How many monochlorination products (only constitutional isomers) can be formed from the reaction of (CH3)3CH with Cl2 and light? a. 2 b. 1 c. 4 d. 3

5/16 = 0.313

\(\sqrt{1/16}\) = 0.25

0.38(10) = 3.8

\(\sqrt{0.09}\) = 0.3

Answer:

Covalent

Explanation:

Covalent Bonds. Another type of strong chemical bond between two or more atoms is a covalent bond. These bonds form when an electron is shared between two elements and are the strongest and most common form of chemical bond in living organisms.

To determine the mass of oxygen in a 8.4 g sample of Al(NO3)3, we need to consider the molar mass of Al(NO3)3 and the ratio of oxygen atoms in the compound.

The molar mass of Al(NO3)3 can be calculated by adding the atomic masses of aluminum (Al), nitrogen (N), and oxygen (O) multiplied by their respective subscripts in the compound:

Molar mass of Al(NO3)3 = (1 × atomic mass of Al) + (3 × atomic mass of N) + (9 × atomic mass of O)

Using the atomic masses of Al (26.98 g/mol), N (14.01 g/mol), and O (16.00 g/mol), we can calculate the molar mass:

Molar mass of Al(NO3)3 = (1 × 26.98 g/mol) + (3 × 14.01 g/mol) + (9 × 16.00 g/mol)

= 26.98 g/mol + 42.03 g/mol + 144.00 g/mol

= 213.01 g/mol

Now, we can calculate the mass of oxygen in the sample using the molar mass ratio:

Mass of oxygen = (Number of moles of Al(NO3)3) × (Number of moles of oxygen per mole of Al(NO3)3) × (Molar mass of oxygen)

First, we need to calculate the number of moles of Al(NO3)3 in the 8.4 g sample:

Number of moles of Al(NO3)3 = Mass of sample / Molar mass of Al(NO3)3

= 8.4 g / 213.01 g/mol

≈ 0.0395 mol (rounded to four decimal places)

Since there are 9 oxygen atoms in one mole of Al(NO3)3, the number of moles of oxygen is:

Number of moles of oxygen = 0.0395 mol × 9

≈ 0.356 mol (rounded to three decimal places)

Finally, we can calculate the mass of oxygen:

Mass of oxygen = Number of moles of oxygen × Molar mass of oxygen

= 0.356 mol × 16.00 g/mol

≈ 5.70 g (rounded to two significant figures)

Therefore, the mass of oxygen in the 8.4 g sample of Al(NO3)3 is approximately 5.70 g.

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Answer:

5 hours.

Explanation:

Given that,

Initial time, \(T_i=6\ pm\)

Final time, \(T_f=11\ pm\)

We need to find how much time did it take the car to arrive.

Time =  final time-initial time

= 11 pm - 6 pm

= 5

So, it takes 5 hours by car to arrive.

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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When you react 8. 29M acetic acid with 8. 29M ethanol, the equilibrium concentration of acetic acid is 3. 28M. The equilibrium concentration (M) of ethyl acetate is 5 M.

When the observable parameters, such as colour, temperature, pressure, concentration, etc. do not vary, the process is said to be in equilibrium.

If "balancing" is the definition of the word "equilibrium," it follows that a chemical reaction represents a balance between the reactants and products involved in the reaction. In some physical processes, such as the melting of ice at 0°C, where both ice and water are present at equilibrium, the equilibrium state can also be observed.

Physical equilibrium refers to the equilibrium that results from physical processes like the melting of solids, the dissolution of salt in water, etc., while chemical equilibrium refers to the equilibrium that results from chemical reactions.

Given concentration of acetic acid is 3.28 M

(8.28-x)M = 3.28M

x = 5 M

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Answer:

The answer is (3) 1676 kJ. The heats of reaction at 101.3 kPa and 298 K for reaction: 4Al(s) +3O2(g)= 2Al2O3(s) is -3351 kJ. So for one mole of aluminum oxide is 3351/2=1676 kJ.

The numerical value of the Ksp  of \(BaSO_{4}\) is 1.69 * 10^-20.

The Ksp is an equilibrium constant that shows the extent to which a substance is soluble in water. Now consider the fact that \(BaSO_{4}\) is almost insoluble in water.

i) The Ksp of the \(BaSO_{4}\) solution can be obtained from the relation;

Ksp = [\(Ba^{2+}\)] [\(SO_{4}^{2-}\)]

ii) The numerical value of the Ksp is obtained from; [1.30 × 10–10]^2 = 1.69 * 10^-20

iii) The reason for the toxicity of \(BaCO_{3}\) even though it is not more soluble that barium sulfate is that \(BaCO_{3}\) can dissolve in the gastrointestinal tract which is acidic leading to barium poisoning.

