A first order reaction has rate constants of 4.6 x 10-2 s-1 and 8.1 x 10-2 s-1 at 0ºC and 20ºC, respectively. What is the value for the activation energy?
A.
0.566 J/mol
B.
2.5 x 10-4 J/mol
C.
2260 J/mol
D.
18,800 J/mol
E.
1.76 J/mol

The new volume of the gas is 832.5 ml assuming the moles of gas and temperature are held constant

Since the temperature and number of moles of gas are held constant, the pressure-volume relationship of the gas follows Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

the gas in a 275.0 ml piston experiences a change in pressure from 1.00 atm to 3.10 atm.

P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

V2 = V1 * P1 / P2

= 275.0 ml * 1.00 atm / 3.10 atm

= 832.5 ml

hence, The new volume of the gas is 832.5 ml.

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To determine how many grams of hydrogen must react to produce 31.5 grams of ammonia, we must use stoichiometry. Stoichiometry is the study of the quantitative relationships between reactants and products in a balanced chemical equation.

Ammonia is formed when hydrogen gas reacts with nitrogen gas according to the following balanced equation:N2(g) + 3H2(g) → 2NH3(g)From the balanced equation, we can deduce that three moles of hydrogen gas reacts with one mole of nitrogen gas to produce two moles of ammonia gas.

The molar mass of nitrogen gas (N2) is 28 g/molThe molar mass of hydrogen gas (H2) is 2 g/molThe molar mass of ammonia gas (NH3) is 17 g/molLet us first calculate the number of moles of ammonia formed when 31.5 grams of ammonia reacts.

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The reaction rate order for sn1 reaction rate will be CH3F < CH3Cl < CH3I. The reason for this is that the halide with the weaker nucleophile will have a higher sn1 reaction rate.

The nucleophile is a key factor in determining the rate of an Sn1 reaction. In general, the stronger the nucleophile, the faster the reaction will be. This is because the stronger nucleophile will be able to break the bond between the alkyl halide and the nucleophilic carbon more easily. For this reason, the order of increasing Sn1 reaction rate will be CH3F < CH3Cl < CH3I.

Complete Question:

List the following alkyl halides in order of increasing sn1 reaction rate. what will be the reaction rate order for sn1 reaction rate? provide your reasoning.

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The amount of heat gained by the water is 500 calories. Thus, option D is correct.

Given:

Mass of water (m) = 100 g

Change in temperature (ΔT) = 30°C - 25°C = 5°C

The specific heat capacity of water (c) is approximately 1 calorie/gram°C.

Now, the amount of heat gained by the water,

Q = mcΔT

Where:

Q is the heat gained or lost by the substance

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

Plugging in the values into the formula:

Q = 100 × 1 × 5

Q = 500 calories

Therefore, the amount of heat gained by the water is 500 calories.

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With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical.

Thus, Ammonia, the simplest pnictogen hydride and a stable binary hydride, is a colourless gas with a strong, pungent odour. It contributes considerably to the nutritional demands of terrestrial creatures by serving as a precursor to 45% of the world's food and fertilizers.

Biologically, it is a common nitrogenous waste, especially among aquatic animals.

The production of fertilizers in a variety of shapes and compositions, including urea and diammonium phosphate, uses about 70% of ammonia.

Thus, With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical.

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Answer:

Mathematical

Explanation:

It shows how to find the hypotenuse

Explanation:

Robins are born in the spring or summer and are mature birds and ready to breed in the following spring or summer. They do not mate for life. Pairs usually remain together during an entire breeding season, which can involve two or three nestings.

Since leaving the nest (fledging), it takes another 10-15 days for babies to become good fliers and individual birds. The parents continue to feed their young throughout this time.

Answer:

see image

D is the answer

Explanation:

see image

the box is like a mini multiplication table

Answer: during a chemical reaction, matter cannot be created or destroyed

Explanation:

Answer:

I think the answer is Temperature but i don't know your options so I'm just going off of my test

Explanation:

The geologists know the presence of the vast sea at Grand Canyon by the erosion and indentations.

Grand Canyon in Arizona has been the rock sediment. It has been determined to be the vast sea due to the presence of oceanic floors. The erosion of the rocks results in the formation of the land over a vast period of time.

The rock indentation results in the formation of the mountains. The rock has been indented with the force thus, there has been the oceanic force that results in the indentations.

Thus, the erosion and indentations have resulted in the formation of the Grand Canyon by a vast sea.

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In the given molecular art options, option B and F are elements and option A, C, D and E are compounds.

Elements refer to pure substances which are composed of only one type of atom. It refers to a class of substances that cannot be separated into simpler substances by chemical means. In the given molecular structures, option B and F are elements as they made up of single type of atoms. Compounds refer to substances which are formed by two or more different types of elements that are united chemically in fixed proportions. When the elements combine together, they react with each other and form chemical bonds as a result of sharing or exchanging electrons between atoms which are difficult to break. As molecular structures, option A, C, D and E are made up of different type of atoms, they are compound.

