The catalyst used in the catalytic reaction involving the reactants nitrogen and hydrogen.

Do you go to Millbrook? 23.9kPa

Answer:

urm is that an answer lol

The correct answer is D) The element has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵ is Mn, which has 25 electrons in total.

The electron configuration is a way of representing the arrangement of electrons within an atom or ion. The numbers and letters in the configuration represent the energy levels, subshells, and number of electrons in each subshell.

In this case, the configuration 1s²2s²2p⁶3s²3p⁶4s²3d⁵ represents a neutral manganese atom with 25 electrons. The first two electrons occupy the 1s orbital, followed by two in the 2s, six in the 2p, two in the 3s, six in the 3p, two in the 4s, and finally five in the 3d subshell.

This configuration explains why manganese is a transition metal with five valence electrons and exhibits a variety of oxidation states in chemical reactions.

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The various concentrations of the acid would differently react with the same mass of the same type of deposit and the time taken for effervescence to occur is recorded.

In science, the primary way that we gain knowledge is when we carry out  controlled experiment. The experiment is controlled because we are able to control how the variables are manipulated in order to achieve the results that we seek.

Now we want to find out how we can be able to design an experiment that would determine the effects of various concentrations of HCl on the rates of the reaction that involves the deposits.

When we need to do is to prepare various concentrations of the acid and then have a fixed mass of deposit. The various concentrations of the acid are made to react with the fixed mass of deposit and the time taken before the gas is observed is recorded.

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The volume that is occupied by the gas is obtained as  56 L.

We know that from the Avogadro's law, the volume that can be occupied by one mole of a gas is obtained as 22.4 L. This implies that we have to find the number of moles in the 70 g of the CO and then obtain the corresponding volume by simple proportion.

Number of moles of CO = 70.0 g/28 g/mol

= 2.5 moles

If 1 mole of the gas occupies 22.4 L

2.5 moles of the gas occupies 2.5 * 22.4/1 mole

= 56 L

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B change in temperature

Answer:

When we shake the branch of a tree the tree possesses a state of motion whereas the fruits and leaves tend to remain in state of rest. Due to this inertia of rest the fruits and leaves get detached from the branch and because of gravity it falls down.

Explanation:

so it's because of the gravity .

Answer:

A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.

Explanation:

#Use Avogadro

Number of atoms = mol × 6×10²³

7.28 × 10²⁵ = mol × 6×10²³

mol = (7.28×10²⁵) : (6×10²³)

mol = 121.3mol

Answer:

Explanation:

Here, we want to calculate the initial volume of the container

Mathematically, we know that volume and pressure are inversely related. What this means is that as volume increases, pressure is expected to decrease and as pressure increases, volume is expected to decrease

A mathematical link between these two is as follows:

The above is according to Boyles' law.

The values with subscript 1 are the initial values, while the values with the subscript 2 are the final values

Thus:

V1 = ?

P1 = 1.25 atm

V2 = 1L

P2 = 3.75 atm

From the relation:

Zaitsev's rule may or may not come into play during the reaction carried out in this experiment, depending on the specific reaction being studied.

Zaitsev's rule is a chemical principle that predicts the major product of a elimination reaction, which occurs when a molecule loses a small molecule, typically a proton or a halide ion. The rule states that the most substituted alkene is the major product.

In some reactions, the elimination step is the rate-determining step, and Zaitsev's rule would apply. In other reactions, the elimination step may not be the rate-determining step, or the reaction may proceed through a different mechanism that does not follow Zaitsev's rule. Therefore, it is important to consider the specific reaction being studied and the conditions under which it occurs to determine if Zaitsev's rule applies.

Without information about the specific experiment, you are referring to, I cannot accurately determine whether Zaitsev's rule comes into play or not.

Zaitsev's rule is used to predict the major product of an elimination reaction, specifically in E1 and E2 reactions. According to this rule, the most substituted alkene (having more carbon atoms attached to the double bond) is formed as the major product.

If the reaction in your experiment involves an elimination reaction, particularly E1 or E2, then Zaitsev's rule could be relevant in determining the major product formed. If the reaction does not involve elimination, Zaitsev's rule will not be applicable.

