Can something be an acid and a base? Why and why not​

Answer:

The nucleus consists of 9 protons and 10 neutrons.  Nine electrons occupy available electron shells.

The calculated maximum wavelength is 495 nm

The energy needed to break a bond and create two atomic or molecular fragments, each containing one of the original shared pair of electrons, is known as the bond dissociation energy. The link between silicon and fluorine, which was previously discussed, is discovered to be the strongest chemical bond. The initial silicon-fluorine bond in a silicon tetrafluoride molecule requires 166 kcal/mol of bond dissociation energy to be broken.

ΔH=+240 kJ/mol

E=242×103/6.022×1023

=4.0186×10−19 J

Now I use the Planck Expression:

E=hf=hc/λ

∴λ=hc

Eλ=6.63×10−34×3×108/4.0186×10-19 m

λ=4.949×10−7 m

λ=495 nm.

Learn more about dissociation energy here-

https://brainly.com/question/20475991

#SPJ4

The mass of the gold block is 11,464.2 grams (or approximately 11.5 kg).

If we are given a block of gold with dimensions 27 cm (length), 11 cm (width), and 2.0 cm (thickness), we can calculate the volume and mass of the gold block.

The volume (V) of the gold block can be calculated using the formula:

V = length x width x thickness

Given values:

Length = 27 cm

Width = 11 cm

Thickness = 2.0 cm

Substituting the values into the formula:

V = 27 cm x 11 cm x 2.0 cm

V = 594 cm³

The volume of the gold block is 594 cm³.

To calculate the mass of the gold block, we need to know the density of gold. The density of gold is approximately 19.3 g/cm³.

The mass (m) of the gold block can be calculated using the formula:

m = density x volume

Given:

Density of gold = 19.3 g/cm³

Volume of the gold block = 594 cm³

Substituting the values into the formula:

m = 19.3 g/cm³ x 594 cm³

m = 11,464.2 g

The mass of the gold block is 11,464.2 grams (or approximately 11.5 kg).

learn more about mass here

https://brainly.com/question/11954533

#SPJ11

Answer:

The answer is color, temperature, turbidity, taste, and odor.

Secondary amine is what it is. Option (B3-dimethylbutan-2-amine )'s is the primary organic product created during the following reaction. Thus, if more hydrogen is added to carbon, we will obtain the main product, according to the Markovnikov Rule.

As a result, the main product produced by adding hydrogen to carbon-1, which has a higher concentration of hydrogen, and adding bromine to carbon-2 is 2-bromopropane. When a reaction follows Markovnikov's rule, a chemical or product is said to be a major organic product. The tertiary alkyl iodide is the largest byproduct of the second process, which transforms alcohol into alkyl iodide, while the secondary alkyl iodide is the minor byproduct.

To learn more about hydrogen here,

https://brainly.com/question/24433860

#SPJ4

Answer:

The correct answer is - sulfur.

Explanation:

In the periodic table, there are 18 groups and 7 rows or periods arranged according to their atomic number or electronic configuration. In the question, it is mentioned that the desired element atomic mass is less than the atomic mass of the selenium which is 78.96, and more than oxygen which is 15.99 with 6 electron valence and present in the third row.

As it has 6 valency of electron it must be in the 16 group of the table that comprises the 6 valency and as it is located in the 3rd row it must be sulfur that also has an atomic mass between selenium and oxygen.

The standard deviation and per cent relative standard deviation, which represent the uncertainty in the molarity of your EDTA titrant.

To calculate the uncertainty in the molarity of your EDTA titrant, we need some information about the measurements taken during the titration process. However, since the information is not provided, I will give you a general step-by-step guide to finding the uncertainty in molarity:
1. Record the volume measurements (in mL) for each titration trial.
2. Calculate the molarity of the EDTA titrant for each trial using the balanced equation of the reaction and the known molarity and volume of the analyte solution.
3. Find the mean (average) molarity of the EDTA titrant by summing the molarities calculated in step 2 and dividing by the total number of trials.
4. Calculate the deviation for each trial by subtracting the mean molarity from the molarity of each trial.
5. Square each deviation calculated in step 4.
6. Sum the squared deviations and divide by the total number of trials minus one (n-1) to find the variance.
7. Calculate the standard deviation by taking the square root of the variance.
8. Calculate the per cent relative standard deviation by dividing the standard deviation by the mean molarity and multiplying by 100.
After following these steps, you will have found the standard deviation and per cent relative standard deviation, which represents the uncertainty in the molarity of your EDTA titrant.

For more such questions on EDTA titrant.

brainly.com/question/30667405

#SPJ11

Answer:

I think c is the right answer

The NaOH extraction step would remove some acidic components, while the NaHCO3 extraction step may have limited effect if the significant acidic components have already been neutralized.

If you mistakenly extract a solution first with NaOH (aq) and then with NaHCO3 (aq), you would observe the following results:

NaOH Extraction:

When NaOH (aq) is added to the solution, it will react with acidic components present in the solution, such as carboxylic acids, phenols, or acidic functional groups. This reaction results in the formation of water-soluble salts or compounds, which will dissolve in the aqueous NaOH solution. As a result, the acidic components will be removed from the solution.

NaHCO3 Extraction:

When NaHCO3 (aq) is added to the remaining solution from the previous step, it will react with acidic components that were not neutralized by NaOH. NaHCO3 is a weaker base compared to NaOH and is primarily used to extract acidic compounds such as phenols and carboxylic acids. These acidic components will react with NaHCO3 to form water-soluble salts, which will dissolve in the aqueous NaHCO3 solution.

However, if NaOH is mistakenly used first, it is possible that some acidic components in the solution may have already reacted and been removed in the previous step. Therefore, the NaHCO3 extraction step may not yield significant additional changes or observable results.The results of mistakenly extracting the solution first with NaOH (aq) and then with NaHCO3 (aq) would depend on the nature and concentration of the acidic components present in the solution.

Learn more about carboxylic acids visit:

brainly.com/question/4721247

#SPJ11

Answer:

C

Explanation:

The correct answer is 0.3kJ

Sulphur can be changed from its rhombic form to monoclinic form at a transition temperature of 95.6⁰C as follows;

          Rhombic    →       Monoclinic

S(rhombic) + O₂(g)   →   SO₂(g)           ΔH= -296.06

This reaction can be reversed as follows;

SO₂(g)      →    S(monoclinic)  + O₂(g)           ΔH= +296.36

SO₂ is present on right side in first reaction and on left in the second reaction so it will be cancelled out and same case will be for O₂ it is present on left side in first reaction and on right side in second reaction so it will also be cancelled out.

So the equation left behind is;

        S(rhombic)    →       S(monoclinic)

So the enthalpy change can be as follows;

ΔH=  -296.06 + 296.36

ΔH=  0.3kJ/mol

Your question is incomplete but most probably your full question was;

From these data

S(rhombic) + O2 → SO2(g)    ΔH = -296.06kJ

S(monoclinic) + O2 → SO2(g)   ΔH = -296.36kJ

Calculate the enthalpy change for transformation

S(rhombic)  →  S (monoclinic)

(Monoclinic and rhombic are different allotropic forms of elemental sulfur.)

To look more about sulphur click here

brainly.com/question/23535995

#SPJ4

Teniendo en cuenta la ley de Boyle, el volumen del oxigeno a 415 mmHg, si la temperatura permanece constante, es 7,69 L.

Al aumentar el volumen, las partículas (átomos o moléculas) del gas tardan más en llegar a las paredes del recipiente y por lo tanto chocan menos veces por unidad de tiempo contra ellas. Esto significa que la presión será menor porque ésta representa la frecuencia de choques del gas contra las paredes.

De esta manera se relaciona la presión y el volumen, determinando la ley de Boyle que dice:

“El volumen ocupado por una determinada masa gaseosa a temperatura constante, es inversamente proporcional a la presión”

La ley de Boyle se expresa matemáticamente como:

P×V=k

Teniendo un estado inicial 1 y final 2, se cumple:

P₁×V₁= P₂×V₂

En este caso, se sabe que:

Reemplazando en la expresión matemática para la Ley de Boyle:

760 mmHg× 4.2 L= 415 mmHg× V₂

Resolviendo:

(760 mmHg× 4.2 L)÷ 415 mmHg= V₂

7,69 L= V₂

Finalmente, el volumen del oxigeno a 415 mmHg, si la temperatura permanece constante, es 7,69 L.

Aprende más:

The first thing we are going to analyze to solve the problem is our data, knowing what we have and what we need.

From what we can see, the problem asks us for the final volume, that is, P₂ , we are going to use the Boyle-Mariotte formula and start to isolate the variable we need to be able to start solving the problem. issue.

P₁V₁=P₂V₂

Clearing >> V₂

\(\boldsymbol{V_{2}=\dfrac{P_{1}V_{1} }{P_{2}} }\)

Substituting our data.

\(\boldsymbol{V_{2}=\dfrac{P_{1}V_{1} }{P_{2}}=\dfrac{(7600 \not{mmHg})(4.2 \ l)}{415\not{mmHg}}=\dfrac{3192}{415}l=7.69 \ l }\)

So our final volume is 7.69 liters.

With this we can conclude that while the pressure decreased the volume increased.

The expression for α0, α1, and α2 implicated in the speciation of H2CO3 into HCO3- and CO32- are:

(2)These reactions can be defined using the acid dissociation constant (Ka) of H2CO3 as follows:

From these definitions, the acid dissociation constants for H2CO3's first (Ka1) and second (Ka2) dissociation reactions can be expressed as shown below:

An acid is a molecule or ion that can donate a proton, or, alternatively, can form a covalent bond with an electron pair. The first category of acids is the proton donor or Brønsted acid. In the special case of an aqueous solution, the proton donor forms the hydronium ion H₃O⁺ and is known as an Arrhenius acid. PH is the degree of acidity or alkalinity of a solution, expressing the negative logarithm of the concentration of H ions with a base number of 10. Neutral solutions have a PH of 7, acids less than 7, bases greater than 7. In waters that are not polluted, PH is controlled by CO2 ions, Carbonates and Bicarbonates.

Learn More About Acid at https://brainly.com/question/25148363

#SPJ11

Grams of Chromium(III) nitrate produced : 268.95 g

Given

0.85 moles of Lead(IV) nitrate

Required

grams of Chromium(III) nitrate

Solution

Reaction

Balanced equation :

2Cr₂ + 3Pb(NO₃)₄ ⇒ 4Cr(NO₃)₃ + 3Pb

From the equation, mol ratio of Pb(NO₃)₄  : Cr(NO₃)₃ = 3 : 4, so mol Cr(NO₃)₃

mol Cr(NO₃)₃ =

\(\tt \dfrac{4}{3}\times 0.85=1.13\)

Mass of Chromium(III) nitrate (MW=238.0108 g/mol) :

mass = mol x MW

mass = 1.13 x 238.0108

mass = 268.95 g

1.20 L is the system's total volume.

The first law of thermodynamics states that the change in internal energy (ΔU) of a system is equal to the heat added (Q) to the system minus the work (W) done by the system, or ΔU = Q - W. Assuming that the only work done by the system is pressure-volume work, we can write this as ΔU = Q - PΔV, where P is the constant pressure and ΔV is the change in volume.

Solving for ΔV, we get ΔV = (Q - ΔU) / P. Substituting the given values, we get ΔV = (0.86 KJ - 970 J) / (2.5 atm) = -0.299 L.

The negative sign indicates that the volume of the system has decreased. To find the final volume, we can subtract ΔV from the initial volume: Vf = Vi + ΔV = 1.5 L - 0.299 L = 1.20 L.

Therefore, the final volume of the system is 1.20 L (without units), rounded to two decimal points.

