Which of the following is a characteristic of a strong acid?
O A. It does not conduct electricity in water.
B. It completely dissociates in water.
C. It reacts with water to form H2 gas.
O D. It increases the OH concentration.

According to the stoichiometry of the given chemical equation,2.66 moles of aluminium oxide are formed when 4 moles of oxygen reacts.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

As 3 moles  of oxygen gives 2 moles of aluminium oxide, thus, 4 moles of oxygen will give 4×2/3=2.66 moles.

Thus, 2.66 moles of aluminium oxide are formed when 4 moles of oxygen reacts.

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The ratio of the container with PHe: PAr will be given as= 12.2/1

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The ratio of PHe: PAr will be given as= 12.2/1

All pressures present in a reference system are added together to get the total pressure, or ptot. Bernoulli (see Fluid mechanics) defined this pressure as the sum of the static pressure (p), geodetic component (g, z) and dynamic pressure (pdyn), that exist in a fluid along with a stream line in a frictionless flow. The pascal (Pa), often known as kilograms per square meter per second (kg/m1s2), is the SI unit of pressure. Before 1971, pressure in SI was expressed in terms of newtons per square meter. You have static pressure, while a fluid is stationary or when you are moving with it. You would feel an equal amount of air pressure from all the sides.

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Diene is a type of organic compound that contains two double bonds between two carbon atoms.

What are Atoms?

Atoms are the smallest particle of any element that still maintains the properties of that element. Atoms are made up of a nucleus surrounded by one or more electrons. The nucleus is composed of protons and neutrons, and the electrons orbit around the nucleus. Atoms of different elements have different numbers of protons, neutrons, and electrons, which is what gives them their unique properties.

Diene is a conjugated molecule, meaning that its double bonds alternate with single bonds. Diene molecules are used in a variety of chemical reactions, including the formation of polymers and the synthesis of pharmaceuticals.

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Answer:

The new volume will be 3.67 L.

Explanation:

As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:

"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"

Boyle's law is expressed mathematically as:

P*V=k

Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1 * V1 = P2 * V2

In this case:

Replacing:

1.85 atm* 4.64 L= 2.34 atm* V2

Solving:

[tex]V2= \frac{1.85 atm* 4.64 L}{2.34 atm}[/tex]

V2= 3.67 L

The new volume will be 3.67 L.

Nitric acid has the formula HNO₃. If there are 3. 55x10²³ atoms of O in the sample, the number of moles of nitric acid is 0.589moles.

How many moles of a substance are present in a reaction is determined by comparing its mass to the mass of one mole. One mole, or Avogadro's number, is equal to the sample mass divided by the molar mass, or 6.023×10²³ moles. You can calculate the total number of atoms or molecules in a sample by dividing the number of moles by the Avogadro constant. The equation is: Number of Molecules=Atoms or Molecules /6.022×10²³.

1 mole oxygen atom contains 6.02×10²³ atoms

how many moles of oxygen contains 3.55x 10²³atoms

Moles of nitric acid = 3.55x 10²³atoms/6.02 ×10²³atoms

Moles of nitric acid = 0.589moles.

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The majority of Europeans at the time had never heard of coal, which Marco Polo described as "black stones...which burn like logs."

Initially, charcoal was utilized in the production process, which caused extensive deforestation in northern China. However, coal had fully replaced charcoal by the end of the 11th century.

They do indeed have an abundance of firewood. However, due to the massive population and the large number of bathhouses and baths that are continually being heated, it would be impossible to supply enough firewood, as everyone takes a bath at least three times each week, and in the winter, if they can, every day. Since every man of rank and means has a bathroom of his own at home, the abundance and low cost of these stones result in significant wood savings.

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Here is the Conclusion 240. Heat energy affects a substance’s intermolecular forces as the substance changes between states.

Heat energy increases during the following state changes

Solid - (melting)

Liquid -gas (evaporation)

Solid- gas (sublimation)

Heat energy decreases during the following state changes

Gas- liquid (condensation)

Liquid → solid (freezing)

Gas –solid (deposition)

An intermolecular force (IMF) (or secondary force) is the force that mediates the interaction of molecules, including electromagnetic forces of attraction or repulsion that act between atoms and other types of nearby particles, such as atoms or ions.

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The  heat energy required, in joules, to melt 5.00 x 10² grams of ice at 0.0°C. 2016.6 J.

When the temperature rises, molecules and atoms move faster and collide, creating heat generated (also known as heat energy). Thermal energy is the heat that results from heated substance's temperatures.

The following phrase may be used to determine the change in heat energy in a process like melting.

S = H * m / T

where:

S = entropy [kJ]

H = fusion heat = 3.36*10¹ [J/kg]

m = mass = 0.02 [kg]

T = temperature in kelvin = 273 [K]

S = 0.02 * 5.00 * 10² / (273 + 0)

S = 2016.6 J

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The complete question is -

Calculate the heat energy of 5.00 * 10² g of ice when it melts at 0.0°C. The heat of fusion of ice is 3.36 x 10'J/kg.

Answer:

Hey there! The nuclear symbol for an ion with a charge of +220 protons and 24 neutrons would be written as follows:

220+ 24

The symbol consists of two parts: the atomic number (220+) and the atomic mass (24). The atomic number is the number of protons in the nucleus of an atom, and it is represented by a superscript on the left side of the symbol. The atomic mass is the total number of protons and neutrons in the nucleus, and it is represented by a subscript on the right side of the symbol.

In this case, the atomic number of the ion is 220, which indicates that it has 220 protons in its nucleus. The atomic mass is 24, which indicates that it has a total of 220 protons + 24 neutrons = 244 particles in its nucleus.

________________________________________________________

Nuclear symbols are a way of writing down the important information about atoms and ions in a short and easy-to-read format. They usually consist of two parts: the atomic number and the atomic mass. The atomic number tells us how many protons an atom has in its nucleus, and the atomic mass tells us the total number of protons and neutrons. For example, the nuclear symbol for carbon is 6 12C, which tells us that carbon has 6 protons and 12 particles (6 protons + 6 neutrons) in its nucleus.

To determine the number of protons in an atom or ion, we can look at its atomic number, which is usually written as a superscript on the left side of the nuclear symbol. For example, if the nuclear symbol for an atom or ion is written as 6 12C, we can tell that it has 6 protons. To determine the number of neutrons, we can subtract the atomic number from the atomic mass. For example, if the atomic mass is 12 and the atomic number is 6, then the number of neutrons is 12 - 6 = 6. To determine the number of electrons, we can just look at the overall charge of the atom or ion. If it is neutral, then it will have the same number of protons and electrons. If it is positive or negative, then it will have more or fewer electrons than protons, respectively.

In addition to respiration, a process known as guttation involves the loss of liquid water from a plant's healthy leaf or stem, mostly through water stomata.

The physiological loss of water . water of water vapor, mostly from the stomata of leaves, but also by evaporation first from surfaces of leaf tissue, flowers, and stems, is known as transpiration.

Additionally, by providing evaporative cooling, vegetation transpiration makes a major contribution to the energy balance of the leaf. Additionally, transpiration speeds up the movement of nutrients and water from roots to the shoots. Transpiration occurs when water vapor leaves a plant through the stomata.

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The volume of the cube that is submerged in the liquid would be 36.0 ml.

Submerged refers to something that is completely covered or surrounded by a liquid, usually water. Submerged objects are often completely or partially underwater, and can refer to anything from a submerged shipwreck to a submerged rock formation. Submerged objects can also refer to objects that are partially or totally surrounded by the water or liquid, such as a submerged tree or submerged vegetation. Submerging can also refer to objects that are pushed underwater or forced down due to pressure, such as a submarine. Submerging can also refer to a process in which an object is submerged and then brought back up, such as in underwater welding or archaeological excavations.

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The methods used to monitor a reaction as it occurs in the reaction flask are d) all the above

A polarimeter is an analytical hardware component that measures the polarization of light and is used to analyze the optical activity of chemicals. Optical activity refers to the ability of a material to rotate polarized light and the extent to which such a phenomenon occurs.

A spectrometer is one of the scientific instrument/method used to separate and measure the spectral components of physical phenomena. A spectrometer is a broad term often used to describe an instrument that measures a continuous variable of a phenomenon whose spectral components are mixed in some way.

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The Kp of the reaction as it has been shown is 2.9 × 10^3 Option A

We know that the equilibrium constant is the constant that has to do with the ease with which the reactants that are in the system can be converted into the products. In this case we have been given the reaction equation as it has been shown in the question.

