When the pressure is increased on the following system at equilibrium, 3 H2(g) + N28) =2 NH3(g), by adding a positive pressure of inert Argon gas, A. No change occurs B. In order to restore equilibrium, the reaction shifts right, toward products C. In order to restore equilibrium, the reaction shifts left, toward reactants D. None of the above

The ratio of buffer C₂H₃O₂ /HC₂H₃O₂  must you use are1:0.199 or 10:2

the ratio of buffer C₂H₃O₂ /HC₂H₃O₂  can be calculate using the Henderson-Hasselbalch Equation which relates the pH to the measure of acidity pKa. The equation is given as:

pH = pKa + log ([base]/[acid]

Where,

[base] = concentration of C₂H₃O₂in molarity or moles

[acid] = concentration of HC₂H₃O₂ in molarity or moles

For the sake of easy calculation, allow us to assume that:

[base] =1

[acid] = x

Therefore using equation 1,

5.44 = 4.74 + log (1 / x)

log [base / acid] = 0.7

1 / x = 5.0118

x = 0.199

The required ratio of buffer C₂H₃O₂ /HC₂H₃O₂ is 1:0.199 or 10:2

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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The slowest mass wasting process is creep.

Creep, a gradual and unhurried movement of soil or rock down an incline, ensues due to the relentless pull of gravity and the ceaseless cycle of freezing and thawing of water. This insidious process may transpire at such a languid pace that it eludes physical eye's scrutiny, yet over time, it can inflict significant harm upon structures and infrastructure.

Mass wasting, a natural phenomenon, can be further compounded by human activities. Alterations in land usage, such as deforestation and construction, have the potential to amplify the vulnerability to mass wasting. It is imperative to remain cognizant of the perils associated with mass wasting and adopt appropriate measures to mitigate these risks.

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Answer:

ummm i need help too lol

Explanation:

As compared to simply boiling the mixture in an open flask, it is necessary to heat under reflux for this reaction because: During a reflux, the volatile solvent that evaporates from the reaction mixture condenses back into the reaction flask, allowing the reaction mixture to stay at a constant temperature.

During the reaction, a side product, water, is formed. Boiling in an open flask would cause the water to evaporate along with the solvent, leading to a lower yield of the desired product. In comparison, refluxing allows the water to condense and remain in the reaction mixture, ensuring that the reaction proceeds as intended and that the yield of the desired product is high. Aside from the aforementioned reasons, it is necessary to heat under reflux for this reaction since refluxing allows the reaction to proceed to completion. When the solvent vaporizes, the vapor carries with it the product, which condenses back into the flask due to the condenser's cooling effect. This allows the reaction to proceed to completion, resulting in a higher yield of the desired product. This technique also prevents the product from overheating, preventing its decomposition or degradation.

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Answer:

lava

Explanation:

One of the three goals of environmental science, as proposed by various texts, is to understand how natural systems function.

This involves studying the interrelationships between living organisms and their environment, including the physical, chemical, and biological processes that shape the world around us. By gaining a deeper understanding of how these systems work, environmental scientists can develop better ways to manage and protect natural resources, minimize environmental impacts, and promote sustainable development.

Other goals of environmental science include identifying and addressing environmental problems, such as pollution and climate change, and finding solutions to these issues through scientific research and policy development.

Ultimately, the overarching goal of environmental science is to promote a healthier, more sustainable planet for all living beings.

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The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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Answer:

The theoretical yield is calculated from the amount of the limiting reactant present.

Explanation:

Some terms to know:

Since the actual yield is based on realistic factors that we cannot control, it cannot be calculated, which gets rid of the first 2 options.

The limiting reactant is the one that affects the reaction, and therefore, it will be the one that determines how much product is produced. Thus, the theoretical yield is calculated from the amount of the limiting reactant present.

Hope this helps!

Answer:

hypothesis testing is usually used to assess the plausibility of a hypothesis by using sample data

Explanation:

The percentage by mass of the active ingredient (calcium carbonate) in the antacid tablet weighing 1.36 g and containing 520 mg of calcium carbonate is approximately 38.24%

To calculate the percentage by mass of the active ingredient (calcium carbonate) in the antacid tablet, we need to determine the ratio of the mass of calcium carbonate to the total mass of the tablet and express it as a percentage.

Convert the mass of calcium carbonate from milligrams to grams:

  Mass of calcium carbonate = 520 mg = 520 mg * (1 g / 1000 mg)

  Mass of calcium carbonate = 0.520 g

Determine the percentage by mass of calcium carbonate:

  Percentage by mass = (Mass of calcium carbonate / Total mass of tablet) * 100

  Total mass of tablet = 1.36 g

  Percentage by mass = (0.520 g / 1.36 g) * 100 = 38.24%

Therefore, the antacid tablet contains approximately 38.24% of the active ingredient, calcium carbonate.

In conclusion, the percentage by mass of the active ingredient (calcium carbonate) in the antacid tablet weighing 1.36 g and containing 520 mg of calcium carbonate is approximately 38.24%.

This calculation provides an indication of the concentration or relative amount of the active ingredient present in the tablet.

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Answer:

The correct answer is (1). Zn has the highest electronegativity of all the metals in its column. It has a strong attraction for electrons and low ionization potential, so if potassium chloride were used instead of hydrochloric acid, potassium would react most readily.

Explanation:

This question is asking which metal will react most readily. According to the activity series, alkali metals are more reactive than alkaline earth metals. Magnesium has the lowest outer electron configuration of all the metals in its row on the periodic table so it will have a strong attraction for electrons. The magnesium atom therefore requires less energy to reach an outer energy level so it has the lowest first ionization potential. Therefore, magnesium will react most readily with HCl.

Answer:

The correct option is;

Group 12

Explanation:

A metallic element that is shiny and silver colored that can exist in the +1 and +2 ionic states and  which forms a bright red compound with sulfur is mercury, Hg

The compound formed between mercury and silver is one of the earliest synthetic compound also known as vermilion and cinnabar. The bright red pigment of the HgS is used widely and is one of the most favorite pigment found in medieval European outstanding works of arts and in Chinese decorated wares made of lacquer as well as in mesoAmerica.

Answer:

12

Explanation:

HCl>H2S>PH3

Explanation:

Acidity is directly proportional to non metallic character. as we move in period (i.e. from left to right) non metallic character increases hence acidic strength increases.

The order of the acidic strength from strongest to weakest: HCl > H₂S > PH₃. Therefore, option (a) is correct.

The acidic strength measures the ability of the acid to lose its H⁺ ion. In general dissociation of acid can be shown as:

HA  →  H⁺ + A⁻

Some examples of strong acids are hydrochloric acid, perchloric acid  (HClO4), sulfuric acid (H2SO4), etc.

For the given acids, with the increase in the electronegativity from phosphorous to chlorine in the period. The bond pair of electrons attract more strongly by the electronegative atom.

Due to this, the weaker bond can easily donate the proton. Hence, HCl has a greater tendency to liberate proton (H⁺) than phosphine (PH₃). After dissociation,  the anion can be easily stabilized by a more electronegative Chlorine atom.  

Therefore, the order of acidic strength for the given acids is HCl> H₂S > PH₃.

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The molar mass of insulin is approximately 0.798 g/mol, calculated using the equation for osmotic pressure and the given values of mass and volume.

To calculate the molar mass of insulin, we can use the equation for osmotic pressure:

π = (n/V)RT

where π is the osmotic pressure, n is the number of moles of solute, V is the volume of the solution in liters, R is the ideal gas constant, and T is the temperature in Kelvin.

First, convert the given values to appropriate units:

25.0 mg = 0.025 g
5.00 mL = 0.005 L

Next, rearrange the equation to solve for n (number of moles):

n = (πV) / (RT)

Substituting the given values:

n = (15.5 mmHg * 0.005 L) / ((0.0821 L·atm/(mol·K)) * 298 K)

Calculate n:

n ≈ 0.0313 mol

Finally, divide the mass of insulin (0.025 g) by the number of moles (0.0313 mol) to find the molar mass:

Molar mass = 0.025 g / 0.0313 mol

Molar mass ≈ 0.798 g/mol

So, the molar mass of insulin is approximately 0.798 g/mol.


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Answer: C.) 446 g NaCl.

Explanation:

c.) 446 g NaCl. This is because 4.75 moles of NaCl is equal to 446 grams. This is calculated by multiplying the molar mass of NaCl (58.44 g/mol) by 4.75 moles. Hence, the answer is 446 g NaCl.

Answer:

1.3 is the value with the lowest sig figs in your question. So we have 2 sig figs.

4568/1.3 = 3513.84615

Now let's change the answer in sig figs.

We know that trailing zeros don't actually count as part of sig figs.

So we can round the answer to 3500, having the 2 sig figs (3 and 5) while the trailing zeros don't count.

Final answer = 3500

Answer:

yes

Explanation:

48.90% yield is produced in the given reaction

What is yield of a reaction?

The quantity of moles of a product created in relation to the amount of reactant consumed during a chemical reaction is measured in chemistry as yield, also known as reaction yield.

One of the most important aspects of organic and inorganic chemical synthesis that researchers must take into account is yield.  The terms "yield," "conversion," and "selectivity" are used in chemical reaction engineering to describe ratios of how much of a reactant was consumed (conversion), how much of the desired product was formed (yield), and how much of the undesired product was formed (selectivity), represented as X, Y, and S.

Hence, 48.90% yield is produced in the given reaction.

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Answer:

Acid rain's effect on stone is a chemical change.

Explanation:

Acid rain has hydrochloric acid which reacts with the calcium carbonate in the stone.

I hope this helps. (Sorry if i am wrong)

A gold nucleus has a radius of 7.3×10⁻¹⁵ m and a charge of +79e has a potential of 5.11 × 10⁶ V

Using conservation of energy :

2e × V - k × 2e × 79e/(1.5  × 10⁻¹⁴ + 7.3  × 10⁻¹⁵) = 0

2 ×  1.602  × 10⁻¹⁹ × V - 9 × ×10⁹ × 2 × (1.602 × 10⁻¹⁹)² × 79/(1.5 × 10⁻¹⁴ + 7.3 × 10⁻¹⁵) = 0

                   V = 5.11 × 10⁶ V

The decision and practice of using less energy is energy conservation. Switching off the light when you leave the room, turning off machines when they're not being used and strolling as opposed to driving are instances of energy preservation.

As indicated by the law of preservation of energy, energy can't be made or obliterated. However, it is capable of transforming into a variety of forms. At the point when all types of energy are thought of, the absolute energy of a disconnected framework stays steady.

Incomplete question:

A Gold Nucleus Has A Radius Of 7.3×10⁻¹⁵m And A Charge Of +79e. Through What Voltage Must An Α-Particle, With Its Charge Of +2e, Be Accelerated So That It Has Just Enough Energy To Reach A Distance Of 1.5×10⁻¹⁴ M From The Surface Of A Gold Nucleus? (Assume The Gold Nucleus Remains Stationary And Can Be Treated As A Point Charge.)

A gold nucleus has a radius of 7.3×10⁻¹⁵ m and a charge of +79e.

Through what voltage must an α-particle, with its charge of +2e, be accelerated so that it has just enough energy to reach a distance of 1.5×10⁻¹⁴ m from the surface of a gold nucleus? (Assume the gold nucleus remains stationary and can be treated as a point charge.)

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The hybrid orbital used by nitrogen to overlap with the 1s orbital of hydrogen in CH3NH2 is sp3.

In CH3NH2, nitrogen (N) forms three sigma bonds and has one lone pair of electrons. To accommodate these bonding arrangements, nitrogen undergoes hybridization, which involves mixing of atomic orbitals to form a set of hybrid orbitals with the appropriate geometry.

In the case of nitrogen in CH3NH2, it forms three sigma bonds with three hydrogen atoms and has one lone pair of electrons. This suggests that the nitrogen atom is surrounded by four regions of electron density, which corresponds to sp3 hybridization.

The sp3 hybridization results from the mixing of one 2s orbital and three 2p orbitals of nitrogen. This hybridization produces four sp3 hybrid orbitals oriented in a tetrahedral arrangement around the nitrogen atom. One of these hybrid orbitals overlaps with the 1s orbital of a hydrogen atom to form a sigma bond.

Therefore, the hybrid orbital used by nitrogen to overlap with the 1s orbital of hydrogen in CH3NH2 is sp3.

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Answer:

26.2g = Mass of water in the calorimeter

Explanation:

The heat absorbed for the water is equal to the heat released for the metal. Based on the equation:

Q = m*C*ΔT

Where Q is heat, m is the mass of the sample, C is specific heat of the material and ΔT is change in temperature

Replacing we can write:

\(m_{metal}*C_{metal}*dT_{metal}=m_{water}*C_{water}*dT_{water}\)

13.9g * 0.449J/g°C * (54.2°C-15.6°C) = m(H₂O) * 4.184J/g°C * (15.6°C-13.4°C)

240.9J = m(H₂O) * 9.2J/g

The current model for how the proton motive force generated by electron transport is used to drive the ATP synthesis reaction involves the movement of protons across a membrane. As electrons are passed along the electron transport chain, protons are pumped from the matrix into the intermembrane space. This creates a concentration gradient of protons, with more protons in the intermembrane space than in the matrix. The protons then flow back into the matrix through a protein complex called ATP synthase, which is embedded in the inner mitochondrial membrane. This flow of protons generates a force that drives the rotation of ATP synthase, which catalyzes the synthesis of ATP from ADP and inorganic phosphate. In this way, the proton motive force is used to drive the synthesis of ATP, which is the main source of energy for cellular processes.

The current model for how the proton motive force generated by electron transport is used to drive the ATP synthesis reaction can be explained through the following steps:

1. Electron transport: During cellular respiration, electrons are transferred through a series of protein complexes in the inner mitochondrial membrane, called the electron transport chain (ETC).

2. Proton gradient: As electrons pass through the ETC, protons (H+) are pumped from the mitochondrial matrix into the intermembrane space, creating a concentration gradient and an electrochemical potential difference across the membrane. This gradient and potential difference constitute the proton motive force.

3. ATP synthesis: The proton motive force drives protons to flow back into the mitochondrial matrix through a protein complex called ATP synthase. As protons move through ATP synthase, the enzyme undergoes conformational changes that catalyze the synthesis of ATP from ADP and inorganic phosphate (Pi). This process is known as chemiosmosis.

The proton motive force generated by electron transport is harnessed by ATP synthase to drive ATP synthesis, converting the electrochemical energy stored in the proton gradient into chemical energy in the form of ATP.

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Answer:

3.6 x (10^2) atm =  273 600 torr

Explanation:

Hope that helps

Answer:

Some cells, such as the frog egg cells shown here, divide every 30 minutes, and others take as long as a year! The table below compares the length of different cell cycles. 2. With each cell cycle, two cells form from one cell.

After 3 hours, the number of cells formed from one frog egg cell has been 64.

The division of the frog cell occurs every 30 minutes. Thus in 3 hours, the number of divisions occurs:

30 minutes = 1 division

3 \(\times\) 60 minutes = \(\rm \dfrac{1}{30}\;\times\;180\)

= 6 divisions.

The number of cells formed after n divisions can be given by = \(\rm 2^n\)

where n is the number of division cycles.

The number of cells after 6 division cycles = \(\rm 2^6\)

The number of cells = 64.

After 3 hours, the number of cells formed from one frog egg cell has been 64.

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Answer:

61.39%

Explanation:

The percent yield of a substance can be calculated using the formula:

Percent yield = actual yield/theoretical yield × 100%

Based on the information provided on the reaction in this question, the theoretical yield is given as 99.2g while the actual yield is given as 60.9g.

Hence, the percent yield is calculated thus:

% yield = 60.9/99.2 × 100

% yield = 0.6139 × 100

% yield = 61.39%

The percent yield is 61.39%

Atomic weight of metal : 24

Proust states the Comparative Law that compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements

Divalent metal oxide=XO

MW O = 16

MW XO₂ =  X+16

\(\tt \%mass=\dfrac{Ar~X}{X+16}\times 100\%\\\\0.6=\dfrac{X}{X+16}\\\\0.6(X+16)=X\\\\0.6X+9.6=X\\\\0.4X=9.6\rightarrow X=24\)