Propose the synthesis of 2-benzyl butanoic acid using acetoacetic ester

Answer:

0.00823 L and 0.000647 L

Explanation:

Use standard metric conversions

1 cL = 0.01 Liters

1 mL = 0.001 Liters

Answer: The new molarity is 2.4 M

Explanation:

According to the dilution law,

\(C_1V_1=C_2V_2\)

where,

\(C_1\) = concentration of pure solution = 3 M

\(V_1\) = volume of pure solution = 200 ml

\(C_2\) = concentration of diluted solution= ?

\(V_2\) = volume of diluted solution= 250 ml

Putting in the values:

\(3M\times 200ml=M_2\times 250ml\)

\(M_2=2.4M\)

Thus the new molarity is 2.4 M

The strand 1 of hydrocarbons is used to produce plastic, hence option D is correct.

Raw resources like natural gas, oil, or plants that have been processed into ethane and propane are used to make plastics. The subsequent "cracking" procedure uses heat to transform ethane and propane into ethylene and propylene. To produce various polymers, these components are mixed.

Propylene is a substance found in large quantities in petroleum. In order to speed up chemical processes, refiners combine heated propylene with a catalyst to create plastic. Propylene molecules start to cluster together like beads on a thread as a result.

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Answer:

Bothersome pollutants are pollutants that persist in water.

Explanation:

Bothersome pollutants are those pollutants that have deleterious effects on human health which are consistently lodged into water bodies. Bothersome pollutants include petroleum products, heavy metals, and toxic chemicals etc.

Many of these bothersome pollutants are non biodegradable. They accumulate at the bottom of the ocean thereby causing problems for aquatic organisms and disrupting the aquatic ecosystems in the ocean.

These bothersome pollutants are not soluble in water hence we can not just destroy them by dissolving them in water. They persist in the aquatic ecosystem and can even migrate from place to place thereby spreading pollution.

Answer:

The type of plate boundary between the South American Plate and the African Plate is a divergent one.

The two plates move apart from each other.

Explanation:

The boundary between the South American Plate and the African Plate is a divergent boundary. The plates moved, and between them, there is an oceanic basin. The plates move on top of the mantle, and magma goes up the divergent areas creating new surfaces when it solidifies. The new surface is called a ridge.

Answer:

Sodium Hydroxide

Explanation:

NaOH is Sodium Hydroxide

Answer:

X = 10

Explanation:

First, we need to calculate the moles of Na₂CO₃ in  the 0.948g. Then, the moles of water based on the difference of masses. X will be the ratio of moles of water and moles of sodium carbonate.

Moles Na₂CO₃ (Molar mass: 105.99g/mol):

0.948g * (1mol / 105.99g) = 8.944x10⁻³ moles

Moles H₂O (Molar mass: 18.02g/mol):

2.558g - 0.948g = 1.61g of water

1.61g * (1mol / 18.02g) =0.08935 moles

The ratio, X, is:

0.08935mol / 8.944x10⁻³ moles

If a strong base is added to a buffer the pH will change only slightly. In the non-buffered solution changing the pH significantly.

If a strong base is added to a buffer, the weak acid will give up its H+ in order to transform the base (OH-) into water (H2O) and the conjugate base: HA + OH- → A- + H2O. Since the added OH- is consumed by this reaction, the pH will change only slightly.

In the non-buffered solution, the added hydronium or hydroxide ions have nothing to react with so the concentrations increase rapidly, changing the pH significantly.  If a base is added to an acidic solution, the solution becomes less acidic and moves toward the middle of the pH scale.

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Both changing particle size and adding a catalyst can influence the reaction rate, while adding heat specifically affects the rate by increasing the kinetic energy of the reactant particles.

The correct option are A and C.

Both changing particle size and adding a catalyst can alter the reaction rate.

Changing particle size can affect the reaction rate because it influences the surface area available for the reactant particles to interact. Smaller particle sizes result in a larger surface area, increasing the frequency of collisions between particles and accelerating the reaction. Conversely, larger particle sizes reduce the surface area, leading to fewer collision events and slower reaction rates.

Adding heat can also alter the reaction rate. Increasing the temperature provides more thermal energy to the reactant particles, causing them to move faster and collide with greater energy. This enhanced kinetic energy leads to more successful collisions and an increased reaction rate.

Adding a catalyst can significantly affect the reaction rate. A catalyst provides an alternative reaction pathway with lower activation energy, enabling the reaction to occur more easily. By lowering the energy barrier, a catalyst increases the rate of reaction without being consumed or permanently altered in the process.

The correct option are A and C.

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The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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The ∆H of solution of NaOH is 46.8 kJ/mol.

First, we need to calculate the amount of heat absorbed by the solution:

q = m × c × ∆T

where q is the heat absorbed (in Joules), m is the mass of the solution (in grams), c is the specific heat capacity of the solution (in J/(g °C)), and ∆T is the change in temperature (in °C).

In this case, the mass of the solution is the sum of the mass of NaOH and the mass of water:

m = 7.59 g + 80.0 g = 87.59 g

The change in temperature is:

∆T = 48.0 °C - 25.0 °C = 23.0 °C

Substituting the values, we get:

q = 87.59 g × 4.184 J/(g °C) × 23.0 °C = 8,878 J

Next, we need to convert the heat absorbed into the enthalpy change of solution (∆H). The enthalpy change of solution is the heat absorbed per mole of solute. The number of moles of NaOH is:

n = m/M

where M is the molar mass of NaOH, which is 40.00 g/mol.

n = 7.59 g / 40.00 g/mol = 0.1898 mol

Therefore, the enthalpy change of solution is:

∆H = q/n = 8,878 J / 0.1898 mol = 46,780 J/mol = 46.78 kJ/mol

The H of a NaOH solution, rounded to three significant numbers, is 46.8 kJ/mol.

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Answer:

\(\Delta _fS=35.68\frac{J}{K}\)

Explanation:

Hello,

In this case, the entropy of fusion is computed in terms of the enthalpy of fusion considering the fusion temperature in kelvins:

\(\Delta _fS=\frac{\Delta _fH}{T}\)

Thus, since the enthalpy of fusion is given in kJ/kg we must compute the grams of benzene in mole of benzene via its molar mass:

\(m=1mol*\frac{78.0g}{1mol}=78g\)

Next:

\(\Delta _fH=78g*\frac{127.4J}{g}=9937.2J\)

Finally, the entropy:

\(\Delta _fS=\frac{9937.2J}{(5.5+273)K}\\\\\Delta _fS=35.68\frac{J}{K}\)

Best regards.

Answer:

3.0 M

Explanation:

The molarity formula is M = n/v

where M is the molarity, n is the number of moles, and v is the volume in litres.

step 1: convert the grams of KNo3 to moles. To convert grams to moles, divide by the molar mass.

(30 g divided by 101.103 g/mol) = 0.296 moles

step 2: convert the volumes to Litres. 100 mL is 0.1 L

step 3: apply the formula. Molarity = (0.296 mol / 0.1 L) = 2.96 mol/L

We will round our answer to 3.0 M

This technique has been used to identify the presence of gases such as oxygen, methane, and carbon dioxide in the atmospheres of exoplanets.  

i) To estimate the frequency of the violet (leftmost) emission, we can use the equation v = c/λ, where v is frequency, c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength of the emission in meters. The wavelength of the violet emission is 400 nm or 400 x 10^-9 m, so the frequency can be calculated as v = (3.00 x 10^8 m/s) / (400 x 10^-9 m) = 7.50 x 10^14 Hz.

ii) To estimate the energy of the violet emission, we can use the equation E = hv, where E is energy, h is Planck's constant (6.63 x 10^-34 Js), and v is frequency in Hz. Substituting the frequency calculated in part (i), we get E = (6.63 x 10^-34 Js) x (7.50 x 10^14 Hz) = 4.97 x 10^-19 J.

b. The spectral lines are produced by the electrons within the atoms of this element, which can absorb or emit specific amounts of energy to move between different energy levels. These energy transitions result in the emission or absorption of photons with specific wavelengths and frequencies, giving rise to the observed emission spectrum.

c. The violet emission line represents the photon with the most energy since it has the shortest wavelength (400 nm) and highest frequency (7.50 x 10^14 Hz) among the lines shown. This highest energy does not necessarily represent the energy of the valence electrons, but rather corresponds to the specific energy transitions occurring within the atoms of the element.

d. Emission spectra can be used to determine the gases present in the atmosphere of a far-away planet by analyzing the specific wavelengths of the emitted or absorbed light from the planet. Each gas has a unique emission or absorption spectrum, allowing scientists to identify the gases present in the planet's atmosphere.

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Suppose you have a material in it's liquid phase. As you give energy to that liquid, the temperature of the liquid will increase gradually, and the relation between the increase of temperature and the given energy is the specific heat.

Now, there is a point, a critical point, where the temperature stops to increase, which means that we are near a change of phase. So from this point on, the energy is not used to increase the kinetic energy of the particles (which would increase the temperature), the energy is used to break the bonds and allow a change of phase, for example, from liquid to gas.

So, we know that if you have a mol of water at 100°C, then you need to add 40.7 kJ of energy to change the phase of the water from liquid to gas phase.

This means that if you have a mol of water and you give that exact energy, the temperature will not change, instead, you now will have a mol of water at the temperature of 100°C.

Similarly with the case at 25°C (which happens for a particular pressure only)

So the heat of vaporization can not really be related to increases in temperature as you thought.

For changes in temperature, you need to use the specific heat.

We know that for water it is:

c = 4.184 J/g*°C = 76.15 J/mol*°C

So, if you want to increase the temperature from 25° to 100°

This means an increase of 75°C of one mol of water.

We just need to multiply the above number by:

1mol*(75°C)

Energy needed = (76.15 J/mol*°C)*1mol*(75°C) = 5,711.25 J

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Answer:

meth

Explanation:

YOu get chemicals and mix them together yes you do

The correct mass-volume relationship at STP is A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)

To determine the correct mass-volume relationship at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation, the molar masses of the substances involved, and the molar volume of gases at STP.

The balanced equation indicates that 2 moles of \(H_{2}\) react with 1 mole of \(O_{2}\) to produce 2 moles of \(H_{2}O\). At STP, 1 mole of any gas occupies 22.4 liters.

In option A, it states that 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). The molar mass of \(O_{2}\) is 32.00 g/mol, which corresponds to 1 mole of \(O_{2}\). According to the balanced equation, 1 mole of \(O_{2}\) reacts to form 2 moles of \(H_{2}O\). Therefore, the given mass of \(O_{2}\) (32.00 g) corresponds to 1 mole of \(O_{2}\), which will produce 2 moles of \(H_{2}O\).

Since 1 mole of any gas occupies 22.4 L at STP, 2 moles of \(H_{2}O\) would occupy (2 × 22.4) L, which is equal to 44.8 L. Hence, the correct answer is A, where 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). This choice represents the correct mass-volume relationship at STP based on the given equation and stoichiometry. Therefore, Option A is correct.

The question was incomplete. find the full content below:

Consider the equation. 2\(H_{2}\)(g) + \(O_{2}\)(g) >>>> 2\(H_{2}O\)(g)

Which represents the correct mass-volume relationship at STP?

A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)B. 2.00 g of \(H_{2}\) react with an excess of \(O_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\).

C. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce 22.4 L of \(H_{2}O\)

D. (2 ´ 2.00) g of \(H_{2}\) react with an excess of \(O_{2}\) to produce 22.4 L of \(H_{2}O\).

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Answer:

K= ( [h2]² [O2] )/[H2O]²

Explanation:

characters arent in my keyboard

Answer:

All the locations can suffer earthquakes and a handful like tokyo tsunami so the question is either or so the anwer would be all

Explanation:

Answer:

c. Efflorescent

Explanation:

Some hydrated salts, when exposed to the atmosphere, give off part of all of their water of crystallization spontaneously to form a lower dehydrated or anhydrous salt. Such salts are known as efflorescent and the phenomenon is called Efflorescence.

Efflorescence occurs when the hydrate's aqueous vapor pressure is greater than the water vapor's partial pressure in the air. For example, because the vapor pressures of washing soda (Na2CO3·10H2O) and Glauber's salt (Na2SO4·10H2O) normally exceed that of the water vapor in the atmosphere, these salts effloresce (i.e., lose all or part of their water of hydration), and their surfaces assume a powdery appearance.

Answer:

The ratio of [A⁻] / [HA] is 100

Explanation:

The structure of the formic acid (Weak acid), is in the picture.

Using H-H equation, we can determine the ratio of [A⁻] / [HA] for a weak acid as Formic Acid:

pH = pKa + log₁₀ [A⁻] / [HA]

Where A⁻ is the conjugate base of the weak acid, HA.

Solving for formic acid at pH = 5.75:

5.75 = 3.75 + log₁₀ [A⁻] / [HA]

2 = log₁₀ [A⁻] / [HA]

10^2 = [A⁻] / [HA]

The concentration of the HCl (aq) solution was at least 1.0 M.

The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration

P = 0.095atm(corresponds to 0.20g of CaCO3

so,moles of CaCO3 =0.20g/100gmol⁻¹=0.002moles

moles of HCl =(molesₓCaCO3ₓ2)=0.002ₓ2

M=0.004/4ₓ100

Concentration of HCl=1M

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Answer:

e = Mc hammer.

Explanation:

The boiling point of 1-pentanol (C5H11OH) is estimated to be around 138-140°C.

The alcohol molecules' intermolecular hydrogen bonds, which strengthen the forces keeping the molecules in a liquid state, are to blame for this.

The kinetic energy needed to rupture the intermolecular bonds and change the state of the material from liquid to gas is influenced by the molecular weight of 88 u, which also affects the boiling point. In addition, other elements like pressure and sample purity affect the boiling point.

The hydrogen bonds and molecular weight of 1-pentanol contribute to its boiling point. The forces that keep molecules in a liquid form are strengthened by hydrogen bonds, and the energy required to change a molecule from a liquid to a gas depends on its molecular weight.

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The mass of the marshmallow is 10.9 g.

The mass of a substance is the quantity of matter present in that substance.

The volume of a substance is the amount of space a given mass of that substance occupies.

The density of a substance is the ratio of the mass and a given volume of that substance.

Therefore, the relationship between mass, volume and density is given below as:

From the data provided:

volume of the marshmallow = 2.75 in³

1 inch³ = 16.39 cm³

volume in cm³ = 16.39 * 2.75

volume of the marshmallow = 45.07 cm³

density of the marshmallow = 0.242 g/cm³

Mass of the marshmallow = volume × density

Mass of the marshmallow = 0.242 g/cm³ * 45.07 cm³

Mass of the marshmallow = 10.9 g

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The equilibrium constant expression for the given system is: Keq = [CO₂] / [C][O₂]

Equilibrium constant, Keq for a given is defined as the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient

For example:

eB <=> cD

The equilibrium constant for the reaction above is given as

Keq = product / reactant

Keq = [D]^c / [B]^e

With the above illustration, we can obtain the equilibrium constant for the reaction given in the question. Details below:

From the question given above, the following data were obtained:

The equilibrium constant for the reaction reaction can be obtained as follow:

Keq = product / reactant

Keq = [CO₂] / [C][O₂]

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One approach focuses on tradition, while the other focuses on the treatment of women in their culture the response is cultural value. Hence option A is correct.

Traditions are defined as a notion or practice  that has been passed down within a community or society and has unique importance or symbolic value that dates back in time. Traditions are notions and convictions that are passed down from generation to generation.

Cultural value are defined as the fundamental values and concepts that underpin a community's existence and provide a foundation for its protection and reliance on peaceful coexistence. Cultural values are the fundamental notions of right and wrong held by a culture.

Thus, one approach focuses on tradition, while the other focuses on the treatment of women in their culture the response is cultural value. Hence option A is correct.

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Answer: only culture value

Explanation: just answered it

 This should bring you to the periodic table Can i Please have Brainliest