If 3.9 moles of propane are at a temperature of 48oC and are under 150.2 kPa of pressure, what volume does the sample occupy?

your answer will be Carbon

I just got help from a friend!

Answer:

39

Explanation:

Total protons + total neutrons = mass number

Answer:B

Explanation:

The summary which expresses the main points of the Gravitational force best is the second one.

Gravitational force is a attraction force which is present between two objects and represented as:

F = gm₁m₂ / r², where

g = gravitational constant

m₁ = mass of one object

m₂ = mass of another object

r = distance between two objects

Because of gravity all objects will have a accurate position and particular order.

Hence second paragraph expresses best.

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Explanation:

The claim that hydrogen chloride (HCl) would be much stronger than nitric acid (HNO3) due to opposing dipole forces is incorrect.

Both HCl and HNO3 are strong acids, meaning that they dissociate completely in water to produce H+ ions. The strength of an acid is determined by the degree to which it dissociates in water. In other words, the stronger the acid, the more H+ ions it produces in water.

The dissociation of HCl and HNO3 in water can be represented as follows:

HCl + H2O → H+ + Cl-

HNO3 + H2O → H+ + NO3-

As we can see, both HCl and HNO3 produce H+ ions in water. Therefore, the strength of an acid cannot be solely determined by its dipole forces.

In addition, it's important to note that HCl is a much more volatile and corrosive acid than HNO3. It can cause severe respiratory and skin irritation when it is inhaled or comes into contact with skin. Therefore, switching HNO3 for HCl could be dangerous and should not be done without proper precautions and expert knowledge

Straight-chain alkane undecane has 11 Carbon atoms in it.

10 carbon atoms and 22 hydrogen atoms are covalently linked together to form the hydrocarbon decane. Decane is a member of the enormous organic family known as alkanes. The only atoms in the hydrocarbon molecules of the alkane family are carbon and hydrogen.

Consequently, the alkyne with 16 hydrogen atoms has the formula C9H16 C 9 H 16. Alkenes are hydrocarbons with a double bond connecting the carbon atoms. Their usual formula is CnH2n, or C n H 2 n. 2n = 44, where n is the number of hydrogen atoms.

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The higher temperature will be:

As the temperature is increased from 22°C to a higher temperature, the rate constant increases by a factor of 7.00. The final temperature will be 271.74K.

What is the activation energy?

Activation energy is defined as the extra energy provided required to activate the molecules to start reacting and forming intermediate and later product.

Arrhenius equations given the relation rate constant and activation energy.

\(LnK=Ae^{-\frac{E_a}{RT}\\\\\)

Where,

K= Rate constant

A= Pre exponential factor

\(E_a=\) Activation energy

When two rate constants are given \(K_1\,\) and \(\,K_2\)

\(ln\frac{K_2}{K_1}=\frac{E_a}{R}(\frac{1}{T_2}-\frac{1}{T_1})\)

Given,

\(T_1\) = 22°C = 295K

Rate constant\((K_1)\) increases by a factor of 7,i.e, \(K_2=7K_1\)

\(E_a\)= 54 kJ/mole = 54000 J/mole

R= 8.314 \(J\,mol^{-1}K^{-1}\)

Putting the values,

\(ln\frac{K_2}{K_1}=\frac{E_a}{R}(\frac{1}{T_2}-\frac{1}{T_1})\)

ln 7 x 8.31454000 = (1/\(T_{2}\\\) - 1/295)

0.299 x \(10^{-3}\) + 1/295 = 1/\(T_{2}\)

0.00368 = 1/\(T_{2}\)

\(T_{2}\) = 1/0.00368

\(T_{2}\) = 271.74 K

Therefore,

The increase in temperature will change from 295K to 271.74K.

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If 5/8 of a number is 80, we can start by setting up the equation:

5/8 x N = 80

where N is the number we are trying to find.

To solve for N, we can isolate it by multiplying both sides of the equation by 8/5:

N = 80 x 8/5

N = 128

Therefore, the number is 128.

To find 1/4 of the number, we can simply multiply the number by 1/4:

1/4 x 128 = 32

So, 1/4 of the number is 32.

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C = m V . The unit of concentration is typically given as g/mL because the solute mass is frequently given in grammes and the volume is frequently given in milliliters. However, there are a tone of other mass and volume unit combinations that are possible.

Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.

A solution's concentration is an indicator of how much solute has dissolved in a specific volume of solvent or solution. When there is a significant amount of dissolved solute in a solution, it is said to be concentrated. When a dissolved solute is present in a solution, it is said to be diluted.

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Kinetic Energy Statement

Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.

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The sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

The force exerted by a gas on specific area is known as gas pressure..

As we know, (P₁ V₁) /(T₁) = (P₂V₂) /(T₂)

Given, P₁ is the initial pressure (452 torr); V₁ is initial volume (32.2 mL)

T₁ is initial temperature in Kelvin (30 °C + 273.15 = 303.15 K)

P₂ is final pressure (452 torr); V₂ is final volume (what we want to find)

T₂ is the final temperature in Kelvin (-70 °C + 273.15 = 203.15 K)

Now, V2 = (P₁ V₁ T₂) / (P2 T₁)

V₂ = (452 torr x 32.2 mL x 203.15 K) / (452 torr x 303.15 K)

V₂ ≈ 18.5 mL

Therefore, the sample of oxygen will occupy approximately 18.5 mL at -70 °C and the same pressure.

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The correct option is (B) Addition of an inert gas to the reaction mixture.

A gas is considered to be inert if, under a specific set of circumstances, no chemical reactions occur.

Does the addition of a inert gas change concentration?

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I understand that the question you are looking for is "which of the following changes in reaction condutions will not alter the equilibrium concentrations?"

(A) Decreasing the pressure or volume

(B) Addition of an inert gas to the reaction mixture

(C) Addition of reactant or products

(D) Increasing the temperature"

The chemical formula that represents a polyatomic ion is ClO⁻.

A polyatomic ion is an ion consisting of three or more atoms. This differentiates polyatomic ions from monatomic ions, which contain only one atom.

Examples of polyatomic ions are as follows:

According to this question, ClO⁻ is an example of polyatomic ion because it contains two atoms namely;

Therefore, ClO⁻ is the polyatomic ion.

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In Groups 1 and 2 of the periodic table, the melting points of metals generally decrease as you move down the group. This trend is known as a general pattern in the relationship between a metal's position in these groups and its melting point.

Group 1 consists of alkali metals (Li, Na, K, etc.), and Group 2 consists of alkaline earth metals (Be, Mg, Ca, etc.). As we move down these groups, the number of electron shells increases, and the atomic radius of the metals also increases. This increase in atomic radius leads to weaker metallic bonding between the atoms.

The melting point of a metal is influenced by the strength of the metallic bonds. Metallic bonding occurs when metal atoms share their outer electrons freely, forming a "sea" of delocalized electrons. These delocalized electrons are responsible for the high electrical conductivity and malleability of metals. The stronger the metallic bonding, the higher the melting point of the metal.

As we move down Groups 1 and 2, the increased atomic radius results in a greater distance between the metal ions in the crystal lattice. This increased distance weakens the metallic bonding, making it easier to break the bonds and convert the solid metal into a liquid state. Therefore, metals lower in Groups 1 and 2 have lower melting points compared to metals higher up in the groups.

Additionally, the increased number of electron shells also leads to greater shielding of the outer electrons from the positive charge of the nucleus. This reduced attraction between the outer electrons and the nucleus further contributes to the weaker metallic bonding and lower melting points as we move down the groups.

In summary, the general pattern in the relationship between a metal's position in Groups 1 and 2 and its melting point is that the melting points decrease as we move down the groups due to the increasing atomic radius, weaker metallic bonding, and reduced attraction between the outer electrons and the nucleus.

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205–316: Rational Number V64: Irrational Number Rational Number 5 (4V5 - 355): Irrational Number 573 - V3: Irrational Number 2V3: Irrational Number 77-V147: Irrational Number.

V42: Irrational Number 168 Please be aware that irrational numbers are denoted by the symbol "V," which stands for "square root of," the equations are simplified, and the outcomes are not precise values; rather, they are categorized as rational or irrational based on their mathematical characteristics.A real number that cannot be represented as a repeating or terminating decimal, as well as a ratio of integers (i.e., as a fraction), is said to be irrational. In other words, a number that is irrational cannot be expressed as a finite fraction or a finite decimal.The ratio of a circle's circumference to its diameter, or pi, is the most well-known example of an irrational number. Due to its inability to be represented, it is an irrational number.

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Answer: true

Explanation: The hydrochloric acid is the strong acid used in a labratorical experiments

But in other wise ethanoic acid

Is a weak acid used in day to day activities.

Answer:

I think A.

Explanation:I say A because of the substance melting the quicking does have the highest melting point because its the highest.

A real-life situation where multiplication and division of polynomials needs to be solved could be the following:

Tom is a carpenter and he needs to calculate the volume of a cuboid-shaped object he is constructing. The object has a length of 5x^2 + 6x - 2, a width of 3x - 2, and a height of 4x + 1. Tom needs to calculate the total volume of the object and rate his work with the rubric provided.

The volume of the object can be calculated by multiplying the length, width, and height together:

(5x^2 + 6x - 2)(3x - 2)(4x + 1)

The total volume can be simplified to 60x^3 + 4x^2 - 18x - 10. Tom can then use the rubric provided to rate his work.

