a) Use the kinetic molecular theory to explain why volume and pressure are inversely related.
b) One mole of Kr and one mole of N2are placed in separate flasks having the same volume and temperature. Using the KMT,
(i) Compare the pressure of the gases in their containers
(ii) compare the rms velocities
(iii) compare the kinetic energies of the gases

Answer:

Measure of how much heat is given off when a substance is burned

Explanation:

hope this helps

a. Oxygen is the limiting reactant.b. 4.32 g Fe2O3 are formed.c. 0.96 g of excess oxygen remains after the reaction stops.

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Secondary consumers are organisms that primarily feed on herbivores or other primary consumers.

They occupy the next trophic level above the primary consumers in a food web. They obtain energy by consuming the primary consumers and play an important role in regulating the population of herbivores.

Examples of commonly observed secondary consumers include:

Carnivorous mammals: Animals such as wolves, lions, and tigers that feed on herbivores like deer, zebras, or gazelles.

Birds of prey: Species like eagles, hawks, and owls that consume small mammals, reptiles, or other birds.

Carnivorous fish: Fish like pike, barracuda, or bass that prey on smaller fish or aquatic invertebrates.

Predatory insects: Insects such as spiders, mantises, or dragonflies that feed on other insects, including herbivorous insects.

In a specific food web, the identification of secondary consumers would depend on the specific organisms present and their feeding interactions. It would be necessary to analyze the trophic relationships among the organisms in the food web to determine the secondary consumers accurately.

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The kinetic energy of the liberated electron is 1.73 x 10⁻¹⁹ J.

The total energy of the light is the sum of the kinetic energy of the electron and work function of the metal.

E = K.E + Ф

where;

The total energy of the photons of light is calculated as follows;

E = hf

where;

E = (6.626 x 10⁻³⁴) x (9.62 x 10¹⁴)

E = 6.37 x 10⁻¹⁹ J

1 eV = 1.6 x 10⁻¹⁹ J

E = 6.37 x 10⁻¹⁹ J = 3.98 eV

The kinetic energy of the liberated electron is calculated as;

E = K.E + Ф

K.E = E - Ф

K.E = 3.98 eV - 2.9 eV

K.E = 1.08 eV = 1.73 x 10⁻¹⁹ J

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A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and (c)

(a)the molecule are a type of carbohydrate (c) the carrot contains some type of sugar.

Carrot is one of the important root vegetable rich in bioactive compounds. carbohydrates are made up of carbon , hydrogen and oxygen. carbohydrates are sugar molecules. The main three carbohydrates : sugar , starches and fiber. The carrot vegetable we eat is the taproot of carrot plant. The sucrose is major transport and storage sugar but it convert into starch. Carbohydrates provides energy for living things.

Thus, A Scientist test a small section of a carrot root to determine the type of molecules were present. the results showed that the molecule contained carbon , hydrogen , and oxygen . the option d is correct (d) both (a) and( c)

(a)the molecule are a type of carbohydrate

(c) the carrot contains some type of sugar.

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Answer:

The answer is " salt".

Explanation:

Hey there!

When any acids and base react with eachother, they forms water and respective salts.

For example:

HCl + NAOH = NACl + H2O.

Hope it helps!

Answer:

Meter.

Explanation:

A foot is a American standard. Inch is also. A Mile is for a American. Kilometers are the metric. That leaves only the Meter.

Answer:you only need one to balance Fe(NO3)2 react with Pb

Explanation:

Answer:

Both are only physical changes

Based on the balanced equation, if we have 0.08 moles of Iron (Fe), we can conclude that 0.08 moles of Hydrogen (H₂) will be formed as well.

First we need to balance the chemical equation for the reaction involving Iron (Fe) and Hydrogen (H).

The reaction will be between Fe and HCl (hydrochloric acid) to produce hydrogen gas (H₂) and iron chloride (FeCl₂):

Fe + 2HCl → FeCl₂ + H₂

From the balanced equation, we can see that for every 1 mole of Fe reacted, 1 mole of H₂ is formed. Therefore, if we have 0.08 moles of Fe, we can conclude that 0.08 moles of H₂ will be formed as well.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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Answer:

X = electrons from hydrogen

O (black) = electrons from oxygen

O (red) = electrons from when it was connected to a metal atom, hence why it has a negative charge

In an acid-base reaction involving a neutral base B, the conjugate acid will be H₃O⁺. Option B is correct.

In an acid-base reaction involving a neutral base B, the conjugate acid will be formed by the addition of a proton (H⁺) to the base.

H₂O; Water (H₂O) is not a base but can act as an acid in certain reactions. It can donate a proton to form the hydroxide ion (OH⁻), making it a conjugate base rather than a conjugate acid.

H₃O⁺; The hydronium ion (H₃O⁺) is formed when a proton (H⁺) is added to water (H₂O). It is commonly found in aqueous acidic solutions and can act as an acid by donating a proton. Therefore, H₃O⁺ is the correct answer as it represents the conjugate acid in this acid-base reaction.

OH⁻; The hydroxide ion (OH⁻) is a base, not an acid. It accepts a proton (H⁺) to form water (H₂O) in basic solutions. OH⁻ would be the conjugate base, not the conjugate acid.

Hence, B. is the correct option.

