Cells can regulate different processes in two ways. They can turn on and off the genes that make enzymes, or they can

A)

increase the activation energy of a reaction.

B)

increase the amount of energy needed to carry out the preferred process.

C)

regulate the enzymes that are already made.

D)

decrease the amount of energy needed to carry out the preferred process.

Answer:

15

Explanation:

Because the ratio of copper in the solution is 15

The main form of intermolecular attractions among water molecules is hydrogen bonding. This type of intermolecular force is relatively strong and plays a significant role in shaping the unique properties of water.

Among the given options, the main form of intermolecular attractions among water molecules is hydrogen bonding. Hydrogen bonding is a specific type of intermolecular force that occurs when a hydrogen atom covalently bonded to an electronegative atom (such as oxygen, nitrogen, or fluorine) interacts with another electronegative atom in a different molecule.

In the case of water (H2O), each water molecule consists of two hydrogen atoms covalently bonded to an oxygen atom. The oxygen atom in one water molecule is partially negatively charged due to its higher electronegativity, while the hydrogen atoms are partially positively charged. These partial charges create regions of positive and negative polarity within the water molecule.

When water molecules come into proximity, the partially positively charged hydrogen atom of one water molecule is attracted to the partially negatively charged oxygen atom of a neighboring water molecule. This attraction is known as a hydrogen bond. It is a relatively strong intermolecular force and contributes significantly to the unique properties of water.

Hydrogen bonding is responsible for several important characteristics of water, such as its high boiling point, surface tension, and ability to dissolve many substances. These properties are crucial for the role of water in biological systems and its importance as a universal solvent.

The main form of intermolecular attractions among water molecules is hydrogen bonding. Hydrogen bonding occurs between the partially positively charged hydrogen atom of one water molecule and the partially negatively charged oxygen atom of a neighboring water molecule.

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Answer:

Balance The Chemical Equation Cac2 H2o Ca Oh 2 C2h2 Balance the chemical equation CaC 2 + H 2 O → Ca (OH) 2 + C 2 H 2 Calcium carbide react with water to produce calcium hydroxide and acetylene.

Explanation:

CaC2 + H2O > Ca(OH)2 + CH4

Ca + 2 H2O → Ca(OH)2 + H2 - Balanced equation

A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia

Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.

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Answer:

its c.

Explanation:

look up what convection is.

Based on the graph and the information provided, it can be stated another solution took place as there is a change in the properties of the substance.

The word "transmittance" refers to the ratio or in this case the percentage of light that can pass through a substance of object. This concept implies that if the tranmittance is 100% is beceuse 100% of the light is passing through the sample and 0% is of the light is being absorbed by it. In the same way if the transmittance is 20% is because the solution has likely become more dense and 80% of the light is being absorbed.

Considering the transmittance is directly related to concentration and density if there is a big change in the transmittance such as this returning to 100% it is likely because there was a chemical reaction that changed the properties (density) or concentrion of the sample.

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Nothing changes; it stays the same.

What does it imply to claim that a reaction is being catalysed by an enzyme?

Enzymatic catalysis of a reaction involving two substrates. The two substrates are brought together in the correct direction and location to react with one another using the template provided by the enzyme.

How do enzymes decide what to eat for fuel?

Finding the peptide sequences that proteases cleave in vitro—or, more specifically, which amino acids span the cleavage site and are recognised by the enzyme's active site—is one method of identifying prospective protease substrates. The proteome is then searched for substrates using these sequences, much like partial licence plate numbers

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If the Earth were to increase in diameter but have no change in its internal composition or mass, its average density would decrease.

The Earth's density is defined as its mass divided by its volume. If the diameter of the Earth were to increase, its volume would increase as well, but its mass would remain constant. Since density is a measure of mass per unit volume, the average density of the Earth would decrease as its volume increased.

