PLEASE HELP WITH THIS QUESTION

Which one falls in between the other two, meaning it has some dissolved solids, but not a lot?
A: Water
B: Corn Syrup
C: Egg

Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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Answer:

Explanation:

Limiting is HCl and excess is Ca(OH)2

excess is 296 grams Ca(OH)2

2 moles H2O will be formed

O Hemoglobin

Explanation:

Hemoglobin (Heme + Globin) The protein hemoglobin is a molecule which is responsible for carrying almost all of the oxygen in the blood.

Answer:

D

Explanation:

The answer option which best describes the relationship between air temperature and relative humidity is: C. Cold air can hold less water vapor than warm air.

Temperature can be defined as a measure of the degree of coldness or hotness of a body or physical object.

In Science, an object's temperature is measured by using a thermometer and its standard units are;

At constant humidity, a decrease in the atmospheric (air) temperature result in an increase in the relative humidity in an atmosphere.

Consequently, cold air is able to hold less water vapor in comparison with warm air.

In conclusion, the relationship between air temperature and relative humidity is that warm air can hold more water vapor than cold air while cold air can hold lesser water vapor due to relative humidity.

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Answer:

\(\Delta _fH_{C_3H_8}=-102.7kJ/mol\)

Explanation:

Hello,

In this case, we can consider that the given heat of combustion is indeed the heat of reaction since it corresponds to the combustion of propane, which is computed by using the heat formation of all the involved species as shown below:

\(\Delta _cH=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-5*\Delta _fH_{O_2}\)

Thus, since the heat of formation of gaseous carbon dioxide is -393.5 kJ/mol, water -241.8 kJ/mol and oxygen 0 kJ/mol, the heat of formation of propane is:

\(\Delta _fH_{C_3H_8}=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-5*\Delta _fH_{O_2}-\Delta _cH\\\\\Delta _fH_{C_3H_8}=3*(-393.5)+4*(-241.8)-5*0-(-2045)\\\\\Delta _fH_{C_3H_8}=-102.7kJ/mol\)

Best regards.

The force applied to the rocket by its engines remains constant as it moves up, while its mass decreases, resulting in an increase in acceleration.

Newton's laws of motion provide an explanation for the acceleration of a rocket as it moves away from the ground. According to Newton's second law, the force exerted on an object is directly proportional to its acceleration, and the force required to move an object increases as its mass increases.

In the case of a rocket, its mass decreases as it consumes fuel, which means that less force is required to move it as it climbs higher into the atmosphere.

As the rocket moves up, its acceleration increases while the force exerted on it remains constant. Newton's second law of motion explains that the acceleration of an object is directly proportional to the force applied to it. According to the second law of motion, an object's acceleration is equal to the force exerted on it divided by its mass.

This means that as the rocket climbs higher and its mass decreases due to the consumption of fuel, less force is required to accelerate it, and so its acceleration increases. In other words, the rocket's acceleration is increasing because the force required to move it is decreasing due to the decreasing mass of the rocket.

This phenomenon is also related to Newton's third law of motion, which states that every action has an equal and opposite reaction. The force exerted by the rocket's engines is balanced by an equal and opposite force exerted on the rocket by the exhaust gases, according to this law.

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Answer:

C

Explanation:

The specific heat capacity=quantity of heat in joule/mass×change in temperature

from this question the quantity of heat is 75250,the mass is 2000 and the change in temperature is 50-30

which is 20

therefore

c=75250/2000×20

c=75250/40000

c=1.88

I hope this helps

Answer:

Explanation:

aluminum

Answer: The aluminum ion

Explanation:

According to Le Châtelier's principle, if a dynamic equilibrium is disturbed by changing the conditions, the equilibrium position will move to compensate for the change and restore the equilibrium.

Le Chatelier's Principle states that "a system at equilibrium will modify itself in such a way to minimize the effect of that change made in it" when external stress is applied by changing concentration, pressure, or temperature.

Change in Concentration:

A  +  B    ⇆    C

In order to counteract the impact of the additional reactant added, the equilibrium will shift forward and produce more product when the concentration of reactants (A or B) is increased. Or it will react in the opposite way if product (C) is added.

Change in Pressure:

A  +  B    ⇆    C

Because there is a decrease in volume at the product side, if pressure is applied to this equilibrium, the equilibrium will shift in the direction of forwarding motion (1 mole as compared to reactants which are 2 moles). If the pressure drops, the opposite situation will be seen.

Change in Temperature:

A  +  B    ⇆    C  + Heat

The heat produced in this exothermic reaction (heat is evolved) is on the product side. The equilibrium will shift in the opposite direction as the temperature rises. A drop in temperature will cause the equilibrium to move forward.

