which scientist developed the planetary model that stated electrons were found in specific energy levels around the nucleus?

We are told that starch consists of glucose polymer, so we can assume that the caloric value of starch will be equal to the caloric value of glucose, that is, 3.9kcal/g.

Now to determine the kcal and kJ there were in the potato we must calculate the mass of starch present in that potato. We are told that it is 92% starch, therefore the mass of starch in the potato will be:

We have that in the potato there are 160.08 grams of starch. By multiplying it by the caloric value we will have the kcal that were in the potato, assuming that the rest of the ingredients do not contribute caloric value, or it is insignificant.

To calculate the kJ we must make the conversion using the relationship that 1 cal is equal to 4.184 joules:

In the potato, there were 624 kcal of energy or 2612kJ of energy.

The correct options are:

☑ Acid chlorides

☑ Aldehydes

☐ Amides

☐ Carboxylic acids

☑ Ketones

Sodium borohydride (NaBH4) is a common reducing agent that can reduce many functional groups. Among the options provided, it can reduce aldehydes, ketones, and acid chlorides, but cannot reduce amides or carboxylic acids. Therefore, the correct options are:

☑ Acid chlorides

☑ Aldehydes

☐ Amides

☐ Carboxylic acids

☑ Ketones

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Answer:

526.85K

Explanation:

Based on Charles's law, the volume of a gas is directly proportional to absolute temperature. The formrula is:

V₁ / T₁ = V₂ / T₂

Where 1 represents the initial state and 2 the final state of the gas

Using the values of the problem:

V₁ = 10.0L

T₁ = 127°C + 273.15K = 400.15K

V₂ = 20.0L

Thus, replacing in the formula:

10.0L / 400.15K = 20.0L / T₂

T₂ = 800K

In Celsius:

800K - 273.15 = 526.85K

It is advised that your friend take 172-425 grams of carbs, dependant on his size of 86 kg, two hours before to his soccer match. The ideal choice is D.

As a result of the vitamins, nutrients, and dietary fiber they provide, full grain, berries, and vegetables are regarded as healthy carbohydrates. Contrarily, processed or refined carbohydrates like white spaghetti, sweetened beverages, and desserts have little to no nutritious benefit and therefore to be avoided altogether.

Carbohydrates carry out a variety of essential functions in your body. They are the main source of fuel for your brain's calorific values and give you energy for daily chores.

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Answer:

I am not yet sure on my answer

I would not want to give you wrong answers

Sorry

To raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is 5.434×10¹ kJ.

For a substance, it's specific heat capacity is the amount of energy required to raise the temperature of unit mass of that substance by 1°C.

If, specific heat capacity (c) = 4.18 J/ g°C

Mass of the substance (m) = 250.0 g

Change in temperature (ΔT) = 52°C

Energy (Q) = ?

Then mathematically the relation could be represented as

  c = \(\frac{Q}{ \ m \ (\Delta\ T )}\)

Therefore,  \(Q = m\times c \times (\Delta\ T)\)

                   \(Q = 250 \times 4.18 \times 52\)

                   \(Q = 54,340 J\\Q = 5.434 \times 10^1 kJ\)  

So, to raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is  5.434×10¹ kJ.

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Answer:

92 is that atomic number and 238.03 is the atomic mass number

Explanation:

The structure of the atom is given as:

                    ⁹²₂₃₈.₀₃U

The number 92 is the atomic number of the atom.

  The atomic number is the number of protons within an atom. This number defines the nature and type of atom that we have.

238.03 is the atomic mass number;

  The is the number of protons and neutrons within an atom. It is typically the mass of nucleus.

Answer:

SF4 -Covalent bond

BaBr2 - Ionic bond

Ca - Metallic bond

Explanation:

Sulphur and fluorine are non metals. Nonmetal atoms combine by the sharing of electrons. This is also called a covalent combination(bond).

