The engineering process defines the steps engineers take to create
technology. Which of these describes these steps in the correct order?
O A. Identifying a problem, making a solution, testing the solution,
mass production, making improvements
O B. Identifying a need, researching the background of that need,
making a plan to meet the need, doing the work, evaluating the
results, looking for improvements
C. Identifying a problem, testing various solutions, researching side
effects of each solution, choosing a solution, looking to improve
the solution, planning how to test the solution
D. Identifying a problem, brainstorming solutions, researching the
background of each solution, testing solutions, choosing a
solution, production, making future improvements

The charged particles involved in  Thomson’s cathode–ray tube experiment is the negatively charged particles that we now call electrons.

The charged particles involved in the mass spectrometer is positively charged ions that is being deflected by magnetic fields.

The Mass spectrometer is an analytical tool that is used to measure the mass-to-charge ratio of ions.

One of the advantages of the mass spectrometer is that it is an excellent tool for identifying unknown components in a sample or confirming their presence.

The major disadvantages of mass spectrometer is that it is not very good at identifying hydrocarbons that produce similar ions and it's unable to tell optical and geometrical isomers apart.

In conclusion, some applications of mass spectrometer includes drug testing and discovery, food contamination detection.

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Answer:

A. K₂C₂O₄          Potassium oxalate

B. CuC₂O₄          Copper oxalate

C. Bi₂(C₂O₄)₃         Bismuth (III) oxalate

D. Pb(C₂O₄)₂         Lead (IV) oxalate

E. (NH₄)₂C₂O₄       Ammonium oxalate

F. HC₂O₄⁻             Acid oxalate

Explanation:

C₂O₄⁻²  → oxalate anion

This is the conjugate base from the H₂C₂O₄ which is the oxalic acid. A weak dyprotic acid that can release 2 protons.

A. 2K⁺  +  C₂O₄⁻²  → K₂C₂O₄          Potassium oxalate

It can be formed by the neutralization of the acid with the base

H₂C₂O₄  + 2KOH  → K₂C₂O₄  +  2H₂O

B. Cu²⁺ +  C₂O₄⁻²   ⇄  CuC₂O₄  ↓

This is a precipitate.

C.  2Bi³⁺  +  3C₂O₄⁻²   ⇄  Bi₂(C₂O₄)₃  ↓

This is a precipitate.

D.  Pb⁴⁺ +  2C₂O₄⁻²   ⇄  Pb(C₂O₄)₂  ↓

This is a precipitate.

E. 2NH₄⁺  +  C₂O₄⁻²   ⇄  (NH₄)₂C₂O₄  ↓

This is a precipitate.

F. This is the conjugate strong base, for the weak acid

H⁺  +  C₂O₄⁻²   ⇄  HC₂O₄⁻

HC₂O₄⁻  + H₂O  ⇄  C₂O₄⁻²  +  H₃O⁺    Ka

HC₂O₄⁻  + H₂O  ⇄  H₂C₂O₄  +  OH⁻    Kb

HC₂O₄⁻  is an amphoteric compound

A. K₂C₂O₄            →Potassium oxalate

B. CuC₂O₄           →Copper oxalate

C. Bi₂(C₂O₄)₃        →Bismuth (III) oxalate

D. Pb(C₂O₄)₂        →Lead (IV) oxalate

E. (NH₄)₂C₂O₄      →Ammonium oxalate

F. HC₂O₄⁻             →Acid oxalate

Given:

It is the conjugate base from the H₂C₂O₄ which is the oxalic acid. A weak diprotic acid that can release 2 protons.

The reactions involved in this are:

A. 2K⁺  +  C₂O₄⁻²  → K₂C₂O₄          

B. Cu²⁺ +  C₂O₄⁻²   ⇄  CuC₂O₄  ↓

C. 2Bi³⁺  +  3C₂O₄⁻²   ⇄  Bi₂(C₂O₄)₃  ↓

D. Pb⁴⁺ +  2C₂O₄⁻²   ⇄  Pb(C₂O₄)₂  ↓

E. 2NH₄⁺  +  C₂O₄⁻²   ⇄  (NH₄)₂C₂O₄  ↓

↓- This symbol denotes the precipitate formation.

F. H⁺  +  C₂O₄⁻²   ⇄  HC₂O₄⁻

HC₂O₄⁻  is an amphoteric compound.

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Answer:

1.47 atm

Explanation:

Step 1: Given data

Step 2: Calculate the final pressure of the gas

We can calculate the final pressure of the gas using the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

P₂ = P₁ × V₁ × T₂ / T₁ × V₂

P₂ = 1 atm × 32.4 L × 352 K / 273 K × 28.4 L = 1.47 atm

Answer:

Kinetic energy might transferred from one particle to another during an elastic collision, but  i don't think that there is going to be any change in the total energy of the colliding particles. Because there are no forces of attraction or repulsion between gas particles .

Explanation:

Display data associated with the ID such as age and other information.

Glassy unfocused eyes slow speech and movement or difficulty with small motor skills indicate a slow reaction. State ID cards, passports military ID cards, and driver's licenses are acceptable forms of ID in most states. Permanent Resident Cards may be accepted in some areas, but check with your administrator.

When a liquor store has carefully examined the identity of a customer before serving alcoholic beverages and reached a reasonable conclusion. Even if it turns out to be a fake ID and the appearance of the minor suggests the minor may be over the age of 21 or doing things she normally wouldn't. It is legally permissible even if it suggests that it is sexual. This can be a behavioral sign of addiction. Delayed reaction time Your body reacts and acts slower.

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The value of ΔG at 25 °C for the given reaction is: ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol So, the correct answer is -370.4 kJ/mol

To determine the value of ΔG (Gibbs free energy) at 25 °C for the given reaction:

25 (s, rhombic) + 3/2 \(O_2\)(g) → \(2SO_3\)(g)

We can use the equation:

ΔG = ΔG° + RT ln(Q)

where:

ΔG is the standard Gibbs free energy change

ΔG° is the standard Gibbs free energy change under standard conditions

R is the gas constant (8.314 J/(mol·K) or 0.008314 kJ/(mol·K))

T is the temperature in Kelvin (25 °C = 298 K)

Q is the reaction quotient, which is the ratio of the concentrations of the products to the concentrations of the reactants at a given point during the reaction.

Given that ΔG° is -370.4 kJ/mol, we can plug the values into the equation:

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(Q)

Now, we need to determine the value of Q. Since all reactants and products are in their standard states, Q = 1, as their concentrations are taken to be 1.

ΔG = -370.4 kJ/mol + (0.008314 kJ/(mol·K) * 298 K) * ln(1)

Since ln(1) = 0, the term (0.008314 kJ/(mol·K) * 298 K) * ln(1) becomes 0.

Therefore, the value of ΔG at 25 °C for the given reaction is:

ΔG = -370.4 kJ/mol + 0 = -370.4 kJ/mol

So, the correct answer is -370.4 kJ/mol.

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Explanation:

₇N = 1s² 2s² 2p³

Therefore,

Option C is correct ✔

Answer:

The cell on the left is animal, The cell on the right is a plant cell.

Explanation:

1: cell membrane

2: chloroplast

3: cell wall

4: vacuole

5: mitochondria

6:nucleus

7: lysosome

8: cytoplasm

Things to remember, only plant cells have cell walls. Plant cells are the only ones that have chloroplast.

Okay, let's solve this step-by-step:

1) The standard reduction potentials for Cu2+/Cu are: E°Cu2+/Cu = +0.34 V.

This is the reduction potential when [Cu2+] = 1 M and [Cu] = 1 M.

2) The actual reduction potential (Ered) depends on the concentrations of oxidized and reduced species.

Here,

[Cu2+] = 4.48 M on the right side.

[Cu2+] = 0.0032 M on the left side.

3) Ered = E° + 0.0591 log([oxidized]/[reduced]) (Nernst equation)

So for the right side:

Ered = +0.34 + 0.0591 log(4.48/1) = +0.34 + 0.186 = +0.526 V

And for the left side:

Ered = +0.34 + 0.0591 log(0.0032/1) = +0.34 - 0.093 = +0.247 V

4) The cell potential (Ecell) is the difference between the two half-cell potentials:

Ecell = +0.526 - 0.247 = +0.279 V

So the cell potential for the given reaction at 25°C is +0.279 V.

Let me know if you have any other questions!

➢ A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react together to form a salt and water as products.

➢In a neutralization reaction, there is a combination of H+ ions and OH– ions which form water. A neutralisation reaction is generally an acid-base neutralization reaction.

Neutralization Reaction Equation:-

Neutralization Reaction Examples:-

________________________________

Answer: A reaction that removes essentially all H+ and OH-

Explanation:

Answer:

One cubic centimeter is equal to one milliliter. Cubic centimeter is used interchangeably with millimeter. Centimeter belongs in the CGS unit system (centimeter-gram-second system) while liter belongs in the SI (Système International d'Unités)  unit system. These two are equal.

Explanation:

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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Answer:

C i think

Explanation:

The mass of \(H_2\) that will be formed when 35.25 g Al reacts with excess hydrochloric acid would be 3.93 g.

The equation of the reaction of aluminum metal with hydrochloric acid to produce hydrogen gas is represented below:

\(2Al + 6HCl -- > 2AlCl_3 + 3H_2\)

From the equation, one would see that the mole ratio of aluminum to the hydrogen gas produced is 2:3.

Now, with 35.25 g of aluminum, recall that: mole = mass/molar mass.

The molar weight of aluminum is 27 g/mol.

Thus:

Mole of 35.25 g Al = 35.25/27

                                = 1.31 mol

From the mole ratio, the mole of hydrogen that will be produced would be:

3/2 x 1.31 =1.97 mol

The molar mass of \(H_2\) is 2 g/mol, the mass of 1.97 mol hydrogen gas can be calculated as:

Mass = mole x molar mass

         = 1.97 x 2

        = 3.93 grams

In other words, the amount of \(H_2\) that would be formed when 35.25 g All reacts with excess hydrochloric acid would be 3.93 g.

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Two types of data that can be obtained from descriptive statistics include frequency distribution and variability in the data set. These data are calculated as the mean of standard deviation in the case of variation.

The relative importance of the science field of descriptive statistics is based on the obtention of statistically significant measurements in order to validate a hypothesis.

Therefore, with this data, we can see that the relative importance of the science field of descriptive statistics is based on testing working hypotheses.

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said that the wi had to do it in the afternoon to do so cute for a few minutes to do so I would say I love the axon the same way you 6AM

Explanation:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. ... This extra carbon dioxide is lowering the ocean's pH, through a process called ocean acidification.

Answer:

thanks

Explanation:

thanks

Answer:

During complete combustion, natural gas combines with oxygen to produce carbon dioxide and water vapor.

Explanation:

A fuel undergoes a complete combustion process when it swiftly combines with oxygen (O2), which then forms carbon dioxide (CO2) and water (H2O).

Answer:

no it cant

Explanation:

3 moles of I2 will be formed from 3 moles of chrlorine gas.

Explanation:

This is because, when you balance the given equation it allows for the mole ratio between the two given elements to be 1:1 so therefore 3 moles of chlorine gas will produce 3 moles of I2.

Answer: The correct option is B. elements.

Explanation:

A chemical compound is defined as the specie which is formed by the combination of two or more elements. For example: Water, carbon dioxide, etc..

Elements is defined as the chemical specie which consists of only one type of atom. For example: Hydrogen, Oxygen, etc..

Now, when hydrogen element and bromine element combines, it leads to the formation of a heteronuclear chemical compound known as hydrogen bromide having chemical formula HBr.

Hence, the correct option is B. elements.

Hydrogen and bromine are two elements that form hydrogen bromide (HBr).

COMPOUND:

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The S8 molecules break up. When suddenly cooled, long chain molecules are formed in the plastic sulfur which behave as rubber. Plastic sulfur transform into rhombic sulfur over time.

Answer:C and D

Explanation:Just did it

Increasing the pressure and Decreasing the temperature are the two changes would make this reaction product-favored.

It is a state when a reaction is reversible and both forward and reverse reaction occur simultaneously at the same rate .

In the process of manufacture of Ammonia , both forward and reverse reaction are taking place

N₂(g) + 3H₂ (g) →  2NH₃ (g)

2NH₃(g)  →  N₂ (g) + 3H₂ (g)

when these reaction occur at same rate , the state is called equilibrium and is represented by

N₂ (g) + 3H₂(g) ⇔ 2NH₃(g) +Heat

As we can see from the equation , heat is produced in the forward reaction so if we increase the temperature the reverse reaction will be favored ,

On decreasing temperature the reaction will become product favored .

While on increasing the Pressure the manufacture of Ammonia increases.

Therefore Option C and Option D are the two changes would make this reaction product-favored.

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A hypothesis is a proposed explanation or prediction based on limited evidence or observations, which can be tested through further investigation or experimentation. It should be specific, testable, and based on existing knowledge.

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Answer:

C.

Explanation:

Chemical structure

Combining "hydro" and "genes" in the context of the Latin roots, we can interpret it as "water origin" or "water-related origin."

The term "hydro" in Latin means "water." It is derived from the Greek word "hydor," which also signifies water. "Hydro" is commonly used as a prefix in scientific terms related to water or hydrogen. In the context of chemistry, "hydro" often denotes a compound or process involving water or hydrogen atoms. For example, hydrocarbon refers to organic compounds composed solely of hydrogen and carbon atoms.

On the other hand, "genes" in Latin is derived from the Greek word "genos," which translates to "origin" or "birth." In biology, the term "genes" refers to the segments of DNA that contain instructions for the development and functioning of living organisms. Genes determine various traits, such as physical characteristics, behavior, and susceptibility to certain diseases. They play a fundamental role in the transmission of hereditary information from one generation to another.

This interpretation aligns with the understanding that hydrogen, which is essential for life and abundant in water, plays a vital role in various biological and chemical processes.

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Answer: 380 J. Please mark

Explanation:

Sally is wrong because copper is less electropositive than hydrogen, thus, can not displace hydrogen from dilute acids.

The reactions to prepare copper (ii) chloride are:

the chlo­ri­na­tion of cop­per sul­fide at a high tem­per­a­ture

reaction of copper (ii) oxide with dilute hydrochloric acid

The equations of the given reactions are as follows:CuS + Cl₂ ---> CuCl₂ + SCuO + 2HCl ----> CuCl₂ + H₂O

Reactive metals are metals that readily give up their electrons to form positive ions.

Reactive metals displace hydrogen from dilute acids. They are found in group 1A and 2A of the periodic table. Copper is not a reactive metal and will not displace hydrogen from acids.

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Sally is wrong because copper chloride is not made from the reaction of copper and dilute hydrochloric acid.

2. Copper (ii) chloride can be prepared as follows:

3. the equations of the reaction are:

Single replacement reactions are reactions in which a more reactive atom replaces another atom in a compound.

An example of a single replacement reaction is the reaction of chlorine gas with copper sulfide at high temperatures to form copper chloride.

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