To learn more about volume refer to:

brainly.com/question/14710169

#SPJ4

A metal must be all of the following except: solid, malleable, opaque, and electrically conductive. These properties are characteristic of metals and differentiate them from non-metals.

Metals are typically solid at room temperature, exhibiting a crystalline structure. They possess high melting and boiling points, allowing them to maintain their solid state under normal conditions. However, there are a few exceptions, such as mercury, which is a liquid metal at room temperature.

Malleability is another key feature of metals. It refers to their ability to be hammered or rolled into thin sheets without breaking. This property is due to the presence of loosely held electrons in the metal's atomic structure, allowing the atoms to slide past each other under pressure.

Metals are generally opaque, meaning they do not allow light to pass through them. Instead, they reflect or absorb light, giving them their characteristic luster or shine. This property is related to the way metals interact with electrons and photons.

Lastly, metals are excellent conductors of electricity. Their atomic structure allows free electrons to move easily through the material, enabling the flow of electric current. This property is crucial for various applications, such as electrical wiring and electronic devices.

In summary, a metal must possess the properties of being solid, malleable, opaque, and electrically conductive. Therefore, the correct answer is that a metal must be "none of the above" or "all of the given options."

Know more about Metal here:

https://brainly.com/question/29404080

#SPJ11

Answer:

it is synthesis reaction

Hydrophobic interactions are more powerful than other weak intermolecular forces. If the interacting molecules are in an aqueous solvent, the hydrophobic interaction is relatively strong.

An intermolecular forces is an attractive force that exists between the positive components (or protons) of one molecule and the negative components (or electrons) of another molecule. This force influences a substance's physical and chemical properties. The boiling point of a substance is proportional to the strength of its intermolecular forces; the stronger the intermolecular forces, the higher the boiling point.

We can compare the intermolecular forces of different substances by comparing their boiling points. This is because the heat absorbed by the substance at its boiling point is used to break these intermolecular forces and convert the liquid to vapor. Intermolecular forces are responsible for the majority of matter's physical and chemical properties.

Learn more about intermolecular forces here:

https://brainly.com/question/29773695

#SPJ4

Answer:

Easy 46 million turkeys

Medium three days

Hard: 1934

Fun: The first President on record issuing a "pardon" to his turkey was Ronald Reagan.

Explanation:

hop tis helped

oxygen,crabon dioxide,and glucose

Answer:

atp molecules & lactic acid

Explanation:

just did the assingment!

The number of molecules in 3.5 moles of NaCl is 2.107 × 10²⁴ molecules.

The number of molecules in a substance can be calculated by multiplying the number of moles by Avogadro's number as follows:

no of molecules = no of moles × 6.02 × 10²³

According to this question, 3.5 moles of NaCl are given. The number of molecules can be calculated as follows:

no of molecules = 3.5 × 6.02 × 10²³

no of molecules = 2.107 × 10²⁴ molecules

Therefore, 2.107 × 10²⁴ molecules is the number of molecules in the NaCl.

Learn more about no of molecules at: https://brainly.com/question/28319191

#SPJ1

Answer: a)

Explanation:

definition : The niche of an organism is the functional role that it plays within an ecosystem

The compound which has the larger lattice energy is CaCl2. The reason is discussed in the below section.

For the same group elements, Ca and Sr, the cation with a smaller size has a larger lattice energy. Ca^2+ is smaller than Sr^2+. A massive discrepancy in length both among cations or among anions, the factor with the bigger atomic radius will decrease the lattice electricity of its respective compound. Conversely, the ion with a smaller atomic radius will boom the electricity price of its respective compound. As we circulate from left to proper throughout the period, the lattice electricity increases. Because the electrons are introduced withinside the equal shell and the protons withinside the nucleus appeal to the ones electrons greater tightly. As a result, the atomic radius of the compound decreases and lattice electricity increases.

To learn more about atomic radius check the link below-

https://brainly.com/question/15255548

#SPJ4

Answer:

Garnet is a hard transparent mineral that is often used as gemstones and abrasives and quartz is the most abundant mineral on the earth's surface. They are both minerals that come out of the earth and that's about the most they have in common.