In BaBr2, a metal is combined with a nonmetal. This combination involves a transfer of electrons from the metal to the nonmetal forming an ion pair. This is otherwise called an ionic bond.

Atoms of a metal are held together by strong metallic bonds that involves positively charged cations and a cloud of electrons.

Answer:

86.6 mL

Explanation:

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

Initial volume (V₁) = 56.8 mL

Initial pressure (P₁) = 664 mmHg

Initial temperature (T₁) = 135 K

Final pressure (P₂) = 632 mmHg

Final temperature (T₂) = 196 K

Final volume (V₂) =?

The final volume of the gas can be obtained as follow:

P₁V₁/T₁ = P₂V₂/T₂

664 × 56.8 / 135 = 632 × V₂ / 196

Cross multiply

135 × 632 × V₂ = 664 × 56.8 × 196

85320 × V₂ = 7392179.2

Divide both side by 85320

V₂ = 7392179.2 / 85320

V₂ = 86.6 mL

Therefore, the final volume of the gas is 86.6 mL

Answer:

Electromagnetic waves are typically described by any of the following three physical properties: frequency (f), wavelength (λ), or intensity (I). Light quanta are typically described by frequency (f), wavelength (λ), or photon energy (E).

Explanation:

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For a volume of tissue, the Dose `D would be 1 × 10^6 [cm−2] × 0.0233 [cm2 g−1] × 1 [MeV] / 1.602 × 10^-13 [J MeV−1] × 1.0 [g] = 1.448 mGy]`. The condition that is necessary to make this calculation is to assume a tissue type because the value of the energy absorption coefficient varies with different tissue types.

A) Calculation of dose in mGy for a volume of tissue and fluence of 1 × 10^6 [cm−2] of an energy of 1 MeV

For this calculation, the required formula is:

`Dose = Fluence × Energy Absorption Coefficient`

The fluence given is:

1 × 10^6 [cm−2] of an energy of 1 MeV

The value of energy absorption coefficient varies according to the tissue. Therefore, we have to assume a tissue type.For example, for the tissue type of soft tissue, the value of the energy absorption coefficient is:

0.0233 [cm2 g−1]

Thus, Dose `D = 1 × 10^6 [cm−2] × 0.0233 [cm2 g−1] × 1 [MeV] / 1.602 × 10^-13 [J MeV−1] × 1.0 [g] = 1.448 mGy]`

B) Condition necessary to make this calculation and why?

The condition that is necessary to make this calculation is to assume a tissue type because the value of the energy absorption coefficient varies with different tissue types.

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pCO2 is an important factor that affects various aspects of water chemistry and the impacts of ocean acidification. When pCO2 increases, the concentration of total CO2 dissolved in water also increases. This leads to changes in pH, which decreases due to increasing atmospheric CO2 concentration.

When pCO2 rises, the concentration of only CO2 dissolved in water increases. The dissolved CO2 forms carbonic acid, which contributes to the acidification of the ocean. This increase in CO2 affects the equilibrium between CO2, HCO3-, and CO3^2-, shifting it towards higher levels of dissolved CO2 and H+ ions, resulting in a lower pH.

In terms of the impacts of ocean acidification on different organisms, the effects can vary depending on their specific needs. An organism that requires CO2 is likely to fare better under ocean acidification since the increase in dissolved CO2 can provide them with a favorable environment. However, organisms that rely on HCO3- or CO3^2- may fare worse under ocean acidification, as the lower pH interferes with the availability of these carbonate ions, which are essential for shell formation and calcification in some marine organisms.

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Answer:

CuCi2 + H2S ⇒ CuS + 2HCi

Explanation:

In order to balance a chemical equation you need to make sure to have the same number of atoms on each side by multiplying on both sides.

CuCi2 + H2S = CuS + HCi

Cu = 1

Ci = 2

H = 2

S = 1

Product

Cu = 1

S = 1

H = 1 × 2 = 2

Ci = 1 × 2 = 2

Since all elements have a balanced amount of atoms, the equation is now balanced.