Let us all now bear in mind that the reaction ghat we have here is a gas phase reaction and since the reaction is a gas phase reaction the equilibrium constanta that has been given as K can also be written in terms of the partial pressures of the gasses that are present in the system and this ius the bed rock of the answer that we woulod give above. The Kp can now be written as a scientific notation as shown above.

Then;

kp = Kc/(RT)^∆n

Kp = equilibrium constant using pressure

Kc = equilibrium constant using concentration

R = gas constant

T = temperature

n= difference in number of moles

Kp = 0.31/(0.082 × 1173)^-2

Kp = 2.9 × 10^3

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3.88 grams of sodium azide are required to form 5.00 g of nitrogen gas.

In order to determine how many grams of sodium azide are required to form 5.00 g of nitrogen gas, we can use the balanced equation for the reaction:

2NaN3 (s) → 2Na (s) + 3N2 (g)

We can start by converting the given amount of nitrogen gas to moles:

5.00 g N2 x (1 mol N2 / 28.00 g N2) = 0.1786 mol N2

We know that the reaction produces 3 moles of N2 for every 2 moles of NaN3 that are used, so we can use the following ratio to find the number of moles of NaN3 required:

0.1786 mol N2 / 3 mol N2 = 0.0596 mol NaN3

Finally, we can convert moles of NaN3 back to grams using the molar mass of NaN3:

0.0596 mol NaN3 x (64.99 g NaN3 / 1 mol NaN3) = 3.88 g NaN3

So, 3.88 grams of sodium azide are required to form 5.00 g of nitrogen gas.

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Answer:

[tex]\boxed {\boxed {\sf 1.99 \ atm}}[/tex]

Explanation:

We are finding the pressure with a change in temperature, so we should use Gay Lussac's Law. This states that the pressure is directly proportional to the temperature. The formula is:

[tex]\frac{P_1}{T_1}=\frac{P_2}{T_2}[/tex]

The original pressure is 1.74 atmospheres and a temperature of 273 Kelvins. When the gas is heated the new temperature is 312 Kelvins, but the new pressure is unknown. Substitute all the known values into the formula.

[tex]\frac {1.74 \ atm}{273 \ K}=\frac {P_2}{312 \ K}[/tex]

Since we are solving for the new pressure, we need to isolate the variable P₂. It is being divided by 312 Kelvin and the inverse of division is multiplication. Multiply both sides by 312 K.

[tex]312 \ K *\frac {1.74 \ atm}{273 \ K}=\frac {P_2}{312 \ K}* 312 \ K[/tex]

[tex]312 \ K *\frac {1.74 \ atm}{273 \ K}= P_2[/tex]

The units of Kelvin (K) will cancel.

[tex]312 \ *\frac {1.74 \ atm}{273 }= P_2[/tex]

[tex]1.98857143 \ atm= P_2[/tex]

The original measurements have 3 significant figures, so our answer must have the same. For the number we found, that is the hundredth place.

The 8 in the thousandth place tells us to round 8 in the hundredth place up to a 9.

[tex]1.99 \ atm \approx P_2[/tex]

The new pressure is approximately 1.99 atmospheres.

At 55 °C, the equilibrium constant for this reaction is 6.68. A pharmaceutical chemist prepares 15.0 L of an initial 0.275 M acetic acid and 3.85 M ethanol solution.

Create an equation that can be solved for x by plugging the equilibrium concentrations (expressed in terms of x) into the formula for the equilibrium constant. (d) The equation from subpart (c) is cubic (it bears the formula ax3 + bx2 + cx + d = 0). In general, it is impossible to solve cubic equations in closed form. Indicate the direction (toward product or toward reactants) in which the mixture must change if it is not at equilibrium. The concentrations of SO 2 Cl 2 and SO 2 are 0.108 M and 0.052 M, respectively, in a mixture of the three gases that has reached equilibrium.

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30% of the original amount of mixture evaporated during the 10-day period.

In order to determine the percentage of the original amount of mixture that evaporated during the 10-day period, we need to first determine how much water and how much liquid chemical were present in the beaker initially.

Given that the ratio of water to liquid chemical is 3:5, we can assume that the total number of parts is 8 (3+5).

