13. Classify each element as a representative element, transition metal, or noble
gas
a. 1s 2s 2p 3s² 3p 3d¹0 4s² 4pº
b. 1s² 25² 2p
3s² 3p 3d 4s²
c. 1s 2s 2p 3s² 3p²

Answer:

All are correct

Explanation:

This might be a little deceptive.  The question shows H, O and N which would designate ELEMENTS.

However, all of these can also be considered compounds and molecules as well.  BUT, they are H₂, O₂ and N₂ when they are molecules and compounds.

So it depends on the whether the question is being literal or not.

Answer:

[(x-37.5)/x]*100%

62.5%  (assuming the original sample weighs 100.0g)

Explanation:

Let's say that the original sample is x

Mass of I-125 which has decayed: x-37.5

Percentage of decayed mass: [(x-37.5)/x]*100%

Please recheck, for this may not be the correct answer

Beans are processed through 'nibbing'. During the nibbing process, the roasted cocoa beans are crushed and ground into a paste called cocoa mass or cocoa liquor.

This cocoa mass can then be further processed to separate the cocoa solids from the cocoa butter, which is the fat component of the cocoa bean. The separated cocoa solids and cocoa butter are used in the production of chocolate. Pure cocoa mass (cocoa paste) in solid or semi-solid form is known as chocolate liquor. It includes about equal amounts of cocoa butter and solid cocoa, much like the cocoa beans (nibs) from which it is made. It is made from fermented, dried, roasted, and separated from their skins cocoa beans. To make cocoa mass (cocoa paste), the beans are pulverised.

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Answer:

Entropy,mass and volume.... I think

Mass is the extensive property of a sample of aluminum. Therefore, option (A) is correct.

The extensive property can be described as a physical property of matter that changes with a change in the size and shape of the matter. Therefore, the extensive property of any substance varies directly with the mass.

Extensive properties are the value of the property of the system that must be equal to the sum of the values of different parts of the system. These properties depend on the amount of matter contained in the system.

Examples of Extensive properties are temperature, pressure, density, boiling point, etc. The ratio of the two extensive properties is an intensive property such as density.

The mass of a sample of aluminum is an example of extensive property as it depends on the amount of aluminum in the given sample. This property of the sample is proportional to the size of the system.

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Your question is incomplete, most probably the complete question was,

Which of the following is an extensive property of a sample of aluminum?

A) Mass

B) Temperature

C) Pressure

D) Density

Answer: B. it will scatter a beam of light

Explanation: hope it is helpful........

Answer:

it should be +0.46 :)

Explanation:

I just took the test and got it right.

Answer:

I think it's +1.14 V, but don't take my word for it..

Answer:

With the policies of containment, the United States hoped to effectively stop the spread of communism and their newest threat. After the war, the United States and the Soviet Union had very different ideas on how to rebuild.

When 269 ml of the a 0.840 m solution of sodium chloride is combined to 617 ml of the a 0.370 m nacl aqueous solution, the result is 0.512 M of nacl concentration.

As an electrolyte replenisher, sodium chloride is used to assist reduce heat cramps brought on by excessive perspiration. The medication is also used to make a normal isotonic sodium chloride solution.

A little quantity of sodium is needed by the human body to convey nerve signals, contract and relax the muscles, and keep the right ratio of water and ions. These vital processes are predicted to need 500 mg pf salt each day from us.

Strength = (V1S1 + V2S2)/(V1+V2)

\(=\frac{(269*0.840)+(617*0.370)}{(269+617)}\)

\(=0.513M\)

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The redox reaction which would most likely occur if silver and zinc metal were added to a solution that contained silver and zinc is Zn + Ag\(^+\) \(\rightarrow\)Zn\(^2+\) + 2 Ag .

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.

The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.

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Answer:

The correct answer is C 112

Explanation:

I just took the test good luck :)

Answer:

I think it is 112

Oxidative rancidity results from the exposure of fat to oxygen.

The type of rancidity that results from the exposure of fat to oxygen is called oxidative rancidity. This occurs when the unsaturated fatty acids in the fat are exposed to oxygen, causing them to break down and produce free radicals. These free radicals can then react with other compounds in the fat, leading to the development of off-flavors and odors.

Oxidative rancidity occurs when unsaturated fats or oils react with oxygen in the presence of heat, light, or catalysts, such as metals. The oxygen molecules react with the double bonds present in the unsaturated fatty acids, causing the formation of free radicals. These free radicals initiate a chain reaction known as oxidation, leading to the degradation of the fat molecules.

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The number of mole of the dry gas at the same temperature is 0.021 mole

First, we shall list out the given parameters from the question. This is given below:

The number of mole of the dry gas collected can be obtained as follow:

PV = nRT

695 × 0.596 = n × 62.36 × 316

414.22 = n × 19705.76

Divide both sides by 19705.76

n = 414.22 / 19705.76

n = 0.021 mole

Thus, we can conclude that the number of mole of the dry gas is 0.021 mole

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The correct increasing order of solubility for the given gases is: NH₃ < N₂ < CO₂

A chemical's solubility is the maximum amount of that substance that will dissolve in a specific amount of solvent at a specific temperature. Solubility has several practical applications, including water filtering, beverage manufacturing, and vitamin storage.

The ability of a medicine to dissolve is essential to its effectiveness. A drug substance could be absorbed without it, which results in limited bioavailability. Drugs with poor solubility can potentially cause problems with metabolism or permeability, interaction with other medications, or the requirement for prolonged drug release.

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Answer:

66m

Explanation:

To get the area of something you multiple the length (5.5) by the width (12) together. So the problem would look like 5.5×12 and if you multipe that you get 66

Answer:

Any of the noble gasses, eg xenon.

Explanation:

All noble gasses have full outer shells of electrons which means they are very unreactive.

Answer:

0.3M

Explanation:

Find the amount concentration of the anion in a 0.100 mol/L solution of Al(CIO3)3.

FOR EVERY MOLE OF Al(CIO3)3., THERE ARE 3 MOLES OF CIO3.

SO IN A 0.00m SOLUTION, THE CONCENTRATION OF THE ANION

ClO3 IS 3X0.1M = 0.3M

.

The statement "Cis refers to Z configuration" is True.

In chemistry, the letter "Z" is frequently used as a image to represent the atomic wide variety. The atomic number of an detail shows the range of protons located within the nucleus of an atom. Each element has a completely unique atomic wide variety, which determines its function at the periodic table and distinguishes it from other elements. For instance, hydrogen has an atomic number of one, indicating it has one proton, while oxygen has an atomic quantity of 8, representing eight protons in its nucleus. The atomic quantity plays a essential function in figuring out the chemical properties and conduct of factors. It affects the element's electron configuration, bonding capabilities, and universal reactivity. By know-how the atomic quantity, scientists can are expecting how factors will have interaction with different materials and the way they will form compounds. Therefore, the letter "Z" is generally used as a shorthand notation to symbolize the atomic quantity in chemical equations, formulation, and discussions in the field of chemistry..

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Cis refers to the "Z" configuration. Thus, the statement is true.

In organic chemistry, the term "cis" is used to describe the "Z" configuration. In the context of a double bond, "cis" signifies that the substituent groups are positioned on the same side of the double bond, while "trans" indicates that they are on opposite sides.

Similarly, in a cyclic structure, "cis" denotes that the substituent groups are located on the same face of the ring, whereas "trans" signifies that they are on opposite faces.

The "Z" configuration specifically represents the cis configuration, and it is a notation employed to indicate this arrangement in organic chemistry. On the other hand, the "E" configuration is used to represent the trans configuration.

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The correct question is:-

State whether the statement "cis refers to 'Z' configuration" is true or false.

Answer:

The molecules in a solid are close together and they vibrate in place. The molecules in a liquid move quickly and farther apart from eachother. The particles in a gas move freely at high speeds and slide past eachother.

Answer:

0.05 mol

Explanation:

Moles = Mass / Mr (Relative formula mass)

Ar of aluminium = 27

Ar of sulphur = 32

Ar of oxygen = 16

Mr of Al2(S2O3)2 = (27×2)+((32×2)×3)+((16×3)×3)= 390

Moles = 18.5g / 390

Moles = 0.05 mol

Answer:

\(pH=14.2\)

Explanation:

Hello there!

In this case, according to the information in this problem, and considering these two bases are strong, it is necessary for us to calculate the total moles of OH ions as shown below:

\(n_{OH^-}^{from\ NaOH}=0.050L*1.0mol/L=0.050mol\\\\n_{OH^-}^{from\ Ba(OH)_2}=0.050L*1.0mol/L*2=0.10mol\\\\n_{OH^-}^{tot}=0.15mol\)

Now, the as the solutions are additive, the total volume is then 0.100 L and the concentration:

\([OH^-]=\frac{0.15mol}{0.100L}=1.5\)

And therefore, the pH is:

\(pH=14+log(1.5)\\\\pH=14.2\)

Regards!

Answer: Not possible

Explanation:

It's not possible to determine how many moles of H2O2 you would end up with based on the information given.

The reason for this is that we don't know what is happening to the N2OOH in this scenario. Depending on the conditions and reaction occurring, the N2OOH could potentially break down into one or more different compounds, or it could react with another substance to form a new compound. Without this information, we cannot determine the amount of H2O2 that would result.

Explanation:

The chemical equation for the decomposition of N2OOH (dinitrogen trioxide) is:

N2OOH → 2 H2O2

This equation shows that one mole of N2OOH decomposes to produce two moles of H2O2.

If you start with 50 moles of N2OOH, you can calculate the number of moles of H2O2 produced by multiplying the number of moles of N2OOH by the stoichiometric coefficient of H2O2 in the balanced equation.

So,

Number of moles of H2O2 = 2 x 50 moles of N2OOH

= 100 moles of H2O2

Therefore, starting with 50 moles of N2OOH will produce 100 moles of H2O2 after complete decomposition

Answer:

the phenotype of the offspring will be pink

the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.

Given data:

Atomic mass of Li-7, A = 7.016003

The atomic mass of Li-7 is the sum of the number of protons and neutrons in it. Therefore, the number of neutrons in Li-7 is:

Neutrons = Atomic mass - Protons= 7.016003 - 3= 4.016003The mass of 3 protons and 4.016003 neutrons in Li-7 is: Mass of protons + Mass of neutrons = (3 x 1.007276) + (4.016003 x 1.008665) = 3.021828 + 4.029454 = 7.051282 u

Therefore, the mass defect in Li-7 is:

Mass defect = Actual mass - Calculated mass

= Atomic mass - Mass of protons and neutrons

= 7.016003 - 7.051282

= -0.035279 u

Nuclear Binding Energy per nucleon (BE/A) can be calculated using the formula:

BE/A = [Δm.c² / A]

where Δm is the mass defect and c is the speed of light which is 2.998 × 10⁸ m/s.

Substituting the values in the above formula:

BE/A = [(-0.035279) × (2.998 × 10⁸)² / 7]= 5.60553 × 10⁻¹² J/nuclide

Therefore, the mass defect of Li-7 is -0.035279 u and the nuclear binding energy per nucleon is 5.60553 × 10⁻¹² J/nuclide.

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Answer:

Explanation:

The pH of a solution can be found by using the formula

\(pH = - log [ {H}^{+} ]\)

From the question we have

\(ph = - log(9.34 \times {10}^{ - 6} ) \\ = 5.0296...\)

We have the final answer as

Hope this helps you

Answer:

I just did it home slice the first one's Ag+ and Zn2+ and the second one is A

Explanation:

I just did the assignment

Answer:

ag+ and zn2+

Explanation:

second question is A

The value of n in the hydrate formula would be 5.

The formula for the hydrated salt can be determined using the empirical formula approach. First, the mass of the anhydrous salt and the mass of the water of hydration needs to be determined.

Mass of hydrate salt = 14.00 g

Mass of released water = 5.051 g

Mass of anhydrous salt = 14.00 - 5.051

                                       = 8.949 g

Now let's find the mole of each:

Mole of anhydrous salt = 8.949/159.609 = 0.056 mol

Mole of water = 5.051/18.015 = 0.280 mol

Divide through by the smallest mole:

Anhydrous salt = 0.056/0.056 = 1

Water = 0.280/0.056 = 5

The formula of the hydrates is \(CuSO_4.5H_2O\).

Thus, the value of n in the hydrate formula is 5.

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Answer:

Los hongos, a diferencia de las plantas que utilizan la fotosíntesis para producir su alimento, absorben los nutrientes de materia orgánica que descomponen.

Explanation:

folic Acid

Folic acid, often known as folate, is a water-soluble B vitamin that is necessary for the generation of healthy red blood cells and the regular functioning of the brain system. Folate is present in numerous foods, including leafy green vegetables, legumes, nuts, and grains. Numerous processed goods, including breakfast cereals, breads, and rice, contain it as well. Folic acid is essential for pregnant women because it prevents birth abnormalities. It is also crucial for people of all ages since it helps maintain the health and normal operation of the body's cells. Folic acid is also essential for the production and repair of DNA, as well as the breakdown of specific proteins. Without appropriate folic acid, the body cannot produce red blood cells effectively, which can result in anemia. It is essential to consume adequate amounts of folic acid through diet or supplementation.

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Answer: B: NaOH

Explanation:

Molten cryolite is the substance which serves as an electrolyte in the diagram.

This is defined as a substance that conducts electricity when dissolved in water.

Molten cryolite serves as the electrolyte as it helps dissolve molten aluminium oxide and increases the conductivity of the solution which was why it was chosen as the most appropriate choice.

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Answer: Molten cryolite

Explanation: Molten cryolite serves as the electrolyte as it helps dissolve molten aluminium oxide and increases the conductivity of the solution which was why it was chosen as the most appropriate choice.