which statement is correct about an electrochemical cell? cathode dissolved, electrons flow from cathode to anode

The reaction of a haloalkane (X) with sodium metal in the presence of dry ether that produces 2,3-dimethylbutane as the major product suggests that (X) is 2-bromopropane.

The reaction can be represented as follows:

2-bromopropane + 2Na → 2,3-dimethylbutane + 2NaBr

In this reaction, the sodium metal (Na) acts as a strong reducing agent and undergoes a single-electron transfer with the bromine atom in 2-bromopropane (X), resulting in the formation of 2,3-dimethylbutane and sodium bromide (NaBr) as the byproduct.

Hence, the reaction of a haloalkane (X) with sodium metal in the presence of dry ether that produces 2,3-dimethylbutane as the major product suggests that (X) is 2-bromopropane.

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IUPAC names:

SF6: Sulfur hexafluoride

Hg2Cl2: Mercurous chloride

KHCO3:potassium hydrogen carbonate

HCl(g): Hydrogen chloride

C2O3: Oxalic anhydride

Cu(NO3)2: Copper(II) nitrate

Anhydrides are compounds consisting of a non-metallic element plus oxygen. The formula for anhydrides is of the type X2On (where X is a non-metallic element and O is oxygen). In these compounds, the oxygen also has an oxidation state of -2.

Oxalic anhydride or ethanedioic anhydride, also called oxiranedione, is a hypothetical organic compound

Answer:

They mask the recessive alleles

1.95 milliliters are used to prepare the idodine-131 solution.

an activity of iodine-131 = 2.0 mCi/ml

If the solution has an activity of 2.0 mCi/mL, one milliliter has the radioactivity of 2.0 mCi.

V = 3.9 mCi / (2.0 mCi/ml)

V = 1.95 ml; volume used to prepare the iodine-131 solution

The radioactivity (the unit curie (Ci)) is the number of radioactive decays per second.

In this example, the unit for the radioactivity is millicurie (mCi).

The curie (Ci) is named after scientist Marie Curie.

Iodine-131 is a radioactive isotope treat the thyroid gland. Radioactive iodine emits gamma waves and beta particles.

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Answer:The two types of chemical bonds that atoms can form to achieve stability are called ionic bonds and covalent bonds. Does this help

Explanation:

In de Morceau's nomenclature scheme, the smaller atom appears first.

Nomenclature is an organism name system used in biological classification. Genus and species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species to which the creature belongs.

On August 26, 1743, Antoine-Laurent Lavoisier was born in Paris, France. He was a well-known French chemist and a key player in the 18th century chemical revolution. In addition to co-creating the current system for identifying chemical compounds, he established an experiment-based explanation of the chemical reactivity of oxygen.

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Answer:(part a) Lithium and Chlorine, (part c) Potassium and Oxygen are likely to form an ionic compound.

Explanation:

brainliest please

260grams

The formula for calculating the moles of NaOH is expressed as

Determine the required mass of NaOH

Hence the grams of sodium hydroxide (NaOH) you need to make 6.5 L of 1.0M solution is 260grams

Answer:

+2

Explanation:

Oxidation number of an element, also called its oxidation state, is the number of electrons its atoms lost or gain in the process of forming a chemical compound.

To determine the oxidation state of an element or compound;

- The sum of all the oxidation numbers in a neutral compound must equal zero (0).

In the compound: Fe2(CO3)2

This compound is a neutral one, hence, its oxidation state is equal to zero (0).

It contains a polyatomic ion (carbonate ion) i.e. CO3 2-, whose net charge is -2.

Hence, to find the oxidation number of Iron (Fe), which is represented by X, in the compound, we say;

X(2) + -2(2) = 0

2X + -4 = 0

2X - 4 = 0

2X = 4

X = +2

Therefore, the oxidation number of Fe in Fe2(CO3)2 is (+2)

The compound Fe2(CO3)2 is called Iron (II) carbonate

Oxidation number of Fe in \(\rm Fe_2(CO_3)_2\) is 2. An atom's oxidation number is a positive or negative number.

A notion used in chemistry to characterise the relative electron distribution and the level of oxidation or reduction of atoms in a compound or ion is known as the "oxidation number," sometimes known as the "oxidation state." Based on the presumption that electrons in chemical bonds are entirely transmitted to the more electronegative atom, it is a method of bookkeeping that assigns a notional charge to each individual atom in a molecule or ion.

The -4 stands for the overall charge that the carbonate ions provided, and the x is the Fe's oxidation number.

2x + (-4) = 0

2x - 4 = 0

2x = 4

x = 4/2

x = 2

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The root-mean-square speed of the neon gas can be calculated using the root-mean-square speed of the argon gas and their respective atomic masses.

The root-mean-square speed of the neon gas is approximately 1,716 m/s.

The root-mean-square speed of a gas is given by the equation:

v = √(3RT/M)

Where v is the root-mean-square speed, R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas.

Given that the root-mean-square speed of the argon gas is 1,210 m/s, and the molar mass of argon is 39.95 g/mol, we can calculate the root-mean-square speed of neon.

