15.24. Calcium hydroxide, also known as slaked lime, is used in industrial processes in which low concentrations of base are required. Only 0.16 g of Ca(OH)2 dissolves in 100 mL of water at 25°C. What is the concentration of hydroxide ions in 250 mL of a solution containing the maximum amount of dissolved calcium hydroxide?​

The molecular weight of sulfuric acid can be calculated by adding the atomic weights of its constituent elements. Therefore, the correct answer is c. 98 u.

The molecular weight of sulfuric acid  can be calculated by adding the atomic weights of its constituent elements: hydrogen (H), sulfur (S), and oxygen (O). There are 2 hydrogen atoms (1 u each), 1 sulfur atom (32 u), and 4 oxygen atoms (16 u each). The calculation is as follows: (2 x 1) + 32 + (4 x 16) = 2 + 32 + 64 = 98 u. Therefore, the correct answer for the molecular weight of sulfuric acid is 98 u (option c).

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Answer:

fccdsetyujvreettyukknop

Answer:

the stomach and small intestine absorb the glucose and then release it into the bloodstream once in the bloodstream glucose can be used immediately for energy

Answer:

melting is the answer any questions I'm glad to help

When solid converts to gas then heat is required to break the intermolecular forces of attraction between the particles. In this process heat increase but temperature remains the same. Therefore, the correct option is option C.

Phase transition is a process in which transition takes place from one state to another of a medium on changing temperature or pressure. Phase transition is a physical process as there is no breaking of old bond and forming of new bonds takes place.

During phase transition temperature remain constant as the extra heat that is given to the system that goes into breaking of intermolecular forces of attraction between the particles. So overall temperature remains same but heat keeps on increasing. Among all the given option, expansion is the only process in which change of state does not take place.

Therefore, the correct option is option C.

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The incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

Hydrogen is usually +1

Oxidation numbers can be defined as that number which is assigned to an element in chemical reaction which represents the number of electrons lost or gained.

So therefore, the incorrect rule for assigning oxidation numbers is Hydrogen is usually –1.

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Answer:

B: Oxygen is usually –2.

Explanation:

Assuming the dielectric constant of butyl acetate and ethyl acetate is near equal, the intermolecular force which is primarily responsible for the higher equilibrium vapor pressure of ethyl acetate is Induced dipole-induced dipole.

An Induced dipole-induced dipole or Dipole-Induced Dipole Force is a type of force that is generated by a polar molecule in a non-polar atom or a non-polar molecule or between asymmetric molecules.

It is a weak attraction that is caused by the disturbance of electron arrangement when a polar species approaches a  non-polar species.

In general, these forces are known as London dispersion forces.

For example, these forces are present in Helium due to the uneven distribution of electrons.

Similarly, in the dielectric constant of butyl acetate and ethyl acetate is near equal, then Induced dipole-induced dipole will be responsible for higher equilibrium vapor pressure.

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Brainly is erroneously blocking my answer from being posted due to nonexistent profanity and/or links, so I have attached an image of my written response. Please let me know if you have any problems seeing it.

Answer:

This is incorrect because it will mean that one whole side of the earth doesn't have sun for an entire season.

Explanation:

We have sun and no sun every single day no matter what season it is.

Remove dry chemicals.Remove contaminated clothing or jewelry. Bandage the burn. Rinse again if needed.

the amount of harm to the skin relies upon on how strong the chemical was, how lots of it become at the skin, and how long it become there. Chemical burns, even minor ones, can be very painful. A minor burn may heal inside a few days. however a extra extreme burn might also take weeks or maybe months to heal completely.you need to now not use ice, or even ice-bloodless water, on a burn. extreme cold carried out to a burn can further damage the tissue. to properly cool and clean a burn, remove any apparel that covers it.

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False. Lipids are hydrophobic, which means they do not dissolve in water. This is because lipids are non-polar molecules and water is a polar solvent.

However, lipids can dissolve in other non-polar solvents such as oils and fats.
False. Lipids are actually hydrophobic, meaning they do not dissolve in water. Hydrophilic substances, on the other hand, do dissolve in water.

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Answer:

why matter exists

Explanation:

The kind of questions that chemistry CANNOT answer is "why matter exists".

In Chemistry, question of how the properties, composition and structure of substances are is answered. Also, the transformations that these substances undergo, and the energy that they release or absorbe during the transformation processes are revealed in chemistry.

Chemistry can answer the question of what forms of matter exists but cannot answer why matter actually exists.

The potential energy diagram for the reaction N02(0) -> JN2(9) + 02(9) should be a curve that descends from reactants to intermediates and then ascends to products, with a label indicating that ΔH = -33.1 kJ/mol.

A potential energy diagram of a reaction is a graph that demonstrates the progress of a reaction and the changes in potential energy that occur over time. The vertical axis of the diagram shows potential energy, and the horizontal axis shows reaction progress. Reactants are shown on the left, intermediates are shown in the middle, and products are shown on the right. The reaction pathway is depicted with a curve that descends from reactants to intermediates and then ascends to products. Labeling the enthalpy of a reaction involves identifying its enthalpy change. The enthalpy change (ΔH) of a reaction is the heat absorbed or given off by the system at a constant pressure. The reaction N02(0) -> JN2(9) + 02(9) has ΔH = -33.1 kJ/mol. The reaction is exothermic because the enthalpy change is negative.

The potential energy diagram for this reaction should be a curve that descends from reactants to intermediates and then ascends to products. The enthalpy change should be labelled in the diagram. If the enthalpy change is negative, then it should be labelled as a negative value. If the enthalpy change is positive, then it should be labelled as a positive value.

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Answer: I forgor

Explanation:

Explanation:

As you go farther from the nucleus, electrons at higher levels have more energy, and their energy increases by a fixed, discrete amount. Electrons can jump from a lower to the next higher energy level if they absorb this amount of energy.

False, Atoms are not charge-neutral and some have permanent dipole moments(1).False, Molecules are not always charge neutral and can have permanent dipole moments(2).

Both atoms and molecules have some charge because of the electrons.

The atoms themselves have no net charge, but the electrons are negatively charged. In other words, atoms are charge-neutral but their electrons are not.

Furthermore, atoms can have permanent dipole moments as well. For instance, a molecule of HCl has a permanent dipole moment because chlorine has a higher electronegativity than hydrogen, which means that the shared electron pair is drawn closer to the chlorine than to the hydrogen.Molecules can also have a charge imbalance or permanent dipole moment.

When the molecule has an uneven distribution of charge, it becomes polar. A permanent dipole moment exists when the electrons within a covalent bond are not equally shared between the atoms.

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Adding one proton to the nucleus of an atom D) converts it to an atom of a different element.

The addition of a single proton to the nucleus of an atom can have a significant effect, transforming it from one element to another.

This is because protons are positively charged and act as the defining factor in the atomic number of an element.

Every element has a unique number of protons, and when the number is changed, the element changes as well. Therefore, adding a single proton to the nucleus of an atom will convert it to an atom of a different element.

This is because protons are the subatomic particles that determine the identity of an element. When you add a proton to the nucleus, you are changing the element's identity and thus creating a new element.

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Answer:

5.83 M

Explanation:

3.5 M * 125.0 ml  =  M₂ * 75.0ml

437.5 M.ml = M₂ * 75.0 ml

M₂ = 437.5 M.ml / 75.0 ml

M₂ = 5.83 M

The solubilities of lead is different.

The lead compounds are more covalent in character, and also have a  considerable high bond strength  which means (aka lattice enthalpy).On the other hand lead compounds are insoluble, this energy is too high for hydration enthalpies (the energy released when water surrounds an ion of either charge).

Consider the position of Pb in the periodic table and the position of the Alkali Earth metals.

Alkali Earth Metals occupies noble-gas configuration when they are doubly charged cations.

Lead however is on the right hand side, and would like to have more electrons to get converted to get stable configuration; making the bonds in lead-compounds more covalent -as well as stronger- in nature.

The lattice enthalpies of insoluble compounds always have higher than the enthalpy of solvation.

Now, since Alkali Earth metals always like to be in ionic states; their compounds will dissolve in general more easily than the same compounds with lead, usually the lattice energy of lead compounds is much higher (In case of insoluble compounds higher than the energy that would be released upon solvation, which thus doesn't occur).

Thus, we can conclude with the fact of different solubilities.

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Answer:

VOLTIC CELL

Battery

Electrical to chemical

Endothermic

Electrolysis

Chemical to electrical

Anode

Anode to cathode

Battery

Endothermic

Negative

Enthomeric

Reduction

Oxidation

ELECTRYOTIC CELL

No

Non spontaneous

positive

negative

yes

Anode

Electrical to chemical

Anode to cathode

Exothermic

positive

oxidation

Electroplating

Chemical to electrical

The proton-proton chain require a high temperature because at high temperatures the protons have enough speed to overcome the electrical repulsion, option B.

The proton-proton chain, often known as the p-p chain, is one of two known sets of nuclear fusion events that stars use to convert hydrogen to helium. It prevails in stars with masses less than or equal to that of the Sun, but theoretical models predict that the CNO cycle, the second known reaction, would dominate in stars with masses more than around 1.3 times that of the Sun.

The "proton-proton chain reaction," despite its name, is not a chain reaction in the traditional sense. A chain reaction is defined in most nuclear processes as a reaction that creates a product, such as neutrons released during fission, that promptly stimulates another similar event. The proton-proton chain is a succession of processes, similar to a decay chain. The result of one reaction serves as the starting ingredient for the next.

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Complete question:

Why does the proton-proton chain require high temperatures?

The orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

To find the orbital period (P) of an asteroid with a given semi-major axis (a), we can use Kepler's third law:

a³ = P²

Given that the semi-major axis (a) is 73.4 AU, we can substitute this value into the equation and solve for the orbital period (P):

(73.4 AU)³ = P²

(73.4)³ AU³ = P²

P² = (73.4)³ AU³

Taking the square root of both sides:

P = sqrt((73.4)³) AU

Using a calculator to evaluate the expression, we find:

P ≈ 1652.0 AU

Therefore, the orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

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tube is red color and stopper that is used to collect specimens for serum analysis.

For determining plasma or whole blood, use a green top tube with lithium or sodium heparin. EDTA tubes are available with a royal blue top, a tan top, a pink top (used for blood bank testing), or a lavender top (used for trace metal whole blood or plasma determinations). For the majority of blood chemistries, a red-stopper tube is utilised to take a blood sample.EDTA tubes are used for analysing serum which is aquired after clotting which gives the permission to remove blood cell.

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The temperature of the room water and the block will be the same. The energy being transferred from the block to the water is heat energy.

The hot metal block is dropped into another beaker of water having room temperature after being placed in the boiling water. The flow of energy from the higher-temperature matter to the lower-temperature matter is called heat.

Now, the heat is transferred from the metal block to the water which is at room temperature. After some time, the metal block will have a low temperature and the water will have a high temperature.

This process will be carried down until both objects will have the same temperature. It is known as thermal equilibrium. The heat transfer from the hot water to the normal or cold water through a metal block is said to be conduction.

Therefore, the energy that is being transferred from the metal block to the water is heat energy.

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The microscopic as well as macro factors, such as pressure, volume, and temperature, influence the state of a thermodynamic equilibrium. The ideal gas solution is thus frequently phrased as follows:

What exactly is a dynamic equilibrium state?

The system is considered to be in a dynamic equilibrium state when the levels of the products and reactants do not change further as a result of the equal rates of forward and reverse processes. It is possible to plot a graph with time on the x-axis and concentration on the y-axis.

What distinguishes equilibrium from stability?

While equilibrium is referred to be the state of a body's balance, stability describes the condition of the remainder of the body. As long there isn't any external force or impact on a given body, it remains in that position when it is in the equilibrium state. There are three possible equilibrium states, and they are as follows:

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Answer:

6 Energy levels

Explanation:

First Energy Level: 2

Second Energy Level: 8

Third Energy Level: 18

Fourth Energy Level: 25

Fifth Energy Level: 8

Sixth Energy Level: 2

Hope this helps.

Answer:

\(x_{SO_3}=0.82\\\\x_{SO_2} =0.18\\\)

Explanation:

Hello there!

In this case, according to the given information, it is possible for us to solve this problem by using the Dalton's law which allows us to calculate the mole fractions by dividing the partial pressures over the total pressure. In such a way, we plug in the given pressures of sulfur trioxide (SO3) and sulfur dioxide (SO2) to obtain:

\(x_{SO_3}=\frac{1.45atm}{1.45atm+0.32atm} =0.82\\\\x_{SO_2}=\frac{0.32atm}{1.45atm+0.32atm} =0.18\\\)

Best regards!

An object possesses a density of 2.780 g/mL. and the mass of the object is 0.896 grams, the volume, in of the object in mL is  (A) 0.3223 mL

To calculate the volume of an object, we can use the formula:

Volume = Mass / Density

Given that the mass of the object is 0.896 grams and the density is 2.780 g/mL, we can substitute these values into the formula:

Volume = 0.896 g / 2.780 g/mL

By performing the division, we find:

Volume = 0.3223 mL

So, the volume of the object is 0.3223 mL.

Therefore, the correct answer is (A) 0.3223 mL.

It's important to note that the volume is expressed in milliliters (mL) since the density is given in grams per milliliter (g/mL). The calculation involves dividing the mass (in grams) by the density (in g/mL), resulting in the volume in milliliters.

Understanding and applying the formula for calculating volume using mass and density helps us determine the physical space occupied by an object based on its characteristics. Therefore, Option A is correct.

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