What is the difference between a strong acid and a weak acid?


There is no difference between a strong acid and a weak acid because they are both acids.

A strong acid will react with a base. A weak acid will not.

A strong acid will produce a larger amount of ions than a weak acid.

A strong acid will produce a smaller amount of ions than a weak acid.

Answer:

Grahm's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of the mass of its particles.

Molecular weight of NO2 = 46 g mol¹-

Molecular weight of CO2 = 44g mol¹-

Thus the compound which has a lower molecular mass will diffuse at a faster rate than the heavier compound. In this case, the molecular mass of NO2 is more than the CO2 so, NO2 will diffuse at a slower rate than the CO2 molecule.

Answer:

Rate = (0.64 M²/min) [A]¹[B]²

Explanation:

1) Determination of the orders of A & B:

The rate law of the reaction = k [A]ᵃ[B]ᵇ

where, k is the rate law constant,

a is the order of the reaction with respect to reactant A,

b is the order of the reaction with respect to reactant B.

This is initial rate method problem:

From trial 1 & 2:

Reactant [A] has the same concentration in both trials, but [B] has different concentrations and the rate of the reaction changes, so the reaction rate depends on [B].

From trial 1, Rate₁ = k [A₁]ᵃ[B₁]ᵇ, [1.2 × 10⁻² M/min] = k [0.30 M]ᵃ[0.25 M]ᵇ

From trial 2, Rate₂ = k [A₂]ᵃ[B₂]ᵇ, [4.8 × 10⁻² M/min] = k [0.30 M]ᵃ[0.50 M]ᵇ

By dividing Rate₁ / Rate₂:

Rate₁ / Rate₂ = k [A₁]ᵃ[B₁]ᵇ / k [A₂]ᵃ[B₂]ᵇ

[1.2 × 10⁻² M/min] / [4.8 × 10⁻² M/min] = k [0.30 M]ᵃ[0.25]ᵇ / k [0.30 M]ᵃ[0.50 M]ᵇ

0.25 = [0.50]ᵇ

Taking log for both sides; log(0.25) = b log(0.5)

b = log(0.25) / log(0.5) = 2.

The reaction is second order with respect to reactant B.

By the same way for reactant A:

From trial 2 & 3:

Reactant [B] has the same concentration in both trials, but [A] has different concentrations and the rate of the reaction changes, so the reaction rate depends on [A].

From trial 2, Rate₂ = k [A₂]ᵃ[B₂]ᵇ, [4.8 × 10⁻² M/min] = k [0.30 M]ᵃ[0.50 M]ᵇ

From trial 2, Rate₃ = k [A₃]ᵃ[B₃]ᵇ, [9.6 × 10⁻² M/min] = k [0.60 M]ᵃ[0.50 M]ᵇ

By dividing Rate₂ / Rate₃:

Rate₂ / Rate₃ = k [A₂]ᵃ[B₂]ᵇ / k [A₃]ᵃ[B₃]ᵇ

[4.8 × 10⁻² M/min] / [9.6 × 10⁻² M/min] = k [0.30 M]ᵃ[0.50 M]ᵇ / k [0.60 M]ᵃ[0.50 M]ᵇ

0.50 = [0.50]ᵃ

Taking log for both sides; log(0.50) = a log(0.5)

a = log(0.50) / log(0.50) = 1.

The reaction is first order with respect to reactant A.

The rate law of the reaction will be: Rate = k [A]¹[B]²

The overall order of the reaction is third order reaction.

2) Determining the rate law constant:

Taking data of trial 1:

Rate = k [A]¹[B]²

[1.2 × 10⁻² M/min] = k [0.30 M]¹[0.25 M]²

k = [1.2 × 10⁻² M/min] / [0.30 M]¹[0.25 M]² = 0.64 M²/min.

So, the rate law will be: Rate = (0.64 M²/min) [A]¹[B]²

Answer:  Very big number

Explanation:

wow

Answer:

Explanation:

Lithium is the first element in the second period. The second period has a total number of eight elements in all. The number of electrons in a lithium atom is 3.

The electronic configuration of lithium is 1s²2s¹. Lithium has just a single electron in its outermost shell.

Moving from left to right across the second period, the number of electrons in the outermost shell of the elements increases till it reaches the octet i.e 8:

   Be (4) : 1s²2s²

   B (5): 1s²2s²2p¹

   C (6): 1s²2s²2p²

   N (7): 1s²2s²2p³

   O(8): 1s²2s²2p⁴

   F (9): 1s²2s²2p⁵

   Ne(10): 1s²2s²2p⁶

As you go from left to right, the number of valence electrons increases by 1.

From left to right, the number of shell remains fairly constant. Li and Be has one electronic shell each while the rest of the elements in the period have two shells.

As we move from lithium to neon in the periodic table, the elements gain one electron each. Hence, their electron configuration increases sequentially, in line with their increasing atomic number.

When starting with lithium and proceeding to neon across the second period of the periodic table, the atomic number increases from 3 to 10. The atomic number corresponds to the number of protons, which also equals the number of electrons in an atom for a neutral element. Accordingly, as we move from left to right, one observes an increase in the electron configuration, with each subsequent element gaining an additional electron. For instance, the electron configuration of lithium is 1s2 2s1, that of beryllium (the next element) is 1s2 2s2, and so on, till we reach neon with a configuration of 1s2 2s2 2p6. Hence, the number of electrons (and hence electron configuration) increases as we move from lithium to neon.

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Answer:

acid: sulphuric acid (H2SO4)

base: sodium hydroxide (2NaOH)

Explanation:

Final answer:

Sulfuric acid (H2SO4) and sodium hydroxide (NaOH) react to form water and sodium sulfate (Na2SO4) in a neutralization reaction.

Explanation:

The acid and base that react to form water and sodium sulfate are sulfuric acid (H2SO4) and sodium hydroxide (NaOH). The reaction between these two substances is a classic example of an acid-base neutralization, which results in the formation of water (H2O) and a salt, in this case, sodium sulfate (Na2SO4). The balanced chemical equation for this neutralization reaction is:

H2SO4 (aq) + 2NaOH (aq) → Na2SO4 (aq) + 2H2O(l)

Since sulfuric acid is a diprotic acid, it can release two hydrogen ions (H+), and therefore, it requires two moles of the strong base sodium hydroxide, which provides hydroxide ions (OH-), to completely neutralize it. The resulting salt, sodium sulfate, is highly soluble in water.

Answer:119.38 g/mol

Explanation:

Add the Molar mass of each element to get the final answer. Use the Periodic table to find the molar mass. Molar mass is located under neath the elements.

Molecular mass of CHCl3 is 119.5 grams/mole

Molecular mass of CHCl3 = mass of Carbon+ mass of Hydrogen+ 3×(mass of Chlorine)

Molecular mass of CHCl3= 12+1+(3×35.5)= 119.5

Hence The Molecular mass of CHCl3 is 119.5 grams/ mole

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Answer:

Ionic or electrovalent bonds

Explanation:

Ionic or electrovalent bonds are interatomic or intramolecular bonds which are formed between two kinds of atoms having a large electronegativity difference usually 2.1.

Electronegativity is the property that combines the ability of an atom to gain or lose electrons. It is expressed as the tendency with which atoms of elements attracts valence electrons in a chemical bond.

In this bond type, a metal transfers its electrons to a more electronegative atom which is a non-metal.

The answer is: a. ionic bonding.

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).  

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For example, compound magnesium chloride (MgCl₂) has ionic bond.  

In this example, chlorine is large company, because it has greater electronegativity than magnesium (small company) and take electrons (assets) from it.

Magnesium (Mg) transfers two electrons, became positive cation, to chlorine (Cl), which became negative anion.  

Magnesium is metal from group 2 and chlorine is nonmetal from group 17 of the Periodic table.  

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.

Answer:

the right side of the arrow.

Explanation:

reactants are on left because they are the ones reacting. products are on the right because they are the final products.

Answer:

Hydrogen’s nucleus is electron deficient when it bonds with an electronegative atom.

Explanation:

Hydrogen bonding is only possible with hydrogen since Hydrogen’s nucleus is electron deficient when it bonds with an electronegative atom.

Hydrogen bonding is only possible with hydrogen because of its unique properties. When hydrogen bonds with electronegative atoms, it becomes partially positive and attracts the partial negative charge on the other atom, creating a strong electrostatic attraction. Hydrogen bonding is stronger compared to other bonds and is specific to hydrogen.

Hydrogen bonding is only possible with hydrogen because of its unique properties. When hydrogen bonds with a highly electronegative atom like oxygen, nitrogen, or fluorine, it becomes partially positive due to the unequal sharing of electrons. This partial positive charge on hydrogen allows it to attract the partial negative charge on the electronegative atom, creating a strong electrostatic attraction known as a hydrogen bond.

Hydrogen bonding is stronger compared to other types of bonds like covalent or ionic bonds. This is because hydrogen bonding involves the attraction between partially charged atoms, while covalent bonds involve sharing electrons between atoms. The difference in electronegativity and unequal sharing of electrons in hydrogen bonding contribute to its strength and specificity to hydrogen.

In addition to being electronegative, hydrogen is also a relatively small atom. This allows for closer approach between the hydrogen atom and atoms of other elements, maximizing the strength of hydrogen bonds.

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Answer:

The answer is C

Explanation:

"The general structure and physical properties of the interior of the earth are inferred through the analysis of seismic waves." This is quoted from what I am currently learning and if you were to do proper research it would tell you the same.

How it works.

"These waves are created by the energy released during earthquakes. The path of seismic waves through the earth is recorded by a world-wide network of seismographs which are located at earthquake monitoring facilities. The path of the seismic waves may be traced from an earthquake's epicenter  through the earth as they are received at numerous sites around the world. "Taken from my textbook.

Answer: H2SO4(aq) + 2NaOH(aq) → Na2SO4(aq) + 2H2O(1)

Explanation:

[tex]H_2SO_4(aq) + 2NaOH(aq)[/tex] → [tex]Na_2SO_4(aq) + 2H_2O(l)[/tex] is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase.

Formula Equation: represents the reactants and products of a chemical reaction by their symbols or formulas.

Example, [tex]CH_4(g) + O_2(g)[/tex] → [tex]CO_2(g) + H_2O(g)[/tex]

[tex]H_2SO_4(aq) + 2NaOH(aq)[/tex] → [tex]Na_2SO_4(aq) + 2H_2O(l)[/tex] is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase.

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Answer:

See below.

Explanation:

That is because  of the .48.

85.48 is closer to 85 than 86.

The amount of CO2 in the atmosphere has increased dramatically due to(mainly) excessive burning of fossil fuels.

Answer:

Answer: you gota show the digram for me to help dude

Explanation:

The diagram that represents the phase that occurs after a solid melts is Diagram 4.

Diagram 1 - This shows a tightly packed arrangement of blue spheres, which is representative of the solid state of matter. In the solid phase, the particles (atoms, molecules, or ions) are closely packed together in a fixed, crystalline structure.

Diagram 2 - This shows a more dispersed arrangement of yellow circles, which is representative of the gaseous state of matter. In the gas phase, the particles have high kinetic energy and are spread out, occupying the full volume of their container.

Diagram 3 - This shows a less tightly packed arrangement of red spheres compared to Diagram 1, which is characteristic of the liquid state of matter. In the liquid phase, the particles have more freedom of movement compared to the solid state, but are still in close proximity to each other.

Diagram 4 - This grid-like pattern is most representative of the liquid phase that occurs after a solid substance melts. When a solid is heated and reaches its melting point, the particles gain enough kinetic energy to break free of the fixed, crystalline structure and adopt a more fluid, liquid arrangement shown in Diagram 4.

Internal stimuli are changes to the inside of ones body. The only choice that occurs on the inside is D) a decrease in oxygen levels in the blood during exercise.

air temperature change, artificial light, and water availability are all EXTERNAL STIMULI  

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Answer:

Answer:

hypothesis

Explanation:

a question that can be answered wity a hypothesis is a question a scientist can answer

Science can answer questions that can be tested through observations and experiments. It relies on empirical evidence and the scientific method to provide explanations for natural phenomena. Scientific inquiries involve formulating hypotheses, conducting experiments, and analyzing results to draw conclusions.

The realm of science is vast, encompassing everything from the minuscule particles of physics to the vast complexities of biological ecosystems. The types of questions that science can answer are those that can be measured, tested, and observed. Whether it's understanding the laws of physics, exploring chemical reactions, or uncovering the intricacies of living organisms, science seeks to provide concrete explanations based on systematic studies. In essence, science is equipped to answer questions that have the potential for empirical verification and reproducible results. It's this empirical nature that sets scientific knowledge apart from other forms of understanding. However, there are questions that science may not be able to answer, such as those rooted in personal beliefs, morals, and the supernatural, as these cannot be observed or measured in the same way.

Answee

the plant cells are placed in the salt solution, there is a higher concentration of water molecules in the cell and a lower concentration of water in the salt solution and thus a concentration gradient has been set up. the cell membrane is now pressed up against the cell wall and the cell is said to be turgid.

Answer:

i don't know

Explanation:

Answer:

Ionic compounds differ from ions in that the overall charge in ionic compounds equals zero while the overall charge in ions is less than or greater than zero. Ions have a superscript number followed by a either a positive or a negative sign. Where both signs appear in the same formula they make it an ionic compound.

carbon atoms can form chains thousands of atoms long.

Answer:

thousands

Explanation:

Carbon atoms can form chains thousands of atoms long.

Answer:

c. Radiation

Explanation:

a and b are wrong. You can't have convection or convection currents without air, and all the air has been removed from the box.

d is wrong. There is no liquid in the box.

c is correct. Heat can be transmitted even through a vacuum by radiation (e.g., the Sun). You can quickly feel the heat radiated by a piece of white-hot iron.

A scientist heats a piece of iron until it is glowing white-hot. He places the metal inside a metal box. He removes all of the air from the inside of the box. After a few seconds, the sides of the box that are not touching the metal begin to feel warm. Radiation process is most likely responsible for the warming.

Hence, Option (C) is correct answer.

The transfer of  heat energy by direct contact is called Conduction.

The transfer of thermal energy through the movement of matter is called as Convection current.

The transfer of thermal energy through the thermal emission is called as Radiation.

It is the process in which heat requires to occur is called Evaporation.

Thus from the above conclusion we can say that A scientist heats a piece of iron until it is glowing white-hot. He places the metal inside a metal box. He removes all of the air from the inside of the box. After a few seconds, the sides of the box that are not touching the metal begin to feel warm. Radiation process is most likely responsible for the warming.

Hence, Option (C) is correct answer.

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Answer:

Explanation:

The Electronic Configuration of the elements is the arrangement of all electrons of an element in energy levels and sub-levels (orbitals).  

There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level. Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4, called: s, p, d, f. In the sub-level s there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.

In level 1 there is only one sub-level, which will be the s. In level 2 there are 2 sub-levels, the s and the p. At level 3 there are 3 sub-levels s, p and d. And at level 4 there are 4 sub-levels, the s, the p, the d and the f.

Aufbau's principle is a principle of atomic physics, which explains how electrons are accommodated in their orbits around the nucleus of the atom. This principle states that the filling of these orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.

The simplest of the sub-levels is 1s. If you fill the 1s you can start filling the 2s. After the 2s sub-level is satisfied, the 2p can begin to fill and so on.  

The atomic number Z of the element represents the number of protons of the element, and in a neutral atom it also indicates the number of electrons.  

So, given that the atomic number of the phosphorus is 15, and everything that has been said before, it is possible to say that the electrons that it has in the orbitals will be placed as follows:

1s² 2s² 2p⁶ 3s² 3p³

Finally, the orbital configuration of the phosphorus atom (P) will be as the image shows.

The orbital configuration of the phosphorus (p) atom is attached to the image below.

The phosphorus (P) atom has an atomic number of 15, which means it has 15 electrons. The electron configuration of phosphorus can be determined by filling up the orbitals according to the Aufbau principle and the Pauli exclusion principle.

1s² 2s² 2p⁶ 3s² 3p³, this electron configuration represents the distribution of electrons in the atomic orbitals of a phosphorus atom. The numbers represent the principal quantum numbers (n) and the letters represent the azimuthal quantum numbers (s, p). The superscripts indicate the number of electrons occupying each orbital.

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Answer:

PCI3

Explanation:

PCI3 is a product in one reaction and a reactant in the other. This makes it an intermediate as it is produced then used up in the same series of reactions.

Answer: C. PCI3

Explanation:

Answer:

0.422 mol/L.

Explanation:

M = (no. of moles of glucose)/(volume of the solution (L))

M = (mass/molar mass)of glucose / (volume of the solution (L)).

∴ M = (mass/molar mass)of glucose / (volume of the solution (L)) = (289 g/342.2965 g/mol)/(2.0 L) = 0.422 mol/L.

Answer:

Explanation:

Reaction rate is a measure of the speed of a chemical reaction. There are many theories that have been put forward to explain reaction rates. One of which is the collision theory.

The collision theory postulates that for a reaction to occur, there must be collisions between reacting particles. This implies that the number of successful or effective collision of particles determines the rate of a chemical reaction. For a collision to be successful, the particles must be properly oriented and equiped with adequate energy for the reaction.

One of the key component of the energy required for effective collision is temeperature. The  number of effective collision and consequently the rate of chemical reactions are directly proportional to the temperature at which the reaction occurs. With increasing temperature, the activation energy becomes activated and the number of collision increases.

Answer:

Six electrons.

Explanation:

A carbon atom has six protons, so it must have six electrons.

The carbon atom has a total of six (6) electrons.

Hence, the carbon atom has a total of six (6) electrons.

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Answer:

D. The frictional force overcomes the force that binds the electrons to the atoms, enabling the electrons to move elsewhere

Explanation:

Neutral objects becomes charged by rubbing them together due to the frictional force which overcomes the attractive force holding electrons together in an atom.

Friction is the resistance to flow or movement. When we rub bodies together, the movement of electrons becomes inhibited and this can cause an orbital electron loosely held in an atom to be pulled off as the force of friction increases. This mechanism would result in a body losing electron and another readily gaining that electron as they interact. The loss and gain of electrons causes a neutral body to become charged.

Answer:

its D

Explanation:

Answer:

An acid and a Base :)

Explanation:

I just took the test got a 96 A

Answer:

The specific heat of the unknown substance is 1.22 J/g.°C.

Explanation:

Heat lost by substance (Qc) = Heat gained by the water (Qw) ,

- (Qc) = (Qw).

Qw = m.c.ΔT,

where, Qw is the amount of heat released to water (Q = ??? J).

m is the mass of water (m = 110.0 g).

c is the specific heat capacity of solution (c = 4.18 J/g.°C).

ΔT is the difference in T (ΔT = final temperature - initial temperature = 32.4°C - 24.2°C = 8.2°C).

∴ Q = m.c.ΔT = (110.0 g)(4.18 J/g.°C)(8.2°C) = 3770.36 J.

(Qc) = m.c.ΔT,

where, Qc is the amount of heat lost by substance (Qc = - 3770.36 J).

m is the mass of water (m = 42.5 g).

c is the specific heat capacity of solution (c = ??? J/g.°C).

ΔT is the difference in T (ΔT = final temperature - initial temperature = 32.4°C - 105.0°C = -72.6°C).

∴ (- 3770.36 J) = (42.5 g)(c)(-72.6°C).

∴ c = (- 3770.36 J)/(42.5 g)(-72.6°C) = 1.222 J/g.°C.

Number of moles= mass/ molar mass

Or n=m/MM

n = number of moles

m = mass

MM = molar mass

1) n CuO = 2.4g / 79.54g/mol = 0.03 mol CuO

2) n Cu(NO3)2.xH2O = 7.26 g / 205.6 = 0.035 moles of Cu(NO3)2.xH2O

3) 205.6 g

Cu = 63.5 g

N = 14g

O =16g

H= 1 g

63.5+ (14+(16*3))*2+1*2+16 =205.6 g

4) yes is 188g

5) I don’t know, I assume was 1

1) The number of moles of CuO formed is 0.117 moles. 2) The number of moles of Cu(NO3)2.xH2O in the hydrate is 0.117 moles. 3) The mass of 1 mole of Cu(NO3)2.xH2O is 62 g. 4) The mass of 1 mole of Cu(NO3)2 is 188 g. 5) The value of x in the hydrate is -126 g/mol.

In order to answer the given questions, we need to first find the molar mass of Cu(NO3)2.xH2O. The molar mass of Cu(NO3)2 is 187.55 g/mol. To find x, we can subtract the molar mass of Cu(NO3)2 from the molar mass of Cu(NO3)2.xH2O. The molar mass of Cu(NO3)2.xH2O is 249.55 - 187.55 = 62 g/mol. Now we can answer the questions:

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Answer:

[tex]\boxed{\text{Roughly a million times greater}}.[/tex]

Explanation:

For example, the energy released in burning 1 mol of octane, a component of gasoline, is about 5000 kJ.

The energy released in the fission of 1 mol of uranium-235 is

about 1.5 × 10¹⁰ kJ .

The ratio is  

[tex]\dfrac{1.5 \times 10^{10} }{5000} \approx 3 \times 10^{6}\\\\\text{The energy released by nuclear reactions is } \boxed{\textbf{roughly a million times greater}}\\\text{ than that released during chemical reactions.}[/tex]

The energy released during chemical reactions is much greater than the energy released per mole of reactant during nuclear reactions.

A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom of a radioactive element is transformed by being joined (fusion) or split (fission) with the nucleus of another atom and it is accompanied by the release of great amount if energy.

A chemical reaction refers to a chemical process that involves the continuous transformation (rearrangement) of the ionic, atomic or molecular structure of a chemical element by breaking down and forming chemical bonds, in order to produce a new chemical compound.

In conclusion, the energy released per mole of reactant during chemical reactions is much greater than the energy released per mole of reactant during nuclear reactions.

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