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Answer:

Protein

Explanation:

Answer:

1+ it can help create balance among the ecosystem, particularly by controlling invasive species

2+ can help restore native ecosystems on degraded land

1- can become an invasive species

2- can cause an imbalance among native species

Explanation:

Yes, the % recovery will be impacted if you do not wait for the recovered crystals to dry before weighing them. The melting point, however, will not be affected.

When determining the % recovery of a substance, it is important to accurately measure the mass of the recovered product. If the crystals are not allowed to dry completely before weighing, they may still contain traces of moisture, which can add to their mass and lead to an overestimation of the recovery percentage.

Moisture can be absorbed from the surrounding environment, especially if the crystals are hygroscopic (have a tendency to attract and retain moisture).

To obtain an accurate % recovery, it is crucial to ensure that the crystals are completely dry before weighing them. This can be achieved by allowing them to air dry or using techniques such as vacuum drying or desiccation with drying agents.

On the other hand, the melting point of a substance is determined by the temperature at which it changes from a solid to a liquid state. The presence of moisture within the crystals, if not fully dried, may affect the melting point determination due to the vaporization of water at lower temperatures. However, once the crystals are completely dry, their melting point should remain unaffected.

In summary, while the % recovery can be impacted by not waiting for the crystals to dry before weighing, the melting point is not affected as long as the crystals are fully dry during the measurement.

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Answer:

Fewer hydrogen bonds form between alcohol molecules. As a result, less heat is needed for alcohol molecules to break away from solution and enter the air.

Explanation:

Hydrogen bonding is a kind of intermolecular interaction that occurs when hydrogen is bonded to a highly electronegative atom.

Both water and alcohols exhibit hydrogen bonding. However, alcohols exhibit fewer hydrogen bonds than water.

As a result of this, the temperature of evaporation is much higher for water than for alcohol because hydrogen bonds hold water molecules more closely than alcohol molecules are held.

ANSWER

The arrow will be shifted to the right (OPTION B)

EXPLANATION:

Firstly, we need to write out the chemical reaction equation

From the reaction above, you will see that heat is one of the products, this means that the reaction is n exothermic reaction.

An exothermic reaction is a type of reaction in which heat is released to its surroundings.

In an exothermic reaction, a decrease in temperature will shift the equilibrium to the right

Lakes dry up. Shortage of water. Decrease in humidity.

Among the given options, the element that represents X in the transmutation is 49Be (option a).

In the given transmutation, X represents the element that undergoes the nuclear reaction.

Looking at the reaction:

\($X + 2^4He \rightarrow 6^{12}C + 0^1n$\)

We can identify the elements involved in the reaction:

From the given options, the element X can be determined by balancing the atomic and mass numbers on both sides of the reaction.

Comparing the atomic numbers, we have:

X: Z

2⁴ He: 2 (helium)

6¹²C: 6 (carbon)

0¹n: 0 (neutron)

To balance the atomic number on the left side (X + 2^4He), it should equal the atomic number on the right side (6^12C):

Z + 2 = 6

Z = 4

Therefore, the element X has an atomic number of 4, which corresponds to the element beryllium (Be).

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The solution with the greatest boiling-point elevation among the given options is Mg(NO₃)₂.

The boiling-point elevation of a solution depends on the concentration of solute particles. In this case, we have three solutions: Mg(NO₃)₂, NaNO₃, and C₂H₄(OH)₂.

Mg(NO₃)₂ dissociates into three ions: Mg²⁺ and two NO₃⁻ ions. NaNO₃ dissociates into two ions: Na⁺ and NO₃⁻. C₂H₄(OH)₂ does not dissociate, so it remains as one molecule.

Since the boiling-point elevation is directly proportional to the number of solute particles, Mg(NO₃)₂, with three ions per formula unit, will have the greatest boiling-point elevation. NaNO₃ has two ions per formula unit, and C₂H₄(OH)₂ has no ionization, resulting in fewer solute particles and lower boiling-point elevation compared to Mg(NO₃)₂.

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Answer:

Here, I hope this helps

Explanation:

Answer:

       ┃

        V

Explanation:

A polar molecule is a chemical species in which the distribution of electrons between the covalently bonded atoms is not even. Each atom has a certain electro-negativity. When bonded to another atom, the atom with the higher electro-negativity will tend to attract more electrons.

Answer:

the chemical composition of a substance.

Explanation:

Answer:literly same im doing the test. Now and its so hard

Explanation:

Anyone help plz

There is a law called conservation of energy which states that energy can neither be created nor be destroyed. It can be only transferred from one form to another form. Therefore, melting of ice is example of convection type of heat flow.

Energy transfer is a phenomenon in which energy transfer from one matter to another matter. Energy can be transferred in two forms that are by doing work or by transferring heat.

To move any object energy is required so work has to be done by the gas to the piston. Heat can be transferred by three ways conduction, convection and radiation. In conduction, when two object are in direct contact, transfer of molecules takes place. Melting of ice is example of convection type of heat flow.

Therefore, melting of ice is example of convention type of heat flow.

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Answer:

The answer is

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual measurement = 46.37 g

error = 47.25 - 46.37 = 0.88

The percentage error of the measurement is

\(P(\%) = \frac{0.88}{46.37} \times 100 \\ = 1.89777873...\)

We have the final answer as

Hope this helps you

Answer:

The cell theory claims these three components:

1. cell is the smallest functional unit of life: It can be observed under the microscope that cells have various type of molecules and organelles present and have adifferent functional role in the cell which explains that the cell is the smallest unit of life as its molecules or organelles can not carry the life process on their own.

2. All organisms are made up of cells: From bacteria and archaea to human and other life forms are made up of a single cell or organization of cells in a specific pattern it also can be observed by the microscopic of blood or other tissue or cell of an organism.

3. Arise from pre-existing cell: The cells are can be studied under a microscope during cell division where we can observe that new cells come from the pre existing cell by the cell division.

If more nitrogen oxides (NOx) and other pollutants are added to the air, it would likely have a significant impact on the formation of smog. Smog is primarily formed when certain pollutants react in the presence of sunlight.

The two main types of smog are:

Photochemical Smog: This type of smog forms in urban areas with high traffic and industrial emissions. It is characterized by a brownish haze and is primarily composed of nitrogen oxides, volatile organic compounds (VOCs), and sunlight.

When nitrogen oxides and VOCs are released into the atmosphere, they undergo chemical reactions in the presence of sunlight, leading to the formation of ground-level ozone, a key component of photochemical smog.

If more nitrogen oxides and other pollutants are added to the air, the concentration of nitrogen oxides and VOCs would increase. As a result, more of these pollutants would be available for reactions in the presence of sunlight, leading to greater formation of ground-level ozone and exacerbating the formation of photochemical smog.

This would contribute to poor air quality and respiratory issues for individuals exposed to the smog.

Industrial Smog: Industrial smog, also known as sulfur smog, is primarily caused by the combustion of fossil fuels, particularly coal, which releases sulfur dioxide (SO2) into the atmosphere.

If more nitrogen oxides and other pollutants are added to the air, it may not directly affect the formation of industrial smog since it is primarily driven by sulfur dioxide emissions. However, the overall air pollution levels would increase, leading to a deterioration in air quality and potential health effects.

In summary, the addition of more nitrogen oxides and other pollutants to the air would likely intensify the formation of photochemical smog, characterized by increased ground-level ozone concentrations.

It would also contribute to overall air pollution, even though it may not directly impact industrial smog unless it involves the release of sulfur dioxide. Reducing emissions of nitrogen oxides and other pollutants is crucial in mitigating smog formation and improving air quality.

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Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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Both isotopes (A and B) undergo beta decay. The half-life of radioactive element A is 150 days while the half-life of radioactive element B is 12.5 days.

A student obtains samples of pure quantities of two radioactive isotopes: A and B. The samples contain equal numbers of atoms. The person experiences the most exposure to radioactivity by being exposed to isotope B at a distance of one metre for two hours.The amount of radiation a person is exposed to is inversely proportional to the square of the distance from the source.

The closer you are to the source of radiation, the greater the exposure. When the source of radiation is increased from 1 m to 2 m, the amount of radiation is decreased by a factor of 4. When the time of exposure is doubled from 1 hour to 2 hours, the amount of radiation is doubled.If two isotopes of the same number of atoms are considered with half-lives of 12.5 days and 150 days, respectively, the isotope with a half-life of 12.5 days will be more radioactive.

It will have a larger decay constant and emit more beta radiation than the isotope with a longer half-life.Therefore, being exposed to isotope B at a distance of one metre for two hours would result in a person experiencing the most exposure to radioactivity.

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3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\). Fluorine is an atomic number 9 chemical element with both the symbol F.

Fluorine is an atomic number 9 chemical element with both the symbol F. This is the smallest halogen as well as occurs as a very poisonous, pale yellow diatomic vapor under normal circumstances.

It is exceptionally reactive being the most electronegative active catalyst, reacting with all other elements save the light inert.

mole =  410 / 352.02 =1.16mole

number of atom= 1.16× 6.022×10²³=6.98×10²³

number of atom of fluorine =6× 6.98×10²³= 3.6   ×10²⁴ atoms

Therefore, 3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\).

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Answer:

A.All Mixtures Are Made Up Of Solutions

Explanation: