Draw Lewis structures for each of the following. Please make sure your document is neat; please also make sure that all of the chemical symbols are correct, and the electrons can be clearly seen. Upload your document when complete. 1. PBr3 2. NyH2 3. C2H2 4. N₂ 5. NCI

Mass percent of dolomite in the soil sample is approximately 16.4%.

Dolomite is a type of mineral composed of calcium magnesium carbonate with the chemical formula CaMg(CO3)2.

Moles of HCl used in the titration:

0.2516 mol/L × 0.04620 L = 0.0116 mol HCl

Since the reaction between HCl and CaCO3 is a 1:1 stoichiometric ratio, the moles of CaCO3 in the soil sample is also 0.0116 mol.

0.0116 mol CaCO3 × 100.09 g/mol = 1.16 g CaCO3

Since dolomite is a mixture of calcium carbonate and magnesium carbonate (MgCO3), we need to convert the mass of CaCO3 to the mass of dolomite by using the ratio of the molecular weights of CaCO3 and CaMg(CO3)2:

100.09 g CaCO3 / (2 × 84.31 g CaMg(CO3)2) = 0.595

So the mass of dolomite in the soil sample is:

1.16 g CaCO3 / 0.595 = 1.95 g CaMg(CO3)2

mass percent = (mass of dolomite / mass of soil) × 100%

mass percent = (1.95 g / 11.87 g) × 100%

mass percent = 16.4%

Therefore, mass percent of dolomite in the soil sample is approximately 16.4%.

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Nitriding is a surface treatment process used to enhance the strength of steel components by diffusing nitrogen into the surface. It has been determined that achieving a satisfactory depth of the nitrogen layer is crucial for optimizing the desired mechanical properties.

1. In nitriding, the steel component is exposed to a nitrogen-rich environment at elevated temperatures. This enables nitrogen atoms to diffuse into the surface, forming a hardened layer known as the nitride layer. The depth of this layer is a critical factor as it directly influences the component's mechanical properties, such as hardness, wear resistance, and fatigue strength.

2. To achieve a satisfactory depth of the nitrogen layer, several factors need to be considered. Firstly, the nitriding process parameters, including temperature, time, and gas composition, must be carefully controlled. Different steels require specific nitriding conditions to achieve the desired results. Additionally, the surface preparation of the steel component plays a crucial role in the nitriding process. Proper cleaning, polishing, and removal of any contaminants or oxides are essential to facilitate nitrogen diffusion.

3. Furthermore, the composition of the steel itself influences the nitriding process. Steels with a higher content of alloying elements like chromium, aluminum, and molybdenum tend to form thicker nitride layers. The diffusion rate of nitrogen is influenced by the presence of these alloying elements, which promotes the formation of stable nitrides.

4. In conclusion, achieving a satisfactory depth of the nitrogen layer in the nitriding process is crucial for enhancing the strength of steel components. This involves controlling process parameters, surface preparation, and considering the steel composition. By carefully optimizing these factors, manufacturers can achieve the desired mechanical properties and improve the performance and durability of the treated components.

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QUESTION: Nitriding is a process in which nitrogen is allowed to diffuse into the surface of steel for the purpose of increasing the surface hardness of a component. It has been determined that a satisfactory nitrogen case depth is produced in BCC iron after 1 hour at 700°C. How much time is required toproduce a satisfactory case depth if nitriding is carried out at 600°C?

Answer:

The object Genesis sees is black.

Explanation:

The color an object reflects represents what the object's color is. For example, if a block reflects blue light, then only blue light is sent to our eyes, and hence we see the block as blue.

If an object absorbs all visible light waves, then, that means there's no visible light reflected, and we cannot see any color the object has. Hence, it is black in our eyes.

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The value of the equilibrium constant is independent of the initial concentration of the reactants. It has a definite value for every reversible reaction at a particular temperature.

The equilibrium constant can be defined as the ratio of the product of molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation.

The expression of the equilibrium constant is:

Keq = [AD]² [BD]² [C]⁴ / [AB]²[CD]⁴

Thus the expression of the equilibrium constant is determined.

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Answer:

1 mole is equal to 1 moles NaOH, or 39.99711 grams.

Explanation:

Hope this helps have a nice day :)

The statement of the mass of sodium hydroxide (NaOH) is "130 g."

A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.

In order to determine the mass in grams, multiply moles of the substance value by its molar mass to convert moles into grams.

Mole to gram conversion factor,

\(=\;given \;mole\;.\;\frac{grams}{1\;mol}\)

Mass of NaOH comes out to be,

\(=\;3.25\;mol\;.\;\frac{39.997\;g}{1\;mol}\)

= 129.99 g

= 130 g

Hence the correct answer is 130 g.

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Answer:

Well why didn't you do it? Have a great day and I am so sorry for wasting your points I don't need them. I hope someone helps!! ;)

Explanation:

Chlorine gas has the the chemical formula \(Cl_{2}\) ,Solid phosphorus has the chemical formula \(P_{4}\) ,Phosphorous pentachloride has the chemical formula \(PCl_{5}\), The final balanced equation is \(P_{4}\)  + 10 \(Cl_{2}\)   ...........> 4 \(PCl_{5}\),

distorted vision blisters, redness, and burning sensation on the skin after exposure to gas. If skin is subjected to liquid chlorine, it may suffer injuries resembling frostbite. feeling of burning in the eyes, throat, and nose.

The taste and smell of chlorine gas are both disagreeable. In concentrations as low as 1 part of every million, it can be detected (ppm). As an oxidizing agent, chlorine corrodes the metals used in plumbing and kitchen appliances. Equipment gaskets might become brittle due to corrosion from chlorine.

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Answer:

0.85 Molar Na2O

Explanation:

Determine the moles of sodium oxide, Na2O, in 10 grams by dividing by the molar mass of Na2O (61.98 g/mole).

 (10 g Na2O)/(61.98 g/mole) = 0.161 moles Na2O.

Molar is a measure of concentration.  It is defined as moles/liter.  A 1 M  solution contains 1 mole of solute per liter of solvent.  [200 ml water = 0.2 Liters water.]

In this case, we have 0.161 moles Na2O in 0.200 L of solvent.

 (0.161 moles Na2O)/(0.200 L) = 0.85 Molar Na2O

The mass of ammonia that can be produced from the reaction of 74.2 g of N₂ and 14.0 moles of H₂ is 90.1 g.

The mole ratio of the reaction for the production of ammonia is obtained from the balanced equation of the reaction as follows:

Equation of the reaction: N₂ (g) + 3 H₂ (g) → 2 NH₃ (g)

The mole ratio of the reactants nitrogen and hydrogen is 1 : 3

Moles of nitrogen in 74.2 g of nitrogen = 74.2/28

Moles of nitrogen in 74.2 g of nitrogen = 2.65 moles

Moles of hydrogen present = 14.0 moles

The limiting reactant is nitrogen

Mole ratio of nitrogen to ammonia is 1 : 2

Mass of ammonia produced = 2.65 * 2 * 17 g

Mass of ammonia produced =  90.1 g

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Answer:

all of the above

Explanation:

Answer:

All of the above

Explanation:

Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.

Melting:

A substance changes from solid to liquid on applying heat...

Sublimation:

A substance changes from solid to gas directly (without undergoing liquid state) on applying heat...

Ketoses such as fructose are expected to give a positive Tollens test because of their ability to reduce Tollens' reagent.

The Tollens test is a chemical reaction used to test for the presence of aldehydes. The test is named after the German chemist Bernhard Tollens. The Tollens reagent is a solution of ammoniacal silver nitrate, Ag(NH3)2NO3. The test is based on the fact that aldehydes are readily oxidized to carboxylic acids by a solution of silver nitrate in ammonia.

This reaction is exothermic and produces a silver mirror on the inside of the test tube.The test solution is prepared by adding a few drops of a solution of Tollens' reagent to the substance being tested. The test solution is then heated in a water bath for a few minutes.

If the substance being tested is an aldehyde, it will reduce the silver ions in the Tollens' reagent to metallic silver. The metallic silver will form a mirror on the inside of the test tube. If the substance being tested is not an aldehyde, no mirror will form.The aldehydes are more easily oxidized than the ketoses.

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Answer:

Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one (+1) and a mass of 1 atomic mass unit (amu), which is about 1.67×10−27 kilograms.

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The given chloride level in Michelle's blood is 0.55 g/dL. Now we need to convert this value into milliequivalents per liter.

Chloride has a molar mass of 35.45 g/mol. The equation for calculating milliequivalents per liter is:milliequivalents per liter (mEq/L) = (mass in g / molar mass) x 10So, milliequivalents per liter (mEq/L) of Michelle's blood is:0.55 g/dL = 0.55 x 10 / 35.45 mEq/L (since 1 dL = 1000 mL)0.55 x 10 / 35.45 ≈ 0.1561 (rounded to four significant figures)So, the value of chloride level in milliequivalents per liter in Michelle's blood is approximately 0.1561 mEq/L (to two significant figures, the answer is 0.16 mEq/L).Thus, the correct answer is IVAL 0.16 mEq/L.

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Answer:

–253.5 °C

Explanation:

We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO₂ = 6 g

Mole of CO₂ =.?

Mole = mass / molar mass

Mole of CO₂ = 6 / 44

Mole of CO₂ = 0.136 mole

Next, we shall convert 225 mL to L.

1000 mL = 1 L

Therefore,

225 mL = 225 mL × 1 L / 1000

225 mL = 0.225 L

Next, we shall determine the temperature of the gas. This can be obtained as follow:

Pressure (P) = 0.855 atm

Volume (V) = 0.225 L

Number of mole (n) = 0.136 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

PV =nRT

0.855 × 0.255 = 0.136 × 0.0821 × T

0.218025 = 0.0111656 × T

Divide both side by 0.0111656

T = 0.218025 / 0.0111656

T = 19.5 K

Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 19.5 K

T(°C) = 19.5 – 273

T(°C) = –253.5 °C

Therefore, the temperature of the gas is –253.5 °C

If the bus had uniform acceleration, the final velocity of the bus is 14.4 m/s and acceleration is 0.0040 m/s²

According to question

The distance between  Khanikhola and Kathmandu

d = 26 km

= 26000 m

Time,

t = 1 hour

= 3600 seconds

Step-wise explanation:

Consider a is the acceleration of the bus. By using second equation of motion,

d = ut + \(\frac{1}{2} at^{2}\)

Where

u is the initial speed of the bus,

u = 0

a = \(\frac{2d}{t^2}\)

a = \(\frac{2 \times 26000}{3600^2}\)

a = 0.0040 m/s²

By using first equation of motion.

Final velocity, v = u +at

So,

v = 0+0.0040(3600)

v = 14.4 m/s

a = 0.0040 m/s², v = 14.4 m/s.

If the bus had uniform acceleration, the final velocity of the bus is 14.4 m/s and acceleration is 0.0040 m/s².

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In the box on a periodic table  we can find its atomic number, symbol, average atomic mass, and (sometimes) name of the element.

By the 20th century, it was clear that atomic numbers, not atomic masses, were involved in the periodic relationship. The periodic law, a more recent formulation of this relationship, states that an element's properties are a periodic function of its atomic number.

The elements are arranged in a modern periodic table in increasing order of their atomic numbers, and atoms with comparable properties are grouped in the same vertical column (Figure below). With its atomic number, symbol, average atomic mass, and (sometimes) name, each box represents an element. The elements are grouped in 18 vertical columns called groups and seven horizontal rows known as periods or series.

Each column's header lists the names of its groups. Roman numerals and capital letters have traditionally been used on labels in the United States. The IUPAC advises using the digits 1 through 18, and these labels are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the table's main body in order for it to fit on a single page.

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Answer:

it gonna have to be a

Explanation:

Answer:

The answer is C, D, and E

Explanation:

Edunuity 2020- 2021

Answer:

660 cubic millimeters

Explanation:

Assuming this is a cube - the equation is Volume = L × W × H - plug in all the numbers provided and you get 660 cubic millimeters.

Answer:

The answer to your question is molecules.

The process through which a reactant loses electrons during a chemical reaction is known as oxidation. Reduction refers to the process through which a reactant acquires electrons during a reaction.

Such a thing typically happens if an acid reacts with a metal. Oxidation describes the process through which a reactant loses electrons during a chemical reaction.

Adding oxygen or any electronegative element, or taking away hydrogen or any electropositive one, is what is meant by the term "oxidation" in Classical and earlier concepts. Adding hydrogen or another electropositive element, or getting rid of oxygen or another electronegative one, is what reduction is all about, according to the classical or older idea.

An example of oxidation is C + O₂→ CO₂

An example of reduction is N₂ + 3H₂ → 2NH3

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Answer:

Explanation:

Answer:

\(\huge\boxed{\sf Single \ displacement \ reaction}\)

Explanation:

There are 2 types:

\(\rule[225]{225}{2}\)

During the scientific investigation, a sample of matter break down into two kinds of atoms full stop the original sample is a compound because it is made up of two kinds of atoms.

Compounds are the substances made up of the mixing of two kinds of atoms or more than two kinds of atoms. An example is a water made up of hydrogen and oxygen.

A compound always contains more than one atom. This can be of similar atoms and this can be of different kinds of atoms.

Whereas the element is always made up of one kind of atom. That's why elements are the purest form of atoms. So the given compound is breakdown into two kinds of atoms, so it is a compound, not an element.

Thus, because the original sample was made up of two separate components rather than just one, it was a compound.

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Answer:

Approximately 7.65

Explanation:

math.

skillz.

When the number of moles is less than 0.35 Therefore, KMnO4 will not dissolve because the number of moles is less than 0.35 mol.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

When we know that the solubility of KMnO4 is 6.4 g/100mL

Therefore, 6.49 g → solve in 100mL

        ?      ←  solve in 500mL

The amount of KMO4 soluble in 500mL

= (500X 6.49) /100

= 32.45 g

The molar mass of the KMnO4 = 158/mol

we can get the number of moles of KMnO4 = mass of KMnO4 / molar mass of KMnO4

number of moles of KMnO4 = 32.45 / 158

= 0.2 mol

Thus, When the number of moles is less than 0.35 Therefore, KMnO4 will not dissolve because the number of moles is less than 0.35 mol.

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\(HELLO!\)

To completely describe an electron in an atom, four quantum numbers are needed:

                                          \(MiraculousAlejandra\).

Granola is a heterogeneous mixture.

Heterogeneous mixture is a mixture that does not resemble the uniform mixture and the mixture appears non-uniform.

Granola is a heterogeneous mixture in which Oats, nuts, honey, or other sweetener including brown sugar are commonly incorporated to make granola, that is then typically roasted until it is crunchy, toasted, and golden brown. Periodically, raisins will be added.

Since, different individual could be seen hence it is a heterogeneous mixture.

Hence, Granola is a heterogeneous mixture.

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