So, the original amount of water is 3 parts / 8 parts = 0.375

And the original amount of liquid chemical is 5 parts / 8 parts = 0.625

We can then use this information to determine how much of each substance evaporated each day:

2% of 40 L of water = 0.02 x 40 L = 0.8 L

5% of 40 L of liquid chemical = 0.05 x 40 L = 2 L

We can then add up the total amount of each substance that evaporated over the 10 days to find the total amount that evaporated from the beaker:

0.8 L of water evaporated/day x 10 days = 8 L

2 L of liquid chemical evaporated/day x 10 days = 20 L

Finally, we can add up the total amount of each substance that evaporated and divide by the total amount of the original mixture to find the percentage of the original amount that evaporated:

(8 L + 20 L) / (40 L + 40 L) = 0.3 or 30%

So 30% of the original amount of mixture evaporated during the 10-day period.

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Answer:

Methanol is the solvent in this solution.

Explanation:

Mixtures are the union of two or more pure substances, which can be classified as heterogeneous when the components of the mixture can be observed and homogeneous when the components cannot be observed (they are not distinguished).

When the mixtures are homogeneous, it can be said that they are chemical solutions.

In a solution you can distinguish solutes and solvent. A solute is a substance that dissolves in another with which it forms a solution. The solute is normally a solid, but it can also be a liquid or a gas. It is found in a lower proportion than the solvent in a solution.

It is called a "solvent", the element that dissolves in the other. That is, the solvent is the substance that dissolves a solute, forming a homogeneous solution. This is normally a liquid, but it can also be a solid or a gas. It is found in greater proportion than the solute in a solution.

In this case, since methanol is the component that has the greatest volume, it means that it is found in a greater proportion. So methanol is the solvent in this solution.

Answer:

Its (A) methanol

Explanation:

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An annelid can regenerate to some extent after being split in half, and in some species, you may even get two worms. However, the common earthworm only regenerates from the tail end; Every time, the head end dies.

The Washington Post reports that many earthworms can lose several segments from their head end and grow back, and that almost all worms can regrow their tails if they are amputated. However, for some worms, the likelihood of fully regenerating decreases with the number of segments removed.

Coelomic fluid, which is secreted by many earthworms, makes it easier for them to move through the soil. This fluid forms a cement-like substance that lines the burrows of some burrowing species to prevent the walls from falling down.

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The reaction would have a Kp of  3.01 * 10^34. Option B

We know that the equilibrium constant of the reaction is the value that would be able to show us how much of the reactants that have been converted to products when the reaction has attained the point of equilibrium at a given temperature.

As such we would have that;

Kp= Kc (RT)^Δn

Kp = ?

Kc = 1.22 * 10^ 33

R = 0.082

T = 301 K

Then we have that;

Kp =  1.22 * 10^ 33(0.082 * 301)^ 1

Kp = 3.01 * 10^34

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The two factors that affect the arrangement of particles in a substance are kinetic energies and intermolecular forces.

In chemistry, all the substances are composed of tiny particles which are in constant motion.

The substance which is made up of atoms, ions or molecules, all the particles possess kinetic energy and keep moving in all direction. On the other hand, intermolecular forces are also present in a substance which keeps the particles together within their boundaries and doesn't let them go far away. In this way substances maintain their shape, arrangement and properties.

In sum, two factors play a crucial role in maintaining the properties of a substance: Kinetic energy and intermolecular forces.

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Lone electron pairs are absent from the Be atom. A negative formal charge would be placed on the Be atom as a result of the double bonds existing between it and the Cl atom.

When compared to an isolated neutral atom, the number of electrons that are attached to an atom in a molecule determines its formal charge.

The octet rule is broken by B e C l 2, as the boron should be in a valence state that enables it to attach to three chlorines. However, in this molecule, the boron is joined by six electrons.

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Andrea Ghez's favorite star is known as SO-2 and it is her favorite star because this star goes around the universe in a short period. I do not have a favorite star because I do not know a lot about stars.

Andrea Ghez is female astrophysicst who was born in the United States known for being one of the few women in the world who have gotten the Nobel Prize in Physics. During her life, Andrea has studied the center of the universe, black holes and the stars. Moreover, she was known for giving a TED talk in whiich she explained about stars and black holes.

