will the reagents listed below be used to test for cations or anions? oxalate is used to test for cations silver nitrate (with thiosulfate) is used to test for anions barium nitrate is used to test for anions hydroxide is used to test for cations

The expected potential measurement after adding 30.0 ml of 0.10 M Fe3+ titrant to 25 ml of 0.050 M Sn2+ is not possible to determine without additional information, such as the standard reduction potential of the reaction or the half-cell potentials of the electrodes.

To determine the potential of a redox reaction, one needs to know the standard reduction potential of the reaction or the half-cell potentials of the electrodes.

The measured potential will depend on the concentrations of the reactants and products and the conditions of the electrode surfaces. Therefore, without additional information about the experimental setup, it is not possible to accurately predict the potential measurement.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer:

1. D

2. A

3. This question doesn't make sense

4. D

5. B or C

Explanation:

Answer: Which is conduction?

energy transfer by direct contact

What is a chemical reaction system?

the reactants and products in a reactionIn photosynthesis within one plant, other plants would be considered the ___

surrounding

The products of a particular reaction have more energy than the reactants. Which type of reaction has occurred?

endothermic

Which type of reaction is occurring during a fireworks show? How do you know?

It is an exothermic reaction. Fireworks are bright, indicating a release of light energy.

Explanation: just did the quick check got 100%

When two protons fuse together in the first step of the proton-proton chain, they produce a deuterium nucleus, which consists of one proton and one neutron.

This fusion reaction is known as proton-proton fusion and is the primary process that powers the Sun and other stars.

The reaction can be represented in this way: 2 protons -> deuterium nucleus + positron + neutrino.

The release of a positron (a positively charged electron) and a neutrino is also involved in this fusion process.

The deuterium nucleus formed in this step then participates in subsequent reactions within the proton-proton chain to produce helium nuclei and release energy.

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Answer:

2.3 / yes

Explanation:

edg 2020

Answer: 2.3 and yes

Explanation:

The two ways in which the physical state of matter can be changed are melting and freezing.

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Answer:

Single displacement (Substitution)

Explanation:

7.36 grams of the radioactive substance will remain 2 years from now.

We can use the radioactive decay formula to determine how much of the radioactive substance will remain in 2 years:

N = N0 ×\(e^{- λt}\)      

Where N is the amount of the substance remaining after time t, N0 is the initial amount of the substance, λ is the decay constant, and e is the mathematical constant approximately equal to 2.71828.

If we assume that the decay is exponential and use the fact that the substance has decayed from 9 grams to 8 grams over 2 years, we can estimate the decay rate as follows:

8 = 9 ×  \(e^{-λX2}\)

Dividing both sides by 9, we get:

 \(e^{-λX2}\) = 8/9

Taking natural logarithm of both sides, we get:

-λ×2 = ln(8/9)

Solving for λ, we get:

λ = -ln(8/9)/2

λ ≈ 0.0585 (rounded to four decimal places)

Now we can use the radioactive decay formula to determine how much of the substance will remain in 2 years:

N = 8 × \(e^{-0.0585X2}\)

N ≈ 7.36 grams (rounded to two decimal places)

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--The given question is incomplete, the complete question is

"Two years ago there were 9 grams of a radioactive substance. now there are 8 grams. how much will remain 2 years from now?"--

Answer: C: Converted into another form

Explanation: pues es esa calale y si va a hacer

During a chemical or physical change, energy is converted to another form. Energy cannot be created or destroyed. During a chemical reaction, physical change the energy and mass are conserved.

According to the law of conservation of energy energy can neither be crated nor be destroyed. Hence, the total energy of a system is always conserved.

However, energy can be transformed from one form to the other. Therefore, the energy lost in one form is gained in another form. For example, in all electrical devices, the electrical energy is converting to other forms of energy such as light, thermal , mechanical etc.

Similarly, during a chemical reaction, the energy released by a reaction system is equal to the energy absorbed by other reacting system. Similarly in electrochemical cells the chemical energy is converting to electrical energy.

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The camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.

To calculate the amount of protein the camel consumed, we need to consider the dry matter basis of the hay. Here's how you can calculate it:

Calculate the dry matter weight of the hay:

Dry Matter Weight = Total Weight of Hay × Dry Matter Percentage

Dry Matter Weight = 18.3 kg × (83.4/100)

Dry Matter Weight = 18.3 kg × 0.834

Dry Matter Weight = 15.2442 kg

Calculate the protein content in the dry matter;

Protein Content = Dry Matter Weight × Protein Percentage

Protein Content = 15.2442 kg × (14.7/100)

Protein Content = 15.2442 kg × 0.147

Protein Content = 2.2414194 kg

Therefore, the camel consumed approximately 2.24 kg of protein from the Bermudagrass hay.

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To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. The kind of experiment would help you categorize some of the elements is:

C) All of the options are correct.

A) Observing the shininess of the elements can help categorize them based on their luster. Some elements, like metals, tend to be shiny, while non-metals may have a dull appearance. This can give clues about the type of element and its position in the periodic table.

B) Testing the ductility of the elements can provide information about their ability to be stretched or deformed without breaking. Metals, for example, are often ductile, while non-metals tend to be brittle. This characteristic can also help in categorizing elements within the periodic table.

D) Measuring the electrical conductivity of the elements can distinguish between metals, which typically conduct electricity well, and non-metals, which are usually poor conductors. This property is closely related to the arrangement of electrons in the atoms and can aid in placing elements in the appropriate regions of the periodic table.

Therefore, all of these experiments can be useful in categorizing elements and determining their placement in the periodic table.

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The complete question is:

To figure out where the fallen out boxes go to in the periodic table wall we need to perform a couple of experiments. What kind of experiment would help you categorize some of the elements?

A) Observe their shininess

B) Test their ductility

C) All of the options are correct

D) Measure their electrical conductivity

To determine if it was safe for Kacy to clean up the mess, we need to know the concentration of the hydrochloric acid solution and the stoichiometry of the reaction between hydrochloric acid and sodium bicarbonate.

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium bicarbonate (NaHCO3) is:

HCl + NaHCO3 -> NaCl + CO2 + H2O

From the balanced equation, we can see that one mole of HCl reacts with one mole of NaHCO3 to produce one mole of NaCl, one mole of CO2, and one mole of H2O.

Therefore, we need to know the concentration of the hydrochloric acid solution (in units of moles per liter) to determine the number of moles of HCl in the solution. We also need to know the amount of sodium bicarbonate in grams and convert it to moles to determine the limiting reagent in the reaction.

Once we have this information, we can calculate the amount of product (NaCl) formed and determine if it was safe for Kacy to clean up the mess based on any potential hazards posed by the reaction.

Answer:

specific colors of light pure neon produces glowing orange or red signs

Explanation:

Explanation:

You might wonder what neon signs like these have to do with fireworks. Neon lights produce their color by having gases in the tubes excited by electrical energy. Once the gas atoms or molecules are excited, they release that energy as very specific colors of light. Pure neon produces glowing orange or red signs.

I hope it's helpful!

Answer:

KOH+HBr=KBr+H2)

Explanation:

To obtain a bottle of air by rinsing out the first bottle, you should first fill the bottle with water and then pour out the water. This will remove any remaining gases or contaminants from the bottle.

Next, repeat step 1 with a glowing splint in the bottle of air. This will allow you to measure how long the splint burns in the bottle of air.

To time how long the splint burns, you can use a stopwatch or timer. Start the timer as soon as you place the glowing splint in the bottle of air, and stop the timer when the splint stops burning. The amount of time that the splint burns in the bottle of air is the time that you should record in the blank.

