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Name a mixtures of at least 3 items each and how you would separate them. Explain why each of the step would work. Do not use any of the items mentioned in the previous question. (which is salt, sand, water, and iron)

Answer:

26.4g

Explanation:

The balanced chemical equation as stated in this question is given as follows:

Fe2O3 + 3CO → 2Fe + 3CO2

According to this balanced equation, 3 moles of carbon monoxide (CO) will react with 1 mole of Ferric oxide (Fe2O3).

We need to change 50.26 g of ferric oxide to moles by using the formula;

mole = mass/molar mass

Molar mass of Fe2O3 = 56(2) + 16(3)

= 112 + 48

= 160g/mol

mole = 50.26/160

mole = 0.314mol of Fe2O3

If 3 moles of carbon monoxide (CO) will react with 1 mole of Ferric oxide (Fe2O3).

Hence, 0.314 mol of Fe2O3 will completely react with (0.314 × 3) mol of CO

0.314 × 3 = 0.94 mol of CO

molar mass of CO = 12 + 16 = 28g/mol

mole = mass/molar mass

mass = mole × M.M

mass = 0.94 × 28

mass = 26.4g of CO

Answer:

C. Both processes convert mass into energy.

CO₃²⁻ ion has a trigonal planar geometry around the bold-faced atom, and its bond angle is 120⁰.

The three-dimensional configuration of the atoms that make up a molecule is known as molecular geometry.

In addition to bond lengths, bond angles, torsional angles, and any other geometrical factors that affect each atom's location, it also contains the molecule's overall structure.

The CO₃²⁻ ion possesses a trigonal planar molecular structure and electron geometry because it adheres to the AX₃ generic formula of the VSEPR theory module.

Because the core C atom in the CO₃²⁻ Lewis structure is connected to three bound oxygen atoms. Therefore, the VSEPR theory predicts that the CO₃²⁻ ion exhibits sp2 hybridization.

Thus, option C is correct.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Option C) New atoms are created when a new substance is formed is not true about the Law of Conservation of Mass.

The Law of Conservation of Mass states that "Mass can neither be created nor be destroyed". This means that the mass of an object will remain the same, regardless of the changes that occur to its form or composition. The law is a fundamental principle of physics and chemistry and is used to calculate the amount of matter that is present in a given sample.

The same number of atoms are in both the products and reactants as the mass of the reaction is conserved.

Since the same number of atoms are present in both reactants and products, then no new atoms or compounds are created in the process.

Hence, the correct option is C).

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Answer:

1 - Gravitational.

2 - Normal

3 - Tension

4 - Frictional

5 - Centripetal

Explanation:

1. If you drop something, gravity pulls it down to the Earth, So falling towards the earth is gravity.

2. Pushing back on another object is normal, Newton's law: Every action has an equal and opposite reaction.

3. When two forces are pulled on opposite sides, the object must stretch which creates tension. Think of a rubber band. If it is pulled more than the object can stretch, it will tear. Tensile strength refers to how much pulling force an object can withstand before it tears.

4. When objects or molecules rub against other objects or molecules they create friction.

5. Last two options go together.

Answer:

0.45688mL

Explanation:

1) First you should look on the coefficients.
\(2C_8H_{18(l)}\ + 25O_2_{(g)}=\ 16CO_{2(g)}+ 18H_2O_{(g)}\)

2) Do the ratio between C8H18 and O2:

\(C_8H_{18}\ \ \ \ \ \ \ \ \ O_2\\2 : \ \ \ \ \ \ \ \ \ \ \ \ \ 25\\X: \ \ \ \ \ \ \ \ \ \ \ 0.0500moles\\2X0.0500/25= 0.004\\X=0.004 \moles\ of\ C_8H_{18}\)

3) grams= moles X molecular mass

\(0.004*114.22= 0.45688g\)

[1g=1mL] => 0.45688mL

Answer:

0.16 L

Explanation:

Step 1: Write the balanced equation

C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g)

Step 2: Calculate the moles of CO₂ produced from 0.012 moles of O₂

The molar ratio of O₂ to CO₂ is 5:3. The moles of CO₂ produced are 3/5 × 0.012 mol = 0.0072 mol.

Step 3: Calculate the volume occupied by 0.0072 moles of CO₂ at standard temperature and pressure

At STP, 1 mole of CO₂ occupies 22.4 L.

0.0072 mol × 22.4 L/1 mol = 0.16 L

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It is likened to a fictional scenario in which a team of scientists and "sci-operatives" are working on upgrading their Battle Armor to withstand the attacks from a fictional entity called "THE HIVE."

The team is using thermodynamics, the study of heat energy and its transformations, to analyze the effectiveness of the materials used in the Battle Armor, including silver.

In this scenario, Mr. Pauling is creating a report that analyzes the heating curve for silver, which is used in the Battle Armor. The heating curve shows the changes in temperature over time as heat energy is added, and it helps to determine the melting and boiling points of the substance, as well as the conditions needed for a phase change.

It seems like the purpose of the activity is to understand the use of thermodynamics in analyzing the effectiveness of materials in the Battle Armor, and to look for messages from Mr. Pauling regarding any unfinished parts of the report.

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Explanation:

Boyle's Law

The characteristic that is representative of a FUSION reaction is that the reaction happens predominantly in stars.

The correct option is C.

The process of nuclear fusion is the union of two light atomic nuclei into one heavier one while releasing enormous quantities of energy.

Plasma, a hot, charged gas composed of free-moving electrons and positive ions, is the state of matter where fusion reactions take place. Plasma has special characteristics that make it different from solids, liquids, and other gases.

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Answer:

6.15.3 k

Explanation:

From the question we can see that

q = 0,  Δu = w

Then,

\(T_f = \frac{C_{V,m}+RP_{ext}P_i}{C_{V,m}+RP_{ext}P_f} T_i\)

putting values wet

=\(\frac{2.5\times 8.314+8.314\left(10^5\right)\left(3.20\times 10^5\right)}{2.5\times 8.314+\left(8.314\right)\left(10^5\right)\left(10^5\right)}\times \:293\)

T_f = 615.3 K

When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

Answer:

D is your correct answer

Explanation:

A combustion reaction is a type of chemical reaction in which a fuel reacts with an oxidizing agent, such as oxygen, to produce heat, light, and a variety of reaction products. These reactions typically release energy in the form of heat and light and are usually exothermic, meaning they release energy to the environment. The most common example of a combustion reaction is the burning of fossil fuels, such as coal, oil, and natural gas, which releases energy when they react with oxygen in the air. The chemical equation for a typical combustion reaction can be represented as:

Fuel + Oxygen → Heat + Light + Reaction Products

In a complete combustion reaction, all the carbon and hydrogen in the fuel react with oxygen to form carbon dioxide and water, respectively. In an incomplete combustion reaction, however, some of the carbon and hydrogen in the fuel remain uncombined, forming carbon monoxide and other toxic pollutants.

Answer:

D

Explanation:

A combustion reaction occurs when a substance reacts quickly with oxygen 

Answer:

2 CH₃OH  +  3 O₂  ⇒  2 CO₂  +  4 H₂O

Explanation:

Methanol is CH₃OH.  Oxygen is O₂.  A combustion produces CO₂ and H₂O.  Create an equation using this information and balance.

CH₃OH  +  O₂  ⇒  CO₂  +  H₂O

2 CH₃OH  +  3 O₂  ⇒  2 CO₂  +  4 H₂O

The balanced equation for the combustion of liquid methanol in air, assuming H2O(g) as a product is

CH₃OH(l) + O₂(g) → CO₂(g) + H₂O(g)

From the question,

We are to write a balanced equation for the combustion of liquid methanol in air.

The combustion of liquid methanol in air is the reaction between methanol (CH₃OH) and oxygen (O₂). The reaction yields carbon(IV) oxide and water.

Now, for the balanced equation for the combustion of liquid methanol in air

The balanced chemical equation is

CH₃OH(l) + O₂(g) → CO₂(g) + H₂O(g)

Hence, the balanced equation for the combustion of liquid methanol in air, assuming H2O(g) as a product is CH₃OH(l) + O₂(g) → CO₂(g) + H₂O(g)

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Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.

According to the concept of molar concentration, molarity of the solution is 1.525 M.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

In the given problem, by substituting values in mentioned formula related to moles we get,7.32/4.80=1.525 M.

Thus , the molarity of solution is 1.525 M.

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Answer:

81 gm

Explanation:

The mass of 1 mole is 27 gSo, Mass of 3 moles of Aluminium would be 3 × 27 = 81 gm

Thus mass of 3 Moles of Aluminium is 81 gm.

The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer: pure water is homogeneous and pure substance.

Explanation: However, when a homogeneous substance consists of two or more different types of molecules uniformly intermingled with one another, then it’s called a homogeneous mixture. A mixture’s composition can vary, but a pure substance does not.

Answer:

True

Explanation:

since the gases and minerals dissolved in water are in the same state as water and they do not form separate layers

Answer: oxidation state of the transition metaliii

Explanation:

Answer:

H₃O⁺.

Explanation:

Hello,

In this case, ionization of ethanol yields hydrogen cations and ethoxide anions as follows:

\(CH_3COOH+H_2O\rightleftharpoons H_3O^++CH_3COO^-\)

Which is at equilibrium as ethanol is a weak acid. Thus, since the conjugate acid is formed by the outgoing H⁺ and the water, we say that the conjugate acid is then the hydroxonium ion, H₃O⁺ whereas the conjugate base is the remaining anion CH₃COO⁻.

Best regards.

Answer: A

Explanation: red eye

Answer: Boiling point, because it can be observed by altering the state of the substance

Explanation:

Physical property is defined as the property of a substance which becomes evident during physical change in which there is alteration in shape, size etc. No new substance gets formed during physical change. Example: Melting point

Chemical property is defined as the property of a substance which becomes evident during chemical change in which a change in chemical composition takes place. A new substance is formed in these reactions. Example: Reactivity with other substances

Thus Boiling point is a propertywhich can be examined without altering the composition, because it can be observed by altering the state of the substance

Answer:

Explanation:

Resonance structure occurs in an organic compound that undergoes resonance effects. This resonance effect is sometimes called the mesomeric effect helps to increases the stability of organic compounds that have alternating single bonds and double bonds.

The second resonance structure diagram for the ion given in the question can be found in the attached diagram below.

Answer:

A. Concentration of diluted acid = 0.00389 M

B. Concentration of OH- in AgOH solution = 0.00012 M

Explanation:

A. Using the dilution formula: C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

From the data provided, C1 = 0.09714 M, V1 = 10.0 mL, V2 = 250.0 mL and C2 = ?

Making C2 subject of the formula above; C2 = C1V1/V2

C2 = 0.09714 M × 10 / 250 = 0.00389 M

B. Equation of the neutralization reaction is given below:

HCl + AgOH ---> AgCl + H₂O

From the equation, 1 mole of acid neutralizes 1 mole of base

Using the titration formula; CaVa/CbVb = na/nb

Where Ca is the concentration of the acid HCl = 0.00389 M

Va is the volume of acid = 7.93 mL

Cb is the concentration of base, AgOH = ?

Vb is volume of base = 250.0 mL

na/nb = mole ratio of acid and base = 1

Making Cb subject of the formula in the equation above; Cb = CaVa/Vb

Cb = 0.00389 M × 7.93 / 250

Cb = 0.00012 M

Phosphatidylserine is a type of phospholipid that is mainly found in cell membranes. Its structure is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule.

The fatty acid chains are hydrophobic, meaning they repel water, while the phosphate group and serine molecule are hydrophilic, meaning they attract water.

The glycerol molecule acts as a bridge that connects the two fatty acid chains to the phosphate group and serine molecule.
The structure of phosphatidylserine is important for its function in the cell membrane.

Because of the hydrophobic and hydrophilic components of its structure, phosphatidylserine is able to form a lipid bilayer, which is a barrier that separates the inside of the cell from the outside environment.

The hydrophilic heads of the phosphatidylserine molecules face outward and interact with water, while the hydrophobic tails face inward and repel water.
Phosphatidylserine also plays a role in cell signaling and apoptosis, which is programmed cell death.

It acts as a signaling molecule by binding to proteins that are involved in cellular pathways.

In addition, phosphatidylserine is translocated to the outer leaflet of the cell membrane during apoptosis, which signals to immune cells that the cell is ready to be removed.
In conclusion, the structure of phosphatidylserine is made up of two fatty acid chains, a phosphate group, a serine molecule, and a glycerol molecule. Its hydrophobic and hydrophilic components allow it to form a lipid bilayer in cell membranes, and it also plays a role in cell signaling and apoptosis.

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The type of reaction that will occur if AH is negative and entropy increases is option  A which is a spontaneous reaction .

The spontaneity of any chemical reaction depends on the Gibbs free reaction which is related to entropy change and enthalpy change.ΔG= ΔH-TΔS

Where T is temperature change in kelvin.If AH is negative, entropy will increases which is ΔS. Then the ΔG will depend on the temperature change.

If TΔS is larger than ΔH, the reaction will be spontaneous and ΔG will be negative which means the reaction will move forward without any external input.

When a change in entropy increases with the temperature in the system, the reaction will be spontaneous and this will make the Gibbs free energy to be negative.

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