please help :(( noone is helping

Answer:

0.75 M

Explanation:

Molarity = moles of solute / liters of solution

so;

Molarity = \(\frac{1.5 Moles}{2.0 Liters}\)

According to molar concentration, the molarity of this solution is 0.75 molar.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.Substitution in formula gives, molarity= 1.5/2=0.75 M

Thus,  the molarity of this solution is 0.75 molar.

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An emulsion is a mixture of two immiscible liquids, meaning they do not mix easily, such as oil and water. Brine, can help with the formation and stabilization of an emulsion.

In an emulsion, one liquid, called the dispersed phase, is distributed as small droplets throughout the other liquid, called the continuous phase. This distribution is usually achieved by the use of an emulsifying agent, which helps stabilize the emulsion by reducing the surface tension between the two immiscible liquids. Brine, is a highly concentrated salt solution. When added to the mixture, brine can influence the properties of the continuous phase by increasing its density and viscosity.

This results in a more stable emulsion as the droplets of the dispersed phase are less likely to coalesce or separate. Moreover, the presence of salt in the brine can also act as an electrolyte, modifying the interfacial tension between the two immiscible liquids. This change in interfacial tension can help to stabilize the emulsion, preventing the dispersed phase droplets from merging and the emulsion from breaking.

In summary, an emulsion is a mixture of two immiscible liquids, such as oil and water, where one is dispersed as small droplets throughout the other. Brine can assist in emulsion formation and stabilization by altering the density, viscosity, and interfacial tension of the mixture, resulting in a more stable emulsion.

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The equation that illustrates the relationship between wave velocity, frequency, and wavelength is: v = λ * f

v represents the wave velocity, which is the speed at which the wave travels through a medium. It is usually measured in meters per second (m/s).

λ (lambda) represents the wavelength of the wave, which is the distance between two consecutive points of similar phase on the wave. It is usually measured in meters (m).

f represents the frequency of the wave, which is the number of complete cycles or oscillations of the wave that occur in one second. It is usually measured in hertz (Hz).

The equation v = λ * f is known as the wave equation or the wave speed equation. It states that the wave velocity is equal to the product of the wavelength and the frequency of the wave.

This equation implies that as the frequency of a wave increases, the wavelength decreases, and vice versa, while keeping the wave velocity constant. In other words, if the frequency increases, the wave becomes more compressed and the distance between consecutive points of similar phase decreases.

On the other hand, if the frequency decreases, the wave becomes more spread out, and the distance between consecutive points of similar phase increases.

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The correct option is (C). The approximate final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).

To find the final volume of the solution, we can use the formula:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

Plugging in the values we know, we get:

(8.25 M) (25 mL) = (2.40 M) (V2)

Solving for V2, we get:

V2 = (8.25 M x 25 mL) / 2.40 M
V2 = 86.25 mL

Therefore, the approximate final volume of the solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M is 86 mL (option C).

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Answer:The age can be determined by utilizing carbon-14, a radioactive isotope of carbon.

Explanation:

Answer:

9.91 mL

Explanation:

Using the combined gas law equation as follows;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (torr)

P2 = final pressure (torr)

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

V1 = 15.0mL

V2 = ?

P1 = 760 torr

P2 = 1252 torr

T1 = 10°C = 10 + 273 = 283K

T2 = 35°C = 35 + 273 = 308K

Using P1V1/T1 = P2V2/T2

760 × 15/283 = 1252 × V2/308

11400/283 = 1252V2/308

Cross multiply

11400 × 308 = 283 × 1252V2

3511200 = 354316V2

V2 = 3511200 ÷ 354316

V2 = 9.91 mL

Bond order of N2+ is 2.5. It is a diamagnetic substance.

Bond order is termed as the number of chemical bonds between a pair of the atoms. For example: In case of acetylene the bond order between the two carbon atoms is 3, in diatomic nitrogen the bond order is 3, and the C-H bond order is 1.

The bond order of N2+ is 2.5.

Bond order = 1 / 2[Nb - Na] Where, Nb = no. of electrons in bonding molecular orbital and Na = number of electrons in antibonding molecular orbital.

Bond order = 9-4 / 2

= 2.5

N2+ is diamagnetic in nature because they do not have any unpaired electrons they are having 14 electrons.

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Answer:

The answer is Sulfur

Explanation:

Atomic number is a proton.

The atomic number of Phosporus is 15. ( 15 protons)

If you add one proton, it will become 16.

The element with the atomic number of 16 is sulfur.

Answer:

example of electromagnetic waves water waves and sound wave.

Types of mechanical waves are transverse and longitudinal wave...

Answer:

i believe its 1.56

Explanation:

energy which a body possess by virtue of being in motion

ex: a river flowing at a certain speed comprises kinetic energy as water has a certain velocity and mass

The buffer component ratio \([CH_3CH_2COO^-]/[CH_3CH_2COOH]\)of the propanoate buffer with a pH of 4.32 is approximately 0.278.

To calculate the buffer component ratio\([CH_3CH_2COO^-]/[CH_3CH_2COOH]\), we need to use the Henderson-Hasselbalch equation:

\(pH = pKa + log_{10}([A-]/[HA])\)

Given:

pH = 4.32

pKa = \(-log_{10}(Ka)\)=\(-log_{10}(1.3 * 10^-5)\) = 4.89

Now, let's rearrange the Henderson-Hasselbalch equation to solve for the buffer component ratio:

\(log_{10}([A-]/[HA]) = pH - pKa\)

Substitute the values into the equation:

\(log_{10}([A-]/[HA]) = 4.32 - 4.89\)

Now, we can solve for the buffer component ratio by taking the antilog of both sides:

\([A-]/[HA] = 10^{(4.32 - 4.89)}\\\[A-]/[HA] = 10^{(-0.57)}\\\[A-]/[HA] = 0.278\)

Therefore, the buffer component ratio \([CH_3CH_2COO^-]/[CH_3CH_2COOH]\)of the propanoate buffer with a pH of 4.32 is approximately 0.278.

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its D

random characters AAAJIJRIAJKLGIJHEOGEINDKIKAN

He is not falling nor about to fall which means he’s perfectly balanced. So this means the force in the photo and friction in this photo is in a balanced condition, balancing the boy.

In the given picture, the applied force and the force of friction are balanced. if two forces act in the direction to make the object in a balanced state.

If the forces are in a balanced state it does not change the motion of the object, and if it is in an unbalanced state, it causes to change in the state of the motion.

Therefore, the force of friction and the gravitational force are balanced is the correct option.

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The given question is incomplete, so the complete question image is attached in the image below.

Answer:

H - Cl2 +NaBr -> Br2+2NaCl

Answer:

carbon monoxide

I think its correct but I am not sure

Answer: when carbon is heated in air carbon dioxide is formed, so is incomplete combustion which results in carbon monoxide.

Explanation: but when carbon dioxide reacts with more oxygen carbon monoxide is formed i guess.

I AM A BIT SURE BUT HOPE THIS HELPSSSS!!!!

Answer:

c = λ f

c is the speed of light, λ the wavelength in meters, and f equals the frequency in cycles per second.

Explanation:

HNO3 and HBr can also be used instead of the provided acids (h2so4 and h3po4) to isolate solid copper in this experiment. Solid copper can be isolated by reacting it with acid. This is achieved in two stages: stage one, where copper reacts with sulfuric acid to produce copper sulfate and hydrogen gas, and stage two, where copper sulfate is reduced to copper using hydrogen gas.  

Therefore, in part b of the experiment, H2SO4 and H3PO4 are used. HNO3 and HBr can also be used instead of H2SO4 and H3PO4 to isolate solid copper. H2S and H2CO3 cannot be used as the acids to isolate solid copper. 'Hence, the correct options are : HNO3 and HBr Therefore, both HBr and HNO3 could be used in place of the acids (H2SO4 and H3PO4) to isolate solid copper in part b of this experiment.

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Answer:

I would say the top one but im not confident in the answer

C. It is located in the nucleus and has no charge

Explanation:

here ya go :)

Answer:

Hi! A substance with a pH of 11 is considered to be a base. Substances with a pH of 1-6 are considered to be acidic, substances with a pH of 7 are considered to be neutral, and substances with a ph of 8-14 are considered to be basic.

Have a great day! - Mani :)

Answer:

Base.

Explanation:

The pH scale includes the numbers 0 - 14, in which:

0 - 6 = acid, the smaller the number, the more acidic.

7 = neutral

8 - 14 = base, the greater the number, the more basic.

In this case, 11 falls within base, so your answer will be a base.

Answer

7.53% 97% if you divide it you can get the answer

Explanation:

All of the above options are hazards of magnesium. Magnesium can make skin irritation, eye damage, and respiratory tract irritation if it comes into contact with the skin, eyes, or if it's devoured.

Magnesium can also burn spontaneously in air, and it reacts violently with water, acids, and oxidizing agents. Ingestion of magnesium can bring abdominal pain, puking, diarrhea, and in severe cases, cardiovascular and central nervous system goods. thus, it's critical to follow proper safety procedures when handling magnesium.

Similar as using particular defensive equipment, avoiding ignition sources, and using the substance in a well sounded area.

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Answer: 5 and 11

Explanation:

protons= 5

neutrons=6

mass number= 6+5=11

Answer:

B. Energy

Explanation:

I took the quiz apix

Solution = 5,500g

NaOH = 22% of 5,500g

Therefore mass of NaOH is :

0.22 × 5,500g

1,210g

Meaning 1,210 grams inside the solution is Sodium hydroxide

The mass of sodium hydroxide in a solution that has a total mass of 5,500g and is 22% NaOH by mass is 121,000 g.

Mass percent of any substance present in any solution will be calculated as:
Mass % = (Mass of substance) / (Mass of solution)

In the question given that,

Mass percent of NaOH = 22%

Mass of solution = 5,500 g

On putting these values on the above equation we get,

Mass of NaOH = (22)×(5,500) = 121,000 g

Hence required mass of NaOH is 121,000 g.

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Based on the information provided, we can infer that camk2 is also a kinase, since it belongs to the same gene family as camk1. Camk2 is likely to have a similar function as camk1, which is phosphorylating target proteins in the cytosol.

Gene families are groups of genes that share a common ancestry and have similar functions. Since camk1 and camk2 are in the same gene family, they are likely to have similar characteristics and functions. Camk1 is specifically mentioned as a kinase that phosphorylates target proteins in the cytosol.

Therefore, it is reasonable to infer that camk2, being in the same gene family, would also be a kinase and have a similar function of phosphorylating target proteins in the cytosol. In summary, camk2 is inferred to be a kinase that phosphorylates target proteins in the cytosol, similar to camk1.

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From the given reaction, Oxygen serves as the limiting reagent. Methane remains after the reaction.

A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent. Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained.

Because its quantity restricts the number of products that can be generated, the reagent that is totally consumed or reacted is known as the limiting reagent.

CO₂ + 2H₂O ⇒ CH₄+ 2O₂

One mole of methane will totally react with two moles of oxygen to produce one mole of CO₂ and two moles of water, according to the stoichiometric equation given above.

64g of oxygen and 16g of methane will totally react in such case.

When methane is burned, the weight ratio of the reactions between CH₄ and O₂ is (16:64)=1:4.

Only 32 g of oxygen are provided in the question, though. Since we only have 32 when 64 is divided, oxygen will be the limiting reagent in this scenario.

Oxygen serves as the limiting reagent.

Methane is the extra reagent.

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