So, the answer to the question is:

Obtain a bottle of air by rinsing out the first bottle. Repeat step 1 with a glowing splint in the bottle of air. Time how long it burns using a stopwatch or timer. Record the time in the blank.

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The molarity of a solution that contains 265 moles of sucrose (C₁₂H₂₂0₁₂) in 82.0 L of solution is 3.23 M.

The number of moles of solute dissolved in one liter of solution is known as the molarity (M) of a solution.

To find the molarity of a solution, it is required to divide the number of moles of solute with the volume of the solution in liters. In this case, divide 265 moles of sucrose in 82.0 L of solution.

Molarity (M) = moles of solute ÷ volume of solution (in liters)

Molarity (M) = 265 moles ÷ 82.0 L

Molarity (M) = 3.23 M

Thus, the molarity of the solution is 3.23 M.

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Answer:

1s2  2s2  2p6  3s2  3p6  3d10 4s2  4p6  4d10

Explanation:

To write the configuration for the Silver and the Silver ion, first we need to write the electron configuration for just Silver (Ag).  We first need to find the number of electrons for the Ag atom (there are 47 electrons) using the Periodic Table.   When we write the configuration, we'll put all 47

Either way,  the Silver  electron configuration will be 1s2  2s2  2p6  3s2  3p6  3d10 4s2  4p6  4d10  5s1    

Note that when writing the electron configuration for an atom like Ag and Ag+, the 4d is usually written before the 5s.   Both of the configurations have the correct numbers of electrons in each orbital, it is just a matter of how the electronic configuration notation is written (see below for an explanation why).

For the Ag+, called the Silver ion,  we remove one electron from 5s2 leaving us with:

1s2  2s2  2p6  3s2  3p6  3d10 4s2  4p6  4d10

The general properties of matter result from its relationship with mass and space. ... Because it occupies space, all matter has volume and impenetrability, since two objects cannot occupy the same space simultaneously.

The heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol. To calculate the heat of reaction (ΔH) for the given reaction:

CCl₄(g) + H₂O(g) -> CHCl₃(g) + HCl(g)

You would need the standard enthalpies of formation for each compound involved in the reaction. The standard enthalpy of formation (ΔHf) is the enthalpy change when one mole of a compound is formed from its elements in their standard states.

Here are the standard enthalpies of formation for the compounds involved:

ΔHf[CCl₄(g)] = -135.5 kJ/mol

ΔHf[H₂O(g)] = -241.8 kJ/mol

ΔHf[CHCl₃(g)] = -104.7 kJ/mol

ΔHf[HCl(g)] = -92.3 kJ/mol

To calculate ΔH for the reaction, you need to sum up the enthalpies of formation of the products and subtract the sum of the enthalpies of formation of the reactants:

ΔH = ΣΔHf(products) - ΣΔHf(reactants)

ΔH = [ΔHf[CHCl₃(g)] + ΔHf[HCl(g)]] - [ΔHf[CCl₄(g)] + ΔHf[H₂O(g)]]

ΔH = [(-104.7 kJ/mol) + (-92.3 kJ/mol)] - [(-135.5 kJ/mol) + (-241.8 kJ/mol)]

ΔH = -196.9 kJ/mol - (-377.3 kJ/mol)

ΔH = 180.4 kJ/mol

Therefore, the heat of reaction (ΔH) for the given reaction is 180.4 kJ/mol.

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Answer:

47.9L of oxygen would be required

Explanation:

Assuming oxygen gas is at STP

Based on the reaction:

S₈ + 12 O₂ → 8SO₃

1 mole of S₈ (Molar mass: 256.52g/mol) reacts with 12 moles of oxygen.

To solve this question we must find the moles of S₈ added. With the reaction we can find the moles of O₂ and using PV = nRT we can find the volume of oxygen required:

Moles S₈:

45.7g * (1mol / 256.52g) = 0.178 moles S₈

Moles O₂:

0.178 moles S₈ * (12 moles O₂ / 1mol S₈) = 2.138 moles O₂

Volume O₂:

PV = nRT

V = nRT / P

Where V is volume

n are moles = 2.138 moles

R is gas constant 0.082atmL/molK

T is absolute temperature = 273.15K at sTP

P is pressure = 1 atm at STP

V = 2.138mol*0.082atmL/molK*273.15K / 1atm

V = 47.9L of oxygen would be required

Answer:

180.2 L

Explanation:

The pair of compounds that exhibit predominantly ionic bonding are NaF and MgO.

NaF is composed of a metal (Na) and a non-metal (F), and MgO is composed of a metal (Mg) and a non-metal (O). In both compounds, the metal atom loses electrons to form a cation, and the non-metal atom gains electrons to form an anion. The resulting ions attract each other electrostatically to form the ionic bond.

In the other pairs of compounds listed, the bonds are not purely ionic. SO2 and HCl have covalent bonds, RbF and NO2 have polar covalent bonds, KNO3 has both ionic and covalent bonds, and KCl and CO2 have polar covalent bonds.

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The ranking of bonds by increasing price volatility (duration) is as follows:

2) 4,2,1,3

This means that option 2 ranks the bonds in the correct order of increasing price volatility.

The duration of a bond measures its sensitivity to changes in interest rates. Generally, bonds with longer durations are more sensitive to interest rate changes and exhibit greater price volatility.

In the given ranking, the bond with the lowest price volatility (shortest duration) is bond 4, followed by bond 2, bond 1, and bond 3. This implies that bond 4 is the least affected by interest rate changes and has the lowest price volatility, while bond 3 is the most sensitive to interest rate changes and has the highest price volatility.

The ranking is based on the understanding that longer-term bonds tend to have higher durations and are more susceptible to price fluctuations due to changes in interest rates, while shorter-term bonds have lower durations and exhibit lower price volatility.

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The number of the molecules of the Cl2 are present in the 27.3 moles of Cl2 is 1.64 x 10²⁵ molecules.

The proportionality factor that connects the quantity of material in a sample with the number of component particles in that sample is called the Avogadro constant, often known as NA or L. It has a precise value of 6.022140761023 reciprocal moles and serves as a SI defining constant.

We calculate the number of molecules by using relation of Avogadro number as follows:

No. of molecules = 1 mole of substance = n (Avogadro number) = molecular weight

So, molecular weight = n

Value of n is 6.022 x 10²³

so, 27.3 g of water has 6.022 x 10²³ molecules

27.3 g  ≡  6.022 x 10²³

1 g ≡ 6.022 x 10²³/ 27.3

27.3 g ≡ (6.022 x 10²³/18) x 27.3

 = 1.64 x 10²⁵ molecules

27.3 moles of Cl2 is 1.64 x 10²⁵ molecules.

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There are 1.647 x 10^25 molecules of Cl2 present in 27.3 moles of Cl2.

To find the number of molecules of Cl2 present in 27.3 moles of Cl2, we need to use Avogadro's number. Avogadro's number tells us the number of particles (atoms or molecules) in one mole of a substance. It is approximately equal to 6.022 x 10^23 particles per mole.

First, we need to convert the moles of Cl2 to the number of particles of Cl2 using Avogadro's number:

27.3 moles Cl2 x (6.022 x 10^23 molecules/mole) = 1.647 x 10^25 molecules of Cl2


To determine the number of molecules in 27.3 moles of Cl₂, you can use Avogadro's number, which is approximately 6.022 x 10²³ molecules per mole.

Number of molecules = (moles of Cl₂) x (Avogadro's number)
Number of molecules = (27.3 moles) x (6.022 x 10²³ molecules/mole)

Number of molecules = 1.64 x 10²⁵ molecules of Cl₂

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Based on factors that affect the rates of chemical reactions, the trend expected in the table is that as the volume of sodium thiosulfate in water increases, 1) 5 mL 50 mL 0 mL 19 seconds

what is sodium thiosulfate ?

Sodium thiosulfate (Na2S2O3) is a salt composed of sodium, sulfur, and oxygen atoms. It is a colorless, crystalline solid that dissolves in water and has a variety of uses in different fields.

One of the most common uses of sodium thiosulfate is as a photographic fixer, where it is used to remove unexposed silver halide from photographic films and papers. It is also used as a neutralizing agent for chlorine and other oxidizing agents in water treatment, as a dechlorinating agent in the treatment of wastewater, and as a reagent in the laboratory for different chemical reactions.

Based on factors that affect the rates of chemical reactions, the trend expected in the table is that as the volume of sodium thiosulfate in water increases (

As the concentration of sodium thiosulfate increases, the frequency of effective collisions between the reactant molecules and the likelihood of successful collisions increases, resulting in a faster reaction rate. Therefore,

Flask 1 -- 1) 5 mL 50 mL 0 mL 19 seconds(with the highest concentration of sodium thiosulfate) should have the shortest time taken for the cross to become invisible, and

Flask 4 -- 4) 5 mL 20 mL 30 mL(with the lowest concentration of sodium thiosulfate) should have the longest time taken for the cross to become invisible.

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The statement is False.

Ethanol is one of many toxic substances found in tobacco smoke.

Ethanol is used in the manufacture of drugs, plastics, lacquers, polishes, plasticizers, and cosmetics. Ethanol is utilized in remedy as a topical antiinfective, and as an antidote for ethylene glycol or methanol overdose.

Ethanol is a natural chemical compound. it's far simple alcohol with the chemical formula C₂H₆O. Its system can be additionally written as CH ₃−CH ₂−OH or C ₂H ₅OH and is frequently abbreviated as EtOH. Ethanol is a risky, flammable, colorless liquid with a characteristic wine-like smell and pungent taste.

Within the worst instances, there can also be respiratory problems, low blood strain, incontinence coronary heart troubles, blood troubles, liver damage, and loss of life. Ethanol can also dry out and worsen the skin; there may be aches, redness, and swelling. Eye publicity to ethanol also can purpose tearing, burning, and stinging.

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Answer

c. Litmus Is red phenolphthalein is colorless

Explanation

A solution with a pH of 3 is acidic. The main use of litmus is to test whether a solution is acidic or basic, blue litmus turns red under acidic conditions, and red litmus turns blue under basic or alkaline conditions. Phenolphthalein is often used as an indicator in acid–base titrations. phenolphthalein, it turns colorless in acidic solutions and pink in basic solutions.

Therefore, the correct option for a solution with a pH of 3 is:

c. Litmus Is red phenolphthalein is colorless

Answer:

Its high

Explanation:

Becuase if u times it what do u get

The action modeled by the diagram is; flow of ions ( cations and anions ) in a cell/compound

The diagram is used to represent the flow of control ( flow of ions ) in a system, it is similar to a data flow diagram, because the start, direction and endpoint of an activity diagram is the similar to that of a data flow diagram. Activity diagrams are also used to generally describe the steps in a use case system as seen in the diagram attached in the question.

Hence the diagram ( activity ) represents the flow of ions in a compound

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Answer:

Chlorine (35.44 amu)

Explanation:

An unknown element is found to have three naturally occurring isotopes with atomic masses of 34.9689 (76.000%), 36.9659 (23.988%) and 35.9683 (0.012%).

We need to find the mass of the unknown element. When abundances is given, then atomic mass is given by :

\(M=34.9689 (76.000\%)+36.9659 (23.988\%) +35.9683(0.012\%)\\\\=34.9689 (\dfrac{76}{100})+36.9659 (\dfrac{23.988}{100}) +35.9683(\dfrac{0.012}{100})\\\\=35.44\ \text{amu}\)

So, the atomic mass of the unknown element is 35.44 amu and it is chlorine.