CuCi2 + H2S ⇒ CuS + 2HCi

Hope this helps.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the charge are both equal. Here the balanced equation is CuCl₂ + H₂S → CuS + 2HCl.

A balanced chemical equation, in which the masses of the reactants and products are equal, contains the same amount of atoms of each element on both sides of the equation. In other words, both sides of the reaction have an equal balance of mass and charge.

The chemical equation is said to be balanced if there are no inequalities. Here the balanced equation is:

CuCl₂ + H₂S → CuS + 2HCl

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Answer: A dominant allele is a variation of a gene that produces a dominant phenotype in individuals who have just one copy of the allele, which can come from just one parent, and a recessive allele is when the individual must have two copies, one from each parent to produce a recessive phenotype, also a recessive allele is an allele that is completely masked phenotypically by a dominant allele.

The trend of atomic radius refers to the predictable pattern of the size of atoms as one moves across or down the periodic table of elements.

Moving across a period (from left to right), the atomic radius of an element generally decreases. This is because the number of protons and electrons in the atom increases, leading to a stronger attractive force between the positively charged nucleus and negatively charged electrons. The increased pull causes the electron cloud to be pulled in closer to the nucleus, making the atomic radius smaller.

Moving down a group (from top to bottom), the atomic radius generally increases. This is because each successive element has one additional energy level than the element above it, and the electrons in these energy levels are farther from the nucleus. The increase in distance between the outermost electrons and the nucleus results in an increase in the atomic radius.

Therefore, the general trend of atomic radius is that it decreases from left to right across a period and increases from top to bottom down a group.

The following would have a larger atomic radius in the pair;

1) Ge

2) Fe

3) Kr

4) Sr

5) Na

6) I

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The empirical formula of the compound is H₂SO₄.

Given here the compound contains 2.04% hydrogen (H), 32.65% sulphur (S) and 65.31% oxygen (O).

The atomic masses of H, S and O are 1 g/mol, 32g/mol and 16 g/mol respectively.

Now we calculate no. Of moles of each atom.

The number of moles of H = 2.04/1 =2.04mol

The number of moles of S = 32.65/32 = 1mol. (approx.)

The number of moles of O= 65.31/16 = 4mole.

Empirical formula can be determined by the mole ratios of the atoms.

Mole ratio H:S:O is 2:1:4 ,so the empirical formula is found to be H₂SO₄.

H₂SO₄ formula indicates that the given compound is Sulphuric acid.

The molecular formula provides the precise quantity of each unique element present in a molecule ,while the empirical formula of a compound provides the simplest ratio of the number of various atoms present. It is an empirical formula if it has been simplified. compound’s empirical formula is directly related to its percentage content.

Sulphuric acid is also known as oil of vitriol It Is a viscous liquid that is miscible with water. It has no color or smell. It is used in production of fertilizers, pigments, dyes, medicines, explosives, detergents, inorganic salts.

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Answer:

Mineral water> Bitter gourd juice> Orange juice> Hydrochloric acid

Explanation:

pH is referred to as the degree of acidity or alkalinity of a substance. The pH scale is arranged from 0-14. Substance with a pH of 0-6.9 are acid, a pH of 7 indicates neutrality while a pH of 8-14 indicates alkalinity.

Mineral water is usually slightly acidic with a pH between 5-6. The pH of bitter gourd juice is between 4.24-4.45. The pH of orange juice ranges between 3.3 to 4.2 lastly, the pH of hydrochloric acid is about 3.01.

The pH values itemized above informed the arrangement of decreasing pH values shown in the answer box.

Li₂CO₃ is lithium carbonate. It is a medication used as an antidepressant, mood stabilizer, and antipsychotic drug.

Lithium carbonate (Li₂CO₃) is a medication commonly used to treat bipolar disorder, a mental illness characterized by episodes of depression and mania. It can also be used to treat other psychiatric conditions, such as major depressive disorder and schizophrenia.

Lithium carbonate works by altering the levels of certain brain chemicals, such as serotonin and norepinephrine, which play a crucial role in regulating mood. By stabilizing these chemicals, lithium can reduce the severity and frequency of mood swings in individuals with bipolar disorder.

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Recycling is preferable to diverting scrap because it prevents the metal from being remelted, which would result in higher \(CO_2\) emissions. This statement is false.

While diverting scrap from the waste stream can be a positive environmental action, it is not necessarily better than recycling. Recycling and diverting scrap both play important roles in reducing greenhouse gas emissions and conserving natural resources.

Recycling involves taking materials and transforming them into new products, reducing the need for materials and decreasing the amount of waste that goes to landfills. By reducing the need for materials, recycling also helps to conserve natural resources and reduce carbon emissions associated with extracting and processing raw materials.

Diverting scrap, on the other hand, typically involves reusing or repurposing materials in their existing form, rather than remelting them. While this can be a positive environmental action, it does not necessarily lead to a reduction in greenhouse gas emissions. In fact, recycling often has a smaller carbon footprint than diverting scrap because the process of remelting and reprocessing metals is more energy-efficient than producing new metals from materials.

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Answer:

Explanation:

Silver nitrate grams to moles

1 grams Silver Nitrate is equal to 0.0058867472248402 mole

In the titration of a weak acid with a strong base, the point where half of the acid has reacted with the base is noteworthy because the ph equals: the pKa.

In layman's terms, pKa is a measurement of an acid's strength. A strong acid will have a pKa value that is lower than 0. To be more specific, pKa is the Ka value's negative log base ten value (acid dissociation constant). It gauges an acid's potency by determining how firmly a proton is retained by a Bronsted acid.

The strength of the acid and its capacity to donate protons increase with decreasing pKa values.

Acid dissociation constant, Ka, gauges how well an acid separates from its water-soluble constituents. Since acid generally dissociates into its ions, the stronger the acid, the higher the value of Ka.

The following equation describes the connection between pKa and Ka:

pKa = –log[Ka]

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When a bottle of carbonated drink is opened, the pressure inside the bottle decreases, causing the carbon dioxide (CO2) gas to escape from the liquid and create bubbles. This is what gives the drink its characteristic fizziness and tangy taste.

Carbon dioxide (CO2) is a colorless, odorless gas composed of one carbon atom and two oxygen atoms. It is a naturally occurring component of the Earth's atmosphere, where it makes up approximately 0.04% of the air we breathe.

When a bottle of carbonated drink is opened, the pressure inside the bottle reduces, causing the carbon dioxide (CO2) gas to escape from the liquid and create bubbles.

However, as time passes, the carbon dioxide gas continues to escape from the drink, causing the pressure inside the bottle to decrease even further. As a result, the bubbles become smaller and fewer, and the drink gradually loses its carbonation. This loss of carbonation is what makes the drink taste "flat."

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Answer

AlBr₃ is the limiting reactant

Explanation

Mass of AlBr₃ = 23.45 g

Mole of AlBr₃ = Mass/molar mass = 23.46 g/266.69 g/mol = 0.08797 mol

Mass of Na₂O = 34.57 g

So mole of Na₂O = mass/molar mass = 34.57 g/61.9789 g/mol = 0.5578 mol

Mole ratio of AlBr₃ to Na₂O = (0.08797/0.08797) : (0.05578/0.08797) = 1:6

To know the limiting reactant, write a chemical equation for the reaction and compare the reactant mole ratio in the equation with the mole ratio above.

2AlBr₃ + 3 Na₂O -----> Al₂O₃ + 6NaBr

Mole ratio in the equation = 2:3

Comparing the mole ratio, AlBr₃ will be the first to be completely consumed.

Therefore, AlBr₃ is the limiting reactant

The paired t-test yields a different conclusion than the normal t-test because it accounts for the paired nature of the data, comparing the measurements taken at the top and bottom of the lake separately.