First, we calculate the ratio of the root-mean-square speeds:

(v_neon / v_argon) = √(M_argon / M_neon)

Squaring both sides of the equation and rearranging, we get:

(v_neon^2 / v_argon^2) = M_argon / M_neon

Substituting the known values, we have:

(v_neon^2 / 1210^2) = 39.95 / 20.18

Rearranging and solving for v_neon, we find:

v_neon^2 ≈ 1210^2 * (20.18 / 39.95)

Taking the square root, we get:

v_neon ≈ 1716 m/s

Therefore, the root-mean-square speed of the neon gas is approximately 1,716 m/s.

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Answer:

color, shape, texture, odor, sound, malleability, ductility, volume, mass, density, boiling point, melting point, viscosity, hardness, conductility.

Explanation:

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The physical properties of a material depend on its colour, shape, texture, odour, sound, malleability, ductility, volume, mass, density, boiling point, melting point, viscosity, hardness, and conductivity.

A physical property is any property that can be measured without changing the matter.

The physical properties of a substance depend on its colour, shape, texture, odour, sound, malleability, ductility, volume, mass, density, boiling point, melting point, viscosity, hardness, and conductivity.

Malleability is the property of metals in which metals are to be beaten into sheets. Ductility is the property of metals in which metals are to be drawn into wires.

The delocalized electrons enable the metal atoms to overlap each other when stress is applied and can be converted to sheets or wires.

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Answer:

When electrons are removed from an object, it becomes positively charged

An electrical charge is created when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged.

Answer:

B (dipole-dipole interaction)

The next questions answer is A (hydrogen bonding)

Explanation:

For edge:)

A mixture of hydrogen sulfide (H₂S) and hydrogen chloride (HCl) is dipole dipole interaction. Therefore, option A is correct.

The term dipole dipole interaction is defined as when the partial charges produced within one molecule are attracted to an opposite partial charge in a nearby molecule.

Polar molecules are in line therefore that the positive end of one molecule interacts with the negative end of another molecule.

In hydrogen sulphide and hydrogen chloride dipole dipole attraction present, because one end have positive charge and another end have negative charge.

Because of the force of attraction between oppositely charged particles, there is a dipole-dipole force of attraction between HCl and H₂S molecules.

Thus, option A is correct.

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Your question is incomplete, most probably your question was

A mixture of hydrogen sulfide (H2S) and hydrogen chloride (HCl):

A. dipole dipole interaction

B. dipole induced interaction

C. induced induced interaction

1.24×10−2 mole is the number of moles of electrons passed in an electrolytic cell when a current of 25 amps is applied for 6.0 hours.

What is electron?

Electrons belong to the first generation of the leptonic  family of particles and are generally considered elementary particles because they have no known composition or substructure.

Therefore, 1.24×10−2 mole is the number of moles of electrons passed in an electrolytic cell when a current of 25 amps is applied for 6.0 hours. Electrons belong to the first generation of the leptonic  family of particles and are generally considered elementary particles because they have no known composition or substructure.

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If in the solution, half of the added solute fails to dissolve. The solution started out supersaturated. The correct option is b.

Supersaturation is the condition where the solutes exceed the amount that can be dissolved in a solution.

Supersaturation occurs when the solute no longer mix in the solution.

Thus, the correct option is b. The solution started out supersaturated.

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Answer: C

Explanation: because mass number = proton + neutron number and atomic number = proton number

so 16-8=8

Answer:

C. 8

Explanation:

number of neutrons = mass number - atomic number

16-8

8

Answer:

p-e-n

1- Na=11-11-12

2-Cl=17-17-29

3-Mg=12-12-12

4-O=8-8-8

Explanation:

chlorine is Cl

The PEN value for sodium, chlorine, magnesium, and oxygen is (11,11,12),(17,17,18),(12,12,12), (8,8,8) respectively

The atomic number(Z) is equal to the number of protons to equal to number of electrons.

The number of neutrons is equal to atomic mass minus the atomic number

n=A-Z

For Na, Z=11, p=e=11

The number of neutrons is 23-11=12

For Cl, Z=17, e=17

The number of neutrons is A-Z=35-17=18

For magnesium, Z=12, A=24

The number of neutrons is 24-12=12

For O, Z=8, p=e=8

The number of neutrons is 16-8=8

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Plants' adaptation in the desert that protects their water and food storage is they have sharp pri ck les or needles.

Thus, the correct answer is C.

Deserts аre аrid lаnds thаt stаy pаrched for long stretches of time. Without аdаptаtions, plаnts would wither аnd die. Temperаtures rise аnd fаll to extremes, аnd some regions receive аs little аs 10 inches of аnnuаl rаinfаll. Desert plаnts include cаcti, yuccаs, аgаves, shrubs, grаsses аnd аnnuаl forbs (non-grаss plаnts thаt live for only а seаson).

For example, cаcti hаve leаves thаt hаve evolved into spines, which help minimize wаter loss by evаporаtion аnd screen the plаnt from the sun. It аlso helps protect them from predаtors.

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Answer: c. they have sharp pri ck les or needles

Explanation: i took the test in got a 100%  

What is the DNA strand? You have not named it.

Conducting a comparative investigation is always less expensive than an investigation in which data is obtained from the Internet.

Information theory and efforts to construct and connect computer networks that were the result of American research and development and international collaboration, particularly with scholars in the United Kingdom and France, are at the root of the history of the Internet.

In the late 1950s, The Internet field of computer science was just beginning to take time-sharing among computer users into account. Later, Internet explored if this could be done across wide area networks. Independently, Donald Davies developed packet switching at the National Physical Laboratory (NPL) in 1965 and proposed a national commercial data network in the UK. Paul Baran proposed a dispersed network based on data in message blocks in the early 1960s.

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Answer:

2

Explanation:

The coefficient for O is 2 and this is an example of a combustion reaction. With the help of the coefficient 2 infront of oxygen, this equation now demonstrates law of conservation of mass.

The coefficient for O₂ that demonstrates the law of conservation of mass is

2.

The law of conservation of mass states that mass can neither be created

nor destroyed but can be transformed from one form to another.

The mass of the reactant and the mass of the product should be equal.

Therefore, let's balance the equation

CH4 (g) + 0₂(g) → CO₂(g) + 2H₂O(g)

For the equation to be balanced the masses of each molecules on both

sides will be the same .

Therefore,

CH4 (g) + 20₂(g) → CO₂(g) + 2H₂O(g)

The coefficient of 2 for O₂ will balance the masses of oxygen on both

sides of the chemical equation.

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Answer:

Between the two compounds, hexane and potassium sulphate, hexane is the more flammable compound.

Explanation:

Among hexane and potassium sulfate, hexane is more flammable.

Flammability may be defined as a type of physical property of an element or compound which determines the ability to support combustion. Due to this, it is also known as Combustibility.

This property defines the capability of any chemical element in order to ignite and continue it a very long time after coming or exposing it to direct contact with a flame or any source of ignition.

The characteristic of flammability relies on the volatility of the compound. This means that the higher the volatility of the compound greater or high the flammability.

So, when we compare hexane or potassium sulfate on the basis of volatility, hexane is more volatile and thus possesses high flammability.

Therefore, among hexane and potassium sulfate, hexane is more flammable.

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Answer:

true

Explanation:

The dissociation of strontium sulfate (SrSO₄) in water can be represented by the following equation: SrSO₄ (s) ⇌ Sr²⁺ (aq) + SO₄²⁻ (aq)

In this equation, the solid strontium sulfate (SrSO₄) dissociates into its respective ions: the strontium cation (Sr²⁺) and the sulfate anion (SO₄²⁻). When the compound is placed in water, it dissociates into its ions, which are now in the aqueous phase, represented by the (aq) notation. The double arrow (⇌) indicates that the dissociation is a reversible process, meaning that the ions can recombine to form the original compound.

The extent of dissociation depends on the solubility of strontium sulfate in water, which is relatively low. This means that only a small amount of SrSO₄ will dissolve in water, while the majority of it remains undissolved as a solid. The solubility product constant (Ksp) can be used to quantify the solubility of sparingly soluble salts like SrSO₄. It is defined as the product of the equilibrium concentrations of the constituent ions raised to the power of their stoichiometric coefficients. For SrSO₄, the Ksp expression can be written as:

Ksp = [Sr²⁺] [SO₄²⁻]

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my texts aren't going thro. we can talk in snap chat which is a social site.

Answer:

NaCl (common salt) is solid in state and solid ions or compounds don't conduct electricity. It needs to be either melted, molten or dissolved in a solution (i.e. water) first.

Explanation:

The molarity of KMnO4 in the given solution is approximately 0.00126 M. Molarity is a measure of the concentration of a solute in a solution. It represents the number of moles of the solute present per liter of the solution.

To determine the molarity of KMnO4 in the given solution, we need to first calculate the number of moles of KMnO4 using its mass and molar mass, and then divide it by the volume of the solution.

The molar mass of KMnO4 can be calculated as follows:

(1 × atomic mass of potassium) + (1 × atomic mass of manganese) + (4 × atomic mass of oxygen)

= (1 × 39.10 g/mol) + (1 × 54.94 g/mol) + (4 × 16.00 g/mol)

= 39.10 g/mol + 54.94 g/mol + 64.00 g/mol

= 158.04 g/mol

Now, let's calculate the number of moles of KMnO4:

Number of moles = Mass / Molar mass

Number of moles = 0.0897 g / 158.04 g/mol

Number of moles ≈ 0.000567 mol

Next, we need to calculate the molarity using the number of moles and the volume of the solution:

Molarity (M) = Number of moles / Volume (in liters)

Molarity = 0.000567 mol / 0.450 L

Molarity ≈ 0.00126 M

In this case, the molarity tells us the concentration of KMnO4 in moles per liter.

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