4.
What does the law of conservation of matter state?

A Matter will only combine with other types of matter in specific ratios that
never change.

B Matter can be created or destroyed, but can never change from one form to
another.

C Matter can't be created or destroyed but can change from one form to
another.

D Matter can be created, but it can never be destroyed.

Option B. The ionization energy increases because the ratio of protons to electrons increases. explains the change in ionization energy that occurs between removing the first and second electrons from an atom.

The ionization energy is the degree of the functionality of an element to go into chemical reactions requiring ion formation or donation of electrons. it is also usually associated with the nature of the chemical bonding within the compounds shaped by the factors. See additionally binding strength; electron affinity.

Ionization energy is superb for neutral atoms, meaning that ionization is an endothermic system. more or less speaking, the nearer the outermost electrons are to the nucleus of the atom, the higher the atom's ionization electricity. In physics, ionization power is typically expressed in electronvolts (eV) or joules (J).

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For instance, the empirical formula of a hydrocarbon is CH 2, and its M r is 42. Consequently, C 3H 6 is the hydrocarbon's chemical formula.

Finding the mass of C in CO2 and H in H2O is the initial stage in this process. This is accomplished by multiplying by the mass of the compound formed after dividing the atomic mass by the molecular mass. The empirical formula for this hydrocarbon is CH3, as we have a ratio of 1 carbon atom to 3 hydrogen atoms.

A saturated hydrocarbon with one ring has the generic formula CnH2n. For the majority of compounds, details other than the chemical formula are required to clarify their structure. However, a chemical formula's C:H ratio can reveal information about the chemical structure.

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Answer:

MgO(s) + 2HCL(aq) --- > MgCl2(s) + H2O(l)

The process of crenation occurs when the concentration of solute outside the cell is than inside the cell and the solution is said to be hypertonic.

What is crenation?

In botany and zoology, the term "crenation" refers to the round-toothed or scalloped shape of an object, particularly a leaf or shell. Modern Latin crenatus, meaning "scalloped or notched," is derived from common Latin crena, meaning "notch."

The term  can refer to a variety of items, including cells. One process of crenation is the contraction of a cell upon exposure to a hypertonic solution due to the loss of water through osmosis.Cucumber pickling and salt-curing of beef are practical applications of crenation.

Hence, the process of crenation occurs when the concentration of solute outside the cell is than inside the cell and the solution is said to be hypertonic.

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Acid will have an increased concentration in someone who is suffocating then suffocating does not affect any body acid

Acid in the body are gastric acid or stomach acid is a digestive fluid formed within the stomach lining and with pH between 1 and 3 gastric acid play a key role in digestion of protein by activating digestive enzyme

And the asphyxiation also called asphyxia or called suffocation is when the body doesn't get enough oxygen and without immediate intervention it can get lead to loss of consciousness or brain injury or death so any acid in the body doesn't affect if someone is suffocating

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The formula for the ideal-gas percent deviation is: PV = nRT, where R = 0.08206 L.atm/ k.mol = 8.3145 J/K.mol

General gas equation:

[tex]\frac{P_{i} V_{i} }{n_{i} T_{i} }[/tex] = [tex]\frac{P_{f} V_{f} }{n_{f} T_{f} }[/tex]

Density of gas:

р = [tex]\frac{MP}{RT}[/tex]

Any collection of relationships between a single quantity (such as V) and a number of other variables (such as P, T, and n) can be combined into a single statement that encompasses all of the relationships simultaneously. Prior to now, the following three unique expressions were derived:

Boyle’s law

V ∝ 1/P at constant n and T

Charles’s law

V ∝ T at constant n and P

Avogadro’s law

shows V ∝ n at constant T and P

by Combining these three expressions,

V ∝ nT/P

The proportionality constant, also referred to as the gas constant and represented by the letter R, can be written as follows by combining these three expressions:

V = Cons.(nT/P).

Equation becomes V = RnT/P = nRT/P when R is included.

To get rid of the fractions, multiply both sides of the equation by P to get PV = nRT.

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Volume of the mineral sample is 30ml.

The buoyant force on a fluid is equal to the weight of the displaced fluid, according to Archimedes' principle. Equation buoyant force = density of fluid x volume of displaced fluid x acceleration due to gravity is used to calculate the buoyant force.

