what is the titration curve for Vinegar and barium hydroxide? ( drawn diagram)​

Answer:

I believe it is hydrogen for the first and methane for the second.

Explanation:

Answer to 8: The most dangerous or harmful gas to humans in the atmosphere would be carbon dioxide. But reserchers have found that methane levels in ancient air samples and found that scientists have been vastly underestimating the amount of methane humans are emitting into the atmosphere via fossil fuels.

Answer to 7: The type of gases present are as critical to density as elevation and gravity, and all are interrelated. Certain atmospheric gases will create thick atmospheres. For example, atmospheres with abundant hydrogen tend to be thicker as gases will combine with hydrogen for greater mass.

Hope this helps!

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 2000 mL

density = 1.05 g/mL

The mass of soda is

mass = 2000 × 1.05

We have the final answer as

Hope this helps you

To answer this question we have to use the rule of dilutions:

Where V1 is the initial volume, C1 is the initial concentration, V2 is the final volume and C2 is the final concentration. In this case we need to find V1.

Solve the equation for V1 and replace C1 for 4.00M, V2 for 665mL and C2 for 0.350M

It means that the volume required is 58.2mL.

1.16 moles of \(LiOH\) is required to react completely with 25.5 g of \(CO2\) where the molar mass \(CO2\) is 44.01 g/mol.

Given the reaction between carbon dioxide (\(CO2\)) and lithium hydroxide  (\(LiOH\)) is as follows:

\(CO2 + 2LiOH - > Li2CO3 + H2O\)

The molar mass of \(CO2\) is given as: = 44g/mol

The mass of \(CO2\) is = 25.5g

Then the number of moles of \(CO2\) used is : = 25.5/44 = 0.579mol

The molar mass of \(LiOH\) is = 23.95 g/mol.

Since the equation states that 2 moles of \(LiOH\) are required to react with 1 mole of \(CO2\), then 2 x 0.579 mol = 1.16 mol of LiOH is required.

Hence 1.16 moles of \(LiOH\) is required to  react completely with 25.5 g of \(CO2\).

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The functional unit is called a system.

The stomach, small intestine, and large intestine are all organs. When they work together to process food, they form a functional unit known as a system. The correct option is b.

The living body performs many functions. These functions are performed by different systems of the body. There are many systems in the body.

These systems are digestive systems, reproductive systems, circulatory systems, etc. These systems run the body and make an organism.

Here, the stomach, small intestine, and large intestine are all organs of the digestive system. Digestive system digest the food that we eat and provides us energy and removes the waste material from the excretory system, which excretes it out of the body.

Thus, the correct option is b. system.

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True. In second normal form (2NF), a relation must first be in first normal form (1NF), which means it has no repeating groups and each attribute contains atomic values.

In addition, for a relation to be in 2NF, all relation non-key attributes must be dependent on the entire primary key. If some non-key attributes are not determined by the entire primary key, then the relation is not in 2NF.
False. A relation is in 2NF (Second Normal Form) if and only if it is in 1NF (First Normal Form) and all non-key attributes are fully functionally dependent on the entire primary key, not just a part of it. This means that no non-key attributes are determined by a subset of the primary key.A relational table is in third normal form (3NF) if it is already in 2NF and every non-key column is non transitively dependent upon its primary key. In other words, all nonkey attributes are functionally dependent only upon the primary key.

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When positive hydrogen ions (H⁺) react with water (H₂O) in solution, they produce hydronium ions (H₃O⁺).

The process of positive hydrogen ions (H⁺) reacting with water (H₂O) in solution is an acid-base reaction, as the hydrogen ions are acidic and the water acts as a base. The process of producing hydronium ions (H₃O⁺) are

1. Positive hydrogen ions (H⁺) are introduced into the solution.

2. These hydrogen ions react with water molecules (H₂O) in the solution. 3. One hydrogen ion (⁺) combines with one water molecule (H₂O) to form a hydronium ion (H₃O⁺).

4. The overall chemical equation for this reaction is H⁺ + H₂O → H₃O⁺.

So, the reaction between positive hydrogen ions and water in solution produces hydronium ions (H₃O⁺).

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Answer:

That's simple it's the caca of 54 32 x (5) b ÷ 5683jvl done so your answer is 0

To find the lower quartile (Q1) and upper quartile (Q3) of the given data set, we first determine the median, which is the middle value. Since there are 10 observations, the median is the value at the 5th position, which is 490.

To calculate Q1, we find the median of the lower half of the data set, which consists of 238, 483, 487, 488, and 489. The median of this subset is the lower quartile, resulting in Q1 = 487.

The interquartile range (IQR) is the difference between Q3 and Q1. Substituting the values, we have IQR = 507 - 487 = 20.

To calculate the lower boundary, we use the formula Q1 - 1.5 * IQR. Plugging in the values, we get LB = 487 - 1.5 * 20 = 457.

Similarly, the upper boundary is calculated as Q3 + 1.5 * IQR. Substituting the values, we find UB = 507 + 1.5 * 20 = 537.

An observation is considered an outlier if it falls below the lower boundary (457) or above the upper boundary (537).

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The statement 'reactive oxygen intermediates and reactive nitrogen intermediates produced by phagocytic cells are effective in killing invading microorganisms' is true.

Phagocytic cells are the kind of cells that consume or destroy microorganisms by producing substances that are harmful to them, according to the study of biology.

The phagocytic cells produce oxygen and nitrogen intermediates, and these intermediates are reactive enough to bind to the chemicals in the microbe and inhibit their function. The microorganism dies when its activities are impeded to the point where it is unable to carry out the fundamental functions of life. Thus, the above statement is accurate.

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The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

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Answer:

NaOH

Explanation:

Precipitation reaction can be used in wastewater treatment. When a contaminant forms an insoluble solid, then we can use this reaction to precipitate out the contaminated ions. In wastewater, a frequent presence of heavy metals can be found such as compounds of sulphide and hydroxide. So, we can add a source of hydroxide that is soluble (NaOH Or Na2S) that will result in a precipitation reaction.

Answer:

This question is incomplete. However, the completed question is below

A teacher did an experiment to show the movement of particles in solids, liquids, and gases. The experimental set-up is shown below: An inverted glass jar is shown. Small circles representing foam balls are shown inside the jar. A stretched balloon is shown tied at the mouth of the jar. A string is shown drawn out from the middle of the stretched balloon. A hand is shown pulling the drawn out string. The teacher pulled the string attached to the stretched balloon, first slowly, then fast, and finally vigorously. Which of the following is most likely correct about the pulling of the string and the corresponding state of matter being represented? (a) Gas is represented when pulled fast, solid when pulled slowly, liquid when pulled vigorously. (b) Gas is represented when pulled slowly, liquid when pulled fast, solid when pulled vigorously. (c) Solid is represented when pulled slowly, liquid when pulled fast, gas when pulled vigorously. (d) Solid is represented when pulled vigorously, liquid when pulled fast, gas when pulled slowly.

The correct answer is C

Explanation:

These question has to do with the "freedom" of particles in each state of matter. In solids, the particles are compact and do not move freely within the solid molecule hence the reason for the definite shape of solid. The particles of liquids move more freely than solid but not as much as gases, hence the reason for there free flowing nature. Particles of gases move more fast and rapidly; colliding against one another and the wall of the container.

From the above description, it can be deduced that to illustrate these particles the teacher will have to represent the particles of the solid as been moved slowly, particles of the liquid will be pulled fast and that of gas will be pulled vigorously using balloons. Thus, the correct option is C

Answer:

the correct answer is c!

Explanation:

Solid is represented when pulled slowly, liquid when pulled fast, gas when pulled vigorously.

Explanation:

Fluorine: F-

Aluminium: Al3+

Bromine: Br-

3F2 + 2AlBr3 => 3Br2 + 2AlF3

The balanced equation for the given chemical reaction can be given as

3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)

An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both sides of both the reaction have an equal balance of mass and charge.

The products and reactants of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified.

The balanced equation for the given chemical reaction can be given as

3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)

Therefore, the balanced equation for the given chemical reaction can be given as

3F\(_2\) + 2AlBr\(_3\) \(\rightarrow\) 3Br\(_2\) + 2AlF\(_3\)

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Answer:

what people experienced during a dust storm

how people reacted to a dust storm

what people did after a dust storm

Explanation:

i passed

Answer:

what people experienced during a dust storm

how people reacted to a dust storm

what people did after a dust storm

Explanation:

The decreasing order of ionization energy will be Mg >Al >P>K.

Ionization energy sometimes referred to as ionization potential, would be the amount of energy it takes to eliminate an electron from a single, isolated atom or molecule.

On moving top to bottom in the periodic table, ionization energy will decrease rapidly.

Al =13 (group 3)

P =15 (group 5)

Mg =12 (group 2)

K =19 (group 1)

The decreasing order of ionization energy will be Mg >Al >P>K.

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0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

What is ideal gas constant ?

We simple use this formula-

The basic formula is PV = nRT where. P = Pressure in atmospheres (atm) V = Volume in Liters (L) n =  of moles (mol) R = the Ideal Gas Law Constant.

68F = 298.15K

V = nRT/P = 0.2 * 0.08206 * 298.15K / (745/760) = 4.992Liters

n = PV/RT = 1.1atm*4.992L/(0.08206Latm/molK * 306K)

n = 0.219 moles

Therefore, 0.219 moles moles are present in the flask when the pressure is 1.10 atm and the temperature is 33˚c.

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The volume of propane sample at STP condition will be 51.2 L which can be determined by ideal gas equation.

We know that from ideal gas equation,

PV= nRT

Pressure is P.

Volume is V. (in Liters)

n is the number of moles

the gas constant R, and the temperature T which is in Kelvins

Given,

P= 821 torr

T= 294 K

V= 46.8 L

Also,

n=  PV/ RT

n= 821× 46.8/  62.36 × 294

n= 2.095

Thus calculating volume at STP,

At STP,

P= 1 atm T= 298K

V= nRT/P

V= 2.095 × 0.0821 × 298/ 1

= 51.2 L

So, the volume at STP will be 51.2 L

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Answer: It is alloyed with lead or other metals to improve their hardness and strength. A lead-antimony alloy is used in batteries.

Explanation: Antimony (Sb) is an element that is blended in with metals such as lead to create different alloys.

Although antimony resembles a metal it has poor electircal and conductive properties and does not react chemically like a metal and is classified as semi-metallic.

The pH of a HNO3 solution with a concentration of [4.5 x 10-3] is approximately 2.35.

pH is a measure of the acidity or alkalinity of a solution and is defined as the negative logarithm (base 10) of the hydrogen ion concentration. In this case, we have a HNO3 solution with a concentration of [4.5 x 10-3]. To find the pH, we need to calculate the hydrogen ion concentration first.

The concentration [4.5 x 10-3] represents 4.5 multiplied by 10 raised to the power of -3. Therefore, the hydrogen ion concentration is 4.5 x 10-3 mol/L. Since the pH is the negative logarithm of the hydrogen ion concentration, we can calculate it as follows:

pH = -log10(4.5 x 10-3) ≈ 2.35

Therefore, the pH of the HNO3 solution with a concentration of [4.5 x 10-3] is approximately 2.35.

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Answer:

Explanation:

Inglish:

Some of the CO2 is released back into the atmosphere through plant respiration (ie plants "exhaling"). Plant-eating animals digest sugar molecules from plants for energy. During their respiration, excretion and decomposition they release some CO2 into the atmosphere.

español:(spanish)

Parte del CO2 se libera de nuevo a la atmósfera a través de la respiración vegetal (es decir, plantas "exhalando"). Los animales que comen plantas digieren las moléculas de azúcar de las plantas para obtener energía. Durante su respiración, excreción y descomposición liberan algo de CO2 a la atmósfera

Link reaction is the cellular respiration in animals. They produce carbon dioxide which is released to the air. This carbon dioxide is utilized plants for photosynthesis.  

Link reaction is composed of the glycolysis and aerobic respiration by mitochondria. In glycolysis, pyruvate molecule is decarboxylated and forms acetate. This stage produces carbon dioxide.

The pyruvate then dehydrogenate and losses its hydrogen to NAD+. The NADH formed is used to produce ATP during the process called oxidative phosphorylation.

The carbon dioxide removed by the process is taken by the green plants during photosynthesis to combine with water producing glucose which is stored as their chemical energy.

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Answer:

inner transition elements.

Explanation:

right answer

The correct order of reactivity towards electrophilic aromatic substitution is:

b.) Phenol > benzene > chlorobenzene > benzoic acid

Phenol is more reactive than benzene towards electrophilic substitution reactions due to the presence of the -OH group (hydroxyl group) attached to the benzene ring. The lone pair of electrons on the oxygen atom in the -OH group can donate electron density to the ring, making it more nucleophilic and facilitating electrophilic attack.

Benzene, although less reactive than phenol, can still undergo electrophilic substitution reactions due to its aromaticity and delocalized electron system.

Chlorobenzene is less reactive than both phenol and benzene because the chlorine atom is an electron-withdrawing group. It withdraws electron density from the benzene ring, making it less nucleophilic and less prone to electrophilic substitution.

Benzoic acid is the least reactive among the options given. The carboxylic acid group (-COOH) is an even stronger electron-withdrawing group than the chlorine atom in chlorobenzene. It further reduces the electron density on the benzene ring, decreasing its reactivity towards electrophilic substitution.

Therefore, the correct order of reactivity towards electrophilic substitution is option b.

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the complete question is:

The correct order of reactivity towards electrophilic aromatic substitution is?

a.) Benzene > phenol > benzoic acid > chlorobenzene

b.) Phenol > benzene > chlorobenzene > benzoic acid

c.) Chlorobenzene > benzoic acid > phenol > benzene

d.) Benzoic acid > chlorobenzene > benzene > phenol

Answer:

Number of neutrons of Al²⁷₁₃ = 14

Number of neutrons of Pt¹⁹⁵₇₈= 117

Number of neutrons of Co⁵⁹₂₇= 32

Number of neutrons of Ag¹⁰⁸₄₇= 61

Number of neutrons of Au¹⁹⁷₇₉ = 118

Explanation:

We know that atomic number of an atom is number of electron or protons while atomic mass is sum o number of neutrons and and protons.

Shorthand notations of given elements:

Al²⁷₁₃

This notation shows that atomic number of Al-27 is 13 and atomic mass is 27.

Number of neutrons of Al²⁷₁₃  = 27 - 13

Number of neutrons of Al²⁷₁₃ = 14

Pt¹⁹⁵₇₈

This notation shows that atomic number of Pt-195 is 78 and atomic mass is 195.

Number of neutrons of Pt¹⁹⁵₇₈  = 195 - 78

Number of neutrons of Pt¹⁹⁵₇₈= 117

Co⁵⁹₂₇

This notation shows that atomic number of Co-59 is 27 and atomic mass is 59.

Number of neutrons of Co⁵⁹₂₇  = 59 - 27

Number of neutrons of Co⁵⁹₂₇= 32

Ag¹⁰⁸₄₇

This notation shows that atomic number of Ag-108 is 47 and atomic mass is 108.

Number of neutrons of Ag¹⁰⁸₄₇  = 108 - 47

Number of neutrons of Ag¹⁰⁸₄₇= 61

Au¹⁹⁷₇₉

This notation shows that atomic number of Au-197 is 79 and atomic mass is 197.

Number of neutrons of Au¹⁹⁷₇₉  = 197 - 79

Number of neutrons of Au¹⁹⁷₇₉ = 118

A pi bond is the result of the d) sideways overlap of two parallel p orbitals.

Pi bonds are bonds that occur as a result of overlapping orbitals of atoms that are not in the bond axis. Each p orbital that contributes to a pi bond has two lobes and has a node at the core.

The pi orbital can hold a maximum of two pairs of electrons. Whereas each electron in a pi bond is also called a pi electron, the pi electrons are used for double bonds or triple bonds. The 2p orbital of carbon has slightly higher energy than the sp2 orbital, so the pi bond formed from two 2p orbitals has somewhat higher energy and is slightly less stable than the sp2-sp2 sigma bond.

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Answer:

Molecules of matter such as liquid, gas and solid still move even if the energy is transferred because it isn't a hundred percent. There is still energy and the time it took to transfer that said energy would have changed its state of matter.

Explanation:

Solid -the molecules are tight together. (touching)

Liquid - the molecules are close but not touching about mid way(not to far not to close)

Gas- the molecules in gasses are far apart.

It almost always goes from solid to liquid to gas. but in extreme conditions it could be different.

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The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Nitrogen in a rigid 5 m³ tank at 120 K and 1 MPa is in a compressed and cooled state.

The nitrogen in the tank is in a compressed and cooled state. This means that the nitrogen gas has been subjected to pressure and has been cooled to a temperature of 120 K.

When a gas is compressed, its particles are forced closer together, resulting in an increase in pressure. In this case, the nitrogen gas has been compressed to a pressure of 1 MPa, which is equivalent to 10 times atmospheric pressure. This high pressure allows a larger amount of gas to be stored within the given volume of the tank.

Additionally, the nitrogen gas has been cooled to a temperature of 120 K. At lower temperatures, the kinetic energy of the gas particles decreases, causing them to move slower and exert less pressure. Cooling the gas helps to reduce its volume and increase its density, allowing more gas to be stored within the confined space of the tank.

Overall, the combination of compression and cooling enables the storage of a larger quantity of nitrogen in the given volume of the tank. This is particularly useful in various industrial applications where a large supply of nitrogen is required, such as in the food and beverage industry for preservation or in the electronics industry for inert atmospheres during manufacturing processes.

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