Determine the name for Br2O A. bromine (i) oxide B. bromine oxide C. dibromine monoxide D. bromate E. bromine (ii) oxide

Answer: here, for those of you who can't see it upright

Explanation:

Each element have its own electronic configuration.The first given configuration is with 4 electrons represents beryllium (Be) and the second one with 9 electrons is Fluorine (F) and the last one with 11 electrons is sodium (Na).

An orbital is a circular path with fixed energy through which electrons in an atom revolving around the nucleus. Electrons are filled in these orbitals based on the energy levels.

Lowest energy orbitals are filled first and the higher energy orbitals are filled last. Each orbital has a specific capacity to accommodate electrons. S orbital fill only two electrons, p orbital fill 6 electrons d orbital 10 electrons and f orbital fills 14 electrons.

The first electronic configuration have a total 4 electrons thus the element with atomic number 4 is Beryllium (Be) and the second configuration have 9 electrons thus it is Fluorine (F).

The last configuration represented as slashes have a total of 11 electrons. The element with 11 electrons is sodium (Na).

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The ionization energy, or ionization potential, is the energy required to completely remove an electron from a gaseous atom or ion. The closer and more tightly bound an electron is to the nucleus, the more difficult it will be to remove, and the higher its ionization energy will be.

Answer:

Friction is the force between an object in motion and the surface on which it moves. Friction is the external force that acts on objects and causes them to slow down when no other external force acts upon them.

The molar mass of the gas, given that 3.25 g of the gas occupied 2.56 L is 30.66g/mol

To obtain the molar mass of the gas, we shall first obtain the number of mole of the gas. This can be obtained as follow:

PV = nRT

0.95 × 2.56 = n × 0.0821 × 280

Divide both sides by (0.0821 × 280)

n = (0.95 × 2.56) / (0.0821 × 280)

n = 0.106 mole

Haven obtain the mole of the gas, we shall determine the molar mass of the gas as follow:

Molar mass = mass / mole

Molar mass of gas = 3.25 / 0.106

Molar mass of gas = 30.66g/mol

Thus, the molar mass of the gas is 30.66g/mol

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Answer:

Actual yield and theoretical yield

The activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.

To find the activation energy (Ea) of the reaction, we can use the Arrhenius equation, which relates the rate constant (k) to the temperature (T) and activation energy. The Arrhenius equation is given by:

k = A * e^(-Ea/RT)

Where:

k is the rate constant

A is the pre-exponential factor (frequency factor)

Ea is the activation energy

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

T is the temperature in Kelvin

We have two sets of data:

At 600 K, k1 = 3.4 m^(-1)s^(-1)

At 750 K, k2 = 31.0 m^(-1)s^(-1)

Taking the natural logarithm (ln) of both sides of the Arrhenius equation, we can rearrange the equation to solve for the activation energy:

ln(k) = ln(A) - (Ea/RT)

We can create two equations using the given data:

ln(k1) = ln(A) - (Ea/(R * 600))

ln(k2) = ln(A) - (Ea/(R * 750))

Subtracting the second equation from the first eliminates the ln(A) term:

ln(k1) - ln(k2) = (Ea/R) * ((1/600) - (1/750))

Simplifying further:

ln(k1/k2) = (Ea/R) * ((750 - 600) / (600 * 750))

Now we can solve for Ea:

Ea = (R * (ln(k1/k2))) / ((750 - 600) / (600 * 750))

Using the given values and the appropriate units:

Ea = (8.314 J/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))

Converting the units from J to kJ:

Ea = (8.314 × 10^(-3) kJ/(mol·K) * ln(3.4/31.0)) / ((750 - 600) / (600 * 750))

Ea ≈ 71.46 kJ/mol

Therefore, the activation energy of the reaction is approximately 71.46 kJ/mol, rounded to 2 decimal places.

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Among the given polymers, polycarbonate would be suitable for the fabrication of cups to contain hot coffee.

Polycarbonate is a thermoplastic polymer known for its excellent heat resistance and durability. It has a high glass transition temperature and can withstand high temperatures without melting or deforming. This makes it suitable for holding hot beverages such as coffee without compromising its structural integrity.On the other hand, polyethylene, polypropylene, poly(vinyl chloride) (PVC), and PET polyester have lower heat resistance compared to polycarbonate. These polymers may soften or deform at higher temperatures, which can be a concern when handling hot liquids like coffee.Therefore, polycarbonate stands out as a suitable choice due to its superior heat resistance, making it well-suited for the fabrication of cups to contain hot coffee.

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The expression to be rearranged K = [CO][Cl₂] [COCI₂]  are x = 0.327 or x = 339.

The expression to be rearranged K = [CO][Cl₂] [COCI₂] is:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²

We will expand and simplify the expression:

(0.156 - x) (0.156 - x) (0.263 + x) = 5.00 × 10⁻²(0.156)² + (0.156)(x) - (x)(0.156) - (x)² (0.263 + x)

= 5.00 × 10⁻²(0.156)² - (0.263)(0.156)(x) - (0.156)(x) + (0.263)(0.156)(x) + x²(0.263 + x) - 5.00 × 10⁻² = 0

After simplifying:

-0.0132302 x² - 0.001002 x + 0.0014256 = 0

This is in the form ax² + bx + c = 0 where a = -0.0132302, b = -0.001002 and c = 0.0014256

Using the quadratic formula, we have:

\(\[x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}\]\)

Substituting values, we get:

\(\[x = \frac{-(-0.001002) \pm \sqrt{(-0.001002)^2-4(-0.0132302)(0.0014256)}}{2(-0.0132302)}\]\)

Solving, we get:x = 0.327 or 3.39 × 10²

Therefore, the solutions are x = 0.327 or x = 339.

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The mass of water produced if the percent yield of the reaction is 72% is 16.2g.

Mass of acetylene = 40.0 grams

Mass of oxygen = 40.0 grams

Percent yield of the reaction = 72%

The balanced chemical equation is : 2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)

From the balanced chemical equation, it is clear that 2 moles of acetylene reacts with 5 moles of oxygen to form 2 moles of water.

To find out limiting reagent

Moles of acetylene = Given mass of acetylene / molar mass of acetylene

                                 = 40.0 g / 26 g/mol = 1.54 moles

Moles of oxygen = Given mass of oxygen / molar mass of oxygen

                                = 40.0 g / 32 g/mol = 1.25 moles

The limiting reactant is oxygen because its number of moles is less than acetylene. Oxygen will react with 1.25 moles of acetylene present and form CO2 and H2O.

According to the balanced equation, the stoichiometric ratio of C2H2 to H2O is 2:2, meaning that for every 2 moles of C2H2, 2 moles of H2O are produced.

Since the stoichiometry is 1:1, the moles of water produced will be the same as the moles of acetylene used.

The number of moles of H2O produced 1.25 moles.

The mass of H2O produced = Number of moles of H2O × Molar mass of H2O

Mass of H2O produced = 1.25 × 18 = 22.5 g

Given percent yield = 72%

The actual yield can be calculated as follows;

Percent yield = Actual yield / Theoretical yield × 100

72% = Actual yield / 22.5 g × 100

Actual yield = 22.5 g× 72 / 100 =16.2 g

Thus, the mass of water produced if the percent yield of the reaction is 72% is 16.2g.

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C) As the intensity of a photon increases, the ability of that photon to eject an electron does not change. The relationship between the intensity of photons and the ejection of an electron can be explained by the photoelectric effect.

The photoelectric effect is the phenomenon in which electrons are ejected from a material when light is shone on it. According to the classical wave theory of light, the intensity of light is related to its amplitude, or the height of its wave. Therefore, one might expect that increasing the intensity of light would increase the energy of the electrons ejected from the material. However, the photoelectric effect could not be explained by the classical wave theory of light.
In 1905, Albert Einstein proposed that light had both wave-like and particle-like properties. According to his theory of the photoelectric effect, light was made up of particles called photons. Each photon had a certain amount of energy that was proportional to its frequency. When a photon was absorbed by a material, its energy was transferred to an electron in the material. If the energy of the photon was greater than the binding energy holding the electron to the material, the electron would be ejected from the material.

The answer to the multiple-choice question is A) As the intensity of a photon increases, the ability of that photon to eject an electron increases. This is because increasing the intensity of light increases the number of photons, and therefore the number of opportunities for a photon to transfer its energy to an electron. However, it is important to note that increasing the intensity of light does not increase the energy of individual photons, but rather the number of photons present.

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Answer:

D

Explanation:

Its a trick question, youre washing your dishes by hand which means there IS NO rack :D

The statement among the available options that describes the result of the study is that less than 50% of the people never felt phantom pain. Option 2.

In order to interpret the data and find the best description of the outcome of the experiment, the response needs to be grouped into 2 from the 3 available responses.

Since those that phantom pain sometimes and always belong to the same category, the respondents can be summed up into one:

Number of those that sometimes feel phantom pain = 534

Number of those that always feel phantom pain = 193

Total number of people that feel phantom pain = 534 + 193

                                                                                = 727 people

Number of people that never feel phantom pain = 183

Total number of respondents in the experiment = 183 + 534 + 193

                                                                                = 910 people

Percentage of respondents that felt phantom pain = 727/910 x 100

                                                                                     = 79.89%

Percentage of people that never felt phantom pain = 183/910 x 100

                                                                                      = 20.11%

Percentage of people that felt phantom pain all the time = 193/910 x 100

                                                                                      = 21.21%

Thus, the statement that correctly describes the outcome of the experiment of all the statements is that less than 50% never felt phantom pain.

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The new freezing temperature of the ice will be -6.59°C.

Adding solutes such as MgCl2 to a solvent such as water lowers the freezing point of the solvent. This occurs because the solute particles disrupt the crystal lattice structure of the solvent, making it more difficult for the solvent molecules to form solid ice.

The degree to which the freezing point is lowered depends on the concentration of the solution.

The freezing point depression phenomenon has numerous practical applications in everyday life and in industry. For example, adding salt to icy roads lowers the freezing point of water, causing the ice to melt and improving traction for vehicles.

In the food industry, freezing point depression is used to preserve foods by lowering the freezing point of water in the food, preventing the formation of ice crystals that can damage the food's texture and structure.

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The ice will now be at a freezing point of -6.59°C.

The freezing point of a fluid, like water, is lowered by the addition of solutes like MgCl2. This happens because the solute particles alter the solvent's crystal lattice structure, which makes it harder for the solvent molecules to condense into solid ice.

The concentration of the solution determines how much the freezing point is reduced.

Numerous real-world applications of the freezing point depression phenomenon can be found in both industry and daily living. For instance, adding salt to icy roads causes the freezing point of water to decrease, melting the ice and enhancing car traction.

By lowering the freezing point of the water in food, freezing point depression is used in the food business to preserve food, avoiding the formation of ice crystals that could harm the food's texture and structure.

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They attract each other to form ionic networks.

The mass of reacted magnesium chloride is 23.75g, percent by mass of solution magnesium chloride is 90.9%.

Relation between the mass and moles of any substance will be represented as:

n = W/M, where

Moles of MgCl₂ = 200g / 95g/mol = 2.1mol

Moles of NaOH = 20g / 0.5mol

Given chemical reaction is:

MgCl₂ + 2NaOH → 2NaCl + Mg(OH)₂

From the stoichiometry of the reaction it is clear that

Mass of reacted MgCl₂ = (0.25mol)(95g/mol) = 23.75g

Percent by mass of MgCl₂ in the given solution mixture will be calculated as:

In the above reaction we obtain NaCl as a solid, and MgCl₂ is the limiting reagent in it, from which 2 moles of NaCl is produced means

Mass of NaCl = (0.5mol)(58.5g/mol) = 29.25g

Hence, mass of reacted MgCl₂ is 23.75g, percent by mass of solution magnesium chloride is 90.9% and mass of the obtained solid is 29.25g.

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To rank the following amines in order of decreasing base strength: NH₃ > (CH₃)₂NH > CH₃NH₂ > NH₂Br.

The order of base strength is determined by the availability of the lone pair of electrons on the nitrogen atom, which can be donated to form a bond with a proton (H⁺).

NH3 has the highest base strength because it has the most electron-donating groups (three hydrogens) attached to the nitrogen atom, making the lone pair of electrons more available.

(CH₃)₂NH is the next strongest base because it also has two electron-donating methyl groups attached to the nitrogen atom.

CH₃NH₂ has only one electron-donating methyl group, so it is weaker than (CH₃)₂NH.

NH₂Br is the weakest base because the electronegative bromine atom withdraws electron density from the nitrogen atom, making the lone pair of electrons less available.

Therefore, the correct ranking from strongest to weakest base is:

NH₃ > (CH₃)₂NH > CH₃NH₂ > NH₂Br.

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Answer:

M = molar concentration

n = moles of solute

v = liters of solution

Explanation:

Answer:

Explanation:

1=i

4=d

5=m

6=c

8=o

9=j

10=a

13=b

14=h

15=l

Theses are the ones i knew

Answer:

Transparent means you can see through the object. An example is glass.

Opaque means you cannot see through the object. An example is wood.

Explanation:

A solution that contains 7.8% W/V ethanol is equivalent to 0.078g/mL. Details about weights per volume can be found below.

Weights per volume is a unit for measuring density of a substance. It can be converted to g/mL using the following expression:

w/v% = g/100mL

According to this question, a solution contains 7.8% W/V ethanol. The equivalent of this in g/mL is as follows:

7.8% W/V = 7.8g/100mL

= 0.078g/mL

Therefore, a solution that contains 7.8% W/V ethanol is equivalent to 0.078g/mL.

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Doubling the concentration of the reactant (RX) in an E1 reaction will lead to the rate being doubled. So, the correct answer is a) rate doubled.

In an E1 reaction, the rate depends on the concentration of the substrate (RX), and when you increase the concentration, the rate will increase proportionally. When a reactant (R) undergoes ionization to yield a carbocation intermediate (R+), an E1 reaction occurs. For example, the rate of an E1 reaction is affected by the doubling of [RXI] in the following ways:  the rate is doubled.

The rate of the E1 reaction depends only on the formation of a carbocation intermediate and is unaffected by the nucleophile or its concentration. When the concentration of the alkyl halide is increased, the rate of the E1 reaction is found to increase. Thus, in the case of the E1 reaction, the rate of reaction is directly proportional to the concentration of the alkyl halide.

Therefore, the rate of an E1 reaction is directly proportional to the concentration of the alkyl halide. If the concentration of the alkyl halide is doubled, the rate of the E1 reaction will double. Therefore, the correct answer is (a) rate doubled.

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Answer:

Microscopes allowed scientists to observe Prokaryotic cells which make up Bacteria and Archaea.

Examples of herbivores are buffalo, elk, some bird species, mice, squirrels, rabbits, and many more.

To solve this, we must know each and every concept behind herbivores and  carnivores. Therefore, herbivores include cows, goats, giraffes, sheep, and zebras etc.

Herbivores, often known as herbivorous animals, are creatures that eat plants, leaves, fruits, and other plant-based foods for nourishment. They are classified as primary eaters and are found at levels 2 or above in the food supply chain.

Herbivores include cows, goats, giraffes, sheep, and zebras. Interestingly, there really are herbivores who specialize in eating on specific parts of the plant; for example, frugivores are herbivores that graze on fruits, whereas folivores are herbivore that eat on leaves.

Therefore, herbivores include cows, goats, giraffes, sheep, and zebras etc.

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Answer:

the dividend yield is 4%

Explanation:

The computation of the dividend yield is as follows:

Dividend yield = Dividend per share ÷ current share price per share

= ($0.20 × 4 quarters) ÷ $20

= $0.80 ÷ $0.20

= 4%

hence, the dividend yield is 4%

The same is determined by applying the above formula

We have a total of 9.27 moles of the molecule that weights 134.1 g/mol.

The molecular mass of the molecule is 134.7 g/mol.

The amount of the molecule that we have is 1.25kg.

We know,

1 kilogram = 1000 grams.

1.25 kilograms = 1250 grams.

The mass of the amount of molecule we have is 1250 grams.

The moles of a molecule are given by,

Moles = Mass that we have/molecular mass

Putting the values accordingly,

Moles = 1250/134.7

Moles = 9.27 moles.

So, we have 9.27 moles of that molecule whose molecular mass is 134.1 g/mol.

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Answer: simple and complex.

Explanation:These are also called simple sugars. They're found in refined sugars, like the white sugar you see in a sugar bowl. If you have a lollipop, you're eating simple carbs.

The incorrect statement in this case is statement i. A solution cannot be a gas. A gas is not a solution on its own, but it can be a component in a mixture or a solution.

A mixture is a combination of two or more substances that are not chemically combined and can exist in any state - solid, liquid, or gas. A solution, on the other hand, is a homogeneous mixture where one substance (the solute) is dissolved in another substance (the solvent). The solute can be a solid, liquid, or gas, but the solvent must be a liquid.
Statement ii is correct. A solution can be homogeneous or heterogeneous. A homogeneous solution has uniform composition throughout, meaning that the solute is evenly distributed in the solvent. In contrast, a heterogeneous solution has non-uniform composition, meaning that the solute is not evenly distributed in the solvent.
Statement iii is also correct. A solution is a homogeneous mixture. This means that the solute is evenly distributed in the solvent to create a uniform composition. A homogeneous mixture has the same properties and composition throughout, and the components cannot be visibly distinguished from each other.

In summary, a solution cannot be a gas, but it can be a homogeneous mixture of a solid, liquid, or gas dissolved in a liquid solvent. A mixture can exist in any state and can be homogeneous or heterogeneous, while a solution is always a homogeneous mixture.

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