a certain acetic acid solution has . calculate the volume of 0.0838 m required to reach the equivalence point in the titration of 20.0 ml of the acetic acid solution.

Answer:

Wegener's theory was primarily rejected since he offered no explanation for how the continents might move.

Explanation:

The theory also went against many ideas widely accepted in the community.

If a sodium citrate sample for coagulation is noted to be filled an inch below the fill line, then the specimen is considered unacceptable for coagulation studies. It alters the properties of blood.

Blood coagulation (clotting) is a natural process by which blood cells form a gel known as a blood clot.

The blood clot generates a protective barrier against the entry of harmful substances inside the body.

Sodium citrate can be used in coagulation studies because blood factors V and VIII are relatively more stable in media that contain this substance.

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The mass of the silver chloride precipitate produced is  7.15 g.

We know that it is possible for a precipitate to be formed when we have to combine two reactants that are in the aqueous phase and the combination of these reactants in the aqueous phase do have to give rise to a product that is solid.

We know that the reaction is 1:1 and we have to find the limiting reactant and use that to find the mass of the precipitate.

Number of moles of sodium chloride = 50/1000 L * 1

= 0.05 moles

Number of moles of silver nitrate = 50/1000 L * 2

= 0.1 moles

The limiting reactant here is sodium chloride.

Mass of the precipitate = Number of moles * molar mass

= 0.05 moles * 143 g/mol = 7.15 g

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Answer:

Biology

Explanation:

Biology is the study of all living beings. From the smallest algae or micro organism to the biggest living being is all covered under biology. How micro organisms live, how do they function and how they affect other living beings is studied in biology.

Answer:

Micro bioligist

Explanation: hope this helps

The mass of the reactant during the reaction base on the law of conservation of mass is 27.50 grams

The law of conservation of matter states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another. Thus, the total mass of reactants must equal to the  total mass of the product obtained in a chemical reaction.

Now, we shall obtain the mass of the reactants during the reaction. Details below:

Iron + sulfur -> Iron sulfide

Mass of iron + mass of sulfur = Mass of iron sulfide

Mass of iron + mass of sulfur = 27.50

Thus, we can conclude from the above calculation that the mass of reactants is 27.50 grams

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London dispersion and dipole-dipole interaction make up the bulk of the intermolecular forces in ethyl acetate liquid.

Hexane, an alkane having a straight chain and six carbons but no double or triple bonds, is represented by the chemical formula C6H14. The only intermolecular forces that exist between this molecule and other molecules are London-dispersion forces, which are the least powerful intermolecular forces that exist between any two molecules.

Due to the fact that C=O, ethyl acetate is a polar substance. Additionally, because C-O bonds are polar, their bond dipole moments do not cancel one another out.

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Answer:

30000

Explanation:

6/100×500000 =30000

The typical melting point range for a pure compound can vary depending on the specific compound and its purity. However, in general, the melting point range for a pure compound is relatively narrow. It is typically within a few degrees Celsius or even less.

The melting point of a compound is a characteristic physical property that reflects the temperature at which a solid substance changes into a liquid state. The melting point range is defined as the temperature range over which the compound transitions from a solid to a liquid. It is influenced by factors such as the strength of intermolecular forces, molecular structure, and purity of the compound.

Impurities or variations in the compound's composition can widen the melting point range. A pure compound will have a more precise and narrow melting point range compared to a sample containing impurities or mixtures of compounds. The presence of impurities can introduce additional phases or alter the melting behavior, resulting in a broader range of temperatures over which the compound transitions from solid to liquid.

In summary, the typical melting point range for a pure compound is relatively narrow, usually within a few degrees Celsius, but the presence of impurities can widen the range.

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Answer:

Action given and reaction taken

Also known as

Newton's third law of motion

Explanation:

An action will be done such as bouncing a ball on the wall

- You throw the ball (Action)

- The ball bounces back (Reaction)

Hope this Helps

The answer is

153.7kJ.

The total energy needed for the water molecules to transition from ice to water and subsequently from water to vapor is what you are asked to calculate.

In order to do this, you'll need to know:

Heat of fusion of water:  ΔHf = 334J/g;

Heat of fusion vaporization of water: ΔHv = 2257J/g;

Specific heat of ice: c = 2.09J/g∘C;

Specific heat of water: c = 4.18J/g∘C;

Specific heat of steam: c = 2.09J/g∘C;

So, the following steps describe the overall process:

1. Calculate the amount of heat needed to raise the ice's temperature from − 15.0∘C to 0∘C:

q1 = m ⋅ Cice ⋅ ΔT = 50.0g ⋅ 2.09J/g⋅∘C ⋅ (0∘C−(−15∘C)) = 1567.5J

2. Calculate the amount of heat needed to convert 0∘C ice to 0∘C water:

q2 = m⋅ ΔHf = 50.0g ⋅ 334J/g = 16700J

3. Calculate how much heat is needed to evaporate water at 0∘C to water at 100∘C:

q3 = m ⋅ Cwater ⋅ ΔT = 50.0g ⋅ 4.18J/g⋅∘C ⋅ (100∘C−0∘C) = 20900J

4. Calculate the amount of heat needed to convert 100∘C water to 100∘C vapor:

q4 = m ⋅ ΔHv = 50.0g ⋅ 2257J/g = 112850J

5. Identify the heat needed to transition from 100∘C vapor to 120∘C vapor:

q5 = m ⋅ Cvapor ⋅ ΔT = 50.0g ⋅ 2.09J/g⋅∘C ⋅ (120∘C−100∘C) = 2090J

Therefore, the total heat required is

qTOTAL = q1 + q2 + q3 + q4 + q5 = 152696.5J = 153.7kJ

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By taking into account the different seating possibilities for the biologists, chemists, and physicists, you will find that the total number of valid seating arrangements is indeed 32.

Your approach is incorrect because it does not consider all possible arrangements that satisfy the given conditions. Let's analyze your approach step by step.

You correctly start by seating one biologist, which can be done in 1 way. However, when you proceed to seat the second biologist, you assume that there are 3 choices. This is where the error occurs.

Consider the following possibilities:

If the first biologist is seated at Chair 1, the second biologist cannot be seated at Chair 2 or Chair 6, as they would be sitting next to each other. Therefore, the second biologist can only be seated at Chair 4.

If the first biologist is seated at Chair 2, the second biologist can only be seated at Chair 5.

If the first biologist is seated at Chair 3, the second biologist can only be seated at Chair 6 or Chair 1.

If the first biologist is seated at Chair 4, the second biologist can only be seated at Chair 1.

If the first biologist is seated at Chair 5, the second biologist can only be seated at Chair 2.

If the first biologist is seated at Chair 6, the second biologist can only be seated at Chair 3.

So, there are actually 6 different arrangements for seating the two biologists.

Now, if we continue with your approach, seating the chemists and physicists, we need to consider the additional possibilities that arise due to the constraints of the biologist's seating arrangements.

Therefore, the correct approach would involve considering all possible arrangements that satisfy the given conditions. By taking into account the different seating possibilities for the biologists, chemists, and physicists, you will find that the total number of valid seating arrangements is indeed 32.

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Answer:

shell ,orbit , this is the answer of this qn

When an air and fuel mixture has more gas than what is required for efficient combustion, a lean burn results.The ideal combustion ratio for burning propane entirely is 1 part propane (4%) to 24 parts air (96%).

If the area has a cold snap while your propane tank is much less than 20% full, you may run out of propane faster than you expect.If there isn't any propane, your house won't be warm.Without heat, your home is dangerous and uncomfortably cold.Additionally, it's possible for your pipes to freeze or explode.

Yes, they could, although this usually only applies to the portable, 20-lb grilling tanks, not the larger ones.A warm summer day can easily raise temperatures.Even as the portable propane tank warms up, the pressure will rise.

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The more thermal energy that is added to a substance, the faster the particles move and the more space they occupy (they spread apart). The more thermal energy that is taken away from a substance, the slower the particles move and the less space they occupy (they become closer together).

I hope this helps!

the components are mixed are uniformly distributed throughout the mixture, then that type of mixtures is known as a homogenous mixture.

In most technical applications, homogeneous refers to a system's qualities being constant throughout the entire system, while heterogeneous (sometimes called inhomogeneous) refers to a system's properties changing within it. Any system with two phases, such as ice and water, is referred to as heterogeneous.

A combination is considered homogeneous when the ingredients are thoroughly combined and dispersed across the entire mixture. These mixes are homogeneous throughout and include only one phase of substance.

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The orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

To find the orbital period (P) of an asteroid with a given semi-major axis (a), we can use Kepler's third law:

a³ = P²

Given that the semi-major axis (a) is 73.4 AU, we can substitute this value into the equation and solve for the orbital period (P):

(73.4 AU)³ = P²

(73.4)³ AU³ = P²

P² = (73.4)³ AU³

Taking the square root of both sides:

P = sqrt((73.4)³) AU

Using a calculator to evaluate the expression, we find:

P ≈ 1652.0 AU

Therefore, the orbital period of the asteroid, carried out to 4 significant digits, is approximately 1652.0 years.

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The partial pressure of oxygen in his lungs will be 108 kPa.

The correct option is C.

The partial pressure of oxygen is 21.39 kPa. The correct option is B.

The number of moles of oxygen that you take in is 4.845 moles.

The pressure of oxygen in the lungs of the diver is calculated below:

The Pressure of oxygen = 21 % * 512 kPa

The Pressure of oxygen = 108 kPa.

The partial pressure of oxygen = Total pressure -  partial pressure of water vapor

The partial pressure of oxygen = 22 kPa - 0.61 kPa

The partial pressure of oxygen = 21.39 kPa

The number of moles of oxygen taken in, n = PV/RT

n = 1000 * 12 / 8.31 * 298

n = 4.845 moles

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Answer:

108 kPa.

Explanation:

According to the given statement 70%  is the percent yield of Compound C.

A composite is a material made of two maybe more components. Examples of compounds includes carbon dioxide, water, and table salt.

According to the information provided, a reaction that results in the production of Compound C uses 2.5 g of Compound A and 6.0 g of Compound B. We can presume that the mass of A and B that are both entirely consumed to form C has been calculated using the limiting reactant.

The sum of a masses of the reactants equals the total of the masses of the products according to the rule of mass conservation. so:

Theoretical yield

= sum of the reacting masses

Theoretical yield  = (2.5 + 6.0) g

Theoretical yield  = 8.5g

Percentage yield

= (actual yield/theoretical yield) * 100%

Percentage yield = (6.0 g / 8.5 g) * 100%

Percentage yield = 70%

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Answer:

Answers are in the explanation

Explanation:

Based on the reaction:

CF₄ + 2Br₂ → CBr₄ + 2F₂

The mole ratio of CF₄ is:

CF₄:Br₂ = 1:2

CF₄:CBr₄ = 1:1

CF₄:F₂ = 1:2

Moles F2:

Molar mass CF₄: 88.0g/mol

57.0g * (1mol / 88.0g) = 0.6477 moles CF₄ * (2mol F₂ / 1mol CBr₄) =

Mass Br2:

Molar mass CBr₄: 331.63g/mol

250.0g * (1mol / 331.63g) = 0.7539 moles CBr₄ * (2mol Br₂ / 1mol CF₄) =

1.51 moles Br₂ * (159.808g / mol) =

Moles F2:

4.8 moles CF₄ * (2mol F₂ / 1mol CF₄) =

Answer:

Shifts to the left

Explanation:

Usually when adding HCl to a system it reduces stress causing the equilibrium to go to the left

Complete Question:

In ∆ABC, if sin A = 4/5 and tan A = 4/3, then what is cos A?

Answer:

\(cos A= \frac{3}{5}\)

Explanation:

Given

\(sin A = 4/5\)

\(tan A = 4/3\)

Required

\(cos A\)

In trigonometry;

\(tanA = \frac{sinA}{cosA}\)

Multiply both sides by cosA

\(cos A * tanA = \frac{sinA}{cosA} * cos A\)

\(cos A * tanA = sinA\)

Divide both sides by tanA

\(\frac{cos A * tanA}{tanA} = \frac{sinA}{tanA}\)

\(cos A= \frac{sinA}{tanA}\)

Substitute values for sinA and tanA

\(cos A= \frac{4/5}{4/3}\)

\(cos A= \frac{4}{5} / \frac{4}{3}\)

\(cos A= \frac{4}{5} * \frac{3}{4}\)

\(cos A= \frac{4 * 3}{5 * 4}\)

\(cos A= \frac{3}{5}\)

The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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Comparing the electronegativities of the two elements is one method of predicting the type of bond that will form between them.

Ionic bonds are produced between atoms of metals and non-metals where the metal loses an electron to complete its octet and the non-metal acquires that electron to complete its octet. Covalent bonds are formed when two atoms share electrons to complete their octets.

Ionic chemicals are bound together by ionic bonds, whereas covalent compounds are held together by strong covalent bonds. While covalent molecules are normally insoluble in water, ionic compounds are. Additionally, covalent molecules are typically more flammable than ionic ones.

If the electronegativity of the two atoms differs by enough to allow one to totally draw an electron away from the other, the connection is ionic.

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Answer:

The cell membrane is, The thin membrane that forms the outer surface of the protoplasm of a cell

Answer:0.100

Explanation:

The SQL query below retrieves all the data in the PRODUCT table.SELECT * FROM PRODUCT;

SQL stands for Structured Query Language and is a programming language used to manage relational databases. SQL is used to execute a variety of operations on a database, such as inserting data, updating existing data, and deleting data.

SQL is used to communicate with a database and is the standard language for managing databases. SQL is used to interact with databases such as MySQL, Oracle, MS SQL Server, SQLite, etc.

PRODUCT is the name of a table in a database that stores product information. The PRODUCT table contains information about a company's products, such as product codes, names, descriptions, and prices. SQL is used to perform operations on the PRODUCT table such as SELECT, INSERT, UPDATE, and DELETE.SQL QueryThe SQL query to select all data in the PRODUCT table is:SELECT * FROM PRODUCT; the

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Sorry this question is incomplete.

Answer:

Helium is stable because it has 1 shell and the first shell can only have 2 electrons. Hydrogen is unstable because it has 1 shell but only 1 electron.

The variance in the US continental region is brought on by the shift in daytime and nighttime weather patterns.

Cold, dry, and stable air masses are found in the continental polar (cP) or continental arctic (cA) regions. Radiative cooling causes these air masses to form over northern Canada and Alaska. They travel south, then east via the Plains and the Rockies.

During the winter, a continental polar air mass can develop over the land. It comes from northern Canada or Alaska in the Northern Hemisphere. It transports dry weather to the United States as it goes south. Low humidity and temperature are both present.

These factors contributed to the polar air mass:

During the colder months of the year, continental polar air typically forms over vast land masses.

A cool breeze blows across the upper section of the area, while a warm breeze blows through the lower part.

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