Explanation:

I got this answer correct.

The minerals quartz and garnet are both composed of silica but they differ in their color of crystals .

Minerals are defined as a chemical compound which has a well -defined composition and possesses a specific crystal structure.It occurs naturally in the pure form.

If a compound occurs naturally in different crystal structure then each structure is considered as a different mineral.The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.

Some minerals can have variable proportions of two or more chemical elements which occupy equivalent position in the crystal structure.It may also have variable composition which is split into separate species.

Physical properties of minerals include color,streak, luster,specific gravity and cleavage.

Learn more about  minerals,here:

https://brainly.com/question/1333886

#SPJ2

The reaction that occurs at the anode in the galvanic cell represented by Cu | Cu²⁺ || Ag⁺ | Ag is option A) Cu(s) → Cu²⁺(aq) + 2e⁻.

In a galvanic cell, the anode is the electrode where oxidation occurs. It is the site of electron loss and is negatively charged. In the given shorthand representation, the anode is represented on the left side with the symbol "Cu" indicating a copper electrode.

The anode reaction involves the conversion of the solid copper (Cu) electrode to copper ions (Cu²⁺) in the solution by losing two electrons (2e⁻). The reaction is represented as Cu(s) → Cu²⁺(aq) + 2e⁻, which is option A.

On the other hand, at the cathode, reduction occurs, which is the gain of electrons and is positively charged. In the given shorthand representation, the cathode is represented on the right side with the symbol "Ag" indicating a silver electrode.

Therefore, in the given galvanic cell, the reaction at the anode is the oxidation of copper, as stated in option A) Cu(s) → Cu²⁺(aq) + 2e⁻.

Learn more about galvanic cell here:

https://brainly.com/question/29784742

#SPJ11

Answer:

69.2°C

Explanation:

Recall the heat energy formula

q = cmΔT

where q = heat energy ( measured in joules ) , c = specific heat , m = mass and ΔT = change in temperature.

We are given that:

Given this we want to find the temperature change.

First we want to define our variables.

Again recall that heat energy (q) = 450J , mass(m) = 50g and specific heat (c) = 0.13 J/g(degC)

Now that we have defined our variables we plug in the values of the variables into q = cmΔT and solve  for the undefined variable

q = cmΔT

q = 450 , m = 50, c = 0.13

450 = (50) x (0.13) x (ΔT)

multiply 50 and .13

450 = 6.5 x (ΔT)

divide both sides by 6.5

69.2 = ΔT

The change in temperature was 69.2°C

Pine's method involves visualizing a dog standing on its hind legs with its front legs stretched out to the sides, representing the two substituents on the anomeric carbon in Fischer projection.

Pine's method of drawing a dog to convert from Fischer to Haworth is a mnemonic device that helps to simplify the process of converting between the two representations of cyclic sugars. The dog's head represents the O atom in the ring, while its tail represents the CH2OH group. By rotating the dog counterclockwise by 90 degrees and then flipping it over, the Haworth representation can be obtained, with the head of the dog now pointing downwards and the tail pointing upwards. The dog's hind legs represent the two substituents on the anomeric carbon in the Haworth projection. Overall, Pine's method provides an easy and memorable way to convert between Fischer and Haworth projections.

To know more about Fischer and Haworth Projections:

https://brainly.com/question/31379596

#SPJ11

Answer: 59.41

Explanation:

The final temperature of the system has been 130\(\rm ^\circ C\).

Specific heat can be defined as the amount of heat required to raise the temperature of 1 g of substance by 1-degree celsius.

The amount of heat lost and the heat gained have been equal.

Heat = mass × specific heat × change in temperature

Thus,

mc\(\Delta\)T = mc\(\Delta\)T

50 g × (10 - x) = 120 × (x - 80)

500 - 50x = 120x - 9600

70x = 9100

x = 130

Thus, the final temperature of the system has been 130\(\rm ^\circ C\).

For more information about the final temperature of the system, refer to the link:

https://brainly.com/question/13639803