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Answer: The volume of product formed is 0.26 L

Explanation:

\(\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}\)    

\(\text{Moles of} H_2=\frac{0.02g}{2g/mol}=0.01moles\)

\(2H_2(l)+O_2(l)\rightarrow 2H_2O(g)\)

As \(O_2\) is the the excess reagent, \(H_2\) is the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of \(H_2\) give = 2 moles of \(H_2O\)

Thus 0.01 moles of \(H_2\) will give =\(\frac{2}{2}\times 0.01=0.01moles\)  of \(H_2O\)

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 101.325 kPa = 1 atm

V = Volume of gas = ?

n = number of moles = 0.01

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(40^0C=(40+273)K=313K\)

\(V=\frac{nRT}{P}\)

\(V=\frac{0.01mol\times 0.0821L atm/K mol\times 313K}{1atm}=0.26L\)

Thus the volume of product formed is 0.26 L

Answer:

the main aim of balance in an equation is making show that the total number of substances on the reactant side is equal to the total number of substances on the product side

Explanation:

so if we were to balance the equation of water water is a compound containing two molecules of hydrogen and one molecule of oxygen therefore

H+O=H2O

\(H+O_2= H_2O\)

Element | Reactant | Product

H | 1 × 4 | 2×2

O | 2 | 1 × 2

\(4H+O_2= 2H_2O\)

Answer:

D. Ionic compound

Explanation:

Just based on my opinion

Correct me if I'm wrong tnx:<

Dihydrogen monoxide is a covalent compound. Option A is correct.

Covalent compounds are compounds that are held together by covalent bonds. Covalent bonds are formed when two atoms share electrons. In dihydrogen monoxide, the two hydrogen atoms share a pair of electrons with the oxygen atom. This forms a molecule of water, which is a covalent compound.

Ionic compounds are compounds that are held together by ionic bonds. Ionic bonds are formed when one atom donates electrons to another atom. In an ionic compound, the electrons are not shared, but are transferred from one atom to another. The molecular formula for dihydrogen monoxide is H₂O.

The difference between a molecular formula and an empirical formula is that the molecular formula shows the actual number of atoms of each element in a molecule, while the empirical formula shows the simplest ratio of the atoms of each element in a molecule. Option A is correct.

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The flask will have the greatest number of collisions per second with the walls of the container is Flask A: CO at 760 torr and 0 °C.

The Collision of the molecules with the wall of the container will be  depend on the pressure. Therefore, the flask with the highest pressure have the greatest no of the collisions. As flask A has the highest pressure of 760 torr, Therefore, the flask A has the greatest number of the collusions per second with the walls of the container.

Thus the flask A with CO gas will have the greatest number of collisions per second with the walls of the container.

This question is incomplete, the complete question is :

Consider three identical flasks filled with different gases.

Flask A: CO at 760 torr and 0 °C

Flask B: N₂ at 250 torr and 0 °C

Flask C: H₂ at 100 torr and 0 °C

which flask will have the greatest number of collisions per second with the walls of the container?

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Answer:

its will be 4 (B) I m not sure hope that help

Answer:

i think it might be C if not im sorry pls give brainliest.. but yea im pretty sure its C

Explanation:

The frequency of a wave whose wavelength is 5.67 × 10-⁷m is 5.3 × 10¹⁴Hz.

Wavelength is the length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next.

The wavelength of a wave is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency as follows:

λ = v/f

Where;

The frequency is the quotient of the number of times, n, a periodic phenomenon occurs over the time (t) in which it occurs.

According to this question, a wave has a wavelength is 5.67 × 10-⁷m. The frequency can be calculated as follows:

5.67 × 10-⁷ = 3 × 10⁸/f

f = 3 × 10⁸ ÷ 5.67 × 10-⁷

f = 5.3 × 10¹⁴Hz.

Therefore, 5.3 × 10¹⁴Hz is the frequency of the wave

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The pH does not decrease drastically because the HCl reacts with the  nitrite ion present in the buffer solution is: C) nitrite ion.

In this case, nitrous acid (HNO2) and sodium nitrite (NaNO2) are used to prepare the buffer solution. The nitrous acid is a weak acid, and the nitrite ion (NO2-) is its conjugate base. The presence of both the weak acid and its conjugate base makes this solution a buffer solution.

When a small amount of HCl is added to the buffer solution, it reacts with the nitrite ion present in the solution according to the following equation:

HCl + NO2- -> HNO2 + Cl-

The HCl donates a proton to the nitrite ion, forming nitrous acid and chloride ion. This reaction consumes some of the added HCl, which prevents the pH from decreasing drastically.

Therefore, the correct answer is option C) nitrite ion.

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a. The measurements on the target do not represent accuracy well.

b. The measurements on the target represent precision fairly well.