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Answer:

The value \(N_A = 0.192 \ mol \cdot m^{-2} \cdot \ s\)

Explanation:

From the question we are told that

     The thickness of the air is \(z_2 - z_1 = 1 \ cm =0.01 \ m\)

      The temperature is  \(T = 25^oc = 25 +273 = 298 \ K\)

     The total pressure is  \(P_T = 1 atm = 1.01325*10^{5} \ Pa\)

      The partial pressure of Ammonia first side is  \(P_{AO} = 0.9 \ atm = 0.9 * 1.01325*10^{5} = 91192.5 \ Pa\)

      The partial pressure of Ammonia to the second side is \(P_{A} = 0.1 \ atm = 0.1 * 1.0325*10^{5} = 10132.5 \ Pa\)

 Rate of flow of ammonia is  

          \(D_{AB} = 0.214 \ cm/s = \frac{0.214 }{10000} = 2.14 *10^{-5} \ m^2 /s\)

Generally the  molar flux of ammonia is mathematically represented as

         \(N_A = \frac{D_{AB} * P_T }{RT(z_2 -z_1)} * ln [\frac{P_T - P_{Al}}{P_T - P_{AO}} ]\)

Here R is the gas constant with value  

         \(R = 8.314 \ m^3 \cdot Pa \cdot mol^{-1} \cdot K\)

             \(N_A = \frac{2.14 *10^{-5} * 1.01325*10^{5} }{8.314 *298 (0.01)} * ln [\frac{1 - 0.1}{1 - 0.9} ]\)

=>           \(N_A = 0.192 \ mol \cdot m^{-2} \cdot \ s\)

Answer:

Explanation:

1. The element you selected is Sodium. some of the physical properties are

i. Sodium has a strong metallic lustre

ii. Sodium are usually silver white in color

iii. Sodium is soft it can be cut with knife

iv. Sodium are malleable and ductile.

v.  Sodium conduct electricity

Sodium belong to group 1 elements which are called Alkali metals. Sodium have one valency electron and it gives this electron easily during bonding . This is one reason sodium and other alkali metals are very reactive. Sodium can instantly be oxidized by water.  Sodium has a relative atomic mass of approximately 23 amu.

2. There are various models that describe atoms .This models includes John Dalton models, J.J Thompson model, Ernest Rutherford model, Bohr's models etc. This models made us understand the role and location of each sub atomic particles. The models shed more light on subatomic particles like electron which revolve around the nucleus.  It provide more information on what contribute to the weight of an atom.

3. The proton , neutron and electron are subatomic particles of an atom. The proton and the neutron are located at the nucleus of an atom.  The proton and neutron contributes majorly to the weight of an atom. The proton is positively charge while neutron has no charge.

Electron is found to move around the nucleus in cloud. The electron is negatively charge. The electron determines bonding of atoms. An atom is electrically neutral if the number of proton is equal to the number of electron.

4. The four fundamental forces includes weak nuclear forces , strong nuclear forces , gravity and electromagnetic forces.

Weak nuclear forces is responsible for particle decay .Nuclear forces don't play a role in chemical reaction . If they are involve in a reaction it becomes nuclear reaction not chemical reaction.

Strong nuclear forces causes a strong nuclear interaction and it is the strongest among the 4 fundamental forces. This strong force only operate when subatomic particles are much closer to each other.

Gravity force is too weak to affect chemical reaction much. The gravity forces involves the interaction between two objects with energy and mass.

The electromagnetic force act between charged particles like negatively charged electron and positively charged proton. Electromagnetic force is the most important force in chemical bonding as it depends on the arrangement of atoms and the state of their electron. Electromagnetic forces exist in various forms like the covalent bond, metallic, ionic , dipole dipole, hydrogen bonds and many more. The major force involve in chemical bonding is the electromagnetic force.

Answer:

fewer peaches will be sold

Explanation:

if the price increases less people will want to buy it, but the orchards would still get money so they wouldnt be affected

Answer:

fewer peaches

Explanation:

Answer: The answer is B. The pressure inside the tires increased.

Explanation:

The relationship between the pressure, volume, and temperature of a gas is described by the ideal gas law, which is usually written as:

\($$PV = nRT$$\)

where:

- \(\(P\)\) is the pressure,

- \(\(V\)\) is the volume,

- \(\(n\)\) is the number of moles of gas,

- \(\(R\)\) is the ideal gas constant, and

- \(\(T\)\) is the temperature (in Kelvin).

In this case, the volume \(\(V\)\) and the number of moles \(\(n\)\) of air in the tires stay the same. The temperature \(\(T\)\) is increasing. Therefore, for the equation to remain balanced, the pressure \(\(P\)\) must also increase.

So, the answer is B. The pressure inside the tires increased.

Answer:

I think the answer is yes and here is my explanation.

Explanation:

According to our principle, when an object is slowing down, the acceleration is in the opposite direction as the velocity. Thus, the object has a negative acceleration.

Answer:

2HNO3(aq)+Sr(OH)2(aq)⇌Sr(NO3)2(aq)+2H2O(l)

Explanation:

The transfer of one H+ ion and one OH- ion occurs in this reaction, and the resulting solution is neutral. the correct answer is:

CH_3CO_2H(aq) + NaOH(aq) ⇌ NaCH3_CO_2(aq) + H_2O(l)

Neutral solutions have the same concentrations of hydrogen and hydroxide ions. A sodium chloride solution or a sugar solution could be used as a neutral solution. A neutral solution has a pH of 7. Water is another common material with a pH of neutral.

The concentrations of H+ and OH- ions in a solution must be equal for it to be neutral.

When an acid and a base are combined in stoichiometrically equal amounts, the only reaction that produces a neutral solution is:

CH_3CO_2H(aq) + NaOH(aq) ⇌ NaCH_3CO_2(aq) + H_2O(l)

This is a neutralization reaction that occurs between acetic acid (CH_3CO_2H) and sodium hydroxide (NaOH), producing sodium acetate (NaCH_3CO_2) and water (H_2O).

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Answer:

The volume of the balloon will decrease.

Explanation:

I had some leftover liquid nitrogen so I tried it in my pool.

Answer:

5 A1C13(aq) + 3 MnCl2(aq) + 3 KCl(aq) + 8 H20(1)

Explanation:

the products are on the right side of the arrow

The three true statements are the bilayer of a cellular membrane is primarily composed of amphipathic (amphiphilic) lipids, the tendency of hydrophobic molecules to aggregate in water is called the hydrophobic effect and placing a hydrophobic molecule into water causes water molecules to orient themselves around it.

The bilayer of a cellular membrane is composed of phospholipids, which have both hydrophobic and hydrophilic parts. The hydrophobic tails of the lipids face inward, while the hydrophilic heads face outward towards the water.

The tendency of hydrophobic molecules to aggregate in water is due to the hydrophobic effect, which is driven by the increase in entropy that occurs when nonpolar molecules cluster together in water.

When a hydrophobic molecule is placed in water, water molecules will orient themselves around it to minimize the contact between the hydrophobic molecule and water.

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The ionization values belong to the element magnesium (Mg). Ionization values help us determine the amount of energy that will be required to remove one or more electrons from an atom. The third period is where we can locate the element that has these ionization values.

These ionization values are listed in the table given below:Element: Mg (Magnesium)First ionization energy: 738 kJ/molSecond ionization energy: 1450 kJ/molThird ionization energy: 7732.7 kJ/mol

For a neutral atom, the first ionization energy (IE1) is the amount of energy required to remove an electron from the outermost shell. As we move from left to right in a period, the ionization energy increases. In the third period, Mg (magnesium) has first, second, and third ionization energies of 738 kJ/mol, 1450 kJ/mol, and 7732.7 kJ/mol, respectively. Magnesium is a chemical element that has an atomic number of 12. It has two valence electrons and is located in group 2 of the periodic table. Magnesium has a melting point of 1,202°F (650°C) and a boiling point of 1,994°F (1,090°C). It is a silver-white metal that is widely used in the manufacture of alloys and other industrial applications.

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The mechanical energy of a stopped car on a steep hill is primarily in the form of gravitational potential energy.

Mechanical energy is the sum of an object's kinetic energy and potential energy. Since the car is stopped, it has no kinetic energy. However, due to its position on a steep hill, it possesses gravitational potential energy, which is calculated as PE = mgh, where m is the mass of the car, g is the acceleration due to gravity, and h is the height above the reference point.

When a car is stopped on a steep hill, its mechanical energy is largely determined by its gravitational potential energy, which results from its mass, the acceleration due to gravity, and its height above a reference point.

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The amount of heat absorbed by the gas = ΔU + W = ΔU + 2.6 × 10³ J.

A 2.66 mol sample of an ideal monatomic gas undergoes a reversible process.

(a) The amount of heat absorbed by the gas is 6.6×10³ J.(

b) The change in the internal energy of the gas is 4.0×10³ J.(c) The amount of work done by the gas is 2.6×10³ J.Concepts Used:

First Law of Thermodynamics, Joule's Law, Reversible Process.

(a) From the graph, the temperature of the gas increases by 75 K.

The change in temperature of the gas = 75 K

Number of moles, n = 2.66 molR = 8.31 J/mol K

The change in the internal energy of the gas, ΔU = nCvΔT, where Cv is the molar specific heat of the gas at constant volume.

For a monatomic gas, Cv = (3/2) R.

Now, the amount of heat absorbed by the gas = ΔU + WBy Joule's law, dQ/dt = ΔU/dt + dW/dtAs the process is reversible, the work done by the gas, W = nRTln(V2/V1)

where, R = 8.31 J/mol K and V2/V1 = (150 J/K)/(16.6 J/K) = 9.04.

Substituting the values, we get W = 2.6 × 10³ J.

Hence, the amount of heat absorbed by the gas = ΔU + W = ΔU + 2.6 × 10³ J.

(b) From the formula ΔU = nCvΔT, ΔU = (3/2) nRΔT = (3/2) × 2.66 × 8.31 × 75 = 4.0 × 10³ J.

(c) From the formula, W = nRTln(V2/V1)W = 2.66 × 8.31 × 75 × ln(150/16.6)W = 2.6 × 10³ J.

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The density of the helium gas is 0.487 g/L

Calculation,

According to Ideal gas equation,

PV = nRT             ...(I)

The values of some terms are given as,

P is the pressure = 3 atm

V is the volume = ?

T is the temperature = 27°C = 27°C + 273 = 300 K

R is the universal gas constant = 0.0821 L∙atm∙mol−1∙K−1

n is the number of moles of helium = given mass of helium/molar mass of helium

n is the number of moles of helium = 1 g/ 4 g/mole = 0.25 mole

So, by putting the value of all data given in the equation (i) we get,

3 atm × V = 0.25 mol ×0.0821 L∙atm∙mol−1∙K−1×300 K

V =  0.25 mol ×0.0821 L∙atm∙mol−1∙K−1×300 K/3 atm

V = 2.05 L

The formula of density = given mass /volume = 1g/2.05 L = 0.487 g/L

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Answer:

The correct answer would be B.

Fluorine (a halogen) is very reactive because it has 7  outer shell electrons.

Explanation:

It's located at the top of the Halogen Group in the periodic table and it's the most electronegative element, this makes it very reactive.

I hope this helps you:)

Fluorine (a halogen) is Very Reactive because it has 7 outer shell electrons.Hence, option (D) is correct.

The halogens are a group in the periodic table consisting of five or six chemically related elements: fluorine, chlorine, bromine, iodine (I), and astatine.

The artificially created element 117, tennessine, may also be a halogen. In the modern IUPAC nomenclature, this group is known as group 17

Therefore, Fluorine (a halogen) is Very Reactive because it has 7 outer shell electrons. Hence, option (D) is correct.

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Answer:

★ B. A washing machine.

Explanation:

What's Electrical energy?

Electrical energy is energy derived from electric potential energy or kinetic energy. When used loosely, electrical energy refers to energy that has been converted from electric potential energy.

The half life is the time taken for only one of the half  of the radioactive substance to remain.

The half life is the time taken for only one of the half  of the radioactive substance to remain. We can see the half life by looking at the graph and observing the point at which the sample decreases to half its original number.

Since the half life of carbon-14 is 5700 years, after ten half lives, almost 60000 years has elapsed thus there is little or no carbon-14 left. As a result of this carbon-14 can not be used if the sample is over 60000 years old.

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Answer:

the 4th one

Explanation:

2NACL 2NA + CL2

Answer:

It's B, the previous answer is wrong

Explanation: