mol} =\frac{40.0g}{xmol} \\\)

Then, we just solve for x.

\(18=\frac{40}{x} \\x=\frac{40}{18} \\x=2.22 mol\)

40.0 g of water is 2.22 moles.

Answer:

propene and hydrogen is product

When propanol is heated with concentrated sulphuric acid at 443 K, dehydration takes place and prop-1-ene is formed. In this reaction concentrated sulphuric acid acts as a dehydrating agent.

I. A + HCl gives )-gives 2-chloropropane

II. A --> Combustion ( what product does it form. Write out the equation propene ozonide

III.A ---> Hydrogenation (what product does it form. Write out the equation )propanol

The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.

Your nervous system is your body's command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing and sexual development (puberty).

- BRAINLIEST answerer

Answer:

waves that move through matter only are called mechanical waves.

waves that move through space only are called electromagnetic waves.

Waves that move through matter only are called

(mechanical) waves.

Waves that move through space are called

(electromagnetic) waves.

Could I get a brainliest please?

1.6 x 10⁻¹⁰ M is the concentration of OH− ion of the solution has a pH of 4.20.

pH of any solution is define as the negative logarithm of the concentration of hydrogen ions i.e. pH = -log[H⁺].

Equation of pH will be written in the form of base 10 by removing the log as:

[H⁺] = \(10^{-pH}\)

Given value of pH is 4.20 and concentration of H⁺ ions will be calculated as:

[H⁺] = 10⁻⁴°²⁰

[H⁺] = 6.3 × 10⁻⁵

Now the relation between pH & pOH in term of base 10 is:

[H⁺][OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / [H⁺]

[OH⁻] = 10⁻¹⁴ / 6.3 × 10⁻⁵ = 1.6 x 10⁻¹⁰ M

Hence, option (E) is correct i.e. 1.6 x 10⁻¹⁰ M.

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If H₂ is removed from the reaction CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g) at equilibrium, the value of Keq for the reaction will remain unchanged.

Keq, or the equilibrium constant, is a ratio of the concentrations of products to reactants at equilibrium, with each concentration raised to the power of its stoichiometric coefficient. It represents the extent of the reaction at equilibrium.

When H₂ is removed from the reaction mixture, according to Le Chatelier's principle, the equilibrium will shift to counteract the change. In this case, the forward reaction will be favored to replenish the removed H₂. As a result, more H₂ will be produced until a new equilibrium is established.

However, the equilibrium constant Keq is determined solely by the stoichiometry of the balanced chemical equation and the temperature. Since the stoichiometry and the coefficients of the balanced equation remain unchanged, Keq will not be affected by the removal of H₂. The concentrations of the remaining species, CO, H₂O, and CO₂, may change, but the ratio of their concentrations at equilibrium will still be represented by the same Keq value.

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Formaldehyde is a substance made up of Carbon, Nitrogen, and Oxygen different types of atoms that are chemically combined in a fixed ratio of 1: 2:1. It is classified as an aldehyde.

This refers to a naturally occurring organic compound with the formula CH2O and structure H−CHO. It is also called methanal. The pure compound is a pungent, colorless gas such that it polymerizes spontaneously into paraformaldehyde. It can be stored as an aqueous solution that is formalin. This is also used to store animal specimens.

Formaldehyde is an organic compound. It contains a carbon atom present in its chemical formula. It is also classified as an aldehyde. Formaldehyde(RC=OH) contains a formyl group  and an R group, which is a group that contains carbon and/or hydrogen.

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The correct formula for chalcopyrite is CuFeS₂, will accurately reflects the composition of chalcopyrite, with one iron atom and two sulfur atoms associated with each copper atom. Option A is correct.

Chalcopyrite is a mineral and a common source of copper. Its chemical composition consists of copper (Cu), iron (Fe), and sulfur (S). According to the given information, for each copper atom, there is one iron atom and two sulfur atoms associated with it.

Therefore, the formula should reflect the presence of one copper atom, one iron atom, and two sulfur atoms. Among the options provided, the formula CuFeS₂ (option A) correctly represents the composition of chalcopyrite, indicating one copper atom (Cu), one iron atom (Fe), and two sulfur atoms (S).

Hence, A is the correct option.

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Answer:

sadr

Explanation:

Pls give brainlist

Answer:

P₂ = 113.49 kPa

Explanation:

Given that,

Initial pressure, P₁ = 101 kPa

Initial temperature, T₁ = 10.0°C = 283 K

Final temperature, T₂ = 45°C = 318 K

The relation between pressure and temperature is given by :

\(\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\)

Where

P₂ is the new pressure

So,

\(P_2=\dfrac{P_1T_2}{T_1}\\\\P_2=\dfrac{101 \times 318}{283 }\\\\P_2=113.49\ kPa\)

So, the new pressure is equal to 113.49 kPa.

The metal-ligand bond was defined by crystal field theory as an ionic bond that solely results from electrostatic interactions between the metal ions and ligands. Anions are viewed as point charges in the crystal field theory, whereas neutral molecules are viewed as dipoles.

We detect repulsion between d orbital electrons and ligand electrons in the instance of an octahedral coordination combination with six ligands encircling the metal atom/ion. As they point in the direction of the axes along the ligand, the dx²- dy²and dz² orbitals are more susceptible to this repulsion.

The metal-ligand bond was defined by crystal field theory as an ionic bond that solely results from electrostatic interactions between the metal ions and ligands.

The octahedral splitting diagrams are:

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Answer:

\(\huge\fbox{Answer ☘}\)

Yes,a plane mirror can form a real image. A plane mirror can form a real image only for a virtual object. These converging rays of incidents light after reflection intersect at a point to give a real image.

hope helpful~

Plane mirrors always produce virtual images, because they never focus light into a single converging point.

Hence it does not produce real object or image

As power of the plane mirror is zero, hence, it neither converges nor diverges the rays.

Answer:

answer this and ill answer that

Explanation:

during a heating or cooling process, how are changes in enthalpy and temperature related?​

Answer:

Here's what I get  

Explanation:

(i) Voltaic cell

A voltaic cell is a device that uses a chemical reaction to produce electrical energy.

(ii) Overall Cell Potential

The standard reduction potentials for the half-reactions are

                               ℰ°/V

Cu²⁺ + 2e⁻ ⇌ Cu    0.34

Zn²⁺ + 2e⁻ ⇌ Zn   -0.76

The half-reaction with the more positive potential is the reduction half-reaction. It is the reaction that occurs at the cathode.

The half-reaction with the more negative potential is the oxidation half-reaction. It is the  reaction that occurs at the anode.

We reverse that half-reaction and subtract the voltages to get the cell reaction.

                                                          ℰ°/V

Cathode:  Cu²⁺ + 2e⁻ ⇌ Cu              0.34

Anode:     Zn ⇌ Zn²⁺ + 2e⁻              -0.76

Cell:          Zn +  Cu²⁺ ⇌ Zn²⁺ + Cu    1.10

\(\mathcal{E}_{\text{cell}}^{\circ} = \mathcal{E}_{\text{cat}}^{\circ} - \mathcal{E}_{\text{an}}^{\circ} = \text{0.34 V} - \text{(-0.76 V)} = \text{0.34 V} + \text{0.76 V} = \textbf{1.10 V}\)

(iii) Diagram

The specific labels will depend on your textbook.

They are often as follows.

a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

The salt bridge enables ions to flow in the internal circuit and to maintain electrical neutrality in the two compartments.

It often consists of a saturated solution of KCl.

As Zn²⁺ ions form in the anode compartment, Cl⁻ ions move in to provide partners for them.

As Cu²⁺ ions are removed from the cathode compartment, K⁺ ions move in to replace them.

Answer:a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

Explanation:

The concentration of total suspended solids in the stream during the spring is 45.833 mg/l.

What is total suspended solids?

Total suspended solids, or TSS for short, are waterborne particles larger than 2 microns. On the other hand, every particle less than 2 microns is referred to be a completely dissolved solid (TDS). Algae and bacteria can also be categorized as total suspended solids (TSS), however inorganic materials make up the majority of TSS.

Sand, silt, and plankton are all examples of TSS because they are all floating or "suspended" in water. The organic particles released into the water when some water sources are polluted by dead plants or animals are typically suspended solids. While some silt will sink to the bottom of a body of water, other TSS may float to the top or hang suspended somewhere in the middle. TSS has an impact on water clarity, hence the more TSS is present in a water supply, the less clear it will be.

Given in the question,

flow rate of stream (Q1) = 100 cfs

concentration of suspended solids (S1) = mg/l

During spring time,

concentration of TSS (S2) = 250 mg/l

flow rate of stream (Q2) = 20 cfs

The concentration of a mixture is calculated by:

\(C = \frac{Q_1 S_1 + Q_2 S_2}{Q_1 + Q_2}\)

\(C = \frac{100 \times 5 + 20 \times 250}{100+20}\)

\(C = 45.833\) mg/l

Therefore, concentration is 45.833 mg/l

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Answer:

2C4H10 + 13O2 → 8CO2 + 10H2O

Hope this helps brainleist??

Explanation:

The given statement "A highly positively charged protein will bind a cation exchanger and elute off by changing the pH" is true because cation exchangers contain negatively charged functional groups that attract positively charged molecules, such as highly positively charged proteins.

By changing the pH, the net charge of the protein can be altered, causing it to become less positively charged and therefore elute off the cation exchanger.

Proteins with a high isoelectric point (pI) will have a higher positive charge at pH values below their pI, allowing them to bind to the negatively charged cation exchanger.

By increasing the pH, the protein's net charge will become more negative, causing it to elute off the column. This process is called ion exchange chromatography and is widely used for protein purification in biochemistry and biotechnology.

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The vertical columns may also be called "groups".

- It's density increases

- mass increases

- volume increases

Hope this helps!

Answer:

first one

Explanation:

The relative abundance of isotopes is the number of atoms of a particular isotope divide by the total number of atoms of all isotopes of that element, multiplied 100 percent.

The relative abundance of an isotope is the percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.

Also relative abundances refers to the relative proportions of the stable isotopes of each element. They are most often quoted as atom percentages

To calculate the percent abundance of each isotope in a sample of an element,  the number of atoms of a particular isotope is usually divide by the total number of atoms of all isotopes of that element and then multiply the result by 100 since it is expressed in percentage.

Mathematically, the formula for relative abundance is given as;

R.A = ( number of atoms of isotope / total number of atoms ) x 100%

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Answer:

+1

Explanation:

A Potassium atom is represented with the sign "K" in chemistry and have atomic number 19.

The charge of electrons causes a matter to experience a force and it can be positive or negative.

In Potassium atom, the electric charge is +1 to enter a stable electron configuration as there is only one valence electron in the outermost shell of potassium atom. As potassium atom will lose electron it will become positively charged.

Hence, the correct answer is "+1".

Answer:

c. 64 grams

Explanation:

What is the proper combining ratio (by mass) for carbon to oxygen in the reaction that forms carbon dioxide (CO 2)? From the data given in question 1, since 64 grams of oxygen reacts with 24 grams of carbon, the ratio must be 64 to 24, which is 2.7 parts oxygen to 1 part carbon.