In this scenario, the paired t-test is appropriate because it analyzes the data as pairs, considering the chloride levels measured at the top and bottom of the lake for each sample. By comparing the differences within each pair, the paired t-test determines whether there is a significant difference between the chloride levels at the top and bottom of the lake.

Using the paired t-test, the differences between the paired observations are calculated, and the null hypothesis assumes that the mean difference is zero (no significant difference between the top and bottom chloride levels). The test then determines whether the observed differences are statistically significant at a chosen confidence level, in this case, 95%.

The normal t-test for differences in means, on the other hand, would treat the top and bottom chloride levels as separate and unrelated groups, disregarding their paired nature. By pooling the data and conducting a standard t-test, the analysis assumes that the two sets of measurements are independent, which may not be appropriate in this case. This can lead to a different conclusion compared to the paired t-test.

The different conclusion drawn from using the paired t-test compared to pooling the data and using the normal t-test is due to the consideration of the paired nature of the measurements. The paired t-test takes into account the potential correlation or connection between the measurements taken at the same location (top and bottom of the lake) and assesses the differences within each pair.

Pooling the data and using the normal t-test treats the measurements as independent, disregarding the pairing. This can result in a loss of valuable information and may lead to an inaccurate conclusion. The paired t-test is more appropriate when dealing with dependent or related measurements, ensuring a more accurate assessment of the differences between the top and bottom chloride levels.

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Answer:

Explanation:

we know that ideal gas equation is

PV=nRT

P=nRT/V

V=10.3L

n=10.67

T=21.2+273=294

R=0.0821

P=10.67*0.0821*294/10.3

P=25.00atm

Answer:

P = 25.0 atm

Explanation:

Given data:

Volume of gas = 10.3 L

Number of moles of Cl₂ = 10.67 mol

Temperature = 21.2 °C

Pressure of gas = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

21.2+273 = 294.2 K

10.3 L × P = 10.67 mol ×  0.0821 atm.L/ mol.K  × 294.2 K

P = 257.72 atm.L /  10.3 L

P = 25.0 atm

Answer:

my answer I think is tetrahedral

A molecule's structure is likely to contain numerous double bonds, triple bonds, or rings if it has four unsaturation components. These unsaturations may be connected to different functional entities or structural elements.

The following functional groupings or structural elements could be present:

Quatre double bonds. One ring and two double bonds, such as an aromatic molecule or cycloalkene One ring and one triple bond, such as an aromatic compound with an alkyne

Four rings, such as those seen in polycyclic aromatic hydrocarbons

In the proton NMR spectrum, there are peaks between 7.0 and 8.0 ppm that are often connected to aromatic protons. In this chemical shift area, aromatic compounds, such as benzene derivatives or other aromatic rings, frequently display proton signals.

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--The complete Question is, If a molecule contains 4 elements of unsaturation, what functional groups or structural features might be present in the molecule, and what would be the likely interpretation of the peaks observed between 7.0 - 8.0 ppm in the proton NMR spectrum?--

The concentration of the sulfuric acid (95% w/w) and its specific gravity, we need to calculate the mass of sulfuric acid required to make 2 liters of 10% w/v acid.

Sulfuric acid (H2SO4) is a strong mineral acid, which is commonly used in a variety of industrial and chemical applications. It is a colorless, dense, oily liquid that has a highly corrosive nature and a strong sour odor. Sulfuric acid is composed of sulfur, hydrogen, and oxygen and is highly reactive, forming strong bonds with other compounds. It is a strong oxidizing agent, and its reaction with water produces heat and hydrogen gas. It can react with both organic and inorganic compounds and is commonly used to manufacture fertilizers, dyes, oils, and detergents. Sulfuric acid is also used in the processing of many metals, including copper, lead, and zinc.

The mass of sulfuric acid required = (2 liters * 10g/100ml * 1.820 g/ml) = 36.4 g

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