Disiamylborane adds to a triple bond to give an alkenylborane. Upon oxidation with oh–, h2o2, the alkenylborane will form an enol that tautomerizes to an aldehyde. In the first box below, draw the mechanism arrows for the reaction of disiamylborane with the alkyne, and in the last box draw the structure of the aldehyde.

1a)  The net ionic equation for the reaction between aqueous sodium acetate and hydroiodic acid is:$\text{H}^+(\text{aq}) + \text{C}_2\text{H$\text{H}^+(\text{aq}) + \text{C}_2\text{H}_3\text{O}_2^-(\text{aq}) + \text{I}^-(\text{aq}) \rightarrow \text{HC}_2\text{H}_3\text{O}_2(\text{aq})$}_3\text{O}_2^-(\text{aq}) + \text{I}^-(\text{aq}) \rightarrow \text{HC}_2\text{H}_3\text{O}_2(\text{aq}) + \text{Na}^+(\text{aq})$. 1b) Therefore, the net ionic equation for the reaction between aqueous silver(I) nitrate and sodium phosphate is: $\text{Ag}^+(\text{aq}) + \text{PO}_4^{3-}(\text{aq}) \rightarrow \text{Ag}_3\text{PO}_4(\text{s})$.

Aqueous solutions are solutions where the solvent is water. In chemistry, ionic reactions involve the transfer of electrons between ions to form new compounds. The net ionic equation only shows the species that are involved in the reaction and excludes spectator ions, which do not participate in the reaction. To write the net ionic equation, we need to identify the ions that are involved in the reaction. The dissociation of the ionic compounds is as follows:
$\text{NaC}_2\text{H}_3\text{O}_2(\text{aq}) \rightarrow \text{Na}^+(\text{aq}) + \text{C}_2\text{H}_3\text{O}_2^-(\text{aq})$

$\text{HI}(\text{aq}) \rightarrow \text{H}^+(\text{aq}) + \text{I}^-(\text{aq})$

The balanced equation for the reaction between aqueous sodium acetate and hydroiodic acid is:
$ \text{NaC}_2\text{H}_3\text{O}_2(\text{aq}) + \text{HI}(\text{aq}) \rightarrow \text{NaI}(\text{aq}) + \text{HC}_2\text{H}_3\text{O}_2(\text{aq})$

The balanced equation for the reaction between aqueous silver(I) nitrate and sodium phosphate is:
\ce{AgNO3(aq) + Na3PO4(aq) -> Ag3PO4(s) + 3NaNO3(aq)}. To write the net ionic equation, we need to identify the ions that are involved in the reaction. The dissociation of the ionic compounds is as follows:
\ce{AgNO3(aq) -> Ag+(aq) + NO3-(aq)}
\ce{Na3PO4(aq) -> 3Na+(aq) + PO4^3-(aq)}

The net ionic equation is obtained by canceling out the spectator ions, which are the sodium ion (Na+) and the nitrate ion (NO3-): $\text{Ag}^+(\text{aq}) + \text{PO}_4^{3-}(\text{aq}) \rightarrow \text{Ag}_3\text{PO}_4(\text{s})$

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Answer:

pick it up with tongs

Explanation:

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

Polonium > Tellurium > Selenium> Sulfur > Oxygen

Explanation:

In the periodic table, the trend of the atomic radius is; It increases down the group.

The elements when arranged in increasing atomic radius is given as;

Polonium > Tellurium > Selenium> Sulfur > Oxygen

Answer:

It is given that the mass of a man is 75 Kg in earth. Then his mass would be same in moon as mass of anything cannot be changed. The weight of the man in earth can be calculated by W=mg=75×9.8=735 N.

Answer:

2, 4, and 5

Explanation:

have a nice day:)

Answer:

2, 4, and 5

Explanation:

Hope this Helps!!!

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Draw curved arrows (0 the reactants to show the formation of new bonds and the breaking of old bonds in the following situations.

1. Diels -The double-burbed curved arrow used in the Alder reaction t0 represents the movement of a pair of electrons.

2. Disregard Ione pairs and non-bonding electrons.

3. Choose Dram More Erase Rings.

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The most likely pair of atoms to violate the general trend observed for electron affinity when moving from left to right within row 3 of the periodic table is d) Al and P.

The general trend for electron affinity states that as you move from left to right within a period of the periodic table, the electron affinity tends to increase. Electron affinity refers to the energy change when an atom gains an electron to form a negative ion.

However, in the case of option d (Aluminum and Phosphorus), Aluminum (Al) has a higher electron affinity compared to Phosphorus (P).

This violates the general trend because Phosphorus, being further to the right in the periodic table, is expected to have a higher electron affinity than Aluminum. This deviation from the trend can be attributed to factors such as atomic size, effective nuclear charge, and electron configuration, which can influence electron affinity.

So d is correct option.

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Answer:

4+3=3+3+2

Explanation:

4Ni(oh)3+3pb(so4)2=3pb(oh)4+2Ni2(so4)3

Answer:

No

Explanation:

Without photosynthesis, there would be no sugar, without which there could be no cellular respiration.Both animal cells and plant cells depend on cellular respiration for their energy needs, because both animal cells and plant cells need ATP.

The density in grams per milliliter, of the metal is  5.49 g/ml

The mass of a material per unit volume is known as density.. It is often represented by the symbol ρ (rho) and is defined by the equation:

ρ  \(= \frac{m}{V}\), where m represents mass and V represents volume.. Density can also be expressed as a specific gravity (SG), which is a relative measure of density compared to the density of water. The equation for specific gravity is SG = ρ/ρH₂O, where ρH₂O is the density of water.The density of the metal can be calculated using the equation:

Density = \(\frac{Mass }{ Volume}\)

Mass = \(137.6 g\)

Volume = \(260.3 ml - 235.2 ml = 25.1 ml\)

Density = \(\frac{137.6 g }{ 25.1 ml}\)

Density =\(5.49 g/ml\)

Therefore , the density in grams per milliliter, of the metal is \(5.49 g/ml\)

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a)  The volumetric flow rate of air entering the furnace is approximately 20.78 \(m^3/h.\)

b) the rate of heat transfer from the furnace is approximately 15,600 kJ/h.

To solve this problem, we need to apply the principles of stoichiometry and energy balance. Let's break it down step by step:

a.)  To determine the volumetric flow rate of air, we'll use the stoichiometry of the combustion reaction. Methane (\(CH_4\)) burns completely with air according to the following balanced equation:

\(CH_4\)+ 2 ( \(O_2\)+ 3.76 \(N_2\)) -> \(CO_2\)+ 2 \(H_2O\) + 7.52 \(N_2\)

Since we're given that the methane flow rate is 27 m^3/h, we can set up the equation:

27 \(m^3/h.\) \(CH_4\)* (2 + 3.76) = Air flow rate * 7.52

Simplifying, we find:

27 * 5.76 = Air flow rate * 7.52

Air flow rate = (27 * 5.76) / 7.52 ≈ 20.78 m^3/h

Therefore, the volumetric flow rate of air entering the furnace is approximately 20.78 \(m^3/h.\).

b. To determine the rate of heat transfer from the furnace, we'll use the energy balance equation. The energy balance can be expressed as follows:

Q = m_air * Cp_air * (T_exit_air - T_enter_air)

Where:

Q is the rate of heat transfer (in kW),

m_air is the mass flow rate of air (in kg/h),

Cp_air is the specific heat capacity of air (assumed constant at around 1.005 kJ/kg·°C),

T_exit_air is the exit temperature of air (427°C),

T_enter_air is the entering temperature of air (127°C).

To convert the volumetric flow rate of air to mass flow rate, we'll need to consider the density of air at the given conditions. At 127°C and 1 atm, the density of air is approximately 0.941 kg/m^3.

m_air = Air flow rate * Density_air = 20.78 m^3/h * 0.941 kg/m^3 = 19.53 kg/h

Now we can substitute the values into the energy balance equation:

Q = 19.53 kg/h * 1.005 kJ/kg·°C * (427°C - 127°C) = 15,600 kJ/h

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One student found that 25.0cm³of sodium hydroxide solution was neutralized by exactly 22.30cm³ of 0.100mol/dm³sulfuric acid solution then number of moles of sulfuric acid that this student used in the titration is 4.39 mole

Titration is the process in which determining the quantity of substances by adding increment of another substances and sulfuric acid is the highly acidic therefore it is used to cleaning metals and removal of impurities from oil and it is called king of chemicals because of its direct and indirect applications in manufacture of many chemicals including fertilizers

Here given data is

Sodium hydroxide solution = 25.0cm³

Sulfuric acid solution = 22.30cm³ of 0.100mol/dm³

We have to find  number of moles of sulfuric acid that this student used in the titration =?

Number of moles = mass of substances/mass of one mole

Number of moles = 98.079 g/mol/22.30cm³

Number of moles = 4.39 mole

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In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

The answer is B. sodium benzoate

The compound that will readily react with the solution of bromine resulting from the mixture of hydrobromic acid and hydrogen peroxide is option (a) Cyclohexene.

A solution is a specific kind of homogenous mixture made up of two or more components that is used in chemistry. A solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture.

Free bromine (Br2), a potent electrophilic and oxidizing agent, can be produced in situ by mixing hydrobromic acid (HBr) and hydrogen peroxide (H2O2). So, we must choose a substance that Br2 can easily react with in these circumstances.

Cyclohexene, one of the provided compounds, is an unsaturated double-bonded molecule that can go through electrophilic addition processes. With alkenes like cyclohexene, bromine easily engages in an electrophilic addition process to generate a dibromoalkane.

Hence, option (a) cyclohexene is the substance that will most rapidly react with the bromine solution produced by the mixture of hydrobromic acid and hydrogen peroxide.

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geothermal energy, form of energy conversion in which heat energy from within Earth is captured and harnessed for cooking, bathing, space heating, electrical power generation, and other uses.

Answer:

it can use for you wanted to do and we can use it for our wants...

Explanation:

⠀⠀◣ ◢

⠀⠀█ █

⠀⠀█ █

⠀⠀◤ ◥

BTS

Answer:

A.

Explanation:

In the case of a seesaw, the object at the top is the effort and the object at the bottom is the load.

Answer:

kilogram (kg)

Explanation:

Answer:

im too stoned for this

Explanation:

sorry man

Answer:

KBr

Explanation

KBr is an ionic compound which have very high BP since they exist as 3D crystals

Methyl Bromide, CH3Br.  is a covalent compound which have low BP since they exist as individual molecules

Answer:

\(P_T = 1627\text{ mm Hg}\)

Explanation:

Dalton's law of partial pressures states that the total pressure in a mixture of gases is the sum of the partial pressures of the individual gases.

In other word:
\(\displaystyle P_T = P_A + P_B + P_C\)

Therefore, the total pressure of the mixture of three gases is:
\(\displaystyle \begin{aligned} P_T & = (445 \text{ mm Hg}) + (560\text{ mm Hg}) + (622\text{ mm Hg}) \\ \\ & = 1627 \text{ mm Hg}\end{aligned}\)

In conclusion, the total pressure of the mixture is 1627 mm Hg.

The book's initial velocity before it touches to floor is 14.2 m/s.

The velocity of an object, which is function of time, is the rate at which its location with respect to a frame for reference changes. Similar to velocity, an item's speed and line of action (such as 60 km/h toward the north) are measured.

the book's height above the ground, h = 1.5 m

the book's rate of movement, t = 3 seconds

The following formula is used to determine the book's starting velocity:

h = ut + ¹/₂gt²

where;

The book's velocity is u.

1.5 = 3u + (0.5 x 9.8 x 3²)

1.5 = 3u + 44.1

3u = 1.5 - 44.1

3u = -42.6

\(u= \frac{-42.6}{3}\)

u = -14.2 m/s

u = 14.2 m/s downwards

Therefore, the book's initial velocity before it touches to ground equals 14.2 m/s.

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Answer:

64.2

Explanation:

2.8+17.8+13.7+8+21.9 = 64.2

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Vaccination involves deliberate stimulation of the immune system to induce protective immunity against a specific disease-causing pathogen without causing the actual disease.

The correct answer is c. Vaccination. Vaccination is a process that involves administering a vaccine, which contains either weakened or inactivated forms of the disease-causing pathogen or specific parts of it (such as proteins or sugars), to an individual. The purpose of vaccination is to mimic the infection caused by the pathogen without actually causing the disease. This deliberate stimulation of the immune system triggers an immune response, leading to the production of antibodies and the development of immunological memory.

By introducing the pathogen or its components in a controlled manner, vaccination allows the immune system to recognize and remember the pathogen. If the vaccinated individual encounters the actual pathogen in the future, their immune system can mount a rapid and effective response to eliminate the pathogen and prevent the development of the associated disease. Vaccination has been a highly successful and widely used strategy to prevent the spread of infectious diseases and protect individuals and populations from various pathogens.

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To design an electrolytic cell using the given half-reactions, we need to connect the two half-cells through a wire and allow the flow of electrons from the more negative E° value (-0.25 V) to the more positive E° value (-1.57 V).

In this case, Ni2+ will plate out (form a solid) at the cathode because it has a more negative E° value (-0.25 V) compared to Ba2+ (-1.57 V). This means that Ni2+ ions will accept electrons from the cathode and get reduced to Ni metal.

At the anode, Ba will be oxidized to Ba2+ ions as it has a more positive E° value (-1.57 V) compared to Ni2+ (-0.25 V). This means that Ba atoms will lose electrons and form Ba2+ ions, which will then move towards the cathode to get reduced to Ba metal. However, since Ni2+ is more likely to accept electrons at the cathode, Ba will not plate out as a solid.
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The overall change in the oxidation number of sulfur for this reaction is 6.

Tube worms that survive near the geothermal vents of hydrogen sulfide rely on bacteria living inside them and obtain the energy by the oxidation of \(H_{2} S\) to \(SO_{4} ^{2-}\). The oxidation reaction of \(H_{2} S\) to \(SO_{4} ^{2-}\) taking place near the geothermal vents of hydrogen sulfide is mentioned below;

\(H_{2} S + 2O_{2}\) → \(SO_{4} ^{2-} + 2H^{+} + 8e^{-}\)

Oxidation number of Sulphur in reactant i.e., \(H_{2} S\)  = -2

Oxidation number of Sulphur in product i.e., \(SO_{4} ^{2-}\)  will be solved as mentioned below;

x - 8 = -2

x = 6

Oxidation number of Sulphur in product i.e., \(SO_{4} ^{2-}\) = 6

Change in the oxidation number of sulfur in this reaction = Oxidation number of Sulphur in product - Oxidation number of Sulphur in reactant = 6 - (-2) = 8

Thus,  we can conclude that overall change in the oxidation number of sulfur is 6 in this reaction.

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Some people practice brining their turkey. This means they let it soak in a solution overnight. The solution diffuses into the turkey. This means that the turkey is placed into a hypertonic solution.

A hypotonic solution is described as a solution that has lower osmotic pressure than another solution to which it is compared.

The concept of tonicity helps us understand that the saltwater we use to brine the turkey is typically considered hypertonic solution because it has a greater concentration of solutes than the liquid found inside the cells.

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Answer:

uhhh well ig btw what plant

Explanation:

it would be more sunlight to