Explain the two main allotropes of sulphur

We must take into account the starting pH values of the acids in order to estimate which acid will need the most base to reach the equivalence point.

The table shows that hydrochloric acid, with an initial pH of 0.3, has the lowest pH value. This indicates that it is the most acidic and that the most base will be needed to achieve the equivalence point.

Thus, the acid that will require the most base to reach the equivalence point is hydrochloric acid.

The point in a titration where the amount of moles of acid and base are equal is known as the equivalence point. The acid and base have finished reacting at the equivalence point, leaving a neutral solution.

We need to take into account the acid with the higher initial pH, as this implies that it is the strongest acid, to estimate which acid will require the most volume of base to reach the equivalence point.

We can see from the table that hydrochloric acid has the lowest initial pH of the four, 1.3, indicating that it is the strongest acid. As a result, the most base must be added to the hydrochloric acid to reach the equivalence point.

learn more about pH here

https://brainly.com/question/172153

#SPJ1

Answer:

1 mole= 39.997 grams/moles, so you would have to do 40*1.5 to get to 60 Grams

60 is your answer

Explanation:

It was not allowing me to answer but now it is, so yea

KOH reacting with 1-propanol because it contains acidic propanol that gives acid- base reaction.

Acid base reaction is also called as neutralization reaction. It is defined as a chemical reaction in which acid and a base react quantitatively with each other. Neutralization is a type of chemical reaction that involves the exchange of one or more hydrogen ions, H+, between species that may be neutral that is molecules such as water, H2O or electrically charged ions, such as ammonium, NH4+ hydroxide, OH− or carbonate, CO32−. It also includes similar processes that occur in molecules of KOH.

The hydroxide ion of KOH attacks the carbon atom when 1-propanol is combined with KOH that causes the 1-propanol hydroxyl group to be replaced by a new OH- ion from KOH. This is also known as neutralization reaction.

To learn more about Acid base reaction

https://brainly.com/question/30389999

#SPJ4

Answer: B. When reactants collide with enough energy to intersect their valence shells and form new bonds.

The pH of a 0.01 M solution of caffeine is in the range of 9.68-9.76.

The chemical formula of caffeine is [tex]C_{8}H_{10}N_{4}O_{2}[/tex]. Caffeine forms a basic solution when dissolved in water. The KB value of caffeine is 4 x 10^-4. The expression for the basicity constant of caffeine is given as:

KB = [OH-][caffeine] / [[tex]C_{8}H_{10}N_{4}O_{2}H^{+}[/tex]]

In a solution of caffeine, the concentration of caffeine and its conjugate acid is equal. The pH of the solution is determined by calculating the concentration of hydroxide ions (OH-) in the solution. The relationship between the concentration of hydroxide ions (OH-) and the basicity constant (KB) is given as:

Kw = Ka x Kb

Where Kw is the ionization constant for water and has a value of 10^-14.

Ka is the acidity constant for caffeine and is given as:

Ka = Kw / Kb = 10^-14 / 4 x 10^-4 = 2.5 x 10^-11.

The expression for the ionization constant for caffeine is given as:

Kb = [OH-][C8H10N4O2] / [C8H10N4O2H+][OH-] = Kb[C8H10N4O2H+] / [C8H10N4O2]

Concentration of caffeine, [C8H10N4O2] = 0.01 M

Concentration of the conjugate acid, [C8H10N4O2H+] = 0.01 M

The pH of the solution can be calculated as:

pH = pKb + log [base] / [acid]

pKb = -log Kb = -log 4 x 10^-4 = 3.4

[base] = [C8H10N4O2] = 0.01 M

[acid] = [C8H10N4O2H+] = 0.01 M

Substituting the values of pKb, [base] and [acid] in the above equation, we get:

pH = 3.4 + log 0.01 / 0.01pH = 3.4 + log 1pH = 3.4 + 0pH = 3.4

Therefore, the pH of a 0.01 M solution of caffeine is in the range of 9.68-9.76.