The formula Fb=Vg can be used to calculate the buoyant force. Fb = V g, where Fb is the buoyant force in Newtons, is the fluid density in kilograms per cubic meter, V is the volume of the displaced fluid in cubic meters, and g is the acceleration brought on by gravity.

Volume of mineral sample = 30ml

Volume of mineral sample = [tex]V_{final}[/tex] - [tex]V_{intial}[/tex]

Volume of mineral sample = 180-150

Volume of mineral sample = 30ml.

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Pbcl2 precipitate when 275 ml of a 0.134 m solution of pb(no3)2 is added to 125 ml of 0.0339 m solution of nacl? the ksp of pbcl2 is 1.17e-5.

Given that,

The volume of NaCl = 125 ml

Concentration of NaCl = 0.0339 m

The volume of Pb(NO3)2 = 275 ml

Concentration of Pb(NO3)2 = 0.134 m

K(eq) = 1.17 × 10(-5) --------(1)

Total volume = 275 + 125 = 400 ml

Pb(NO3)2 ------- Pb(+2) + 2 NO3(-)

at t = 0 0.134 0 0

at t = t 0 0.134 0.134

NaCl -------- Na(+) + Cl(+)

at t = 0 0. 0339 0 0

at t = t 0 0.0339 0.0339

PbCl2 ---------- Pb(+2) + 2Cl(-)

Q(sp) = [Pb+2] [ Cl-]^2

By substituting the values of conc. of all the ions, we get Pbcl2 precipitate when 275 ml of a 0.134 m solution of pb(no3)2 is added to 125 ml of 0.0339 m solution of nacl? the ksp of pbcl2 is 1.17e-5.

= (275 × 0.134/ 400) (125 × 0.0339/400)^2

= 9.8 × 10(-6)

As we noticed that, Ksp > Qsp

Therefore, PbCl2 will not precipitate.

Thus, we concluded that the Pbcl2 precipitate when 275 ml of a 0.134 m solution of pb(no3)2 is added to 125 ml of 0.0339 m solution of nacl? the ksp of pbcl2 is 1.17e-5.

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Acid has a pH below 7 while water has a pH of 7. A strong acid with a pH of roughly 3, HCl is. Water gets more acidic and loses pH in the range of 4-5 when HCl is added to it.

A substance's pH is a gauge of how basic or acidic it is. It is a measurement of the amount of H+ present in the solution. It is equivalent to the negative logarithm of the concentration of H+ ions mathematically.

A solution is acidic if its pH value is less than 7, and basic if it is greater than 7. Acids have a lower pH because they contain more H+ ions. Strong acid hydrochloric acid has a pH between 2 and 3.

Water has no charge. Water becomes acidic in pH if any acid is introduced. Therefore, if HCl is given to water, the pH of the water will change to 3-5 depending on the acid content.

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In the mentioned reaction:

Cu²⁺ + e⁻ → Cu ; Cu²⁺ is reduced

Fe → Fe³⁺ + 3e⁻ ; Fe is oxidized

2l⁻ → l₂ + 2e⁻ ; l⁻ is oxidized

2H⁺ + 2e⁻ → H₂ ; H⁺ is reduced

Oxidation is the process of adding oxygen or electronegative elements or removing hydrogen or electropositive elements. According to the electronic concept, oxidation is defined as the process of losing one or more electrons.

Reduction is the process of adding hydrogen or electropositive elements or removing oxygen or electronegative elements. According to the electron concept, reduction is defined as the process of gaining one or more electrons.

For the given problem,

The oxidation number of Cu²⁺decreased from +2 to 0. thus, it is reduced.

The oxidation number of Fe increased from 0 to +3, it is therefore oxidized.

The oxidation number of l⁻  increased from -1 to 0. It is oxidized.

The oxidation number of H⁺ decreased from +1 to 0. It has been reduced.

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Calcium hydroxide is created when calcium and oxygen mix.

Calcium Hydroxide in the Electron Dot formula:

Ca is a compound (OH)

Name of second compound is Calcium Hydroxide.

A Lewis structure is a very condensed representation of the electrons in the valence shell of a molecule. It is used to show the electron arrangements around specific atoms in compounds. The electrons are shown as "dots" or as a line when two atoms are bound together. To reach the "ideal" electron configuration, the octet rule and formal charges must be met.

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Actual mass of CO recovered is 99.4g

Balance equation is : SiO2 + 3C    SiC + 2CO

Molar mass of CO is 28.01 g/mol

Moles of CO = given mass/molecular mass = 100/28.1 = 3.55mol

mass = moles of sio2 x molecular mass

Actual mass = 3.55mol of CO x 28 = 99.4g

The amount of matter that makes up an element's atom, or atomic mass. It is expressed as a multiple of 1.992646547 1023 gram, which is equal to one-twelfth of the mass of the carbon-12 atom, which has an atomic mass of 12 units. 1 atomic mass unit (amu) is equal to 1.660539040 1024 grams on this scale. An indicator of an element's atomic mass is the atomic mass unit (AMU or amu). The atomic mass unit (AMU), also called the dalton (Da) or the unified atomic mass unit (u), expresses both atomic and molecular masses. Only 1/1,836 the mass of a proton, 9.1093837015 1031 kg, is the rest mass of an electron. Therefore, compared to a proton or neutron, an electron is thought to be almost massless, and the electron mass

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The percent yield will be 103 %

Mass of potassium bicarbonate = 1.00 g

Molar mass of potassium bicarbonate = 100.115 g/mol

Mass of potassium carbonate = 0.710 g

Molar mass of potassium bicarbonate = 138.205 g/mol

Calculated yield = 0.690 g

Percent yield = ?

Calculated yield is given, if not you can find out by following steps:

Write the balanced chemical equation

    2KHCO₃ →  K₂CO₃ + H₂O + CO₂

Hence 2 moles of KHCO₃ decompose to produce 1 mole of K₂CO₃

This means that 2 × 100.115 g of KHCO₃ will produce 138.205 g of K₂CO₃

    Calculate for 1 g = 138.205  / 200.23

    Calculate for 1 g = 0.690 g

This means that 1 g of KHCO₃ will produce 0.690 g of K₂CO₃

Now calculate % yield

    % yield = (actual yield / calculated yield)

    % yield = (0.710 / 0.690) 100

    % yield = 1.029 * 100

    % yield = 103 %

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When parts of the upper mantle collide with each other, the force causes changes on the surface like volcanoes and fractures  the collision not impact the asthenosphere because asthenosphere is the plastic and brittle

The asthenosphere is the unique to our planet and earth is the only planet in the solar system with an asthenosphere and if planet doesn't have water this means it doesn't have an asthenosphere and the asthenosphere play an important role in plate tectonic movement and asthenosphere is situated underneath the solid lithosphere and the asthenosphere is ductile and deform easily compared to the overlying lithosphere so the collision not impact the asthenosphere because  asthenosphere is the plastic and brittle

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Calcium has approximately 20.439% of mass in calcium sulphate compound.

Calcium sulphate is the inorganic compound with the formula CaSO4 and related hydrates. in the form of anhydrite, it is used as a dessicant. One particular hydrate is better known as plaster of paris and another occurs naturallly as the mineral gypsum. It has many uses in the industry. All forms are white solids that are poorly soluble in water. Calcium sulfate causes permanent hardness in water.

The compounds exist in three level of hydration corresponding to different crystallographic structure and to minerals.

a. CaSO4 is an anhydrous state. The structure is related to that of zirconium orthosilicate.

b. CaSO4.H2O Dihydrate

c. CaSO4.1/2H2O Hemihydrate.

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The wavelength of the wave having a frequency of 5.00×10¹⁴ s⁻¹ is 6×10⁻⁷ m

We know that the velocity is related to wavelength and frequency according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

Thus, with the above formula, we can determine the wavelength. Details below:

Velocity (v) = wavelength (λ) × frequency (f)

3×10⁸ = wavelength × 5.00×10¹⁴

Divide both sides by 5.00×10¹⁴

Wavelength = 3×10⁸ / 5.00×10¹⁴

Wavelength = 6×10⁻⁷ m

Therforee, the wavelength is 6×10⁻⁷ m

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The Lewis structure can be used to identify the following traits. Considering one,

H₃N + BF₃ ———> [H₃N—->BF₃]

The valence shell electrons of a molecule are depicted in a highly condensed manner in a Lewis structure. It serves as a visual representation of the electron arrangements surrounding specific atoms in molecules. In bonds involving two atoms, electrons are shown as lines or as "dots" respectively.

A molecule's Lewis structure reveals how many valence electrons are attached to each atom. The Lewis structure of a molecule can be used to infer a lot of significant information. These details include, among others;

Each atom in the molecule has a certain number of valence electrons attached to its valence shell.

The molecule's type of bonding

Whether the atoms in the molecule follow the octet rule or not

Potential resonance configurations that the molecule might have

whether or not atoms in the molecule have lone pairs of electrons.

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Explanation:

Relation between concentration and absorbance: Absorbance is directly proportional to the concentration of the substance. The higher the concentration, the higher its absorbance.

The relationship between absorbance of light by a solution and its concentration should be Linear

b) Linear

so that when concentration increases, absorbance Increases

c) Increases

The Beer-Lambert Law, also known as the Beer-Lambert-Bouguer Law, describes the relationship between the absorbance of light by a solution and the concentration of the absorbing solute in that solution. This law is fundamental in spectroscopy and is used to quantify the concentration of a solute in a solution.

The Beer-Lambert Law is expressed as:

A = ε * c * l

Where:

A is the absorbance of the solution (unitless),

ε is the molar absorptivity or molar extinction coefficient (a constant specific to the solute and the wavelength of light),

c is the concentration of the solute in the solution (usually in mol/L or M),

l is the path length of the light through the solution (usually in centimeters).

The relationship between absorbance of light by a solution and its concentration should be: Linear

so that when concentration increases, absorbance: Increases

In a linear relationship, the absorbance of light by a solution increases in direct proportion to the concentration of the solute in the solution. As the concentration of the solute increases, more light is absorbed by the solution, leading to a higher absorbance value.

Therefore, when the concentration of a solution increases, the absorbance of light by that solution also increases in a linear fashion.

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The complete question is:

The relationship between absorbance of light by a solution and its concentration should be ___

Choose:

a) Exponential

b) Linear

c) Inverse

so that when concentration increases, absorbance ___

Choose:

a) Does Not Change

b) Decreases

c) Increases

The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 4.00 mm pathlength cell, is 0.0282.

We'll start by figuring out the compound's molarity, which is determined by dividing the moles of solute by the liters of solution.

M = 0.00140/ 0.5000L = 0.00280M

Then, use the conversion formula 1 cm = 10 mm to convert 4.00 mm to cm.

4.00mm * 1cm/ 10mm = 0.400cm

Finally, we will use the Beer-Lambert equation to get the compound's absorbance.

A = E * b* C

where,

A: absorbance

ε: molar absorptivity

b: length of the light path

C: molar concentration

A = E * b* C

A =  25.2/ M.cm * 0.400cm * 0.00280M

A = 0.0282

The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 3 .00 mm pathlength cell, is 0.0282.

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The solvent will flow to the top of the TLC plate and the chemicals identified on the silica plate will travel farther than expected if the TLC plate is left in the developing chamber for an extended period of time.

That might lead to inaccurate Rf readings and the close-together spots colliding. With tweezers, remove the plate, and as soon as you can, pencil in the solvent front line.

If you wait too long, it will fade and you won't have all the data you need to figure out the Rf values.

There is no way to tell where the line should be drawn because the solvent front reached the top.

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The average kinetic energy depends on the mass and speed of the particles. At constant temperature, every gas molecules have the same average kinetic energy.

Kinetic energy is a form of energy generated by virtue of motion of an object. When the object is at rest the energy is stored in the form of potential energy whereas, when they start to move they gain a kinetic energy.

Average kinetic energy of a particle, depends on temperature by the equation :

K =  3/2 KT

Therefore it is independent of mass and speed of the particles. However the speed of ions at constant temperature will be different.

Hence, at constant temperature, the average kinetic energy of all the gases will be the same. Thus, option E is correct.

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Your question is incomplete. But your complete question probably was:

At a constant temperature, which of the gases will have the highest average

kinetic energy?

A) H2

B) N2

C) O2

D) F2

E) All the gases will have the same average

kinetic energy.

Xenon a noble gas shows the greatest deviation from the ideal gas law at high pressures.

Real gases behave very differently from ideal gases at high pressures or low temperatures. It's useful to be aware that the ideal gas law considers the size of gas molecules to be minimal or nonexistent.

Due to its size and the fact that it is the largest of the group, Xe is predicted to deviate from the ideal gas the most under conditions of high pressure or low temperature.

Van der Waal forces come into play as gaseous atoms or molecules grow closer to one another under high pressure and low temperature. As a result, atoms or molecules begin to attract one another. As a result, gas behaves the furthest from its ideal state. While in an ideal world there would be no intermolecular forces of attraction, we can assume that gases do not attract one another.

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Precipitate Ca₃(PO₄)₂ would be created by mixing sodium phosphate with calcium acetate.

When dissolved compounds react, they might produce one or more solid products in a process known as precipitation. Double displacement, double replacement, or metathesis reactions are some names for several of these processes, which frequently include the exchange of ions between ionic compounds in aqueous solutions.

Two soluble salts react to form precipitates, an insoluble salt.

The following equation illustrates the reaction between calcium acetate and sodium phosphate:

3Ca(C₂H₃O₂)₂ + 2Na₃PO₄ → Ca₃(PO₄)₂ +6NaC₂H₃O₂

The reaction produces Ca3(PO4)2, which is an insoluble salt and a precipitate.

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Hello..!

¿What is Cadenas tróficas?

Food chains are chains of living beings that inhabit a certain territory and that comply with the flow of

energy through your diet.

The term "buffer" refers to a solution's capacity to withstand pH fluctuations, even when additional bases or acids are introduced. Buffer has the ability to neutralize any acids or bases supplied to the system in order to stabilize it.

Equivalent molar ratios of KH2PO4 and K2HPO4 when combined with water result in the creation of buffer solution. A particular kind of dibasic salt is dipotassium phosphate. K2HPO4 is the solution that is created when hydrogen ions are added to K3PO4, and it functions as a conjugate acid. H2PO4 acts as a weak acid and HPO2 acts as a conjugate base of a in this system of buffers diluted acid . As a result, this KH2PO4 and K2HPO4 solution in water serves as a buffer.

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Option D.  Investigation 4, represents the statement from which investigation is an example of repetition.

Each is a repeated run of your combination of things and stages. Repetition does the replica runs consecutively even as replication does more than one run but throughout identical but special experimental runs. The investigation is a radical search for data, particularly the ones which are hidden or need to be sorted out in a complicated state of affairs. The intention of the research is commonly to decide how or why something befell.

Experimental investigations contain a procedure in which a "honest test" is designed and variables are actively manipulated, managed, and measured which allows you to collect proof to aid or refute a causal courting.

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Disclaimer:- your question is incomplete, please see below for the complete question.

Answer:

The correct option is the third statement (a solution with 10% solute and 90% solvent).

Explanation:

Reason for correct answer:

Reason for incorrect answers:

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The sequence of events that resulted in the end of reconstruction include:

The Reconstruction era was a period in American history  following the American Civil War (1861–1865) and lasting until approximately the Compromise of 1877—when the last federal troops were withdrawn from the South—where attempts were made to deal with the problems of readmitting the eleven states that had seceded from the Union and fought against it in the Civil War, and to redress the political, social, and economic legacies of slavery.

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And let us address the bottle capacity....and this is given by the product. We know that, 1ml= 10⁻³ L

126,515 × 0.335 L =   42382 .525 L and it is the the bottle capacity.

The number of bottles you need is given by

33500/ 0.355=  9436 Bottles and there are enough caps . The limiting quantity is the beverage and there are  reserve bottles and caps for the breakages and the failed seals that will undoubtedly occur.

Having brewed beer, ginger beer, or other beverages at home (and this is something that it is easy to do, and you get VERY good results). Most of the time, the bottles are the finite resource. You must gather, carefully clean, and disinfect each bottle.

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Ch3ho has a concentration (m) of 1.589 mol/dm3 in a solution.

Given our parameters, 230 ml per liter of solution and a mole of solutes equal?

that: mass/molar mass = moles of solutes

mass = 11.7g.

thus the formula for CH3OH's molar mass is C(12)+H(1*3) +O(16)+1 =32g.

11.7g/32g Equals 0.365 moles of solutes.

Great, now that we have the moles, we can now enjoy the molarity (concentration)

Molarity is equal to 0.365mol/230*10-3, which is 0.365mol/0.230L, or 1.589mol/dm3.

The formula for calculating molarity is molarity = number of moles of solute. litres of the solution. Since the volume of the solution will be measured in litres and the quantity of moles of solute is measured in mol. So, mol L – 1 is the unit of molarity.

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