The products of the chlor-alkali process, Cl₂ and NaOH, are kept separated.(b) ClO⁻ or ClO₃⁻ may form by disproportionation of Cl₂ in basic solution. What determines which product forms?

The order of decreasing electronegativity is O > S > Ca > Rb > K. The correct option is A.

Electronegativity is a measure of an atom's ability to attract electrons towards itself in a covalent bond. Oxygen has the highest electronegativity value (3.44) on the Pauling scale, followed by sulfur (2.58), calcium (1.00), rubidium (0.82), and potassium (0.82).

Therefore, the order of decreasing electronegativity is O > S > Ca > Rb > K. This is because oxygen and sulfur are both nonmetals with high electronegativity values due to their small atomic size and strong nuclear charge. Calcium is a metal with a lower electronegativity value, followed by the alkali metals rubidium and potassium with even lower values.

It is important to note that electronegativity values are not always strictly decreasing down a group or across a period of the periodic table, but can have some irregularities due to variations in atomic size, nuclear charge, and electron shielding. Option A. is correct answer.

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Answer:

A substance may undergo phase change from a solid to a gas or from a gas to a solid if the temperature it is exposed to is changed very quickly. If the temperature around a solid is raised very quickly, it can sublimate, or phase change from a solid to a gas without existing as a liquid.

Explanation:

Answer:

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Explanation:

I'm good with history biology sum math so if you want to do what I asked and reposted I can give you the answers and I will show that they are correct I won't just guess like some people do just to get points cuz I don't care about points I just get on here to help people

Answer: The answer for the blanks is initial appearance and than final appearance.

Explanation:

The weak acids are HNO₂ and HF. Option D is correct.

HNO₂ (nitrous acid) and HF (hydrofluoric acid) are considered weak acids because they only partially dissociate in water, resulting in a relatively low concentration of H⁺ ions in solution. On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are strong acids, which fully dissociate in water, producing a high concentration of H⁺ ions.

On the other hand, HNO₃ (nitric acid) and H₂PO₄⁻ (dihydrogen phosphate) are both strong acids;

HNO₃ is a strong acid that fully dissociates in water, resulting in a high concentration of H⁺ ions.

H₂PO₄⁻ is a weak acid in its conjugate acid form (dihydrogen phosphate), but as H₂PO₄⁻, it acts as a weak base rather than a weak acid.

Hence, D. is the correct option.

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Answer:

answer is c

Explanation:

single replacement

Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove. Option D

The periodic table has to do with an arrangement of the elements in their order of reactivity. We know that the periodic table is arranged in groups and periods. The groups are the vertical portions while the periods are the horizontal portions.

Given that the reactivity would depend on the position of an element in the periodic table, we would look at where the elements that are to be considered are found in the periodic table.

We know that the elements that occur down the group for the metals are more reactive because they are more shielded thus they leave the attractive force of the nucleus much more easily.

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Missing parts;

Elements are organized on the periodic table based on their properties. Which statement correctly predicts and explains the chemical reactivity of two different metals? Barium (Ba) is less reactive than calcium (Ca) because the valence electrons in calcium atoms are farther from the nuclei and harder to remove. Strontium (Sr) is more reactive than magnesium (Mg) because the valence electrons in strontium atoms are farther from the nuclei and harder to remove. Rubidium (Rb) is more reactive than sodium (Na) because the valence electrons in sodium atoms are closer to the nuclei and easier to remove. Lithium (Li) is less reactive than potassium (K) because the valence electrons in lithium atoms are closer to the nuclei and harder to remove.

Being a weak acid (Ka = 5.6x104), the nitrous acid reacts with NaOH as follows: NaOH (l) + HNO2 = NaNO2 (aq) + H2O.

A 0.15 m naoh solution is used to titrate 100 ml of 0.15 m nitrous acid (HNO2). The pH of the initial solution is 2.04, 3.85 for the equivalence point, 8.06 for the point at which 80.0 ml of the base has been added, and 11.56 for the point at which 105 ml of the base have been added. There is initially simply a 0.12M HNO2 solution. Like Ka is: Ka is equal to [H+] [NO2]/[HNO2]. When the ions [H+] and [NO2] come from the same equilibrium, [H+] = [NO2] = x, 5.6x10⁻⁴ = X² / 0.15M. 8.4x10⁻⁵ = X². X = [H⁺] = 9.165x10⁻³M. Since pH = -log [H+], pH = 2.04.

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The standard molar entropy is a measure of the disorder or randomness of a substance at standard conditions. Generally, solids have lower entropy than liquids, and liquids have lower entropy than gases.Option e is correct.

NaCl(s) Na3PO4(aq) NaCl(aq)

a.NaCl(aq) > Na3PO4(aq) > NaCl(s)

b. NaCl(aq) > NaCl(s) > Na3PO4(aq)

c. Na3PO4(aq) > NaCl(aq) > NaCl(s)

d. NaCl(s) > NaCl(aq) > Na3PO4(aq)

e. NaCl(s) > Na3PO4(aq) > NaCl(aq)

Based on the principles mentioned above, option e is correct. NaCl(s) has the lowest entropy because it is a solid, while Na3PO4(aq) has a higher entropy because it is in aqueous solution, and NaCl(aq) has the highest entropy since it is a more disordered state than both solid NaCl and Na3PO4(aq).

So, the correct order is NaCl(s) > Na3PO4(aq) > NaCl(aq).

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Answer:

b) the metals strips

Explanation:

In an experimental design, an independent variable is a variable that is changed or manipulated in a series of experiments. An independent variable is not dependent on any other variable in the experiment. The hypothesis for this experiment is stated to be: "If the chemical activity of the metallic wrapper is increased, then less rusting of iron will occur. The independent variable relates to the type of metal wrapping strip, and the dependent variables are the amount of rusting and color of the water.

Answer:

volume

Explanation:

the mass is the same on earth as it is on the surface of the moon. The weight is determined by the force of gravity. The density is the thickness. But the volume is not a factor.

Answer:

1)  A compound is the chemical combination of two or more elements into a single substance.

An atom is the smallest particle of an element.

2) Elements have only one kind of atom.

Compound always have more than one kind of atom.

Answer:

1) An atom is the smallest possible piece of a chemical element, and a compound can be composed of two or more separate elements

2) An element is made up of only one kind of atom and a compound is made up of two or more kind of atoms

Explanation:

Answer:

You will need a Kukushili pressure cooker for this experiment. This pressure cooker will allow you to compress the gases and observe its volume.

Answer: 1.45M

Explanation:

The definition of molarity is moles/liter.  The neutralization of NaOH with HI is:

HI + NaOH = NaI  + H2O

One mole of HI reacts with 1 mole of NaOH.  We'll assume this is a titration reaction and that the 10.00ml sample of NaOH contains the same number of moles as the 56.75ml of 0.256M HI.

Moles HI:  (0.256 moles/liter)*(0.05675 L) = 0.01453 moles HI

That means we muct have 0.01453 moles NaOH in 10.0ml of NaOH solution.

(0.01453 moles NaOH)/(0.010L) = 1.45 M

==

Another approach is to use the relationship M1V1 = M2V2, which is useful for titrations (M is concentration and V is volume):

We want M2, so rearrange:  M2 = M1V1/V2

M2 = (0.256M)*(56.75ml)/(10.0ml)

M2 = 1.45M

Answer:

Basically it would be  8.5g. Not total sure.

Explanation:

If its right plz give brainlest.

Answer:

A. 8.5g

Explanation:

Have a great day!

The two elements that would have a very different melting point than titanium (Ti) are Sulfur (S) and Selenium (Se)

From the question, we are to determine the elements that would have different melting point than titanium.

Titanium (Ti) is a transition metal which belongs to 3d- block on the periodic table.

Iron (Fe) and Chromium are also transition metals; and they belong to the 3d- block on the periodic table. Transition metals have high melting points.

Sulfur (S) and Selenium (Se) are Group 16 elements, which will have lower melting points compared to the transition elements.

Hence, the two elements that would have a very different melting point than titanium (Ti) are Sulfur (S) and Selenium (Se)

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Answer:

Complex permanent tissue is defined as a collection of structurally dissimilar cells performing a common function or set of functions.

its functions are:

1.help in the transportation of organic material, water, and minerals up and down the plants.

2.it helps in transportation of food from leaves to other parts of plants.

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In order to accurately determine the amount of vitamin C present in a sample, it is necessary to titrate blank samples.

This is because the presence of other substances in the sample can interfere with the accuracy of the results. By titrating blank samples, which are essentially samples without vitamin C, we can determine the amount of interference present in the sample.

This interference can then be subtracted from the total amount of titrant used in the sample to obtain the accurate amount of vitamin C present.

Additionally, blank samples are used to ensure that the titrant and other equipment being used are working properly and are not contaminated. Overall, titrating blank samples is a crucial step in obtaining accurate results in the analysis of vitamin C.

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Answer: During succession, new species move into an area and colonize it.

Explanation: Ecological succession refers to the process of change in the composition and structure of an ecosystem over time. It occurs due to the interactions between the biotic (living) and abiotic (non-living) components of an environment. As succession progresses, new species gradually establish and thrive in the area, leading to a change in the species composition. This process can occur over a long period of time, ranging from decades to centuries, depending on various factors such as environmental conditions and the specific type of succession.

Answer:

A

Explanation:

Lighting a fireworks the potential energy is converted to all forms of energy like light, heat and sound energy

Answer:

Products would be on the right. Reactants would be on the left

Explanation:

b.temperature

in a calorimetric determination, either 1. an exothermic process occurs and heat, q, is negative, indicating that thermal energy is transferred from the system to its surroundings, or 2. an endothermic process occurs and heat, q, is positive, indicating that thermal energy is transferred from the surroundings to the system.

Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

Answer:

A. 7

(assuming the water is neutral)

To calculate the ratio of uranium-235 to lead-207 atoms in the mineral sample, we can use the atomic masses and the concept of radioactive decay.

The ratio of uranium-235 to lead-207 atoms in the mineral sample is 1:3.The atomic mass of uranium-235 (U-235) is approximately 235 atomic mass units (amu), while the atomic mass of lead-207 (Pb-207) is approximately 207 amu.

Given:

Number of uranium-235 atoms = 50,000

Number of lead-207 atoms = 150,000

To find the ratio, we divide the number of uranium-235 atoms by the number of lead-207 atoms:

Ratio = Number of uranium-235 atoms / Number of lead-207 atoms

Ratio = 50,000 / 150,000

Simplifying the ratio:

Ratio = 1/3

Therefore, the ratio of uranium-235 to lead-207 atoms in the mineral sample is 1:3.

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The substances that have Delta Hf = 0 kJ/mol are O2(g), Br2(l), He(g), Fe(s).

Delta Hf = 0 is the standard enthalpy of any element in its most stable form is equal to zero.

When enthalpy is negative, the delta Hf is minus zero, which means the system releases heat.

When the system gains heat, the delta Hf is positive.

Thus, the substances are O2(g),  Br2(l), He(g), Fe(s).

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Answer:

1,4,5,6

Explanation:

Answer:

only 2.5% is fresh water on earth

Answer:

The answer is 3%

Explanation:

Answer:

The plateaus or horizontal lines on the graph represent the transition between states of the sample. The first plateau represents the melting (or transition from solid to liquid) and the second plateau represents boiling (or transition from liquid to gas).

Explanation:

All of the properties such as ice floating on water, while most solids would sink when placed in its liquid are all due to the structure of the compounds.

The structure of the compounds includes the bonding angle, the type of bonds, the size of the molecule,  the interactions between the molecules etc.  Slight changes in the chemical structure and affect the properties if the compound.

Isomeric compounds with the same  chemical formula but different structures can have different melting and boiling point and differ in reactivity and flammability.

Another common change in isomers are with the double bonds.  A double bond can be in the cis formation or in the trans formation, and this will affect its properties as trans isomers will be having high melting point than the cis isomer.

Thus, structure of compounds  do determine the properties of the compounds.

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