Why do night bird have extraordinary night vision

Answer:

Compounds

Explanation:

All compounds of a substance shares chemical bonds between them and their structures.

The bonds can come in different forms. Compound are held by chemical bonds within their atoms.

Answer:

Explanation:

South Africa, the USA (Nevada, Alaska), Russia, Australia and Canada.

Answer:

20.00

Explanation:

Answer:

A. avoid talking to Anna altogether and stay out of her way

B. ask her manager for advice

C. check with Gary to see if there is any gossip about what's going on with Anna

D. take a curt approach of her own to show Anna how it feels

Explanation:

ANSWER: B.

The pH at the equivalence point for the titration of 25 mL of 0.5 M HI with 0.1 M KOH is approximately 7.

In this titration, HI is a strong acid, and KOH is a strong base. At the equivalence point, the moles of acid are equal to the moles of base, resulting in the formation of water and a salt. The salt formed in this reaction is KI. KI is a neutral salt, so the pH at the equivalence point is approximately 7, which is neutral.

Since the salt formed at the equivalence point is neutral, the pH is 7. Therefore, no indicator is required for this titration.

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Heating a solution containing an enzyme usually decreases the enzyme's activity. The reason for this might be: heating the solution will denature the enzyme. The correct option is D.

This may be due to the fact that: heating increases the enzyme's temperature, which may have a variety of effects on the reaction. Enzyme reactions are catalyzed by proteins, which are sensitive to temperature changes. Temperature can cause the enzyme to denature, which causes a structural change in the protein, resulting in a loss of function.

The enzyme's substrate ability to bind will decline as the temperature rises. As a result, raising the temperature of the reaction will reduce the amount of available free energy due to the increased entropy of the reaction. The elevated temperature may also raise the activation energy of the catalyzed reaction.

Enzyme activity is influenced by the temperature and pH of the environment in which they are located. It is important to keep the enzymes at the appropriate temperature and pH level to avoid denaturation and maintain enzyme activity. Enzyme function can be adversely affected by environmental factors such as temperature, pH, and salt concentration.

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Complete Question:

It is usually the case that heating a solution containing an enzyme markedly decreases the enzyme's activity. What might be the reason for this?

a. The ability of a substrate to bind to its enzyme will decrease as temperature increases.

b. Increasing the temperature of a reaction will decrease the available free energy due to the increased entropy of the reaction.

c. The elevated temperature will increase the activation energy of the catalyzed reaction.

d. Heating the solution will denature the enzyme.

Answer: The molarity of the K2CO3 solution is 0.625 M.

Explanation: To find the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters. Here's how to solve the problem:

Calculate the moles of K2CO3 using its given mass and molar mass:

moles = mass / molar mass = 93.1 g / 136.21 g/mol = 0.682 mol

Calculate the volume of the solution in liters:

volume = 1.09 L

Calculate the molarity of the solution using the moles and volume:

molarity = moles / volume = 0.682 mol / 1.09 L = 0.625 M

Answer:

The cell theory claims these three components:

1. cell is the smallest functional unit of life: It can be observed under the microscope that cells have various type of molecules and organelles present and have adifferent functional role in the cell which explains that the cell is the smallest unit of life as its molecules or organelles can not carry the life process on their own.

2. All organisms are made up of cells: From bacteria and archaea to human and other life forms are made up of a single cell or organization of cells in a specific pattern it also can be observed by the microscopic of blood or other tissue or cell of an organism.

3. Arise from pre-existing cell: The cells are can be studied under a microscope during cell division where we can observe that new cells come from the pre existing cell by the cell division.

The answer is true. Industrial environments use special systems to eliminate noxious or toxic fumes.

What is meant by toxic fumes?

Hazardous air pollutants from sources like solvents, asbestos-containing building materials, and cigarette smoke can also be found in indoor air. The most well-known hazardous gases include phosgene, chlorine, nitrogen dioxide, and carbon monoxide. Emissions from coal-fired power plants and industrial gas refineries are the main sources of harmful air pollutants outside.

The absorption method is used to reduce gaseous pollution in industrial environments. These toxins come into touch with a liquid, like water. The liquid then absorbs the toxic fumes. The most popular equipment for reducing toxic fumes emissions includes cyclones, electrostatic precipitators, fabric filters, and wet scrubbers.

Therefore, toxic fumes are eliminated by industrial environments using special systems.

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Answer:

hiii

Explanation:

Answer:

The molar mass of the gas should be 43.0 g/mol.

Explanation:

1.Use the ideal gas law(\(PV=nRT\)) & the formula for moles and molar mass(\(n=m/M\)).

2.Insert the equation \(n=m/M\) into \(PV=nRT\) and re-arrange to solve for M(molar mass). \(M = mRT/PV\)

3.Insert values and use the gas constant R = \(0.082 (L * atm)/(K * mol)\) since the volume is in liters and the pressure is in atmosphere units.

\(M = mRT/PV = \frac{(1.98g)(0.082 L*atm/(K*mol))(305 K)}{(0.960 atm)(1.20 L)}\)

4. Your answer should be 42.99 g/mol or 43.0 g/mol.

Have fun with chemistry!

Answer:

The reactivity order reflects both the strength of the C-X bond and the stability of X(-) as a leaving group and leads to the general conclusion that alkyl iodides are the most reactive members of this functional class

Molecules released during inflammation include cytokines, chemokines, prostaglandins, leukotrienes, histamine, and bradykinin.

Inflammation is a response of the immune system to injury or infection, aimed at removing the cause of the damage and initiating tissue repair. Inflammation is characterized by increased blood flow, increased permeability of blood vessels, and accumulation of immune cells at the site of injury or infection. Molecules released during inflammation play various roles in mediating the immune response.

Cytokines and chemokines, for example, are involved in recruiting immune cells to the site of inflammation, while prostaglandins and leukotrienes promote inflammation by increasing blood flow and causing pain. Histamine and bradykinin are involved in the initial stages of inflammation and contribute to the increased permeability of blood vessels.

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Answer:true

Explanation:

i did the same question a minute ago :>

The independent variable is plotted on the x-axis while the dependent variable is plotted on the y-axis.

The correct answer is D; the temperature of water

It is conventional in science experiments to plot the independent variable on the x-axis and the dependent variable on the y-axis.

As the temperature is manipulated, the measured the maximum mass of salt that can dissolve in 100 mL of water changes. This implies that mass of salt that can dissolve is the dependent variable while the temperature of water is the independent variable.

Hence, the temperature of water is plotted on the x-axis(independent variable) while  mass of salt that can dissolve is plotted on the y-axis(dependent variable).

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Answer:

the temperature of the water

Explanation:

Answer:

Earth

Explanation:

To calculate the alveolar ventilation rate, we need to use the formula:
Alveolar ventilation rate = (tidal volume - dead space) x respiratory rate
Using the values given in the question, we can plug in the numbers:
Alveolar ventilation rate = (500 ml - 200 ml) x 15/min
Alveolar ventilation rate = 300 ml x 15/min
Alveolar ventilation rate = 4500 ml/min
Therefore, the person's alveolar ventilation rate is 4500 ml/min.

The alveolar ventilation rate (AVR) can be calculated using the tidal volume (TV), dead space, and breathing rate. In this case, the tidal volume is 500 ml, the dead space is 200 ml, and the breathing rate is 15 breaths per minute.
AVR = (TV - dead space) x breathing rate
AVR = (500 ml - 200 ml) x 15 breaths/min
AVR = 300 ml x 15 breaths/min
AVR = 4500 ml/min

So, the person's alveolar ventilation rate is 4500 ml/min.

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The pH of an aqueous solution of 6.99×10⁻³ M hydrobromic acid is approximately 2.15.

The pH of an aqueous solution of 6.99×10-3 M hydrobromic acid is approximately 2.16. This is because hydrobromic acid is a strong acid, meaning that it dissociates completely in water to form H+ ions and Br- ions. The concentration of H+ ions in the solution can be calculated using the formula pH = -log[H+]. Therefore, pH = -log(6.99×10-3) = 2.16.
To determine the pH of an aqueous solution of 6.99×10⁻³ M hydrobromic acid, follow these steps:

1. Identify the formula: Hydrobromic acid (HBr) is a strong acid, meaning it ionizes completely in water, producing H⁺ and Br⁻ ions.

2. Calculate the concentration of H⁺ ions: Since HBr ionizes completely, the concentration of H⁺ ions is equal to the concentration of HBr, which is 6.99×10⁻³ M.

3. Use the pH formula: The pH of a solution is calculated using the formula pH = -log[H⁺], where [H⁺] is the concentration of H⁺ ions in the solution.

4. Calculate the pH: Plug in the concentration of H⁺ ions into the formula:
pH = -log(6.99×10⁻³)

5. Solve for pH: Using a calculator, you will find that the pH is approximately 2.15.

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Answer:

La respuesta correcta es: b. Calor sensible

Explanation:

Al absorber calor, un sistema puede: aumentar su temperatura o cambiar de fase (es decir, pasar de un estado de agregación a otro). Los cambios de fase se producen a temperatura constante, por lo que el calor involucrado se denomina calor latente. Por ejemplo, cuando el agua líquida pasa a vapor por calentamiento a la temperatura de ebullición, esta temperatura se mantiene constante hasta que toda la masa de agua pasa al estado vapor. En cambio, cuando el sistema absorbe calor cambiando su temperatura pero permaneciendo en el mismo estado de agregación (por ejemplo, cuando calentamos agua líquida por debajo de la temperatura de ebullición), el calor involucrado se denomina calor sensible.

A student measures the molar solubility of nickel(II) cyanide in a water solution to be 2. 00×10-8 M. The Ksp of nickel(II) cyanide is \(8 \times10^{-24}\)

The solubility product constant, Ksp, serves as the equilibrium constant for solids that dissolve in water. The level of solute dissolution in solution is what it stands for. The more soluble a material is, the higher its Ksp value.

The following equation may be used to get the solubility product constant (Ksp) for nickel(II) cyanide from the molar solubility:

\(Ni(CN)_2(s)\) ⇌ \(Ni_2+(aq) + 2CN^-(aq)\)

\(Ksp = [Ni_2^+][CN^-]^2\)

As per the given information,  

the molar solubility of nickel(II) cyanide is given as \(2.00\times 10^{-8}\)M, the concentrations of \(Ni_2^+\) and \(CN^-\) ions are also \(2.00 \times 10^{-8}\) M.

We have to find the Ksp of nickel(II) cyanide.

Hence, the Ksp can be calculated as:

Ksp = \((2.00\times10^{-8})(2.00\times10^{-8})^{2}\)

Ksp =\(8.00\times10^{-24}\)

Hence, the Ksp of nickel(II) cyanide is \(8.00\times10^{-24}\)

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Based on the balanced reaction equation, 9 moles of carbon dioxide are formed when 3 moles of propane are combusted.

From the balanced reaction equation we can see that 3 moles of carbon dioxide are formed upon the combustion of a single mol of propane:

C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O

These molar ratios are constant and enable us to set up a simple proportion:

1 mol of propane : 3 mol of carbon dioxide = 3 mol of propane : X

X = 3 mol of carbon dioxide * 3 mol of propane / 1 mol of propane

X = 9 mol of carbon dioxide

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Answer:

Atoms or molecules

Explanation:

Because if molecules are heated or colded the can be liquid or solid

According to the equilibrium law, this should move the AgCl equilibrium to the left (i.e., favor the reverse reaction) until the system finds equilibrium once more. This will increase the concentration of Cl-(aq) ions in the solution.

The following equilibrium is established by an AgCl solution that is saturated:

Ag+(aq) + Cl- =>AgCl(s) (aq)

NaCl will entirely separate into ions when added to the solution:

Na+(aq) + Cl=> NaCl(s) (aq)

According to the equilibrium law, this should move the AgCl equilibrium to the left (i.e., favor the reverse reaction) until the system finds equilibrium once more. This will increase the concentration of Cl-(aq) ions in the solution.

Because part of the Ag ions precipitated out, the [Ag+] in the new system will be lower than it was in the original saturated solution, while the [Cl-] ions will be higher (because you added more when you added NaCl). There will have been some precipitation of that excess Cl-, but not all of it. The result will be the same as the Ksp of AgCl if these new ion concentrations are entered into the Ksp equation.

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the question you are looking for is

What would happen to the Ag+ and Cl- concentrations if solid NaCl were dissolved in a saturated solution of AgCl in water?

Answer:

The first thing that you need to do here is to figure out the mass of the sample.

To do that, you can use its volume and the fact that aluminium is said to have a density of

2.702 g cm

−

3

, which implies that every

1 cm

3

of aluminium has a mass of

2.702 g

.

Explanation:

Electronegativity across a period: increases.

Electronegativity down a group: decreases.

Explanation:

Just did on Edge 2021

Electronegativity across a period increases and Electronegativity down a group decreases.

Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

On the periodic table, electronegativity generally increases as we move from left to right across a period and decreases as you move down a group.

As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Hence, Electronegativity across a period increases and Electronegativity down a group decreases.

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Molar mass of SmO or sodium methylate is 160g/mol

Now

Given mass

Do you go to Millbrook? 23.9kPa

Answer :By the time thermal equilibrium is attained in the system, ice is completely converted to water.

What is tehrmal equilibrium?

Thermal equilibrium is a situation in which two substances are exactly at the same temperature. That is. Heat is no longer flowing beween the bodies.

Recall that an insulated thermos flask implies that heat does not eneter or leave the system. Heat will flow from the water to the ice untill the both attains the same temperature and the ice is completely converted to water.

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