Select the correct answer.

What is a nonpolar covalent bond?

A.
a bond between two nonmetal atoms
B.
a bond in which electrons are shared unequally
C.
a bond with ΔEN greater than 0.5
D.
a bond between two atoms that have equal electronegativities

Detergent enzymes are better because they help limit phosphate pollutants in the environment. Option 3.

Phosphates are a common ingredient in traditional laundry detergents, but they can have harmful effects on the environment.

When phosphate-containing detergents are used, the phosphates can end up in waterways and cause excessive algae growth, leading to decreased oxygen levels in the water and harm to aquatic life.

Enzyme-based detergents can be a more environmentally friendly option as they do not contain phosphates, reducing the amount of phosphate pollution released into the environment.

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Menthol is a substance commonly used in cough drops. It has a molar mass of 156.3 g/mol and is comprised of 77.4% carbon and 12.9% hydrogen and 10.2% oxygen. The molecular formula is C[tex]_{10}[/tex]H[tex]_{20}[/tex]O.

The precise quantity and kind of atoms that make up a single chemical molecule are specified in its molecular formula. A compound's constituent elements are denoted by their chemical symbols, which are followed by numerical subscripts that indicate how many atoms of each constituent are contained in the molecule.

A molecular formula does not have a chemical name and is wordless. A molecular formula may suggest particular simple chemical structures, but it is not the same as a formula for the entire chemical structure. Compared to structural formulas, they are more restrictive.

moles of carbon =0.122/12=0.010

Moles of Hydrogen =0.0204/1=0.0204

moles of oxygen = 0.0171/16 =0.0017

Dividing by simple whole number ratio

The ratio of C : H : O = 10 : 20 : 1. The molecular formula is C[tex]_{10}[/tex]H[tex]_{20}[/tex]O.

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The statements that are correct is that electrons are attracted towards higher potential and protons are attracted towards lower potential. So the correct option is d. I & IV

Electrons are particles that are negatively charged so if it is placed in an electric field it will move from negative to positive, due to its negative charge, then it will attract a higher potential.

Protons are particles that are positively charged so if it is placed in an electric field it will move from a positive to a negative side, then due to its positive charge, it will be attracted to a lower potential.

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Q_w = 307.3 J

C_m = .233 J/g•K

%error = 39.95%

For simplicity's sake, I'm relabeling

Q_w as Q1

m_w as m1

C_w as c1

T_eq as T2

T_w as T1

Q_m as Q2

m_m as m2

C_m as c2

experimental value as exp

actual value as actual

Question 1

Q1 = m1•c1•(T2-T1)

Identify what you know

m1 = 124g

c1 = 4.13 J/g • K

T2 = Final temperature = 22.3°C

T1 = Initial temperature = 21.7°C

Convert Celsius to Kelvin (C+273.15=K)

T2 = 295.45 K

T1 = 294.85 K

Plug in

Q1 = 124g•(4.13 J/g•K)•(295.45K - 294.85K)

Solve

Q1 ≈ 307.3 J

Question 2

-Q1 = Q2 = m2•(c2)•(T2-100)

Ignore Q2 for a second, and you're left with

-Q1 = m2•(c2)•(T2-100)

which is the same thing.

Identify what you know

Q1 = 307.3 J

m2 = 17g

T2 = 22.3°C

Plug in

-(307.3J) = 17g • c2 • (22.3°C-100°C)

Solve

-307.3 J = (-1320.9 g•°C) • c2

c2 = .233 J/g•°C or J/g•K (I'll explain later)

Question 3

%err = ((exp - actual)/actual) • 100%

Identify what you know

exp = .233 J/g•K

actual = .388 J/g•K

Plug in

%err = ((.233 J/g•K - .388 J/g•K)/ .388 J/g•K) • 100%

Solve

%err = -39.95 %

Take the absolute value

%err = 39.95%

Referring to earlier change in units:

The reason we can not use the K value of T2 (295.45K) is because the formula provided (T2-100) does not account for T2 being in K. It only accounts for T2 being in °C.

Note that the above prompt on Ecology draws it's analysis form a well known story which have been told visually called "The Lion King".

The answers are:

1) Biotic Factors, simply put are living things

2 examples of things from Lion King Introduction are:

3) Abiotic factors are Non -living things.

4) Examples from the introduction are:

5) the symbiotic relationship is called: commensalism.

Long-term biological interactions known as commensalism occur when individuals of one species benefit while those of the other species suffer neither advantages nor harm.

Ecology which is the study of the environment, allows  a person  to comprehend how different types of creatures coexist in various kinds of physical settings.

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Full Question:

Although part of your question is missing, you might be referring to this full question:

1) What is Biotic Factors

2) List three biotic factors from the Lion King introduction

3) What is Abiotic factors?

4) List three Abiotic factors from the Lion King introduction

5) The bird riding on the tusks of the elephant feed on insects the elephant stirs up. What kind of symbiotic relationship exists between the two?

Answer:

Please mark me brainliest

Explanation:

The answer is false.

opaque materials do not reflect any light because they absorb or trap all light that comes in contact with them. No light is able to return from within an opaque material or reflect off its inner surface. Opaqueness is defined by a lack of light reflection, transmission or scattering. Light either disappears or is converted into other forms of energy within opaque substances.

Please let me know if this helps explain why opaque materials do not reflect light or if any part of the description is unclear. I can also provide any additional examples or details if needed.

Answer: 19) False. A totally opaque material does not let any light pass through it.

If liquid carbon disulfide reacts with 4.5x10²ml of oxygen to produce the gases carbon dioxide and sulfur dioxide. 300mL  is the volume of each product is produced.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch.

Volume and length (cubed) have a symbiotic relationship. The volume more a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

CS[tex]_2[/tex] (l) + 3O[tex]_2[/tex] (g) → CO[tex]_2[/tex](g) + 2SO[tex]_2[/tex] (g)

3 moles of oxygen gas form one mole of carbon dioxide

4.50 x 10² mL, or 450. mL

150. mL of CO2 (g)

Since 3 moles of oxygen produce 2 moles of sulfur dioxide,

450. mL×(3/2) =300 mL of SO2 (g).

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M = 1.183

Molarity is moles/Liter, so setting up some equations gives you

1) 1M = Xmol/0.05L

2) 2.5M = Xmol/0.05L

3) 0.5M = Xmol/0.05L

Solve for each X

1) X = 0.05mol

2) X = 0.125mol

3) X = 0.0025mol

Now add all the moles and Liters (separately)

XM = (0.05+0.125+0.0025)mol/(0.05+0.05+0.05)L

XM = 0.1775mol/0.15L

X = 1.183M

The first half-reaction is the oxidation of Cr2O7^2– to Cr^3+ and the second half-reaction is the reduction of I^– to IO3^–. When combined, the overall reaction is Cr2O7^2– + I^– → Cr^3+ + IO3^–.

The electrolytic cell consists of two electrodes, one anode and one cathode, both of which are immersed in an electrolyte solution. At the anode, the Cr2O7^2– ions are oxidized to Cr^3+ ions, releasing electrons into the external circuit.

At the cathode, the I^– ions are reduced to IO3^– ions, and the electrons from the external circuit are used to drive the reaction. The electrolyte solution must contain both Cr2O7^2– and I^– ions in order to facilitate the transfer of electrons between the electrodes.

The overall reaction is driven by the potential difference between the anode and the cathode, which is created by the flow of electrons through the external circuit.

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The principal components of gasoline is 702 g of octane.

Thus, Crude oil and other petroleum liquids are used to create gasoline, a fuel. The majority of gasoline is utilized in car engines.

For retail sale at gas stations, finished motor gasoline is produced at petroleum refineries and blending facilities.

In order to create finished motor gasoline, petroleum refineries primarily produce gasoline blendstocks, which must be blended with other liquids. In order to create finished motor gasoline in various grades and formulas, gasoline blendstocks, finished gasoline, and fuel ethanol are combined at blending terminals.

Thus, The principal components of gasoline is 702 g of octane.

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The term mole concept is used here to determine the mass of sulfur dioxide.The mass of sulfur dioxide obtained from 50.0 g of hydrogen sulphide is 93.93 g.

One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:

Number of moles = Given mass / Molar mass

Here balanced reaction is:

2H₂S + 3O₂ → 2SO₂ + 2H₂O

n (H₂S) = n(SO₂)

n = 50.0 / 34.1 = 1.466

Molar mass of sulfur dioxide = 64.067 g/mol

Mass = n × M

m = 1.466 × 64.067 = 93.93 g

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If you increase the pressure of the reaction 2A(g) + B(g)C(g) + 2D(g)the reaction will shift forward to the side with little moles of gas.

Le Chatelier's principle states that if pressure is raised, the reaction will favor the direction with a lower number of gas moles.

On this  case, the cleared out side includes a add up to of three gas moles (two moles of A and one mole of B), whereas the correct side covers four gas moles (one mole of C and two moles of D). In this way, the balance will move towards the left-hand side in arrange to diminish the collective gas particles and relieve the rise in weight. The levels of A and B will rise, as the levels of C and D will decrease.

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Specific Heat = 2.5 J/g•°C

We can set up an equation to solve this.

(Energy) = (mass)•(specific heat)•(change in temperature)

Plug in what you know

-1500J = 120g•(c)•(40°C-45°C)

[The energy is negative because the energy is lost, and the change in temperature can be found by subtracting the initial temperature from the final temperature (T(Final) - T(Initial))]

Solve

-1500J = 120g•(c)•(40°C-45°C)

-1500J = 120g•(c)•(-5°C)

-1500J = (-600g•°C)•(c)

(-1500J) / (-600g•°C) = c

c = 2.5 J/g•°C

A gallon is a common volume measurement unit for measuring liquids and occasionally dry things. 5 gallon is equal to 18.925 L.

Thus, The US liquid gallon, US dry gallon, and Imperial gallon are the three different sorts of gallons. To measure and store commodities like fuel, oil, milk, paint, and many other things, these three types are frequently employed.

The English Parliament created the gallon in 1696 to be used for measuring dry goods. After gaining independence, the US adopted the Winchester gallon, which is now known as the US dry gallon.

Both are now referred to as US liquid gallon and US dry gallon, respectively. On the other hand, the Imperial gallon was adopted by the British Empire in 1834.

Thus, A gallon is a common volume measurement unit for measuring liquids and occasionally dry things. 5 gallon is equal to 18.925 L.

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The compound oxygen difluoride is quite reactive, giving oxygen and HF when treated with water. -126kj is the bond dissociation energy of the O–F bond in OF[tex]_2[/tex].

The amount of energy necessary to homolytically shatter a chemical bond is known as bond dissociation energy. Radical species are often produced by a homolytic fracture. The abbreviations BDE, D0, and DH° are used to denote this energy.

Bond dissociation power is frequently used to gauge a chemical bond's strength as well as for contrasting different bonds. Be aware that the enthalpy change depends on the temperature. Bond dissociation energy is often measured in kJ/mol or kcal/mol.

-318 kJ/mol = BDE for OF[tex]_2[/tex]+ BDE for H[tex]_2[/tex]O - BDE for O[tex]_2[/tex] - 2 x BDE for HF.

Substituting all the values, we get

BDE of O–F bond = -126kj

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The balanced redox reaction is:

6I2 + 42OH- → 6IO3- + 18H2O

We have to note that we can only say that a redox reaction have been balanced when the number of the electrons that were lost in the oxidation half equation is equal to the number of electrons that have been gained in the reduction half equation.

The balanced half reaction equations are;

I2 -→ IO3- + 6e (oxidation half-reaction)

6OH- + 6e- → 2H2O  (reduction half-reaction)

Thus adding the equations would give the balanced reaction equation.

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A - Has no hydrogen bond since hydrogen is not bonded to an electronegative element

B - Has a hydrogen bond due to the N- H bond

C - Has a hydrogen bond due to the O - H bond

D - Has a hydrogen bond due to the H -I bond

In a hydrogen bond, a weak electrostatic connection is created when the positively charged hydrogen atom is drawn to the negatively charged electronegative atom.

This contact is stronger than van der Waals forces but not as strong as covalent or ionic bonds or other intermolecular forces.

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From the titration curve that have been shown in the image, the equivalence point is 50 mL

At the equivalence point on a titration curve, the amount of titrant added is chemically equivalent to the amount of analyte in the sample being evaluated. As a result of the reaction between the titrant and analyte at this point, the entire analyte has been neutralized by the titrant.

You can locate the equivalence point by plotting the pH or any relevant aspect of the sample under examination as a function of the volume of titrant used.

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Molarity is an important method which is used to calculate the concentration of a solution. The molarity of 0.499 g of NaOH dissolved in 150.00 mL of water is  0.082 M.

Molarity of a solution is defined as the number of moles of the solute present per litre of the solution. The unit of molarity is mol L⁻¹ and it is represented as 'M'.

Molarity = Number of moles of solute / Volume of solution in L

150.00 mL = 0.15 L

Number of moles:

n = 0.499 / 40.00 = 0.0124 moles

M = 0.0124 / 0.15

M = 0.082

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Answer:

For aluminum + nickel(II) sulfate --> aluminum sulfate + nickel:

Al + NiSO4 --> Al2(SO4)3 + Ni

Using the tally method:

Al: 2

Ni: 1

S: 3

O: 12

The balanced equation is:

2Al + 3Ni(SO4) --> Al2(SO4)3 + 3Ni

For ammonium phosphate + magnesium nitrite --> magnesium phosphate + ammonium nitrite:

(NH4)3PO4 + Mg(NO2)2 --> Mg3(PO4)2 + 6NH4NO2

Using the tally method:

N: 6

H: 28

P: 2

O: 16

Mg: 3

The balanced equation is:

2(NH4)3(PO4) + 3Mg(NO2)2 --> Mg3(PO4)2 + 6(NH4)(NO2)

For lead + nitrogen --> lead(IV) nitride:

3Pb + 2N2 --> Pb3N4

Using the tally method:

Pb: 3

N: 8

The balanced equation is:

3Pb + 2N2 --> Pb3N4

Explanation:

The rate law for the reaction can be written as -

rate= k[C] [D]

The rate of reaction or reaction rate is the speed at which reactants are converted into products.

When we talk about chemical reactions, it is a given fact that rate at which they occur varies by a great deal. Some chemical reactions are nearly instantaneous, while others usually take some time to reach the final equilibrium.

The rate of the reaction is governed by the slow step.

This gives the rate equation-

rate= k[C] [D]

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Answer:

5.00 mol of an ideal gas will occupy 103.6 L at 25.0 C and 153 kPa of pressure.

Explanation:

Using the ideal gas law, PV=nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin, we can solve for V.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15 K. Therefore, the temperature is 25.0 + 273.15 = 298.15 K.

Next, we can plug in the values we know:

PV = nRT

(153 kPa) V = (5.00 mol) (8.31 J/mol*K) (298.15 K)

Simplifying:

V = (5.00 mol) (8.31 J/mol*K) (298.15 K) / (153 kPa)

V = 103.6 L

Therefore, 5.00 mol of an ideal gas will occupy 103.6 L at 25.0 C and 153 kPa of pressure.

The resultant solution has a molarity of 1 M.

To find the molarity of the resulting solution, calculate the total amount of moles of Kool-Aid and the total volume of the solution.

The moles of Kool-Aid in each cup can be calculated as:

moles = concentration (M) × volume (L)

Cup 1: moles = 0.05 L × 0 M = 0 mol

Cup 2: moles = 0.05 L × 2.5 M = 0.125 mol

Cup 3: moles = 0.05 L × 0.5 M = 0.025 mol

The total amount of moles is:

total moles = moles in cup 1 + moles in cup 2 + moles in cup 3

total moles = 0 mol + 0.125 mol + 0.025 mol

total moles = 0.15 mol

The total volume of the solution is:

total volume = volume in cup 1 + volume in cup 2 + volume in cup 3

total volume = 0.05 L + 0.05 L + 0.05 L

total volume = 0.15 L

Now calculate the molarity of the resulting solution:

molarity = total moles ÷ total volume

molarity = 0.15 mol ÷ 0.15 L

molarity = 1 M

Therefore, the molarity of the resulting solution is 1 M.

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The partial pressure of the gas in a mixture is the pressure that the gas would exert if present alone in the vessel at the same temperature as that of the mixture. Here the partial pressure of Xe is

The pressure exerted by a mixture of two or more non-reacting gases enclosed in a definite volume is equal to the sum of the partial pressures of the component gases.

According to Dalton's law of partial pressures, total pressure is:

P = p₁ + p₂ + ...

2.10 = 0.250 + 0.300 + p

p = 1.55

Partial pressure of Xe = 1.55

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The layers of the atmosphere with the boundaries that are between them are shown in the image attached here.

The troposphere, which rises up to an altitude of roughly 10-15 km, is the layer that is closest to the Earth's surface. The majority of the Earth's air mass is contained here, which is also where weather happens.

The tropopause marks the transition from the troposphere to the stratosphere, the next layer. It designates the altitude at which the temperature stops dropping.

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The solubility product of a sparingly soluble salt is defined as the product of molar concentrations of its ions in a saturated solution of it at a given temperature. The two important factors that affect the solubility product are pressure and temperature.

Using an electrical conductivity measurement, determine the ion concentration in a saturated solution and use this number to compute the solubility product.

Using a colorimetric technique, determine the ion concentration in a saturated solution and use this number to compute the Ksp.

It is the pressure which affects the solubility of gases only.

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The balanced equation for the reaction between [tex]Fe^+^2[/tex] and KMnO₄ is: MnO₄ + 8H+ + 5 [tex]Fe^+^2[/tex]⟶ [tex]Mn^+^2[/tex] + 5[tex]Fe^3^+[/tex] + 4H₂O. Therefore, the percentage by weight of iron in the steel sample is 1.94%.

Molarity of KMnO₄ = 0.110 M, Volume of KMnO₄ used = 39.23 mL = 0.03923 L

moles of  [tex]Fe^+^2[/tex] = 0.110 M x 0.03923 L / 5 = 0.000856 moles

The mass of iron in the steel sample can be calculated from the number of moles of  [tex]Fe^+^2[/tex]:

moles of Fe = 0.000856 moles  [tex]Fe^+^2[/tex] x 1 mole Fe / 1 mole  [tex]Fe^+^2[/tex]

= 0.000856 moles Fe

The mass of Fe can be calculated from the number of moles of Fe:

mass of Fe = 0.000856 moles Fe x 55.85 g/mol = 0.0479 g Fe

Finally, the percentage by weight of iron in the steel sample can be calculated as:

% Fe = (mass of Fe / mass of steel sample) x 100%

mass of steel sample = 2.470 g

% Fe = (0.0479 g / 2.470 g) x 100% = 1.94%

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