Plant and animal cells have basically the same shape when viewed
under a microscope.
True or false

A because the end result of this reaction is a radical created by the oxidation of an aromatic amine's or phenol's ring substituent. The hydroxyl group of a phenol acts as the ring substituent in this situation.

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Answer:

B (ionic bond)

Explanation:

Because it is! :)

Answer:

B) Alcohol

Explanation:

It is methanol. Alcohol has group 'OH'

When k1 > k2, the KM is most analogous to the Kd. This is because KM is the concentration of substrate at which the reaction rate is half of its maximum velocity, and Kd is the dissociation constant, which is the concentration of ligand at which half of the receptor binding sites are occupied.

In both cases, they represent the affinity of the enzyme or receptor for the substrate or ligand, respectively. The Ka is the association constant, which is the inverse of Kd, and is not directly related to KM. The Kcat is the turnover number, which represents the maximum number of substrate molecules converted to product per unit time by a single enzyme molecule when it is saturated with substrate, and 1/Kcat is the catalytic efficiency, which is not directly related to KM either.
When k-1 > k2 (the rate constant for dissociation of the enzyme-substrate complex is greater than the rate constant for conversion to product), the KM is most analogous to: 1) the Kd

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The following is the reaction's balanced chemical equation:

C3H8 + 5O2 = 3CO2 + 4H2O ,

According to a molar ratio of 1:5, the number of moles of C3H8 that were involved in the reaction was 0.025 g / 44.1 g/mol = 0.000567 mol. The number of O2 moles needed is 5 times the number of C3H8 moles that were reacted, hence the number of O2 moles needed is 0.000567 x 5 = 0.00284 mol. The needed mass of O2 is 0.00284 mol times 32.00 g/mol, or 0.091 mol. response is 0.091 mol

A substance's molar mass is defined as its mass in grams per mole. As seen in this video, the molar masses of a substance's constituent atoms may be added to determine the substance's molar mass.

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46.03 grams of iron and 19.75 grams of oxygen gas reacted to form 65.6 grams of Fe2O3.

What is Moles?

In chemistry, a mole is a unit of measurement that represents a certain amount of a substance. One mole of any substance is equal to 6.022* \(10^{23}\) particles (atoms, ions, etc.), which is known as Avogadro's number. The number of moles of a substance is determined by dividing the mass of the substance by its molar mass, which is the mass of one mole of the substance.

The balanced chemical equation is:

4Fe + 3O2 → 2Fe2O3

From the equation, we can see that 4 moles of Fe react with 3 moles of O2 to produce 2 moles of Fe2O3.

To find out how many grams of Fe and O2 reacted to form 65.6 grams of Fe2O3, we first need to calculate the number of moles of Fe2O3 produced:

molar mass of Fe2O3 = 2 x atomic mass of Fe + 3 x atomic mass of O = 2 x 55.845 + 3 x 15.999 = 159.685 g/mol

moles of Fe2O3 = mass of Fe2O3 / molar mass of Fe2O3

moles of Fe2O3 = 65.6 g / 159.685 g/mol

moles of Fe2O3 = 0.411 mol

From the balanced chemical equation, we know that 2 moles of Fe2O3 are produced from 4 moles of Fe and 3 moles of O2. Therefore, the number of moles of Fe and O2 that reacted can be calculated as follows:

moles of Fe = (4/2) x moles of Fe2O3

moles of Fe = 2 x 0.411 mol

moles of Fe = 0.822 mol

moles of O2 = (3/2) x moles of Fe2O3

moles of O2 = 1.5 x 0.411 mol

moles of O2 = 0.617 mol

Finally, we can calculate the mass of Fe and O2 that reacted:

mass of Fe = moles of Fe x atomic mass of Fe

mass of Fe = 0.822 mol x 55.845 g/mol

mass of Fe = 46.03 g

mass of O2 = moles of O2 x molar mass of O2

mass of O2 = 0.617 mol x 32.00 g/mol

mass of O2 = 19.75 g

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Answer:

1.  electrons

2. From "Y" to "X"

Explanation:

1. Electrons move between the rod since the electrons are the only charge carriers which are free to move.

2. The particles move from from "Y" to "X"  since the electrons are the only charge carriers which are free to move. The positive charge on rod x is due to a deficit of electrons while the negative charge on rod Y is due to the excess of electrons. When the rods come together, the electrons move from "Y" to "X" since the electrons are the only charge carriers which are free to move.

The result of the atomic theory was that chemists began to better understand the properties of matter. Therefore, option (D) is correct.

The atomic theory, proposed by John Dalton in the early 19th century, postulated that matter is composed of indivisible particles called atoms. This theory revolutionized the field of chemistry by providing a framework to understand the behavior and interactions of different substances.

By recognizing that matter is composed of discrete atoms with specific properties, chemists were able to explain phenomena such as chemical reactions, the conservation of mass, and the formation of compounds. The atomic theory laid the foundation for modern chemistry, leading to advancements in understanding the structure of atoms, the development of the periodic table, and the ability to manipulate and engineer materials at the atomic level.

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The active ingredient in milk of magnesia is Mg(OH)₂. Complete and balance the following equation: Mg(OH)₂ + 2 HCl → MgCl₂ + 2 H₂O.

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. We can start by counting the number of atoms of each element in the reactants and products:

Reactants: Mg(OH)₂ + HCl

Products: MgCl₂ + H₂O

Mg: 1 Mg in reactants, 1 Mg in products (balanced)

O: 2 O in reactants, 2 O in products (balanced)

H: 4 H in reactants, 2 H in products (not balanced)

Cl: 1 Cl in reactants, 2 Cl in products (not balanced)

To balance the equation, we can add a coefficient of 2 in front of HCl to balance the hydrogen atoms, and a coefficient of 1 in front of MgCl₂ to balance the chlorine atoms:

Mg(OH)₂ + 2 HCl → MgCl₂ + 2 H₂O

Now the equation is balanced, with 2 atoms of Mg, 4 atoms of O, 6 atoms of H, and 2 atoms of Cl on both sides.

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Answer:

Explanation:

Sodium mass number 23, 11 electrons

Magnesium: neutrons = 12

aluminum : atomic number  = 13

phosporus : protons = 15

Answer:

23

Explanation:

You need to add protons and neutrons to get mass

An increase in the temperature of a substance will increase the fraction of molecules that have enough kinetic energy to escape the liquid phase and will therefore cause an increase in the vapor pressure.

At a certain temperature, the particles in a liquid have enough energy to change into gases. Boiling (also known as vaporisation) is the process of a liquid turning into a gas, whereas condensation is the process of a gas turning into a liquid.When a liquid's temperature rises, the molecules' kinetic energy rises as well, which might weaken intermolecular forces.

As a result, the liquid's viscosity decreases and the liquid can flow more freely. Liquid viscosity reduces as temperature rises, whereas gas viscosity rises. Viscosity diminishes as temperature rises because intermolecular forces deteriorate.

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Answer:

A chemist

I hope this helped :D

Answer:

but were is the answer

Explanation:

i am so confuesed

Answer: 24.32 AMU

Explanation:

See attachment.

In the laboratory, hydrogen gas is used as fuel for various purposes, including heating. In order to start the heating process, it is necessary to allow the hydrogen gas to flow continuously for a while. This is because there may be air or other gases present in the hydrogen gas pipeline that can affect the heating process.

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A first-order reaction refers to a reaction in which the rate of the reaction is directly proportional to the concentration of a single reactant raised to the first power and is expressed as it would take approximately 46.4 minutes for the 80% completion of this first-order reaction to occur. 46.4 minutes.

Rate = k[A]

In this equation, k is the reaction rate constant, and [A] represents the concentration of reactant A.

The half-life of a reaction of the first order completes in 10 minutes. We need to find out how much time will be needed for the 80% completion of this reaction.

To solve for the time needed for 80% completion of a reaction of the first order, we need to use the formula:

Time for 80% completion = 2.303/k x log ([A]₀/[A]t)

where k is the reaction rate constant, [A]₀ is the initial concentration of the reactant and [A]t is the concentration of the reactant after the given time t, and 2.303 is a conversion factor.

Let [A]₀ = 1 and [A]t = 0.2 (since 80% completion means 20% of the original concentration remains)

We know that, t1/2 = 10 min;

therefore, k = 0.693/t1/2

= 0.693/10

= 0.0693 (as 0.693 = ln2)Now,

Time for 80% completion

= 2.303/k x log ([A]₀/[A]t)

= 2.303/0.0693 x log(1/0.2)

= 46.4 minutes

Therefore, it would take approximately 46.4 minutes for the 80% completion of this first-order reaction to occur. 46.4 minutes.

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The equilibrium partial pressure of iodine vapor at 25 °C is approximately 0.25 atmospheres.

The equilibrium partial pressure of iodine vapor above solid iodine at 25 °C can be calculated using the relationship between the standard Gibbs free energy change (ΔG°) and the equilibrium constant (K).

For a gas-phase reaction,
\(K = (P_I2)^2 / P_I(s),\)
where \(P_{I2}\) represents the partial pressure of iodine vapor and\(P_I(s)\)represents the partial pressure of solid iodine.
Rearranging the equation and substituting the known value of ΔG°f (19.4 kJ/mol), we can solve for\(P_{I2}\).
Therefore, the equilibrium partial pressure of iodine vapor at 25 °C as given in the question is approximately 0.25 atmospheres.

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--The complete Question is, At 25 °C, the standard Gibbs free energy change of formation (ΔG°f) for gaseous iodine is known to be 19.4 kJ/mol. Using this information, calculate the equilibrium partial pressure of iodine vapor above solid iodine at the same temperature. --

Answer:

(b) The change favors the reactants which has more gas molecules. ... Describe the effect of increasing the concentration of nitrogen gas or hydrogen gas inside the ... (c) The change causes an decrease in ammonia favoring the reactants. ... (c) Catalysts do not affect the equilibrium only the rate of reaction

Nitrogen dioxide (NO2) has a total of 17 outer (valence) electrons.

To determine the total number of outer (valence) electrons in nitrogen dioxide (NO2), we need to consider the valence electron configuration of each atom and account for the overall molecular structure.

Nitrogen (N) is in Group 5A (Group 15) of the periodic table, so it has five valence electrons. Oxygen (O) is in Group 6A (Group 16) and has six valence electrons. Since there are two oxygen atoms in NO2, the total number of valence electrons from oxygen is 6 × 2 = 12.

The nitrogen dioxide molecule, NO2, has a linear molecular geometry with the nitrogen atom in the center and the two oxygen atoms on either side. In this structure, nitrogen forms a double bond with one oxygen atom and a single bond with the other oxygen atom.

By considering the valence electron configuration and the molecular structure, we can calculate the total number of outer electrons:

Valence electrons from nitrogen (N): 5

Valence electrons from oxygen (O): 12

Adding these together, we get:

5 + 12 = 17

Therefore, nitrogen dioxide (NO2) has a total of 17 outer (valence) electrons.

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Answer:

When the silver-colored penny is heated, the outside zinc atoms and inside copper atoms move around because of the heat excitement. This makes the outer layer of zinc mix with the copper below, which becomes an alloy called yellow brass

Explanation:

The main intermolecular force responsible for the difference in boiling point between 1-hexanol and nonanal (structures below) is induced dipole-induced dipole (London dispersion) forces.

These forces are weak, but their cumulative effect is enough to cause a difference in boiling point between these two molecules. 1-hexanol has a higher boiling point than nonanal because of its larger molecular size, which leads to stronger induced dipole-induced dipole forces.

Intermolecular forces are the attractive and repulsive forces that exist between molecules. These forces are electrostatic in nature, and include van der Waals forces, hydrogen bonds, dipole-dipole forces, and London dispersion forces.

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The original culture density (OCD) of a sample density would be 1,720,000 colony-forming units per unit volume.

The dilution factor is the ratio of the volume of the original sample to the volume of the final diluted sample. In this case, the final dilution factor is 10^-4, which means that the original sample was diluted by a factor of 10,000.

To calculate the OCD, we use the formula: OCD = CFU / Dilution Factor. In this case, the CFU count is given as 172 and the dilution factor is 10^-4.

Using the formula, OCD = 172 / 10^-4, we can simplify the calculation by converting the dilution factor to a whole number. 10^-4 is equivalent to 1 / 10,000.

Substituting the values, OCD = 172 / (1 / 10,000). Dividing by a fraction is equivalent to multiplying by its reciprocal, so OCD = 172 * 10,000.

Calculating the product, OCD = 1,720,000. Therefore, the original culture density of the sample would be 1,720,000 colony-forming units per unit volume.

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The specific heat capacity of a substance is the amount of heat needed to elevate it by 1 degree kelvin per gram. The easier it is for something to heat up, then, the smaller the heat capacity. We would suppose that a cook in a hurry would want a pan that heats up more quickly and would choose one with a lesser heat capacity.

0.385 for copper and 0.900 for aluminum.

Despite using non-SI units, we can still compare using it. It is obvious to him that copper has a lower specific heat, so he will pick that.

In case you're curious, you can also approach this issue from the perspective of heat conduction. To do this, look up the thermal conductivities of each material, and then apply Fourier's rule of heat conduction to determine that Copper would be best.

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Answer:

12 g

Explanation:

From the question given above, the following data were:

Number of atoms = 6.02×10²³ atoms

Mass of ₆C¹² =?

From Avogadro's hypothesis,

1 mole of any substance contains 6.02×10²³ atoms. This implies that 1 mole of ₆C¹² also contains 6.02×10²³ atoms i.e

1 mole of ₆C¹² = 6.02×10²³ atoms

Recall

From the period,

1 mole of ₆C¹² = 12 g

Thus,

12 g of ₆C¹² = 6.02×10²³ atoms

Therefore, 12 g of ₆C¹² contains 6.02×10²³ atoms

The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.

The electrochemical cell is the cell that is capable of generating the electrical energy from the chemical reactions or by the use of the electrical energy to cause the chemical reaction. The conditions for a standard electrochemical cell. select one or more : pressure of 1 atm temperature of 298 k solution concentrations of 1 M.  

There are the two types of the electrochemical cells is as follows : the galvanic called the electrolytic cells. the galvanic cell is also called as the voltaic cell.

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Aspects covered by Bohr's atomic model are : Electrons do not have energy, The energy is determined by the orbit.

Features of Bohr's atomic model are:

1) Electrons revolve around the nucleus in orbits .Each orbit has a definite energy called as energy shell or energy level. Energy of electrons is determine by the energy levels.

2) Orbits is designated as K, L, M, N shell.

3) When an electron jumps from a higher energy level to lower level it emits energy and when it jumps from lower to higher energy level it absorbs energy.

thus, Aspects covered by Bohr's atomic model are : Electrons do not have energy, The energy is determined by the orbit.

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Answer:

It’s the 1st option and 4th option.

Explanation: