How much heat is absorbed when 15.0 g of liquid water is
heated until the temperature increases by 6.0°C? The specific
heat of liquid water is 4.18 J/gºC.

Answer:

sulfur is found in group 16 period 3

In diglyme, the β-deuterium isotope effect was observed to be temperature independent, indicating a nonlinear hydrogen transfer mechanism through a bent cyclic transition state. This means that the rate of the reaction is not influenced by changes in temperature.

The β-deuterium isotope effect refers to the difference in reaction rate between a reaction involving a hydrogen atom and one involving a deuterium atom at the β-position. In diglyme, the β-deuterium isotope effect remains constant across different temperatures.

The temperature independence suggests that the rate-determining step of the reaction involves a transition state with a bent cyclic geometry. This bent geometry is necessary for efficient hydrogen transfer to occur. It allows for optimal overlap of orbitals, facilitating the transfer of the hydrogen or deuterium atom.

The temperature independence of the β-deuterium isotope effect implies that the reaction kinetics are not influenced by changes in temperature. This behavior could be attributed to a high activation energy barrier, where the reaction proceeds through a highly organized transition state. This mechanism may be a result of strong intramolecular interactions or steric hindrance within the diglyme molecule.

Overall, the temperature independence of the β-deuterium isotope effect in diglyme suggests a nonlinear hydrogen transfer mechanism involving a bent cyclic transition state.

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Answer:

glucose, ATP

Explanation:

That is the answer, I took these classes in like 6th grade. :)

Answer:

13. A. Kinetic energy increases

14. A. Kinetic energy

15. B. is not transferable

Sorry if I got any wrong, they should be all correct. I tryed.

Answer:

V₂ = 1.17 L

Explanation:

Given data:

Initial volume of balloon = 1.25 L

Initial temperature = 35°C

Final temperature = 15°C

Final volume = ?

Solution:

Initial temperature = 35°C (35+273.15K = 308.15 K)

Final temperature = 15°C (15+273.15 K = 288.15 K)

The given problem will be solve through the Charles Law.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 1.25 L × 288.15 K / 308.15 k

V₂ = 360.2  L.K / 308.15 k

V₂ = 1.17 L

To adjust the pH of a 1 L phosphate buffer solution from 7.6 to the desired pH of 7.2, you should:

1. Recognize that the pKa value closest to the desired pH of 7.2 is 7.2 (among the given pKa values for phosphoric acid: 2.2, 7.2, and 12.3).
2. Understand that you will be working with the second acid-base equilibrium of phosphoric acid (H2PO4- and HPO4^2-) since their pKa value is 7.2.
3. If the current pH is 7.6 and you want to lower it to 7.2, you will need to add an acid to the solution to increase the concentration of H2PO4- ions and decrease the concentration of HPO4^2- ions.
4. The best choice for an acid is a dilute solution of a strong acid, such as hydrochloric acid (HCl), as it will dissociate completely and not affect the buffer's composition significantly, other than the desired pH change.
5. Add the dilute HCl solution dropwise to the 1 L phosphate buffer while stirring and continuously monitoring the pH until it reaches the desired pH of 7.2.

So, by carefully adding a dilute strong acid like HCl to the phosphate buffer, you can adjust the pH from 7.6 to the desired 7.2, ensuring that the buffer functions correctly in your experimental procedure.

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If a student burns 3.53 moles of C3H8, 10.29 moles of carbon dioxide would be produced. Details about number of moles can be found below.

The number of moles of a substance can be calculated as follows:

The following chemical equation was given as follows:

C3H8 + 502 = 3CO2 + 4H₂O

1 mole of C3H8 produced 3 moles of carbon dioxide

Hence, 3.53 moles of C3H8 will produce 3.53 × 3 = 10.59 moles of CO2.

Therefore, if a student burns 3.53 moles of C3H8, 10.29 moles of carbon dioxide would be produced.

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Answer:

Comprehensive Two-dimensional gas chromatography, or GCxGC is a multidimensional gas

PO43- can form an ionic bond with a cation.

The chemical species which can easily form an ionic bond with a cation will be.

The definition of an ionic bond is a chemical bond that is formed between two ions that have opposite charges.

An Ionic bond is formed when one atom gives up one or more electrons to another atom.

These bonds can easily form between a pair of atoms or between molecules. This kind of bonding is most widely seen in bonds present in salts.

Compared to other options given,  is the best option as the total number of 32 valence electrons, is the highest among the given choices. Its tendency to form ionic bonds with the other cation is much higher as compared to others.

P has 5 electrons which combine with 4 O atoms which have 6 lone pairs and a -3 charge on it, which means it is accepting 3 electrons so it will be (+3), so total valence electrons will be 5 + 6 (4) + 3 = 32.

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Ethanol is a polar solvent, a flammable liquid made of gasoline and alcohol that fully and immediately combines with water instead of separating, which is the opposite of what a firefighter attempting to knock down a car fire might expect.

Answer:

Ethanol has a high vapor pressure. Therefore, even though you may not be able to see the particles of ethanol in the air, they are there and will readily fuel a combustion reaction if an open flame is nearby

A beaker containing 1.00 L of 2.00 M LiCl is allowed to sit undisturbed in a warm room. The new concentration of the lithium chloride solution is 2.16 M.

The number of moles of LiCl initially present in the solution is:

moles of LiCl = concentration x volume = 2.00 M x 1.00 L = 2.00 mol

After the water has evaporated, the number of moles of LiCl in the solution is still 2.00 mol, since no LiCl has been lost or added.

The new volume of the solution is 0.925 L.

Calculate the new concentration of the solution using:

New concentration = moles of LiCl / new volume

New concentration = 2.00 mol / 0.925 L

= 2.16 M

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Answer:r=1.2 d=2.4

Explanation:

Radius is half the diameter and the diameter is 2.4 m

Answer:

Divide the 2.4 by 3.14

Explanation:

the milliliters of 6.72 M hydrobromic acid solution required to prepare 4.50 L of 0.600 M are 400 mL.

To find the milliliters of 6.72 M hydrobromic acid solution that should be used to prepare 4.50 L of 0.600 M, we need to use the formula shown below:  `M₁V₁ = M₂V₂

`where `M₁` = initial concentration of the solution in mol/L `V₁` = volume of the solution in L `M₂` = final concentration of the solution in mol/L `V₂` = final volume of the solution in L

Given values are:

M₁ = 6.72

MV₁ = ?

M₂ = 0.600

MV₂ = 4.50 L

Substitute the values in the formula:

M₁V₁ = M₂V₂`6.72 M * V₁ = 0.600 M * 4.50 L

`Divide both sides by 6.72 M to get V₁ on one side: `V₁ = (0.600 M * 4.50 L) / 6.72 M`V₁ = 0.4 L = 400 mL

Therefore, the milliliters of 6.72 M hydrobromic acid solution required to prepare 4.50 L of 0.600 M are 400 mL.

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Reaction 1:  LiAlH4 (lithium aluminum hydride) or NaBH4 (sodium borohydride). Reaction 2:  LiAlH4 (lithium aluminum hydride) or NaBH4 (sodium borohydride) in combination with H2O (water).

In organic chemistry, reagents are substances used in chemical reactions to bring about specific transformations. In Reaction 1, the possible reagents include LiAlH4 and NaBH4, which are commonly used as reducing agents to reduce carbonyl compounds (such as aldehydes and ketones) to their corresponding alcohols. The choice between LiAlH4 and NaBH4 depends on the specific requirements of the reaction and the functional groups involved.

In Reaction 2, the appropriate reagents can be LiAlH4 or NaBH4 combined with H2O. This combination is commonly used in a two-step process known as a reduction followed by hydrolysis. The first step involves the reduction of a carbonyl compound to an alcohol using LiAlH4 or NaBH4, and then the second step involves the hydrolysis of the resulting alkoxide intermediate using water (H2O) to yield the final product.
The selection of the appropriate reagent(s) depends on factors such as the desired transformation, reaction conditions, and functional groups present in the starting material.


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The empirical formula of the compound is CH3O

What is Combustion ?

Combustion is an exothermic, high-temperature redox chemical reaction between a fuel (reductant) and an oxidant (usually oxygen in the atmosphere), producing oxidized, often gaseous, gases in a mixture called smoke. A shaped product is produced. Combustion does not always lead to fire, as the flame is only visible when the substance undergoing combustion is vaporized, but when this occurs, the flame is a characteristic indicator of the reaction. Activation energy must be overcome to initiate combustion (for example, by starting a fire using a lit match), but the heat of the flame provides enough energy to make the reaction self-sustaining can provide.

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Answer:

1) faster

2) slower

Explanation:

Answer:

faster

Explanation:

In this question, we have a situation where a gas is in constant pressure but changing its volume and temperature, and the best way to solve a situation like this, is through the Charles's gas law formula, which shows the relationship between volume and temperature when the pressure is constant. The formula is:

V1/T1 = V2/T2

We have:

V1 = 125 cm3, or 0.125 Liters

T1 = 10.0°C, or 283 K

V2 = 140 cm3, or 0.140 Liters

T2 = ?

Now we add these values into the formula:

0.125/283 = 0.140/T2

0.000442 = 0.140/T2

T2 = 0.140/0.000442

T2 = 317 K, or 44°C

Answer:

A. The oxygen atoms

Explanation:

A hydrocarbon combustion reaction consist of carbon, hydrogen and oxygen.  In balancing the hydrocarbon combustion reaction at first carbon and hydrogen atoms are balanced and at last oxygen atoms are balanced.

Oxygen atoms are balanced at the end because oxygen atom stand alone as O2 and easier to balance than hydrogen and carbon.

Hence, the correct option is "A".

The average atomic mass of this element with three isotopes is 36.33 amu.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable.

Average atomic mass of 3 isotopes is 35+36+38/3=36.33 amu.

Thus,the  average atomic mass of this element with three isotopes is 36.33 amu.

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

From the question

N = 4.36 × 10^25 molecules

We have

\(n = \frac{4.36 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 72.425249...\)

We have the final answer as

Hope this helps you

 The Equation to show the reaction are -

\(2Na(s)\rightarrow2Na^{+}+2e^{-}\)

\(Cl_{2}(g) +2e^{-} \rightarrow2Cl^{-}\)

A chemical equation is said to be balanced when the quantity of each type of atom in the reaction is the same on both the reactant and .

The balanced chemical reaction is

\(2Na(s)+Cl_{2} \rightarrow2NaCl(s)\)

Before reaction the sodium atom has zero oxidation state and after reacting with chlorine the oxidation state of sodium become +1 i.e., it is oxidised

Which gives the following reaction

\(2Na(s)\rightarrow2Na^{+}+2e^{-}\)

Similarly,before reacting with sodium the oxidation number of chlorine is zero and after reacting it is reduced to -1 oxidation state.

Which gives the following chemical reaction

\(Cl_{2}(g) +2e^{-} \rightarrow2Cl^{-}\)

From the combination of these reaction the main balance reaction is formed.

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Answer:

When an atom gains/loses an electron, the atom becomes charged, and is called an ion. Gaining an electron results in a negative charge, so the atom is an anion. Losing an electron results in a positive charge, so atom ion is a cation

Explanation:

Answerd the question : ion

Answer:

Explanation:

In order to balance equations, simply alter coefficients until all elements are equal on both sides of the reaction symbol ”—>”:

1HBr + 1KOH —> 1KBr + 1H2O

The reaction is already balanced

3HF + Fe(OH)3 —> FeF3 + 3H2O

To match the 3 Flluorines on the right hand side, add 3 to HF and then add 3 to H2O to compensate for the increase in hydrogens.

2HCl + Ca(OH)2 —> CaCl2 + 2H2O

The Chlorine must be balanced, and then hydrogen must be balanced.

Hope this helps! If it did, I would appreciate if you provided brainliest!

Answer:

Buffalo and Watertown.

Explanation:

This is correct as the Interior lowlands are located ib the US. These are correct as the others are in the US but aren't located anywhere near the Interior Lowlands.

Answer:

ITS FALSE electricity doesn't travel through wood same with cement!

If you had an aqueous mixture that contained Ag, K, and Pb²⁺ cations, two different solids could precipitate if a chloride solution was added.

Precipitation is the act of depositing or settling something out of a solution. Precipitation is a critical process that occurs in natural and industrial systems in a variety of ways. The formation of insoluble substances from soluble reactants is one of the most common causes of precipitation. When ions react and form a solid that is insoluble in water, this occurs. This is the general chemistry concept of a precipitation reaction.

A precipitation reaction occurs when two aqueous (soluble) ionic compounds combine, resulting in one of the ions in the mixture forming an insoluble or nearly insoluble solid called a precipitate. The other ion remains in solution. The precipitate, which appears as a cloudy suspension, can be filtered from the remaining aqueous solution.

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There are 3.25 million units in 0.65 ml of interferon injection. It's important to note that this calculation is based on the assumption that the concentration of the interferon injection is consistent throughout the solution.

To calculate the number of units in 0.65 ml of interferon injection, we need to use a simple multiplication formula. We know that 1 ml of interferon injection contains 5 million units (u/ml), so to find the number of units in 0.65 ml, we need to multiply 5 million by 0.65.
5 million u/ml x 0.65 ml = 3.25 million units
Therefore, there are 3.25 million units in 0.65 ml of interferon injection. It's important to note that this calculation is based on the assumption that the concentration of the interferon injection is consistent throughout the solution. It's always best to double-check with a healthcare professional to ensure accurate dosing and administration of medication.

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Answer:

the answer is true

Explanation:

the reason why is because if you look at it a chemical in a repeating form os a compound so that means it is the same properties for food.

Answer:

True

Explanation:

Many different species eat grass, and rabbits can eat other plants besides grass. Foxes, in turn, can eat many types of animals and plants. Each of these living things can be a part of multiple food chains.

The molar mass of the substance b was found to be 2.02 g/mol

what does effusion mean ?

1. The act of pouring forth; as in effusion of water, blood, grace, speech, and so on.

2. That which is poured out, either literally or metaphorically.

3. The escape of a fluid from its natural vessel, either by rupture or exudation through its walls. It may enter the substance of an organ or emerge on a free surface.

4. The liquid that is leaking or exuding.

5. The act of pouring out; that which is poured out

Finally, they remembered that England had frequently been harassed and invaded by the Romans, Saxons, Danes, Normans, and other nations at various times, resulting in great effusion of blood and frequent alteration of government constitutions; and if anything could be devised to prevent the like in the future, they should erect a lasting monument to their names.

Making his entry with much pomp and ostentation, he congratulated the ladies and shook each of their hands in both his own.

Virgie felt repugnance in every nerve as he shook hands with effusion.

The molar mass of the substance b was found to be 2.02 g/mol

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