the addition of 0.3800 l of 1.150 m kcl to a solution containing ag and pb2 ions is just enough to precipitate all of the ions as agcl and pbcl2. the total mass of the resulting precipitate is 61.90 g. find the masses of pbcl2 and agcl in the precipitate.

The rate of temperature is the ratio of temperature difference to the difference in time. The rate of temperature for a  change of 68 F to 75 F from 7 am to 3 pm is 0.625 F/hr.

Temperature is the measure of overall heat of a body or a region. Temperature level of a body or a place vary according to the time and some other factors such as pressure, seasonal changes such as rain, wind etc.

At morning to afternoon time the rate of temperature will be higher and to evening there might occur a slight decline.

Given that the time changes from 7 am to 3 pm thus, rate of time is 8 hrs. Then the temperature changes from, 68 faraday to 75 faraday thus the difference in temperature is 75-68= 5 faraday.

Now, the rate of temperature is calculated by taking the ratio of change in temperature to the change in time as follows:

(5 Faraday) / 8 hrs. = 0.625 F/hr.

Therefore, the rate of temperature change is 0.625 F/hr.

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The Bronsted-Lowry acid-base theory clarifies what Svante Arrhenius were not able to explain in their theory of acids and bases regarding ammonia as -

Svante Arrhenius theory states that -

In order for a substance to release H⁺ or OH⁻ ions, it must contain that very ion. But, this does not explain the weak base ammonia NH₃.

In Bronsted-Lowry acid-base theory -

Acids are the proton donating group while bases are the proton accepting group.

Ammonia is a nitrogen and hydrogen inorganic compound. Ammonia is a gas which is colourles, it is strong, and has a pungent smell. Its chemical formula is NH₃.

Ammonia is a stable binary hydride. It is the most basic nitrogen hydride. It is a typical nitrogenous waste, specifically among aquatic organisms. It contributes to the nutritional requirements of terrestrial organisms. It acts as a forerunner to 45 percent of the food and fertilizers all over the world.

70% of ammonia with urea and di-ammonium phosphate, is used to create fertilizers. It is available in a variety of shapes and compositions. The pure ammonia is spread onto the ground.

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Each statment correct phrase is completed.

1- Conformers are organisms that do not regulate their internal condition to the environment that habitat.

2- A change is an organisms surrounding that causes the organisms to react is called a stimulus.

3- soil,water and weather are abiotic factors of habitat.

4-An ecosystem consist of all the living organisms in an area.

6- ecology is the study of how organisms interact with one another and with their physical environment.

7-The many different species live together in a habitat are called a community.

8-ecology is the study of organisms and how they interact with the environment around them.

9-organisms that eat producers are called primary consumer.

10-The physical aspects of habitat are called abiotic factors.

11-A place where paticular population of species lives is called it's habitat.

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Answer:

The bromine gas particles would diffuse from a high to low concentration and so move upwards.

Explanation:

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The mass of the water is 1580 g.

We know that the ideal gas equation can be used to obtain the number of moles of the gas. We have been told that the pressure of the gas reduced from  7.9 x 10-3 atm to  1.2 x 10-4 atm. The change in pressure can be used obtain the number of moles.

Change in pressure = 7.9 x 10-3 - 1.2 x 10-4 = 7.78 * 10^-3 atm

Using;

PV = nRT

n = PV/RT

n = 7.78 * 10^-3 atm *  2.4 x10^5 l/0.082 * (39 + 273)

n = 85 moles

Since 1 mole of carbon dioxide produces 1 mole of water

85 moles of carbon dioxide produces 85 mole of water

Mass of water produced = 85 mole  * 18 g/mol

= 1580 g

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If the molar volumes of liquid water and ice are 18.01 ml and 19.64 ml, respectively, then 1334 atm of pressure is required to melt ice at 10 C. 22.04 J/K is the entropy change process.

The term "molar" relates to the mole, which is the unit of concentration molarity and the number of moles in a liter of a solution. The phrase most frequently refers to the molar concentration of a solute in a solution in chemistry. The mol/L or M units of molar concentration are used. Molar also describes many molecular quantities including molar mass, molar heat capacity, and molar volume.

The most popular unit of measurement for molal concentration or molarity is moles of solute per liter of solution. It is defined as the amount of solute material per unit volume of solution, or per unit volume available to the species, and is denoted by the lowercase letter.

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The solution that is a buffer is a solution that is 0.100 M in HNO₂ and 0.100 M in NaNO₂  .

A weak acid and its conjugate base, or a weak base and its conjugate acid, must be combined to create a buffer solution. Only HNO2 (Weak Acid) and NaNO2 are included in the list as an acid and its conjugate base (Conjugate Base). Given that all concentrations are equivalent, the pH of this solution would be the same as the pKa of HNO2 (3,15).

Acids that don't entirely dissociate in solution are referred to as weak acids. In other words, any acid that is not a strong acid qualifies as a weak acid. The amount of dissociation determines how strong an acid is; the more dissociation, the stronger the acid.

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Answer:

235

Explanation:

The noble gases are known to be nonreactive because they have an already filled outer electron shell.

The noble gases is defined as those elements that are located at the group 8 of the periodic table which are also called inert gases.

Examples of six noble gases include the following:

The features of noble gases include the following:

The noble gases are non reactive because the outer atomic shells of these gases are filled up that is to say that they have a full Valence electron shell.

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yes, the equivalence point would change as acetic acid is a weak acid and dissociates partially but hydrochloric acid is a strong acid and dissociates completely.

Equivalence and endpoint differ primarily in that the former refers to the point at which a chemical reaction ends and the latter, to the time at which a system's color changes.

When enough titrant has been administered to entirely neutralize the analyte solution in a titration, this is known as the equivalence point. The titrant (standard solution) has a molecular weight that is equal to the moles of the solution with the unknown concentration.

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Answer:

A + B = C reaction decreases as time passes and the reactants get used up. r = -kAB during reaction A converts 2x while B converts x to form 3x of C let's say y = C y = 3x amount of reactants not converted yet , for A: 100 - 2x for B: 50 - x variatio

Explanation:

Molarity :

The number of moles of solute per liter of solution is known as molarity or molar concentration. It is used to express the concentration of a given solute in a solution.

It can be calculated using the formula, Molarity = [tex]\frac{number-of- moles-of-solute}{Volume-of-the-solution-in-liters}[/tex]

Given data:

Molarity of the solute, copper(III) sulfate  = 1.25 M

Volume of the solution = 670 mL = 0.67 Liters

Then, Molar mass of the solute,  = 415.2 g/mol

Then, number of moles of solute =  Molarity x Volume of solution

                                                        = 1.25 x 0.67 = 0.8375 moles.

Then, Mass of the solute  

=  Molar mass of solute x number of moles of solute

= 415.2 g/mol x 0.8375 mol = 347.73 g.

Therefore, the mass of solute in grams required are  = 347.73 g

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Answer:

The answer is color, temperature, turbidity, taste, and odor.

A hiker climbs to the top of a mountain at rate of 0.5 m/hr. The speed of hiker is 1.3 x 10⁻⁴ m/s and the velocity of the hiker is 1.3 x 10⁻⁴ m/s west.

Speed is a scalar quantity. It is used to measure the distance traveled in a period of time. It is represented by -

s = d/Δt

where,

s = speed

d = distance

Δt = change in time

Velocity is a vector quantity. It is used to measure the change in position, that is, displacement over the change in time. It is represented by -

v = Δs / Δt

where,

v = velocity

Δs = change in position/displacement

Δt = change in time

The standard unit of velocity and speed both is m/s.

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The measure of average kinetic energy of molecules is called tempreture.

What is kinetic energy ?

kinetic energy is a form of energy that an particle has by reason of it's motion.

If we want to accelerate an object then we must apply a force .

The average of all kinetic energy the molecule assumed to be directly proportional to the absolute tempreture of the gas.

The Kelvin tempreture of a substance is directly proportional to the average kinetic energy of the particles of the substance.

This is the reason why measure of the average kinetic energy of the molecule of a material called tempreture.

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The pH of the solution is 7.94 if the concentration of the tris acid is 0.200m and the concentration of the conjugate base is 0.150m.

The pH of this buffer can be calculated using the Henderson-Hasselbalch equation according to which the pH is equal to the sum of the pKa value and the log of the concentration of conjugate base divided by the concentration of the weak acid.

This equation can be represented as;

pH = pKa + log ([conjugate base] ÷ [weak acid])

Substituting the given values into this equation to find the pH;

pH = 8.06 + log([0.150] ÷ [0.200])

pH = 8.06 + log(0.75)

pH = 8.06 + (-0.125)

pH = 7.94

Therefore the pH of this solution is calculated to be 7.94.

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In a parallel circuit with identical light bulbs, the statement D is true. D Adding more identical light bulbs will not change their brightness.

A parallel circuit has two or more paths for modern to waft through. Voltage is equal across everything of the parallel circuit. The sum of the currents thru each route is equal to the entire modern that flows from the supply.

A parallel circuit has one feature: to preserve the power flowing while one pathway is interrupted. A top instance is mild furnishings that use more than one mild bulb. when an unmarried bulb within the fixture goes the light fixture maintains to operate.

In a chain circuit, the modern-day thru every one of the additives is the same, and the voltage across the circuit is the sum of the voltages throughout every issue. In a parallel circuit, the voltage across every one of the components is equal, and the total cutting edge is the sum of the currents via each element.

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The element whose isotope is represented as  [tex]_{6}^{14}X[/tex] is carbon -14. The atomic number of carbon is 6 and the mass number for the given isotope is 14 amu.

Isotopes are atoms of same element with different  mass numbers. Isotopes slightly changes in chemical and physical properties between each other.

Almost elements in the periodic table are having isotopes. However not all of them are stable. Some of them for heavy metals are radioactive isotopes and are not stable.

The isotope is represented by showing mass number in top of the symbol and atomic number at the bottom. The atomic number 6 corresponds to carbon. Hence, option A is correct. Carbon -14 isotope is given here.

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Answer:

(a) 55 kJ of heat are released when 1 mol of reactant A is used;

(b) 110 kJ of heat are released when 2 moles of reactant A are used;

(c) 27.5 kJ of heat are released when 1 mol of reactant B is used;

(d) 55 kJ of heat are released when 2 moles of reactant B are used.

Explanation:

The question requires us to determine the amount of heat released when the given amounts of reactants are used, considering the following balanced chemical equation:

When the enthalpy change for a reaction (or heat of reaction, ΔH) is given in units of energy, such as kilojoules (kJ), and not units of energy per mol (such as kJ/mol), we can consider that ΔH corresponds to the heat absorbed or released for the molar quantities of reactants as given in the balanced chemical equation. In the case given by the question, for example, we can say that 55 kJ of energy are released when 1 mol of A reacts with 2 moles of B.

Therefore, we can use the molar quantitites from the balanced chemical equation as a reference to determine the amount of heat released when different amounts of reactants are used.

Considering the information above, we can calculate:

(a) heat released when 1 mol of A reacts:

Note that 1 mol of A corresponds to the amount of reactant A given by the balanced chemical equation. Therefore, 55kJ of energy are released when 1 mol of A is used.

(b) heat released when 2 moles of A reacts:

Note that 2 moles of A corresponds to the double of the amount of reactant A given by the balanced chemical equation. Thus, we must multply ΔH by 2: 55 kJ x 2 = 110 kJ of energy are released when 2 moles of A are used.

(c) heat released when 1 mol of B reacts:

Note that 1 mol of B corresponds to half of the amount of reactant B given by the balanced chemical equation. Thus, we must divide ΔH by 2: 55 kJ / 2 = 27.5 kJ of energy are released when 1 mol of B is used.

(d) heat released when 2 moles of B reacts:

Note that 2 moles of B corresponds to the amount of reactant B as given by the balanced chemical equation. Therefore, 55 kJ of energy are released when 2 moles of B are used.

The molar heat capacity at a constant volume for this gas is 15.90 J/(K⋅mol) if 3.4 moles of this gas require 454 j of energy to raise its temperature by 8.4 k.

The molar heat capacity can be calculated by using the formula;

molar heat capacity = C / n

where C represents the heat capacity

n represents moles

The heat capacity of this gas can be calculated as follows;

heat capacity = E / T

here, E represents the amount of heat energy supplied

T represents the change in temperature

Substituting the given values in the heat capacity formula;

heat capacity = 454 / 8.4

heat capacity = 54.05

Now we substitute this calculated value of heat capacity in the formula of molar heat capacity;

molar heat capacity = C / n

molar heat capacity = 54.05 / 3.4

molar heat capacity = 15.90

Therefore, the molar heat capacity for this gas at constant volume is calculated to be 15.90 J/(K⋅mol).

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The group of Neon is Group 8A and the family of it is noble gases or inert gases of the periodic table and includes helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

The term for these noble gas elements derives from their almost complete lack of reactivity with other elements or compounds. In reality, 1% of the atmosphere is made up of argon, which is present in the atmosphere in tiny proportions. Helium may also be found in natural gas reserves. The Group 8A elements are all colorless, odorless, monoatomic gases in their elemental state at ambient temperature. 

Because the Group 8A elements contain a whole octet of eight valence electrons in their highest-energy orbitals ([tex]ns^{2}np^{6}[/tex]), they have a very low propensity to gain or lose electrons as covalent bonds allow atoms to exchange electrons to create ions or share electrons. Although it takes particular circumstances, they may be made to combine with other elements to produce compounds.

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The  statement one is incorrect because the elements in periodic table has some similarities between them they are not completely different from each other.

The difference in stability between the electron configurations of metals as atoms and as ions is what causes metals to be reactive. Since they are all metals, when they interact, positive ions are produced.

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Water's physical characteristics include its liquid state at ambient temperature and density of 1.0 g/cm3. Water has the ability to divide into hydrogen and oxygen and react with some metals, among other chemical features.

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When the balloon is taken outside where the temperature is –9 °C, then the final volume becomes 19.3 L

From the question given above, the following data were obtained:

Initial volume (V₁) = 20.9 L

Initial temperature inside the shed (T₁) = 13 °C = 13 + 273 = 286 K

Final temperature inside the shed (T₂) = –9 °C = –9 + 273 = 264 K

As we know pressure remains constant so Pressure = constant

The final volume (V₂) =?

By using the Charles law equation, we can obtain the final volume i.e. V₂

[tex]\frac{V1}{T1}[/tex]  =  [tex]\frac{V2}{T2}[/tex]

[tex]\frac{20.9}{286}[/tex]  = [tex]\frac{V2}{286}[/tex]

Now cross multiply both sides

V₂ × 286 = 20.9 × 264

V₂ × 286 = 5517.6

Divide by 286 on both sides of the equation

[tex]V_{2}[/tex] = [tex]\frac{5517.6}{286}[/tex]

V₂  = 19.3 L

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The complete question is:

An arctic weather balloon is filled with 20.9L of helium gas inside a prep shed. The temperature inside the shed is 13 degrees C. The balloon is then taken outside, where the temperature is -9 degrees C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Round your answer to significant digits.

The word "however" from the passage from Sue Macy's book Wheels of Change denotes a shift in strategy. As a result, Option D is the appropriate statement.

What does Wheels of Change's theme entail?

The narrative "Wheels of Change" has as its central message that you should no longer be frightened to speak up for yourself and other people. This was demonstrated as girls' racing gained popularity.

Cycling has gotten more violent, and males have developed a strong concern about girls getting their rights. The Springfield Bicycle Club was established in 1881. While giving back to the community, Wheels of Change empowers citizens, boosts self-esteem, AND offers worthwhile transitional work. For $13/hour, Wheels of Change offers temporary jobs to people staying at the Temporary Bridge Shelter program run by Alpha Project.

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Asexual reproduction prevents genetic variation within a species since it ensures that all offspring have an identical copy of the parent's DNA unless a mutation arises in the duplicate DNA that is produced.

Sexual and asexual reproduction are the two options. In sexual reproduction, there are two parents. However, only one parent is engaged in asexual reproduction. In this, offspring of a single parent are genetically identical to the parent. Offspring are physically and genetically similar to their parents. They are a clone or exact replica of the parent. Asexual reproduction doesn't involve any genetic material being recombined.

Thus, the person created by asexual reproduction does not exhibit variety or genetic variability.

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Answer:

3.2 x 10-3 3.2 x 10-12 3.2 x 10-2 11.5

Explanation: