2 PLS Question 2 Consider the chemical reaction: Fe3+ (aq)+ SCN (aq) Fe(SCN)2(aq) According to Le Chatelier's Principle, if the reaction is at equilibrium which of the following disturbance(s) will shift the reaction to the right? (There could be more than one correct answer, select all that are TRUE to receive credit) Increase the concentration of Fe3(aq) Decrease the concentration of Fe(SCN)2(aq) Increase the concentration of Fe(SCN)2(aq) Decrease the concentration of Feaq) Decrease the concentration of SCN () Increase the concentration of SCN'(),

Answer:

When the bell is rung the switch closes allowing electricity to flow making the hammer hit the bell, making the sound to alert people in the house.

Explanation:

Answer:

Convection

Explanation:

Convection is steam and the condensation of vapor.

Depending on the element's atomic number, fusion provides significantly more energy for lighter elements than fission does for heavier ones.

The term "binding energy" is the key to comprehending this. The combined mass of protons and neutrons in a nucleus, when they are held together by the strong force, is always less than the combined mass of the same number of unbound protons and neutrons.

The mass disparity is transformed into energy when two light nuclei combine to form a heavier nucleus. This means that to cause the nucleus to disintegrate, the same amount of energy must be added.

The issue is that a lot of energy is released when hydrogen and helium are fused together. Less energy is released when heavier elements are fused.

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2-Methyl-2,3-ethylbutane is an isomer of the alkane chemical family.

2-Methyl-2,3-ethylbutane belongs to the alkane chemical family, which consists of hydrocarbons with only single bonds between carbon atoms. The chemical structural formula of 2-methyl-2,3-ethyl butane is as follows:

 CH3       CH3

  |          |

CH3-C-CH2-CH2-CH3

In this molecule, there are five carbon atoms arranged in a linear chain, with two methyl (CH3) groups attached to the second carbon atom. Additionally, there is an ethyl (CH2CH3) group attached to the third carbon atom. The presence of only single bonds between carbon atoms and the absence of any functional groups classify it as an alkane.

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The gas constant is equal to R=8.314 J/mol K, while the atomic mass of helium is equal to M=4.0 g/mol. M = 4.0 g / m o l . As a result, the helium atom's rms speed is 1304.7 m/s. So, 515 m/sec is the root-mean-square speed.

The value of the square root of the sum of the squares of the stacking velocity values divided by the quantity of values is the root-mean square (RMS) velocity. The RMS velocity is the speed of a wave traveling along a certain ray path across subsurface strata with various interval velocities.

The expression v=sqrt(3RTM) and v=sqrt(3KTm), where R is the universal gas constant, T is the absolute (Kelvin) temperature, m is the molar mass, K is the Boltzmann's constant, and M is the molecular mass, gives the root mean square (R.M.S.) speed V of the molecules of an ideal gas.

Since the particles in a typical gas sample are flowing in all directions, the average velocity for that sample is zero, which is why we use the rms velocity instead of the average. This is an important formula since the particle velocity controls both the diffusion and effusion rates.

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Answer:

soapy water is not good for plants irrigation that is what I learn

Answer:

Soapy water is not good for plant irrigation because soapy water contains sulphate in it which is not good for the development of plants.

Explanation:

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The volume of carbon (iv) oxide measured at S.T.P. that is evolved when one mole of copper (ii) carbonate is heated to constant mass is 22.4 L.

The volume of carbon dioxide produced when one  mole of copper (ii) carbonate is heated to constant mass is given by the equation of the reaction given below;

CuCO₃ (s)  ----> CuO (s) + CO₂ (g)

The mole ratio of the reaction shown above is 1 : 1 for copper carbonate and carbon dioxide.

From the equation of the reaction, one mole of copper carbonate when heated to a constant mass produces one mole of carbon dioxide.

The volume of one mole of carbon dioxide is equal to the volume of one mole of a gas.

The volume of one mole of a gas at STP is 22.4 L

Hence the volume of carbon dioxide evolved is 22.4 L

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The balanced chemical reaction of the synthesis of ammonia (NH3) is:N2 + 3H2 → 2NH3The stoichiometry of the equation implies that 3 moles of hydrogen are required to react with 1 mole of nitrogen to produce 2 moles of ammonia. Therefore, the molar mass of NH3 is calculated by adding the molar mass of nitrogen to three times the molar mass of hydrogen.

The molar mass of NH3 = molar mass of N + 3(molar mass of H) = 28 + 3(2) = 34 g/mol.Using the stoichiometry of the balanced chemical reaction, the amount of hydrogen required for the synthesis of 1 mole of ammonia can be calculated using the ratio of the coefficients. Thus, 3 moles of H2 are needed for every 2 moles of NH3.

The number of moles of ammonia (NH3) required can be obtained by dividing the mass of ammonia required by its molar mass. So,Number of moles of NH3 = mass of NH3/molar mass of NH3= 350,000 g/34 g/mol= 10,294.12 molThe amount of hydrogen required is then calculated by using the mole ratio:moles of H2 = (3/2) moles of NH3= (3/2) × 10,294.12 = 15,441.18 molThe mass of hydrogen is then calculated by multiplying the number of moles by the molar mass of hydrogen:Mass of H2 = 15,441.18 mol × 2 g/mol= 30,882.36 g ≈ 30,882 kg≈ 30,882 kg of hydrogen will be required.

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KBr2 formula is correctly written because it represents a known ionic compound

what is ionic compound?

Ionic bonds are created when two ions, one positive and one negative, share electrons. Positive and negative ions have a strong attraction to one another, which frequently results in crystalline solids with high melting temperatures. When there is a significant variation in the electronegativity of the ions, ionic bonds rather than covalent bonds develop. In the formula for an ionic compound, the positive ion, known as a cation, is listed first, followed by the negative ion, known as an anion. The net charge or neutral electrical charge of a balanced formula is zero.

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The rate of pyruvic acid formation fluctuates due to several factors, including the availability of substrates, enzyme activity, and environmental conditions.

Pyruvic acid is a key intermediate in both anaerobic and aerobic metabolism. It is formed during glycolysis, a process that occurs in the cytoplasm of cells and involves the breakdown of glucose into pyruvic acid.

The rate of pyruvic acid formation can be affected by several factors, including the availability of substrates such as glucose, the activity of enzymes involved in glycolysis, and environmental conditions such as temperature and pH.

For example, if glucose levels are low, the rate of pyruvic acid formation will decrease. Similarly, if enzyme activity is inhibited due to the presence of inhibitors or changes in temperature or pH, the rate of pyruvic acid formation will be affected.

Additionally, in certain conditions such as exercise or hypoxia, the rate of pyruvic acid formation may increase as a result of increased demand for energy and the need for glycolysis to produce ATP.

Therefore, the rate of pyruvic acid formation can fluctuate depending on the specific conditions and factors influencing the process.

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Answer:

3.91 on Acellus

Explanation:

1.88 g potassium would be have been used to produce 10.32 g K2S, meaning that 6.41 g S would be left over.

The chemical element with the atomic number 19 and the letter K is potassium. Potassium is a silvery-white metal that may be easily and gently sliced with a knife. Within seconds of exposure, potassium metal quickly combines with air oxygen to produce flaky, white potassium peroxide.

Potassium can be obtained as a dietary supplement and naturally in many foods. Its primary function in the body is to support the maintenance of regular fluid levels inside our cells. It's opposite, sodium, keeps fluid levels within cells normal. Additionally, potassium supports proper blood pressure and aids in the contraction of muscles.

2K + S → K₂S

two moles K react with one mol S

6.41 g S react with K to formed 10.32g of K₂S

stoichiometric ratio of K:S is 2.44

reaction conditions your supplied ratio of K:S is 1.28

Therefore, sulfur is in excess and potassium is the limiting reagent.

The reaction of 6.41 g S would produce 10.32g K2S

The reaction of  6.41 g S would produce  6.41 (10.32/78.2) = 6.47 g K2S

Thus, 1.88 g K would be have been used to produce 10.32   g K2S, meaning that 6.41 g S would be left over.

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Answer:

Ten radish seeds were added to container A. Container B had no radish seeds. The purpose of the container B in this experiment is to serve as a control container.

By using controls, the experimenter can reduce the impact of factors other than the one being researched. This allows us to verify that an experiment is testing what it says it is testing. Controls are important for all sorts of experimental testing, regardless of the subject, and this goes beyond science.

Methylene blue is usually employed as a redox indicator in analytical chemistry. The solutions of this chemical are blue when in an oxidizing environment, but turn colorless when exposed to a reducing agent.

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Answer:

The answer is 2.53e-5

Formula units are there in 212 grams of MgCl₂ are 830.56

Formula is the empirical of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations and it is the lowest whole number ratio of ions represented in an ionic compound

Here given data is

MgCl₂ = 212 grams

1 mole of magnesium chloride has mass = 95.211 gram and contains 6.022×10²³formula units of magnesium chloride

Here 212 grams×6.022×10²³form unit of MgCl₂/95.211 gram = 830.56

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Answer:

Explanation:

1).  Ca(NO₃)₂ + KI → CaI + K(NO₃)₂

    This equation is incorrect.

    When Ca⁺⁺ reacts with I⁻, final product is CaI₂

    And when K⁺ react with NO₃⁻, final product is KNO₃

    Hence the equation will be,

    Ca(NO₃)₂ + KI → CaI₂ + KNO₃

    Now we have to balance this equation.

     Ca(NO₃)₂ + 2KI → CaI₂ + KNO₃

                          ↓

     Ca(NO₃)₂ + 2KI → CaI₂ + 2KNO₃

2). Ca(NO₃)₂ + KOH → CaOH + K(NO₃)₂

    This equation is incorrect,

    Since the reaction of Ca⁺⁺ with OH⁻ gives the final product     Ca(OH)₂

    And final product of K⁺ and NO₃⁻ is KNO₃

    Therefore, the equation will be,

    Ca(NO₃)₂ + KOH → Ca(OH)₂ + KNO₃

    Now we will balance this equation by changing the coefficients of the      molecules until the number of atoms on both the sides become equal.

    Ca(NO₃)₂ + KOH → Ca(OH)₂ + 2KNO₃

                                ↓

     Ca(NO₃)₂ + 2KOH → Ca(OH)₂ + 2KNO₃

3). Ca(NO₃)₂ + Na₂C₂O₄ → CaC₂O₄ + 2Na(NO₃)₂

    This equation is incorrect,

    Since the reaction of Na⁺ and NO₃⁻ gives the final product    NaNO₃.

    Therefore, the correct equation will be,

    Ca(NO₃)₂ + Na₂C₂O₄ → CaC₂O₄ + 2NaNO₃

     This equation is in the balanced form.

Answer:

B. Helium

Explanation:

Correct me if I'm wrong

Whenever an electron inside a hydrogen atom transitions from the n-2 towards the n-1 energy level, an ultraviolet kind of photon is released.

The negatively charged neutron star called an electron can either be free or attached to an atom (not bound). One of the three main types of particles in an atom is an electron that is attached to it; the other two were protons and neutrons.

The negatively charged components of an atom are called electrons. All of an atom's electrons combine to form a negatively charged that counteracts that positive charge of a protons inside the atomic nucleus. Compared to all the other components of the universe, electrons are incredibly tiny.

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Arsenic, hydraulic fracturing, lead, and PFAS present chemical threats to global drinking water supplies in different ways.

Let's discuss each of them in detail:

(a) Arsenic - The origin of arsenic exposure is natural deposits or contamination from agricultural or industrial practices. Human health consequences include skin, lung, liver, and bladder cancers. It can also lead to cardiovascular diseases, skin lesions, and neurodevelopmental effects. Drivers of continued exposure include poor regulation and monitoring. Modern solutions include rainwater harvesting and treatment.

(b) Hydraulic fracturing - Hydraulic fracturing involves using a mixture of chemicals, water, and sand to extract natural gas and oil from shale rock formations. The origin of exposure is contaminated surface and groundwater due to the release of chemicals from fracking fluids and other sources. Human health consequences include skin, eye, and respiratory irritation, headaches, dizziness, and reproductive and developmental problems. Drivers of continued exposure include lack of regulation and poor oversight. Modern solutions include alternative energy sources and regulation of the industry.

(c) Lead - Lead contamination in drinking water can occur due to corrosion of plumbing materials. Human health consequences include neurological damage, developmental delays, anemia, and hypertension. Drivers of continued exposure include aging infrastructure and poor maintenance. Modern solutions include replacing lead service lines, testing for lead levels, and implementing corrosion control.

(d) PFAS - PFAS (per- and polyfluoroalkyl substances) are human-made chemicals used in a variety of consumer and industrial products. They can enter the water supply through wastewater discharges, firefighting foams, and other sources. Human health consequences include developmental effects, immune system damage, cancer, and thyroid hormone disruption. Drivers of continued exposure include the continued use of PFAS in consumer and industrial products. Modern solutions include reducing the use of PFAS in products and treatment methods such as granular activated carbon.

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Answer:

London dispersion force

Explanation:

The main intramolecular forces between particles of carbon tetrafluoride (CF4) are London dispersion forces.

Carbon tetrafluoride is a nonpolar molecule, which means that it does not have a permanent dipole moment. However, the electrons in the molecule are not evenly distributed, and this creates a temporary dipole moment. These temporary dipole moments can interact with each other, which gives rise to London dispersion forces.

London dispersion forces are the weakest type of intermolecular force, but they are still important in determining the properties of carbon tetrafluoride. They are responsible for the low boiling point of carbon tetrafluoride, and they also play a role in its solubility in nonpolar solvents.

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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The final temperature of the mixture is 28.93°C

Data;

The underlying principle of transfer of heat is discussed in heat transfer which can be summarized as heat lost by a warmer body is equal to heat gain by a colder body. The formula of this can be written as

\(Q=mc\delta \theta\\\)

Heat Loss = Heat gain

\(m_1c_1(T_1-T_3)=m_2c_2(T_2-T_3)\\0.519*2.01*(105-T_3)=5.91*4.18*(16.7-T_3)\\109.53495-1.04319T_3=412.55346-24.7038T_3)\\1.04319T_3+24.7038T_3=412.55346-109.53495\\25.74699T_3=303.01851\\T_3=\frac{303.01851}{25.74699}\\T_3=11.77^0C\)

The final temperature is equal to

\(T_f = \delta vap - T_3\\T_f = 40.7 - 11.77\\T_f = 28.93^0C\)

The final temperature of the mixture is 28.93°C

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Answer:

It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs.

Explanation:

Answer:

Explanation:

The muscle that is contracted, it allows the lungs to fill with air through diaphragm muscle.

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Aldosterone promotes the reabsorption of sodium ions and the excretion of potassium ions in the kidneys, helping to maintain fluid and electrolyte balance in the body.

Aldosterone is a hormone produced by the adrenal glands that plays a crucial role in regulating fluid and electrolyte balance in the body. It acts primarily on the kidneys, where it promotes the reabsorption of sodium ions and the excretion of potassium ions. This process helps to maintain the balance of these electrolytes in the body.

When aldosterone is released, it binds to specific receptors in the cells of the distal tubules and collecting ducts of the kidneys. This binding stimulates the production of proteins that increase the reabsorption of sodium ions from the urine back into the bloodstream. At the same time, aldosterone enhances the excretion of potassium ions into the urine.

By increasing the reabsorption of sodium, aldosterone helps to retain water in the body, which helps to regulate blood volume and blood pressure. This is particularly important in situations where the body needs to conserve water, such as during dehydration or low blood pressure.

Imbalances in aldosterone levels can lead to various fluid and electrolyte disorders. Hyperaldosteronism, for example, is a condition characterized by excessive aldosterone production, which causes increased sodium retention and potassium excretion. This can lead to high blood pressure, fluid retention, and low potassium levels. On the other hand, hypoaldosteronism, which is a deficiency of aldosterone, can result in sodium wasting and potassium retention, leading to low blood pressure, dehydration, and high potassium levels.

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Aldosterone is a hormone that is secreted by the adrenal cortex and affects fluid and electrolyte balance in the body. Its primary function is to increase sodium reabsorption and potassium secretion in the kidneys. Aldosterone also stimulates the reabsorption of water along with sodium, which helps to maintain blood volume and pressure.

Therefore, the effects of aldosterone on fluid and electrolyte imbalances are: Aldosterone regulates sodium levels in the body. When sodium levels are too low, aldosterone is secreted to increase its reabsorption in the kidneys. This helps to maintain normal sodium levels in the blood, preventing hyponatremia. Aldosterone also regulates potassium levels in the body.

It promotes potassium secretion into the urine, which helps to maintain normal potassium levels in the blood, preventing hyperkalemia. Aldosterone regulates water balance in the body. It stimulates water reabsorption along with sodium, which helps to maintain blood volume and pressure. This helps to prevent dehydration and hypovolemia.

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Answer:

Most of the matter around us, however, consists of mixtures of pure substances. Air, wood, rocks and dirt are examples of such mixtures. Mixtures can be further classified as Homogeneous and Heterogeneous.

Answer:

a

Explanation:

A actual molecule of glucose contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.

Answer:

B.

Explanation:

Calcium Chloride would have a charge of +2

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