To learn more about "caffeine", visit: https://brainly.com/question/26670237

#SPJ11

Ideally, the spots on the TLC plate should run between 1-1.5 cm from the origin to calculate the most accurate Rf values.

TLC (Thin Layer Chromatography) is a simple and cost-effective analytical technique used to identify, analyze, and monitor the purity of compounds. A thin layer of silica gel or alumina is applied to a glass or plastic plate in this method. The compound(s) to be analyzed is spotted on the plate's silica layer, and the plate is put in a solvent to allow the sample to move up the plate by capillary action.

TLC is used to:

The ideal distance that spots should run up a TLC (thin-layer chromatography) plate depends on several factors, including the type of stationary phase and the nature of the mobile phase being used. However, as a general rule, the spots should be applied to the TLC plate at a distance of about 1-1.5 cm from the bottom edge of the plate.

This allows the solvent front to migrate up the plate and separate the components of the mixture, without causing the spots to merge or overlap. The spots should not be placed too high up the plate as this will result in poor separation and reduced accuracy of the Rf (retention factor) values.

Once the solvent front reaches a suitable distance from the top of the plate (usually around 1-2 cm), the plate should be removed from the chamber and allowed to dry. The Rf value can then be calculated by dividing the distance traveled by the spot by the distance traveled by the solvent front.

Learn more about TLC (Thin Layer Chromatography) here: https://brainly.com/question/30788801

#SPJ11

Strength of attraction for electrons by an oxygen atom within water molecule is stronger than strength of attraction for electrons by hydrogen atom within ammonia molecule.

Strength of attraction for electrons by an atom is determined by its electronegativity, which is a measure of how strongly an atom attracts electrons towards itself in chemical bond. Oxygen has higher electronegativity than hydrogen, which means that oxygen has stronger attraction for electrons as compared to hydrogen.

In the chemical reaction given, N2(g) + 3H2(g) → 2NH3(g), hydrogen atoms are involved in the formation of ammonia (NH3) molecules. In the ammonia molecule, nitrogen atom is more electronegative than hydrogen atoms, causing electrons in covalent bonds to be more strongly attracted to nitrogen atom.

To know more about strength of attraction for electrons, refer

https://brainly.com/question/864796

#SPJ1

Answer:

on it iis renewable energy it is independent

Answer:

defined the objective of the lab, showing critical thinking skills.

68.7 grams

The first step is to calculate the volume of the room in cubic meters. 12 ft X 12 ft X 8.0 ft = 345.6 cubic feet. Converting cubic feet to cubic meters, we get 9.793 cubic meters.

Next, we need to calculate the mass of air in the room. The density of air at 1.00 atm and 25°C is approximately 1.2 kg/m³. Multiplying this density by the volume of the room, we get 11.752 kg of air.

To calculate the amount of heat needed to raise the temperature of the air from 40°F to 78°F, we need to know the specific heat capacity of air. The specific heat capacity of air at constant pressure is approximately 1.005 kJ/kgK.

The temperature difference is (78 - 40) = 38°F, which is equivalent to (38/1.8) = 21.1°C. Converting to Kelvin, we get (21.1 + 273.15) = 294.25 K.

Now we can calculate the amount of heat needed using the formula:

Q = mcΔT

where Q is the amount of heat needed, m is the mass of air, c is the specific heat capacity of air, and ΔT is the temperature difference.

Plugging in the values, we get:

Q = (11.752 kg) x (1.005 kJ/kgK) x (294.25 K - 25°C)

Q = 3,292 kJ

Finally, we can use the thermochemical equation to calculate the mass of octane needed to produce this amount of heat:

5471 kJ of heat is produced by the combustion of 1 mole of octane. Therefore, to produce 3292 kJ of heat, we need:

(3292 kJ) / (5471 kJ/mol) = 0.601 mol of octane

The molar mass of octane is approximately 114 g/mol. Therefore, the mass of octane needed is:

(0.601 mol) x (114 g/mol) = 68.7 g of octane

So, approximately 68.7 grams of octane would need to be burned to produce enough heat to raise the temperature of the air in a 12 ft X 12 ft X 8.0 ft room from 40°F to 78°F on a mild winter's day.

To generate enough heat to boost the air's temperature, about 68.7 grammes of octane would need to be burned.

With the chemical formula C8H18 and the condensed structural formula CH3(CH2)6CH3, octane is both an alkane and a hydrocarbon.

The room's cubic meterage must be determined in the first stage.

= 12 ft X 12 ft X 8.0 ft = 345.6 cubic feet.

= 9.793 cubic meters.

Next, we must determine the air mass in the space. At 1.00 atm and 25°C, air has a density of around 1.2 kg/m3.

By dividing this density by the room's volume, we arrive at 11.752 kg of air.

At constant pressure, the specific heat capacity of air is roughly 1.005 kJ/kgK.

The temperature difference is (78 - 40) = 38°F,

which is equivalent to (38/1.8) = 21.1°C

= (21.1 + 273.15) = 294.25 K

Now we can calculate the amount of heat needed using the formula:

Q = mcΔT

Plugging in the values, we get:

Q = (11.752 kg) x (1.005 kJ/kgK) x (294.25 K - 25°C)

Q = 3,292 kJ

5471 kJ of heat is produced by the combustion of 1 mole of octane. Therefore, to produce 3292 kJ of heat, we need:

(3292 kJ) / (5471 kJ/mol) = 0.601 mol of octane

The molar mass of octane is approximately 114 g/mol. Therefore, the mass of octane needed is:

(0.601 mol) x (114 g/mol) = 68.7 g of octane

To know more about hydrocarbon visit:-

https://brainly.com/question/17578846

#SPJ1

The change in free energy for the dissolution of 1.00 mol of NaBr at 298.15 K is -2.35 kJ.

a. The balanced equilibrium equation for the dissolution of NaI in water is:

NaI(s) ⇌ Na+(aq) + I-(aq)

b. The change in free energy (ΔG) can be calculated using the equation:

ΔG = ΔH - TΔS

where ΔH is the enthalpy change, T is the temperature in Kelvin, and ΔS is the entropy change. Plugging in the values for NaI:

ΔG = (-7.50 kJ/mol) - (298.15 K)(74.0 J/mol•K) / 1000 J/kJ

ΔG = -9.52 kJ/mol

Multiplying by the number of moles dissolved:

ΔG = -9.52 kJ/mol x 1.18 mol = -11.24 kJ

Therefore, the change in free energy when 1.18 moles of NaI is dissolved in water at 25.0°C is -11.24 kJ.

c. The change in free energy for the dissolution of NaBr can be calculated using the same equation:

ΔG = ΔH - TΔS

Plugging in the values for NaBr:

ΔG = (-0.860 kJ/mol) - (298.15 K)(57.0 J/mol•K) / 1000 J/kJ

ΔG = -2.35 kJ/mol

Therefore, the change in free energy for the dissolution of 1.00 mol of NaBr at 298.15 K is -2.35 kJ.

Learn more about equilibrium equation here brainly.com/question/31027606

#SPJ4

The specific rotation of a compound that has an observed rotation of 25.0° when the concentration is 5 g/ml and the pathlength is 1 dm is    0.5°·mL/g·cm.

The specific rotation of a compound can be calculated using the formula:

Specific Rotation = [α] = Observed Rotation / (Concentration × Pathlength)

In this case, the observed rotation is 25.0°, the concentration is 5 g/mL, and the path length is 1 dm. Plugging these values into the formula, we get:

Specific Rotation = [α] = 25.0° / (5 g/mL × 1 dm)

Since 1 dm = 10 cm, we need to convert the pathlength to cm:

Specific Rotation = [α] = 25.0° / (5 g/mL × 10 cm)

Specific Rotation = [α] = 25.0° / 50 g·cm/mL

Specific Rotation = [α] = 0.5°·mL/g·cm

So, the specific rotation of the compound is 0.5°·mL/g·cm.

To know more about Specific Rotation:

https://brainly.com/question/30888051

#SPJ11

The statement "a spontaneous reaction is always a slow reaction" is not true.

The spontaneity of a reaction refers to whether the reaction will occur spontaneously or not, without the input of external energy or work. A spontaneous reaction has a negative change in Gibbs free energy (∆G)  indicating that the reaction is thermodynamically favorable.

On the other hand, the rate of a reaction refers to how fast the reaction occurs. The rate of a reaction depends on factors such as the activation energy of the reaction the concentrations of the reactants and the presence of catalysts or inhibitors.

Therefore, whether a reaction is spontaneous or not has no direct relationship to its rate. A spontaneous reaction can occur at a fast or slow rate, depending on the specific reaction conditions. Similarly a non-spontaneous reaction can also occur at a fast or slow rate if sufficient energy or activation energy is supplied to the reaction.

Learn more about spontaneous reaction here : brainly.com/question/29315358

#SPJ1

The primary allylic radical is the major resonance structure which contributes most to the: hybrid.

The concept of resonance is an important feature of bonding in organic molecules, especially those that are highly conjugated. Resonance happens when there are two or more valid Lewis structures for the same molecule, and the actual electronic distribution is an average of these structures.

Resonance is a characteristic of molecules with alternating pi bonds. The electrons that are delocalized in the pi system are moved around by resonance, resulting in a molecule with a lower energy state. The molecule's actual electronic distribution is not the same as any of the resonance structures, but rather an average of all of them.

An allylic radical is a radical species that is bonded to an allylic position. Alkene molecules that have at least one double bond and one or more adjacent carbon atoms to the double bond, which is called an allylic position. The carbon-carbon double bond is stabilized by the allylic position.

As a result, when a radical is placed on an allylic carbon, it is often more stable than when it is placed on a non-allylic carbon. As a result, the radical is more likely to form at an allylic carbon than at a non-allylic carbon.

To know more about "Resonance" refer here:

https://brainly.com/question/11331041#

#SPJ11

Moon jellyfish population births could increase as a result of environmental factors such as temperature, nutrient availability, food availability, etc.  

The moon jellyfish is a marine species that belongs to the genus Aurelia. Moon jellies are very common and can be found in oceans worldwide. They have a life cycle that includes both asexual and sexual reproduction, which can cause their population to fluctuate.

Moon jellies are affected by various environmental factors, such as temperature and nutrient levels, which can affect their reproduction. Moon jellyfish population growth factors.

Moon jellyfish reproduction can be affected by a variety of environmental factors, including temperature, salinity, nutrient availability, and food availability. Moon jellies are also capable of asexual reproduction, which allows them to reproduce quickly in ideal conditions. This can lead to population increases.

The population of moon jellies may have increased as a result of climate change. The warming of the oceans might have led to a surge in moon jellyfish numbers.

Since jellyfish have a simple structure, they are well adapted to live in warm water. A lack of natural predators, as well as pollution and overfishing, could have also contributed to the population growth of moon jellyfish.

However, more research is needed to determine the specific factors that caused the moon jelly population to increase. Warming oceans might have led to a surge in moon jellyfish numbers.

Moon jellyfish populations might be affected by the lack of natural predators, pollution, and overfishing. However, more research is needed to determine the specific factors that caused the moon jelly population to increase.

To know more about the jellyfish population refer here:

https://brainly.com/question/30219756#

#SPJ11

The end-products of glycolysis include Pyruvate, NADH, and ATP. Therefore, option C is the correct answer.

Glycolysis is the metabolic pathway that occurs in the cytoplasm of the cell, which plays a vital role in the energy production process. It is also known as the Embden-Meyerhof pathway, and it takes place in the absence of oxygen during cellular respiration.Glycolysis involves the breakdown of glucose into two three-carbon molecules called pyruvate. During the process, a net amount of two molecules of ATP, two molecules of NADH, and two molecules of pyruvate are produced.

The pyruvate is then transported to the mitochondria, where it is further broken down to generate more ATP molecules.

The overall reaction of Glycolysis is:

[tex]Glucose + 2 NAD^+ + 2 ADP + 2 Pi ⇒2 pyruvate + 2 ATP + 2 NADH + 2 H^+ + 2 H_2O[/tex]

Therefore, The end-products of Glycolysis include: Two molecules of Pyruvate. Two molecules of ATP (Adenosine Triphosphate) are produced. NADH (Nicotinamide Adenine Dinucleotide), which is a high-energy electron carrier, is also produced in glycolysis. hence c option is correct .

To know more about Glycolysis refer here :

https://brainly.com/question/30591040

#SPJ11

Greek numerical prefixes are used to indicate the number of atoms of a particular element present in a molecular compound. Four atoms of the same element will be named with the prefix "tetra-" while the prefix "di-" is used to indicate two atoms of the same element.

A prefix is a term added to the beginning of a word to alter its meaning. In chemistry, we often use prefixes to name molecular compounds. In particular, we use Greek numerical prefixes to indicate the number of atoms of a particular element present in a molecular compound.

Greek numerical prefixes are useful when naming complex molecular compounds because they provide an easy way to indicate how many atoms of a particular element are present in a compound. By using these prefixes, we can avoid writing out long chemical names that would be difficult to remember or pronounce.

Know more about Molecular compounds here :

https://brainly.com/question/26493942

#SPJ11

The solution contains 2.68 m (mol/L) of C2H5OH (ethanol) per 297 g (mL) of water. To calculate the amount of C2H5OH (ethanol) contained per 297 g of water, you need to use the molar mass of C2H5OH (ethanol). The molar mass of C2H5OH is 46 g/mol.

Therefore, the amount of C2H5OH (ethanol) contained in 297 g (mL) of water is:

2.68 m (mol/L) x 46 g/mol = 123.28 g/L (or 123.28 g/mL)

for more questions related to C2h5OH, refer here:

https://brainly.com/question/10642119#

#SPJ11

The molecular weight of the unknown weak acid is approximately 373.67 g/mol. To determine the molecular weight of the unknown weak acid, we'll first calculate the moles of NaOH used and then the moles of the acid, and finally use the given mass of the acid to find the molecular weight.

Follow these steps:
1. Convert the volume of NaOH to liters: 36.04 mL * (1 L / 1000 mL) = 0.03604 L
2. Calculate the moles of NaOH: moles = Molarity * Volume = 0.111 M * 0.03604 L = 0.00399844 mol
3. Since the NaOH and the weak acid react in a 1:1 ratio at the 2nd equivalence point, the moles of the weak acid will be equal to the moles of NaOH: moles of weak acid = 0.00399844 mol
4. Now, use the given mass of the weak acid (1.494 g) and the moles of the weak acid to calculate the molecular weight: Molecular weight = Mass / Moles = 1.494 g / 0.00399844 mol = 373.67 g/mol
Thus, the molecular weight of the unknown weak acid is approximately 373.67 g/mol.

for more such question on molecular weight

https://brainly.com/question/29442324

#SPJ11

The partial pressure (atm) of C₂H₂F₄, given that the total pressure of the sample is 1444 torr, is 0.399 atm

First, we shall convert 1444 torr to atm. Details below:

760 torr = 1 atm

Therefore,

1444 torr = 1444 / 760

1444 torr = 1.9 atm

Finally, we shall determine the partial pressure of C₂H₂F₄. This can be obtained as illustrated below:

Partial pressure of C₂H₂F₄ = (percentage of C₂H₂F₄ / total percent) × total pressure

Partial pressure of C₂H₂F₄ = (21 / 100) × 1.9

Partial pressure of C₂H₂F₄ = 0.399 atm

Thus, we can conclude that the partial pressure of C₂H₂F₄ is 0.399 atm

Learn more about partial pressure:

https://brainly.com/question/15577259

#SPJ1

Positive ions must shrink and have a stronger positive charge in order to increase the covalent nature of an ionic connection. Smaller ions can approach negatively charged ions, increasing their attraction and increasing the likelihood that electrons will be transferred.