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Answer:

Scandium (Sc)

Explanation:

Cr³⁺ is a chromium atom that has lost 3 electrons. A chemical specie becomes positively charged when the number of electrons is lower than the number of protons.

 In this regard, the number of protons is more.

Chromium originally has 24 electrons, on losing 3 electrons it will now have 21 electrons.

The atom with 21 electrons in its neutral state is scandium

a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer:

REGULATOR - A device which controls the flow of current or voltage in a circuit to a certain desired level. RELAY - An electrical coil switch that uses a small current to control a much larger current. RELUCTANCE - The resistance that a magnetic circuit offers to lines of force in a magnetic field.

Explanation:

Answer:

True

Explanation:

The correct statement about pericyclic reactions is:

In pericyclic reactions, all bonds are broken and formed in a single step.

Pericyclic reactions are a class of organic reactions characterized by the simultaneous breaking and forming of multiple bonds in a concerted manner, meaning that all bond changes occur in a single step. This is in contrast to stepwise reactions where bonds are broken and formed in separate steps.

In a pericyclic reaction, the reactants rearrange their electrons in a concerted fashion, leading to the formation of new bonds and the breaking of existing bonds. This concerted process occurs through the overlap of molecular orbitals, allowing for the efficient transfer of electrons.

Pericyclic reactions are concerted reactions in which the breaking and forming of bonds occur simultaneously in a single step. They do not involve multiple steps or intermediates. The transition state in a pericyclic reaction is cyclic, not acyclic.

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The permitted values of j for a p electron are 1/2 and 3/2 and the permitted values of j for an h electron are 9/2 and 11/2.

(a) For a p electron:
The azimuthal quantum number (l) for a p electron is 1. To calculate the permitted values of j, we use the formula:
j = l ± 1/2
So for a p electron, the permitted values of j will be:
j = 1 + 1/2 = 3/2
j = 1 - 1/2 = 1/2
Therefore, the permitted values of j for a p electron are 1/2 and 3/2.

(b) For an h electron:
The azimuthal quantum number (l) for an h electron is 5. To calculate the permitted values of j, we use the same formula:
j = l ± 1/2
So for an h electron, the permitted values of j will be:
j = 5 + 1/2 = 11/2
j = 5 - 1/2 = 9/2
Therefore, the permitted values of j for an h electron are 9/2 and 11/2.

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Answer:

Pros: Cheap, Reliable, and Abundant.

Cons: Pollution, Waste, and harmful substances

Explanation:

Pros

Cheap: it's cheaper then using other energy sources and is a lot less expensive to extract

Reliable: Coal can supply power during peak demand which means avoiding blackouts.

Abundant: there are approximately over 300 years of coal deposits still available.

Cons

Pollution: the byproducts from coal can cause a lot of pollution and can contribute to global warming

Waste: a lot of waste which can no longer be reused is generated from coal fired plants.

Harmful Substances: Coal fired plants emit harmful substances to the environment including Sulfur, Mercury, Dioxide, Arsenic and Etc.

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The given statement "the greater the concentration gradient the faster the diffusion rate t/f" is true.

The diffusion rate is influenced by several factors, one of which is the concentration gradient.

The concentration gradient refers to the difference in concentration between two regions.

When there is a greater concentration gradient, it means that the difference in concentration between the two regions is larger.

According to Fick's law of diffusion, the diffusion rate (J) is directly proportional to the concentration gradient (∆C) multiplied by the surface area (A) and the diffusion coefficient (D), and inversely proportional to the distance (x) over which diffusion occurs.

Mathematically, it can be expressed as:

J = -D * (∆C / x) * A

From this equation, it is evident that a greater concentration gradient (∆C) will result in a higher diffusion rate (J) as long as the other factors remain constant.

In summary, the statement that the greater the concentration gradient, the faster the diffusion rate is true. A larger difference in concentration between two regions leads to a higher diffusion rate.

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Answer:

high melting points.

good conductors of electricity.

good conductors of heat.

high density.

malleable.

ductile.

Explanation:

Here is ur paragraph:

Metals have many interesting properties. Metals have high melting points, for example, Gold's melting point is 1948 degrees Fahrenheit. They are also good conductors of heat and electricity. They have high density and are malleable. They are also ductile. Platinum and Gold are very widely used for these reasons.

The goal of these washes is to neutralize an organic layer that might contain traces of acidic components. These washes are composed of saturated sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) in aqueous solutions.

Sodium bicarbonate is used to extract the mixture since doing so will cause any unreacted acid to react with the sodium bicarbonate and neutralize any remaining acid. When the acid had been neutralized, the water-soluble acid would separate from the water-insoluble ester. As a result, the yield of the pure product increases.

Sodium bicarbonate, an acidifying agent, and a drying agent are all ingredients in baking powder. Starch typically serves as both the drying agent and the acidifying agent in recipes. A leavening agent is a baking powder

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