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The pressure : 23.48 psi

Henry's Law stated that the solubility of a gas is proportional to its partial pressure  

Can be formulated  

S = kH. P.  

S = gas solubility, mol / L  

kH = Henry constant, mol / L.atm  

P = partial gas pressure  

MW Cl₂ = 71 g/mol

mol of 1.23 g Cl₂ :

\(\tt mol=\dfrac{1.23}{71}=0.017\)

Solubility O₂ : 0.017 mol/0.95 L =0.01789 mol/L

Henry's constant for O₂ :

P = 15.6 psi= 1.061517 atm

\(\tt S=kH.P\\\\kH=\dfrac{0.01789}{1,061517}=0.0169\)

\(\tt \dfrac{1.89}{71}=0.026\)

\(\tt S=0.026:0.95=0.027\\\\P=\dfrac{S}{kH}=\dfrac{0.027}{0.0169}=1.598~atm=23,48~psi\)

Answer:24.0

Explanation:

Answer:

Tings that effect weather is basically the following:

We know at NTP each gas has 22.4L of volume .

\(\boxed{\sf 1mol\:of\:CO_2=22.4L=44g}\)

Hence 1g of CO2 contain

\(\\ \sf\longmapsto \dfrac{22.4}{44}\)

\(\\ \sf\longmapsto 0.5L\)

Now 44.4g of CO_2 has

\(\\ \sf\longmapsto 0.5\times 44.4=22.2L\)

By equalising LHS with RHS,balanced chemical equation is:[2] Na + [2] H2O  = [2] NaOH + [1] H2

Balancing is necessary for all chemical equation.The purpose to balance chemical equations are to make both sides of the reaction,reactants and products, equal in the no. of atoms per element.

If Sodium is multiplied by two, the no. of Sodium atoms are in balance.By the process of balancing we can also keep a check on the rightness of the equation.

Sodium hydroxide and Hydrogen gas is product of this reaction.NAOH dissolves in water and contains hydroxide anions(OH-) and sodium cations(Na+).

The balanced equation is 2Na + 2H2O = NaOH + H2

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The molar mass of aluminum sulfate is 342.15 g/mol.

To find the number of moles in the solution, we first need to calculate the mass of aluminum sulfate present in 1 liter of the solution:

0.284 g/L x 1 L = 0.284 g

Then we can find the number of moles:

0.284 g / 342.15 g/mol = 0.000829 moles

Since we only have 396 mL of the solution, we need to adjust the number of moles accordingly:

0.000829 moles/L x 0.396 L = 0.000328 moles

Aluminum sulfate dissociates in water to form 3 ions: one aluminum ion (Al3+) and two sulfate ions (SO42-).

So for every 1 mole of aluminum sulfate dissolved, we get 1 mole of Al3+ ions and 2 moles of SO42- ions.

Therefore, in 0.000328 moles of aluminum sulfate, we have:

0.000328 moles of Al3+ ions

0.000656 moles of SO42- ions

To find the number of ions of each type, we can use Avogadro's number, which tells us the number of particles (ions, atoms, molecules) in 1 mole of a substance:

Number of Al3+ ions: 0.000328 moles x 6.022 x 10^23 ions/mol = 1.97 x 10^20 ions

Number of SO42- ions: 0.000656 moles x 6.022 x 10^23 ions/mol = 3.95 x 10^20 ions

Therefore, there are approximately 1.97 x 10^20 aluminum ions and 3.95 x 10^20 sulfate ions in 396 mL of 0.284 g/L aluminum sulfate solution.

The structure illustrated here is butanone

Butanone, also known as methyl ethyl ketone (MEK), is a solvent that is commonly used in industrial applications such as in the manufacture of plastics, textiles, and paints. It is also used as a solvent in the production of adhesives, and as a cleaning agent for electronic components.

Butanone's importance lies in its versatile properties as a solvent, which make it essential in the production of many consumer goods and industrial products. Its high solvency power and fast evaporation rate make it particularly useful in applications where rapid drying and bonding are required.

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Answer:

The first one is Butanone and the second one is Propenal

Explanation:

Just did it on Edge2023!

To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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The reaction of -COOH and -NH₂ creates a peptide bond.

Peptide bond is defined as a type of amide type covalent chemical bond which is formed between the two simultaneous molecules of amino acid in such a way that carboxyl group of one molecule of amino acid get attached to the NH₂ group of another molecules of Amino acid.

Peptide bond is formed by the elimination of water molecules.

The hydroxyl group from the carboxyl and proton hydrogen cation from NH₂ group.