To put it another way, if the Earth were to increase in diameter, its surface area would increase faster than its volume. This means that there would be a greater amount of empty space inside the Earth relative to its mass, leading to a decrease in its average density.

Answer:

infrared energy

Explanation:

Answer:

It is not possible to accurately determine whether the system or the surroundings performs work in a chemical reaction without more information about the specific reaction and the conditions under which it occurs.

In general, the work done in a chemical reaction can be affected by several factors, including the pressure, volume, and temperature of the system, as well as the nature of the reactants and products. Some reactions may result in the system doing work on the surroundings, such as when gases expand and do work on their surroundings by pushing against a piston or other external object. Other reactions may result in the surroundings doing work on the system, such as when gases are compressed and their surroundings do work on them. Still other reactions may result in essentially no work being performed, such as when the reactants and products are in equilibrium or when the volume of the system remains constant.

Without more information about the specific reaction in question, it is not possible to accurately determine whether the system or the surroundings performs work.

The correct answer is the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

The given solution is a hypotonic solution as the solution's tonicity is lower than that of the tears. The tears contain 0.9% w/v of NaCl, which is isotonic with tears. So, to make the given solution isotonic, the amount of sodium chloride needs to be added.

The concentration of NaCl in tears is 0.9% w/v. Additional Information: We know that % w/v is the amount of solute present in grams per 100 ml of the solution. Therefore, 0.9% w/v means 0.9 grams of NaCl is present in 100 mL of tears.

To make 30 ml of isotonic solution, we can use the following formula: Equivalent weight of NaCl = 58.5/2 = 29.25 (as NaCl ionizes to give Na+ and Cl- ions)Moles of NaCl required to make 30 ml isotonic solution = 0.9 × 30 / 1000 = 0.027Moles of Na+ and Cl- ions present in 30 mL of isotonic solution = 2 × 0.027 = 0.054

A number of grams of NaCl needed to prepare 30 mL of isotonic solution is calculated as follows:0.054 g = (0.027 x 29.25 x X) / 1000Where X is the amount of NaCl required to make 30 mL isotonic solution. Solving this equation gives us: X = 1.85 g (approx). Therefore, the amount of sodium chloride needed to make this eye solution isotonic with tears is approximately 1.85 grams. Rounding it up to the nearest whole number gives us the answer as 2. Hence, the correct option is 22.

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the universe formed through the big bang explosion, all of the elements on Earth have been cooked for billions of years in stars and then released in the universe through super- nova explosions.

Answer:

28/23

Explanation:

28 : 23

this is written as ,

28/23

u can convert into simplest form but in this question u can't so leave it as it is.

Answer:

B

Explanation:

Answer: Element can be chemically combined into compound, therefore, a compound consist of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining Adams of their constituent elements by ionic bonds or by covalent bonds.

Explanation:

Answer: Density is 0.39g/ml and will float

Explanation:

Density is mass/volume : 1.95g/5.0ml = 0.39g/ml

This sample will float on water because a object with a density less than 1g/cm3 will float. 1 cubic centimeter equal 1 ml.

Bowen's reaction series was established by N. L. Bowen in 1915 to explain the order of crystalization of minerals in a cooling magma (or lava) which he discovered when studying minerals in a rock sample.

It assists geologists in identifying the sequence in which minerals are produced by cooling a molten rock.

Here are the early minerals that crystallize in Bowen's reaction series:

First, olivine, which is a magnesium iron silicate, crystallizes at the highest temperature. After that, pyroxene (augite) crystallizes, followed by amphiboles (hornblende), biotite mica, and muscovite mica. These minerals are all silicate minerals, meaning they contain oxygen and silicon as their main components.

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Answer:

multitide of uses (drinking, cleaning, cooking, transportation). Without water we would not survive. -Lead atoms bond together and they make up the lead that we use as a pencil. -Copper atoms, aluminum atoms, nickel atoms, etc., all make up metal which is used for a variety of things in everyday life.

Explanation:

The equilibrium constant for the reaction is 6.9.

Temperature at which the reaction is held, T = 50°C = 323 K

The Gibb's free energy of the reaction, ΔG₀ = 5.2 kJ/mol

When a thermodynamic system is in thermal equilibrium, or chemical equilibrium, it is said to be in thermodynamic equilibrium. The values of a system's intense parameters, such as pressure, temperature, etc., determines the local state of the system at thermodynamic equilibrium.

The expression for the Gibb's free energy is given by,

ΔG₀ = -RT lnK

lnK = -ΔG₀/RT

lnK = 5.2 x 10³/(8.314 x 323)

lnK = 5.2 x 10³/2685.4

lnK = 1.93

Therefore, the equilibrium constant of the reaction,

K = e⁻(1.93)

K = 6.9

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Answer:

cystic fibrosis

Explanation:

The cells that make mucus, perspiration, and digestive fluids are impacted by cystic fibrosis. These fluids start to thicken and cling together as a result. They then block off all of the tubes, ducts, and passages.

Answer:

Bromine fluoride

Explanation:

Hey there!!

The reason is they are noble gases, and already has 8 electrons due to which they donot tend to react with other gases. Elements reacts for having stable electronic configuration but the elements like Neon and Argon has already 8 electrons so, they don't form ions.

Hope it helps...

Answer: molecules get closer

Explanation:

Condensation is the process in which molecules of a gas slow down, come together, and form a liquid. When gas molecules transfer their energy to something cooler, they slow down and their attractions cause them to bond to become a liquid

hope this helps

pls mark me brainliest

Answer:

D. The molecules get closer together and move more slowly.

Answer:

Explanation:

V/t

Answer:8

in the respiratory system

a.

Explanation:

none of the above. is the answer

Answer:

its B

Explanation:i took the test

Answer:

I believe the answer is ; explains natural phenomena.

Explanation:

In an acid – base titration, the titration curve reflects the strengths of the corresponding acid and base.

If one reagent is a weak acid or base and the other is a strong acid or base, the titration curve is irregular, and the pH shifts less with small additions of titrant near the equivalence point

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Answer:

9.133×10^-6 m

Explanation:

A photon is the smallest discrete amount or quantum of electromagnetic radiation. It is the basic unit of all light. Photons are always in motion and, in a vacuum, travel at a constant speed to all observers of 3 x 10^8 m/s.

From the question, the following details were supplied;

Energy of the photon (E) = 4.61×10^−19 J

Speed of light (c) = 2.99×10^8 m/s

Plank's constant (h) = 6.626×10^−34 J⋅s

Wavelength of the photon (λ)= ??? The unknown

From

E=hc/λ

λ= hc/E

Substituting values

λ= 6.626×10^−34 × 2.99×10^8/ 4.61×10^−19

λ= 91.33×10^-7 m

λ= 9.133×10^-6 m

Answer:Is sugar water a mixture or a compound? Define mixtures and compounds, and explain how without tasting it, Nicole can test to make sure she is using the sugar water in the glaze. The sugar-water is a mixture because it is chemically bonded, not chemically combined. A mixture is something that has 2 substances or more. hope this helps

Explanation:

Monoprotic acids are compounds that can donate one hydrogen ion (H+) in an aqueous solution. This means that they contain one hydrogen atom that can dissociate from the rest of the molecule.

Examples of mono protic acids include acetic acid (CH3COOH) and hydrochloric acid (HCl). Both of these acids contain only one hydrogen atom that can be ionized in water.

it is important to note that the term "mono protic" refers to the number of hydrogens that can dissociate in a solution, not the total number of hydrogen atoms in the molecule. For example, sulfuric acid (H2SO4) contains two hydrogen atoms but is considered a diprotic acid because it can donate two hydrogen ions. Similarly, phosphoric acid (H3PO4) is a triprotic acid because it can donate three hydrogen ions.

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