In the TED talk given by Andrea Ghez she mentions her favorite star is the  SO-2 as "it goes around in only 15 years".

I do not have a favorite star because I do not know a lot about stars, although I believe studying them is very interesting.

Note: This question is incomplete; here is the missin information:

TED Talk- Andrea Ghez

"Now, most astronomers have a favorite star, and mine today is a star that's labeled up there, SO-2. Absolutely my favorite star in the world. And that's because it goes around in only 15 years. And to give you a sense of how short that is, the sun takes 200 million years to go around the center of the galaxy"

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Answer:

[H+] is 5.62×10-9

Explanation:

can i have brainliest please

Answer:

Tho oil that Syncrude mines from the Athabasca Tar Sands contains large amounts of undesirable sulfur. To remove most of the sulfur, Syncrude uses a chemcial process known as the Claus process, which results in a low-sulfur “sweet” crude oil.

Explanation:i found this online hope it helps

The mass of the object compared to its volume

The density of an item is defined as its mass divided by its volume. Density is commonly expressed in grams per cubic centimeter (g/cm3). Remember that grams are a unit of mass and cubic centimeters are a unit of volume (the same volume as 1 milliliter).

When multiplying or dividing, the result should have the same number of significant digits as the number in the computation that has the fewest. This is the volume measurement with only two sig figs in this case, hence the density should be given as 2.9 g/cm3. The density of an item is the ratio of its mass to its volume. Density is defined as density = mass/volume, or D = m/v.

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The mass in grams of a sample of Bi with 7.35 1023 atoms should be 255 grams.

A substance's mass is measured in grams per mole, or molar mass. The molar mass of a substance can be determined, as demonstrated in this video, by adding the molar masses of the substance's constituent atoms. The substance's molar mass can then be used to determine the number of moles in the substance and converted to mass.

The molar mass of Bi is 208.98 g/mol.

1 mole Bi = 208.98 g/mol = 6.023×10²³ no of atoms

So, the mass in grams should be

mass = ( 208.98 g/mol ×7.35 × 10²³) ÷ (6.023×10²³)

mass = 255 grams.

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Taking into account the reaction stoichiometry, a amount of 5.4 moles of oxygen are necessary to react completely with 7.2 moles of hydrogen.

In first place, the balanced reaction is:

C₃H₈ + 3 O₂  → 3 CO₂ + 4 H₂

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

The following rule of three is used: If by reaction stoichiometry 4 moles of H₂ are produced by 3 moles of O₂, 7.2 moles of H₂ are produced by how many moles of O₂?

moles of O₂= (7.2 moles of H₂×3 moles of O₂)÷ 4 moles of H₂

moles of O₂= 5.4 moles

Finally, 5.4 moles of oxygen are required.

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Answer:

3 (e

Explanation:

On this scenario, the US may consume more than its PPC by specializing in cheese and swapping it for Italian tomatoes.

Italy’s cheese output is lower than that of the United States.Italy cannot consume cheese other than PPC unless these products are supplied by another nation. Through an exchange deal with Italy, the United States can enjoy tomatoes in addition to PPC. Because cheese production in the United States is substantially higher than in Italy, we may assume that the United States can offer this commodity to other nations without jeopardizing its consumption. However, tomato output in the United States is the same as in Italy, but because the United States is a larger country than Italy, tomato consumption in the country may be affected.

As a result, if tomatoes are obtained from another nation, tomato consumption in the United States may surpass the PPC of tomatoes. This may be accomplished through barter, with the United States supplying cheese to Italy and Italy supplying tomatoes to the United States.

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After solving the equation: The new volume of the balloon will be 600 cm3.

Volume is a measure of the three-dimensional space occupied by a substance or object. In chemistry, volume is most commonly measured in liters (L). It is used to measure the amount of a substance that is present. For instance, when performing a reaction, the volume of the reactants is measured to determine the molar amounts of the reactants.

This is because the volume of a balloon is directly proportional to its temperature. So when a balloon is heated, the volume increases. In this case, the balloon's temperature was increased by 30 cm, so the volume was increased by 300 cm3 (30 cm x 10 cm3, since the volume of a balloon is proportional to its temperature to the power of 3). Thus, the new volume is 600 cm3 (300 cm3 + 300 cm3).

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