Accuracy refers to the closeness of a measurement to the true or accepted value. Since they are off target, the measurements are not accurate.

Precision refers to the consistency and reproducibility of measurements, and in this case, the shots are clustered around certain areas, with two points in the second circle and two points in the third circle. This indicates that the person taking the shots was able to consistently hit a certain area.

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The approximate temperature of the H₂O after thermal equilibrium was reached is 23.4°C (option d).

The amount of heat absorbed by the water is given as 300.0 J. The mass of water is 50.0 g and the specific heat capacity of water is 4.2 J/g°C. Let's use the equation:

Q = m * c * ΔT

where Q is the heat absorbed, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.

Substituting the given values, we get:

300.0 J = 50.0 g * 4.2 J/g°C * ΔT

Solving for ΔT, we get:

ΔT = 300.0 J / (50.0 g * 4.2 J/g°C) = 1.43°C

The final temperature of the water can be calculated by adding the change in temperature to the initial temperature:

Final temperature = 22.0°C + 1.43°C ≈ 23.4°C

Therefore, the approximate temperature of the H₂O after thermal equilibrium was reached is 23.4°C (option d).

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The number of mole of water, H₂O present, given that 2.43 g of H₂O was vaporized is 0.13 mole

From the above question, the following parameters were obtained:

Mole and mass of a substance are related by the following formula:

Mole = mass / molar mass

Inputting the given parameters, we can obtain the mole of water, H₂O as follow:

Mole of water, H₂O = 2.43/ 18.02

Mole of water, H₂O = 0.13 mole

Thus, we can say that the mole of water, H₂O present is 0.13 mole

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Answer:

it's volume also decrease

The element iodine appears in Period 5 of the Periodic Table. This means that an iodine atom has five orbitals in its electron cloud. so the correct option is (b).

As a member of group 7, iodine possesses seven outer electrons. Since it is in the fifth period, its electrons will be in orbitals 5s and 5p. The chemical formula for iodine is 5s25px25py25pz1.

total amount of electrons that could occupy each orbital

Again using iodine as an example, we can observe on the periodic table that it has an atomic number of 53. ( In neutral state it contains 53 electrons). The configuration of the entire electron cloud is 1s22s22p63s23p64s23d104p65s24d105p5.

Iodine is a trace element that can be found as a dietary supplement, as well as naturally in some foods and some forms of salt. Iodine is a necessary component of the thyroid hormones triiodothyronine (T3) and thyroxine (T4) (T3).

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An increase in pressure increasing the billing point is an example of a physical property.

As it demonstrates the physical state, the increase in pressure with boiling point is an example of a physical property.

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The complete question is:

An increase in pressure increasing the boiling point of a liquid is an example of a —

A physical change

B chemical change

C physical property

D chemical property

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Answer:

D

Explanation:

Gibb's free energy change(∆G) and Standard electrode potential of electrochemical (Ecell) determine the spontaneity of a reaction.

when ∆G > 0, the reaction is not spontaneous

∆G < 0, the reaction is spontaneous

∆G = 0, the reaction is in equilibrium

when Ecell > 0, the redox reaction is spontaneous

Ecell < 0, the redox reaction is not spontaneous

Ecell = 0, the redox reaction is in equilibrium.

ΔH < 0 contributes to spontaneity.

We can determine it by calculating Gibb's free energy.

It is calculated by the formula:

ΔG = ΔH - TΔS

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Answer: light

Explanation: done

Explanation:

The geometric shape of this molecule is

D. tetrahedral

Hope it will help :)

Answer:

The answer will be D. tetrahedral

The concentration required for the same osmotic pressure is 0.019 molL⁻¹.

The osmotic pressure of an aqueous solution is determined by the concentration of the solute particles present in the solution. To create an aqueous solution of Ca(NO₃)₂ with the same osmotic pressure as 3.08m KCl (1.36 atm), we must first determine the molarity of the solution.

The osmotic pressure can be calculated using the Van 't Hoff equation:

Osmotic Pressure (Π) = iMRT

where i is the Van 't Hoff factor (3 for Ca(NO₃)₂, as it dissociates into 3 ions), M is the molarity of the solution, R is the ideal gas constant (0.0821 L•atm•mol-1•K-1), and T is the absolute temperature (in Kelvin).

Thus, we can rearrange the equation to solve for M:

M = Π/(iRT).

Plugging in the values for Π (1.36 atm), i (3), R (0.0821 L•atm•mol⁻¹•K⁻¹), and T (298K), we get:

M = 1.36/(3*0.0821*298)

M = 0.019 molL⁻¹.

Thus, 0.019 molL⁻¹ is the molarity of the Ca(NO₃)₂ solution that would be necessary to create an aqueous solution with the same osmotic pressure of 1.36 atm as the 3.08m KCl solution.

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Answer:

Noble gasses

Explanation:

nobled gasses

all elements want to loose or gain electrons to be like the noble gasses in bonding but the noble gasses do not bond.