You mix 250 ml of 2. 1 m hbr with 200 ml of 2. 5 m koh. What is the ph of the resulting solution?.

Answer; 2.531 moles

Explanation:

Answer:

What are the Answer choices

The states of matter of the materials;

1) Dispersion forces - Yes

2) Hydrogen bonding - No

3) Ionic - No

4) Dispersion forces - No

5)  Dispersion forces - Yes

6) Ionic  - No

7) Hydrogen bonding - No

Sublimation is a physical process in which a substance transitions directly from its solid phase to its gaseous phase without passing through the intermediate liquid phase. In sublimation, the solid substance is heated, and the resulting gas molecules escape from the solid lattice structure without the need for melting.

One common example of sublimation is the process of dry ice. Dry ice is solid carbon dioxide (CO2) that sublimes at a temperature of -78.5 degrees Celsius (-109.3 degrees Fahrenheit). When dry ice is exposed to room temperature, it transitions directly from a solid to a gas, producing a fog-like effect.

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Answer: 1.2

Explanation:

Answer:

A Law

Explanation:

A scientific law talks about a law which has been observed and found to be always true but does not explain the reason behind it or the underlying causes which makes such an event to occur.

For example the law of conservation of energy states that energy can neither be created or destroyed, but can be converted from one form to another or transferred from one object to another.

In this law there is no reason why this happens and doesn’t state the causative factors.

Answer:

See Explanation

Explanation:

Renewable energy sources refers to those energy sources that can never be depleted. This means that they can be used severally without getting exhausted. Solar, biomass, wind and hydroelectric power are all renewable energy sources.

Hence, from the perspective described above, we can say that wind is a form of solar energy because wind is formed when the air is heated by the sun.

Hydroelectric power is driven by the water cycle. This water cycle somehow depends on the sun to run efficiently. So, hydroelectric power can also be considered to be a form of  solar energy.

The given statement "temperature‐responsive polymer/carbon nanotube hybrids: smart conductive nanocomposite films for modulating bio-electro catalysis of NADH" will be true. Because, Temperature-responsive polymers are capable of changing their physical properties, such as swelling or shrinking, in response to changes in temperature.

By incorporating carbon nanotubes into the polymer matrix, a conductive nanocomposite film is created. This film exhibits enhanced electrical conductivity due to the presence of carbon nanotubes.

The combination of the temperature-responsive polymer and the conductive properties of carbon nanotubes allows for the modulation of bio-electro catalytic reactions involving NADH. By controlling the temperature, the physical properties of the polymer can be altered, which in turn affects the conductivity of the nanocomposite film. This modulation of conductivity influences the efficiency and rate of the bio-electro catalysis of NADH.

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--The given question is incomplete, the complete question is

"Temperature‐responsive polymer/carbon nanotube hybrids: smart conductive nanocomposite films for modulating the bio-electro catalysis of NADH. TRUE/ FALSE."--

The solubility of Mg(OH)2 in g/L in an aqueous solution buffered at pH = 8.60, we can use the Ksp expression for the compound and the relationship is 3.26*10^7 g/L..

Ksp (Mg(OH)2) = [Mg2+][OH-]^2 = 5.61 * 10^-12 M3

At pH = 8.60, the concentration of hydroxide ions can be calculated using the following equation:

pH = -log[OH-]

so [OH-] = 10^-8.60

We can then use the Ksp expression and the concentration of hydroxide ions to find the solubility of Mg(OH)2:

5.61 * 10^-12 = [Mg2+][OH-]^2

= Mg2+^2

= [Mg2+] (10^-17.2)

The solubility of Mg(OH)2 in molarity is [Mg2+] = Ksp/[OH-]^2

so [Mg2+] = 5.6110^-12 / (10^-17.2) = 5.6110^5 M

To convert the solubility from molarity to g/L, we can use the formula

g/L = molarity * molar mass

The molar mass of Mg(OH)2 = 58.32 g/mol

so the solubility of Mg(OH)2 in g/L is:

solubility = 5.61 * 10^5 * 58.32 = 3.26 * 10^7 g/L

So the solubility of Mg(OH)2 in an aqueous solution buffered at pH = 8.60 is approximately 3.26*10^7 g/L.

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Answer:

the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.

Answer:

Blanket underneath the furniture may reduce the kinetic friction

Explanation:

When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.

By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.

Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.

(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)

Stay positive and Take care,

A fellow mate,

Cheers !

The leading five nations in terms of carbon dioxide emissions (metric tonnes per person) are Afghanistan (0.30), Albania (1.96), Algeria (3.71), Andorra (6.40), and Angola (1.06).

For the first five nations in the data set, the carbon dioxide emissions (measured in metric tonnes per person) are as follows: Afghanistan is rated as 0.30, Albania is 1.90, Algeria is 3.70, Andorra is 5.80, and Angola is 1.20. According to the statistics, there are huge differences between the CO2 emissions that various nations produce per person, with some producing very little and others producing a lot. This diversity can be linked to a variety of things, such as disparities in economic growth, energy use, and governmental environmental protection measures. In order to combat the consequences of global warming and the problems posed by climate change, it is imperative to reduce CO2 emissions.

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Starch is a complex carbohydrate that is primarily made up of glucose molecules.

It is made up of many molecules that are connected together to form a long chain or polymer.

Starch is a polysaccharide, which means it is made up of many monosaccharide (simple sugar) molecules joined together.
The glucose molecules in starch are joined together by alpha-glycosidic linkages.

Starch is comprised of hundreds and perhaps thousands of glucose molecules.

The number of glucose molecules in a starch molecule can vary, but the average size of a starch molecule is around 1,000 glucose molecules.
Starch is an important food source for humans and other animals.

It is found in a variety of foods, including potatoes, rice, bread, and pasta.

When we eat foods that contain starch, our bodies break down the starch into glucose molecules that can be used for energy.
In conclusion, starch is comprised of hundreds and perhaps thousands of glucose molecules.

Starch is an important food source for humans and other animals.

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In order to demonstrate that intramolecular forces are stronger than intermolecular forces, a block of ice will be heated in a sealed container until it turns into steam.

Because the forces holding together compounds are stronger than the forces holding together molecules, intramolecular forces are stronger than intermolecular forces.

Intermolecular forces exist between molecules, but intramolecular forces exist between atoms within a molecule. This is the primary distinction between intermolecular and intramolecular forces.

Look for the molecule with the most polarity, the most electronegative atoms, or the most hydrogen bonding groups if the molecules have identical molar weights and similar intermolecular forces. That one will have the overall stronger IMFs.

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Answer:

Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.

Explanation:

We study the various atomic models in our course of study because, it is important for us to know, how did people come to the present concept of an atom. How did physics evolve from classical to quantum physics.

All these are important for us to know and thus, knowledge about various atomic models, their discoveries and drawbacks and finally improvements based on scientific evidence present at that time is important for us to understand the underlying theory very well.

Explanation:

A DAY IN THE LIFE OF METIS JOURNAL. I WROTE IT HOPE U LIKE IT XD

We, who live in the west, were Nomadic. So we always moved from place to place to hunt buffalo and other fur-bearing animals. And now again we have to shift everything we collected , like, all the essential needs we collected. It’s really hard to shift stuff, But when you move to a new place you get to see new beautiful places. They are just so satisfying to see! It’s like all my work(like the shifting work) is paid off. I love it! We always meet the Hudson’s bay company employees, and give them furs which we took from the bissons and other furry animals we hunted. And in exchange they give us their (Hudson’s Bay company) goods. Which is good! Because then we or I won't be able to enjoy that delicious pemmican!

 The one reason that makes me proud of my parents is that because of them I am like a translator for both sides in the fur trade! Anyways coming back to the present. As I said before, we were moving today to another place, But on the way some people along with my father will ride the famous York boats carrying supplies to fur posts. I begged my father to take me with him! And as usual he gave me some silly reason for me to stay. And now since I don’t have anything to do I will-..Nevermind, My mom’s calling me. Okay after helping my mom keep the fur posts into the York boats me , my mom, and the others are just relaxing and enjoying nature just to take a break. Since, I am so obsessed with my Journal notebook today I’m just going to sit here and right what comes to my mind. I’m not like the others who always seem to be talking with someone. I like my own space! 

I kind of miss my dad already, but he and his fellow members need to travel the waterways from the red river further west and north to hudson bay. These red river carts also travel the trek back and forth over land to St. Paul, Minnesota and to posts in saskatchewan.  Speaking about the red river, the only large settlement in the region is the red colony. About 12000 people lived in this colony around Fort Garry. Some were the original Selkirk settlers or their descendents. They had come from Scotland with lord Selkirk when he established the colony in 1811. Many of these original settlers were poor farmers who had been displaced  from their lands in scotland. They had endured many hardships in the early years of settlement, including foods, hunger, and sickness. I love studying about other colonies, cultures , history etc.

The molecule H₁₂O₆ does not exist in nature. The formula H₁₂O₆ suggests the presence of 12 hydrogen atoms and 6 oxygen atoms.

However, such a configuration is highly unstable and does not conform to the principles of chemical bonding and stability. In a typical molecule of water (H₂O), two hydrogen atoms are bonded to one oxygen atom. The Lewis structure for water would represent this bonding arrangement. Each hydrogen atom contributes one valence electron, and oxygen contributes six valence electrons.

The Lewis structure for water would show two lines (representing covalent bonds) connecting the oxygen atom to each hydrogen atom. Additionally, the oxygen atom would have two lone pairs of electrons (represented by dots) surrounding it. It is important to note that the Lewis structure represents the valence electron arrangement in a molecule and provides insight into its bonding and geometry.

However, the Lewis structure alone may not capture the full 3D shape and molecular properties. In the case of H₁₂O₆, the presence of 12 hydrogen atoms and 6 oxygen atoms is highly unlikely due to the unfavorable electron configuration and excessive charge repulsion.

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Explanation:

d. nitrogen gas because of weak intermolecular force

The number of moles of acid present in the 100.0 mL solution is 0.001444 mol.

The balanced chemical equation for the reaction is:

acid + NaOH → salt + water

Since the acid is monoprotic, we can assume that one mole of acid reacts with one mole of NaOH. Therefore, the number of moles of acid present in the 30.00 mL sample is equal to the number of moles of NaOH added at the endpoint of the titration. We can calculate the number of moles of NaOH using the formula:

moles NaOH = concentration of NaOH × volume of NaOH

moles NaOH = 0.09459 mol/L × 45.78 mL / 1000 mL/mL

moles NaOH = 0.004332 mol

Since one mole of acid reacts with one mole of NaOH, the number of moles of acid present in the 30.00 mL sample is also 0.004332 mol.

Now we need to find the number of moles of acid present in the original 100.0 mL solution. We can use the formula:

moles acid = mass of acid / molecular weight of acid

The molecular weight of the acid can be determined by using the titration data to calculate the molarity of the acid solution. From the titration data, we know that:

moles NaOH at endpoint = moles acid in 30.00 mL

moles NaOH at endpoint = 0.004332 mol

volume of acid in 100.0 mL = 30.00 mL / 100.0 mL × 1000 mL/L = 300.0 mL/L

molarity of acid = moles acid/volume of acid in L

molarity of acid = 0.004332 mol / 0.3000 L

molarity of acid = 0.01444 mol/L

Now we can use the molarity and volume of the acid solution to calculate the number of moles of acid in the 100.0 mL solution:

moles acid = molarity of acid × volume of acid in L

moles acid = 0.01444 mol/L × 0.1000 L

moles acid = 0.001444 mol

Therefore, the number of moles of acid present in the 100.0 mL solution is 0.001444 mol.

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Answer: 4.12

Explanation:

we know that the given mol is 8.23 mol and they are 2NaI and I2 so we will write the equation like this.

8.23mol NaI x 1mol of I2 ÷ 2molNaI = 4.115≅ 4.12 mol of I2

we placed NaI at the bottom to cancel out with the 8.23 mol of NaI

Answer:

Darwin's book introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution.

From the diagram shown, we can see that the part of the hydrologic cycle required is represented by the letter D.

The hydrologic cycle is the cycle that shows the movement of water in nature.

The hydrologic cycle has atmospheric, lithospheric and  hydrospheric components which are all important in nature.

Part D of the hydrologic cycle shows the interaction of surface and ground water. It is affected by impervious building materials, such as concrete and asphalt.

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According to the question the concentration of sulfur trioxide 0.0054mol/L.

Trioxide is a chemical compound made up of three atoms of oxygen. It can exist as a solid, liquid or gas depending on the temperature and pressure conditions. It has a formula of O₃ and is also known as ozone. Trioxide is a powerful oxidizer and is corrosive to many materials, particularly organic compounds.

The concentration of sulfur trioxide in this reaction can be calculated using the mass balance equation. The equation is as follows:
Mass of Sulfur Trioxide (g) = (Mass of Sulfur (g) x 2) / Molecular Mass of Sulfur Trioxide
In this case, the mass of sulfur trioxide = (6.5g x 2) / 80.06g = 0.163g
Therefore, the concentration of sulfur trioxide = 0.163g/30.2g = 0.0054mol/L

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Complete Question:
If 6. 5g of sulfur reacted with oxygen to produce sulfur trioxide. What is the concentration to sulfur trioxide 2SO_2 +30_2→ 2SO_3?

Dilution is the method of decreasing the solute concentration in the solution by adding solvent. The new volume after dilution is 147 mL.

Molarity and dilution are inversely proportional as the increase in the dilution of the solution the molarity of the solution will decrease as the number of moles of the solute will decrease.

The volume of the diluted solution can be calculated as:

\(\rm M_{1}V_{1} = M_{2}V_{2}\)

Where,

Initial molarity =  1.75 M

Initial volume = 84 mL

Final molarity = 1.0 M

Final volume = ?

Substituting values in the equation:

\(\begin{aligned}\rm V_{2} &= \dfrac{\rm M_{1}V_{1} }{\rm M_{2}}\\\\&= \dfrac{1.75 \times 84.0}{1}\\\\&= 147\;\rm mL\end{aligned}\)

Therefore, 147 mL is the new volume after dilution.

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Mice and birds excrete nitrogenous wastes in the form of uric acid. The correct option is a).

Uric acid is a nitrogenous waste product that is excreted by some animals, including birds, reptiles, and insects. It is a relatively non-toxic compound that can be excreted in a semi-solid form, which helps conserve water.

Mammals, on the other hand, typically excrete nitrogenous wastes in the form of urea or ammonia, which requires more water to eliminate from the body. Therefore, among the given options, only mice and birds excrete nitrogenous wastes in the form of uric acid.

Mice are mammals that produce urea as their primary nitrogenous waste product. However, birds excrete nitrogenous wastes in the form of uric acid, which is produced in the liver and excreted from the cloaca. Therefore, option a) is the correct answer.

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A 50-mL vial of SENSORCAINE/EPINEPHRINE solution contains approximately 0.25 mg of epinephrine. This is calculated based on the concentration of 1:200,000 w/v in the solution.

To determine the amount of epinephrine (mg) in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution, we need to consider the concentration of epinephrine in the solution. The solution contains 1:200,000 w/v epinephrine, which means that for every 1 part of epinephrine, there are 200,000 parts of the solution.

To calculate the amount of epinephrine in the solution, we can use the following formula:

Amount of epinephrine = Total volume of solution (mL) × Concentration of epinephrine (mg/mL)

In this case, the total volume of the solution is 50 mL, and the concentration of epinephrine is 1:200,000 w/v. To convert the concentration to mg/mL, we divide 1 mg by 200,000 mL:

Concentration of epinephrine (mg/mL) = 1 mg / 200,000 mL = 0.000005 mg/mL

Finally, we can calculate the amount of epinephrine in the 50-mL vial:

Amount of epinephrine = 50 mL × 0.000005 mg/mL = 0.00025 mg

Rounding to the nearest hundredth, the amount of epinephrine in a 50-mL vial of SENSORCAINE/EPINEPHRINE solution is 0.25 mg.

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When constructing a conversion factor to use in a stoichiometry problem, the coefficients from the balanced equation are used. The coefficients represent the relative number of moles of each substance involved in the chemical reaction. Subscripts from the chemical formulas, on the other hand, represent the ratio of atoms within a single molecule and are not used directly in constructing conversion factors for stoichiometry calculations.

In stoichiometry problems, conversion factors are used to relate the quantities of different substances involved in a chemical reaction. These conversion factors are derived from the balanced equation representing the reaction.

The coefficients in the balanced equation represent the relative number of moles of each substance involved in the reaction. For example, consider the balanced equation: 2A + 3B -> 4C. From this equation, we can determine that for every 2 moles of substance A, 3 moles of substance B are required to produce 4 moles of substance C.

Conversion factors are constructed by using the coefficients of the substances involved in the reaction. For instance, if we want to convert from moles of A to moles of C, the conversion factor would be 4 moles of C / 2 moles of A.

Subscripts from the chemical formulas, which indicate the ratio of atoms within a single molecule, are not used directly in constructing conversion factors for stoichiometry problems. However, they do play a role in determining the molar masses of the substances involved, which are needed to convert between mass and moles in stoichiometry calculations.

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Answer: mitochondria

Explanation:

it affects the cell because it produces the power of the cell, let me know if this helpes

Amino acids can be converted into triglycerides to provide additional energy and generate body fat. Triglycerides are the primary form of stored fat in the body and are composed of three fatty acid molecules attached to a glycerol backbone. Here option C is the correct answer.

The process by which amino acids are converted into triglycerides is known as lipogenesis. During lipogenesis, excess amino acids that are not needed for protein synthesis can be broken down and converted into intermediate molecules, such as acetyl-CoA.

Acetyl-CoA serves as a building block for fatty acid synthesis. Through a series of enzymatic reactions, acetyl-CoA is combined with other molecules to form fatty acids, which are then incorporated into triglycerides.

This conversion primarily occurs in the liver, although adipose tissue (fat cells) also plays a role in storing triglycerides. When the body requires energy, triglycerides can be hydrolyzed back into fatty acids and glycerol through a process called lipolysis. Fatty acids can then be metabolized and used as a source of energy through beta-oxidation.

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Complete question:

Which of the following substances do amino acids get converted into to provide additional energy and generate body fat?

a) Glucose

b) Glycogen

c) Triglycerides

d) Ketones

All of the methods (1) to (4) could potentially be used to separate peptides produced by chymotrypsin treatment,

Depending on the specific properties of the peptides and the separation conditions.

(1) Chromatography on a cationic column, at pH=7, could be used to separate peptides based on their charge properties.

(2) Chromatography on an anionic column, at pH=4, could also be used to separate peptides based on their charge properties, but in this case, the pH is lower, and the column is negatively charged, so peptides with a net positive charge would bind less strongly and elute earlier, while peptides with a net negative charge would bind more strongly and elute later.

(3) Size exclusion chromatography could be used to separate peptides based on their size. Peptides that are larger would elute earlier, while smaller peptides would elute later, as they pass through the porous stationary phase.

(4) Electrophoresis could be used to separate peptides based on their charge properties and size. Peptides with a net positive charge would migrate towards the negative electrode, while peptides with a net negative charge would migrate towards the positive electrode.

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Answer:

-205.7kj

Explanation:

Now adding reaction 2 and twice of reaction 3 and reverse of reaction 1, we get the enthalpy of the reaction.

The expression for enthalpy for the following reaction will be,

where,

n = number of moles

Now put all the given values in the above expression, we get:

Therefore, the enthalpy of the following reaction is,  -205.7kj

1 . 3 3 7 5 × 1 0 2 3 f o r m u l a u n i t s