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--The given question is incorrect, the correct question is

"In an acid-base reaction involving neutral base B, what will be the conjugate acid Select the correct answer below , A) H₂O B). H₃0 C). OH⁻."--

Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

Answer:

C

Explanation:

they are of same element but different mass no.

in chemistry language we call them isotopes

Answer:

180.6 kJ​

Explanation:

The enthalpy of reaction refers to the energy absorbed or released during a reaction. If heat is absorbed in a reaction, the enthalpy of reaction is positive. If heat is released in a reaction, the enthalpy of reaction his negative.

Since the energy absorbed when one mole of the intermediate is formed is 90.3 kJ/mol, then, when two moles of intermediate is formed, 2 × 90.3 kJ/mol = 180.6 kJ​ of energy is absorbed.

Considering the Hess's Law, the desired enthalpy is obtained through adding intermediate reactions together. (option D)

Hess's law, also called Law can also be called Law of additivity of the enthalpies of reaction, it is a useful method when it is not possible to calculate the enthalpies of reaction from the enthalpies of formation, or in reactions in which the reaction enthalpy cannot be determined experimentally because it is very slow or very explosive.

Hess's law states that when reactants are converted to products, the enthalpy change is the same whether the reaction takes place in one step or in a series of steps.

In this way, Hess's Law determines that when a chemical reaction can be expressed as an algebraic sum of other reactions, its reaction enthalpy is equal to the sum of the enthalpies of the partial reactions. In this way, it allows thermochemical equations to be treated as algebraic equations, and can be added, subtracted, or multiplied by a number to find the desired thermochemical equation.

Hess's Law states that the sum of the ∆H of each stage of the reaction will give us a value equal to the ∆H of the reaction when it occurs in a single stage.

That is, the desired enthalpy is obtained through adding intermediate reactions together. (option D)

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As a result, they are more susceptible to attack by nucleophiles that can replace one of the substituents on the ring. For example, halogens, nitro groups, and alkyl groups can all be substituted onto the benzene ring of an aromatic hydrocarbon through a substitution reaction.

The general characteristics and behavior of aromatic hydrocarbons are correctly described by the following options:i. They are unsaturated compoundsii. They tend to undergo substitution reactions.Explanation:Aromatic hydrocarbons are organic compounds that contain at least one benzene ring in their structure. They are cyclic, planar, unsaturated, and follow Huckel’s rule. Huckel’s rule states that an aromatic compound must contain a planar, cyclic, and fully conjugated pi-electron system with 4n+2 pi electrons, where n is any integer. These electrons form a delocalized pi-electron cloud above and below the plane of the ring. This cloud is responsible for the aromaticity of the compound, which gives it its stability and unique reactivity.Aromatic hydrocarbons are unsaturated compounds because they contain double bonds between some of their carbon atoms. These double bonds are part of the conjugated pi-electron system that gives the compound its aromatic character. Aromatic hydrocarbons tend to undergo substitution reactions because the pi-electron cloud above and below the plane of the ring makes the carbon atoms more electrophilic. As a result, they are more susceptible to attack by nucleophiles that can replace one of the substituents on the ring. For example, halogens, nitro groups, and alkyl groups can all be substituted onto the benzene ring of an aromatic hydrocarbon through a substitution reaction.

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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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Answer: 3.2

Explanation:

Answer:

element:a,c

compound:f

mechanical mixture

solution:b

colloid:e

suspension:d

Explanation:

Answer:

To determine whether a substance is an acid or a base, count the hydrogens on each substance before and after the reaction. If the number of hydrogens has decreased that substance is the acid (donates hydrogen ions). If the number of hydrogens has increased that substance is the base (accepts hydrogen ions

There are 0.235 moles of salt in 13.8 g of chloride of sodium.

Moles and grams are related by the molecular weight of a compound.

The molecular weight of a substance is the sum of the atomic weights of all the atoms present in its chemical formula. For chloride of sodium, NaCl, the atomic weight of Na is 23.0 g/mol, and the atomic weight of Cl is 35.5 g/mol.

The molecular weight of NaCl is, therefore, 58.5 g/mol.

To calculate the number of moles in 13.8 g of NaCl, we need to divide the mass of the substance by its molecular weight. 13.8 g / 58.5 g/mol = 0.235 moles of NaCl.

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Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The new volume of the balloon is V2 = 180 atm. The ideal gas law can be used to calculate the volume of a gas if the pressure, temperature, and number of moles are known.

This equation is PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature. In this case, the initial pressure is 1.0 atm, the temperature is 25° C, and the number of moles is unknown. However, the initial volume is known, so the equation can be rearranged to solve for n:

V1P1=nRT

n=V1P1/RT

n=(240 atm1.0 atm)/(8.314 J/(molK)*298 K)

n=7.7 moles

The new volume of the balloon can then be calculated using the ideal gas law:

P1V1=P2V2

1.0 atm * 240 atm = 0.75 atm * V2

V2 = 180 atm

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There are  1.51 * 10^23 particles

To get the number of particles from the number of moles, you can use Avogadro's number, which is the number of particles in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

To convert the number of moles to the number of particles, you can multiply the number of moles by Avogadro's number. Mathematically, this can be expressed as:

number of particles = number of moles x Avogadro's number

Given that;

1 mole would contain 6.02 * 10^23 particles

0.25 mol = 0.25 *  6.02 * 10^23 particles/ 1 mole

= 1.51 * 10^23 particles

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