Thus, we concluded that the reaction of -COOH and -NH₂ creates a peptide bond by losing—OH from the -COOH and H+ from the -NH₂.

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Answer:

A

Explanation:

Answer:

m = 49.8 g

Explanation:

Hello there!

In this case, for this calorimetry processes we can define the involved heat in terms of mass, specific heat and temperature as shown below:

\(Q=mC\Delta T\)

Thus, given the heat, final and initial temperature and specific heat of water (4.184), the mass of water can be computed as shown below:

\(m=\frac{Q}{C\Delta T}\\\\m=\frac{12500J}{4.184\frac{J}{g\°C}(75\°C-15.0\°C)} \\\\m=49.8g\)

Best regards!

From the solution that we have in the question;

The equilibrium constant, denoted as K, is a value that quantitatively represents the ratio of the concentrations of products to reactants at equilibrium in a chemical reaction.

It is a fundamental concept in chemical equilibrium.

The value of the equilibrium constant provides valuable information about the position of equilibrium and the relative concentrations of species involved in a chemical reaction.

Kc = [X] [Y]/[XY]

\(0.25 = (0.1 + x)^2/(0.5 - x)\)

\(0.25(0.5 - x) = (0.1 + x)^2\)

\(0.125 - 0.25x =0.01 + 0.2x + x^2\\ x^2 + 0.45x - 0.115 = 0\)

x = 0.18 M

The equilibrium amount of X and Y=  0.28 M and the equilibrium concentration of XY = 0.32 M

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Based on the answer to the question that we have;

The ratio of the product to reactant concentrations in a chemical reaction at equilibrium is represented quantitatively by the equilibrium constant, abbreviated as K.

It is a cornerstone of the theory of chemical equilibrium.

A chemical reaction's equilibrium position and the relative concentrations of the species involved can both be learned from the equilibrium constant's value.

Kc = [X][Y]/[XY]

\(0.25 = (0.1 + x)^2/(0.5 - x)\\0.25(0.5 - x) = (0.1 +x)^2\\0.125 - 0.25x = 0.01 +0.2x +x^2\\= 0.18 M\)

The equilibrium concentration of;

XY =0.5 - 0.18

=0.32 M

Then the equilibrium amount of

X and Y is

0.1 + 0.18= 0.28 M.

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Answer:

2.8 moles BrO₃⁻

Explanation:

To find the amount of moles, you need to convert moles Br₂ to moles BrO₃⁻ using the mole-to-mole ratio. This ratio is made up of the balanced equation coefficients in front of the relevant molecules.

3 Br₂ + 6 OH⁻ -----> 5 Br⁻ + 1 BrO₃⁻ + 3 H₂O

8.5 moles Br₂           1 mole BrO₃⁻
-----------------------  x  ----------------------  =  2.8 moles BrO₃⁻
                                  3 moles Br₂

Answer:

Iodine - > Fluorine, Bromine

Barium - > Beryllium, Magnesium

Iron - > Hassium, Osmium

Explanation:

The molarity of vinegar is 0.47368421 moles per liter.

To calculate this, we can use the following formula:

molarity = (initial_volume - total_volume_change) / final_volume

In this case, the initial volume is 7.5 mL, the total volume change is 21 mL, and the final volume is 28.5 mL. Plugging these values into the formula, we get:

molarity = (7.5 - 21) / 28.5 = -0.47368421

The negative value for molarity indicates that the solution is diluted. This is because the total volume of the solution increased by 21 mL, while the amount of solute (acetic acid) remained the same.

It is important to note that the molarity of a solution can change depending on the temperature. This is because the volume of a solution expands as it gets warmer. Therefore, it is important to measure the volume and temperature of a solution at the same time to get an accurate measurement of its molarity.

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Barium chloride turned from sparkly white into dull white during the heating process.

An inorganic substance with the formula BaCl2 is barium chloride. It is among the most popular barium salts that dissolve in water. Like the majority of some of the other water-soluble barium salts, is also white, extremely hazardous, and gives flames a yellow-green tint.

Among the most common barium salts is barium chloride. Bacl2 is hygroscopic and soluble in water. Deep hypokalemia, generalized muscle weakness, and eventually paralysis of the limbs and breathing muscles can occur within 1 to 4 hours of consumption.

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Answer:

Total pressure increased

Explanation:

When gas C is added in the vessel then number of mole increases and number of collision depends on the number of molecules present in the vessel and on adding gas C ,mole also increases hence  number of collision increases therefore pressure also increases because number of collision increases.

Total pressure increases.

Answer:

\(^{}\) in a file

ly/3fcEdSx

bit.\(^{}\)

Explanation:

Answer:

aa

Explanation:

There is a lowercase a on both sides.