The attraction between the two ions is increased by a stronger positive charge on the ion, increasing the likelihood that electrons will be transferred.

Negative ions must expand and have a stronger negative charge in order to increase the covalent nature of an ionic connection. The electrical attraction between the two ions is lessened as a result of larger ions putting more space between themselves and the positive ions.

It is more difficult for the electrons to be entirely transferred from one ion to the other when the ion has a higher negative charge, which leads to some degree of electron sharing between the two ions.

Positively charged ions and negatively charged ions can form ionic bonds, which are defined by the transfer of electrons from one ion to another.

These ionic bonds, however, can have a covalent nature, which means that the two ions share some electrons to some extent.

The sizes and charges of the ions involved have an impact on the covalent nature of an ionic bond.

A smaller size and a larger positive charge will increase the covalent nature of the binding when positive ions are present.

This is due to the fact that smaller ions are more attracted to one another since they can be brought closer to one another.

learn more about Ionic bonds here

https://brainly.com/question/13526463

#SPJ1

The color of the starch-iodine complex in Experiment 29: Rates of Chemical Reactions I is d. blue-black.

Experiment 29: Rates of Chemical Reactions I is one of the many experiments performed in a general chemistry laboratory that involves the determination of the rate of a chemical reaction experimentally. The experiment usually involves the reaction between sodium thiosulfate and hydrochloric acid that takes place in a beaker. This reaction causes the solution to become cloudy because of the formation of solid sulfur.

In this experiment, the reaction rate is measured using a stopwatch to time the duration of the reaction. The reaction rate is determined based on how long it takes for the solution to turn cloudy.The color of the starch-iodine complex in Experiment 29: Rates of Chemical Reactions I is blue-black.

Learn more about iodine at:

https://brainly.com/question/30031313

#SPJ11

The molarity of the NaOH solution when 39.99 g NaOH is dissolved in 0.2 L water is 4.999 M.

The molarity of the NaOH solution can be calculated using the formula

M = n/V,

where M is the molarity, n is the number of moles of solute, and V is the volume of the solution.

Here, we are given the mass of NaOH and the volume of the solution, so we need to first calculate the number of moles of NaOH present in the solution. The molar mass of NaOH is 40.00 g/mol (sodium: 22.99 g/mol, oxygen: 15.99 g/mol, hydrogen: 1.01 g/mol).

Thus, the number of moles of NaOH in 1 L of water is:

m = mass/molar mass = 39.99 g/40.00 g/mol = 0.9998 mol

NaOH has a molar mass of 40.00 g/mol.

The molarity of NaOH in the solution is:

Molarity (M) = n / V.0.9998 moles NaOH were dissolved in 1.0 L water.

Molarity = 0.9998 moles / 1.0 L = 0.9998 M

When 39.99 g NaOH was dissolved in 0.2 L water, the volume of the solution was less than the original volume. Thus, the molarity of the solution will be higher than 0.9998 M.

Let's calculate the moles of NaOH present in 39.99 g:

Mo = mass / molar mass = 39.99 g / 40.00 g/mol = 0.9998 mol

Molarity (M) = n / V.0.9998 moles NaOH were dissolved in 0.2 L water.

Molarity = 0.9998 moles / 0.2 L = 4.999 M

Therefore, the molarity of the NaOH solution when 39.99 g NaOH is dissolved in 0.2 L water is 4.999 M.

Learn more about molarity on:

https://brainly.com/question/14469428

#SPJ11

At a first-order disintegration rate, 0.973 grammes of 14C would decompose to 0.00132 grammes in roughly 28,400 years.

Radioactive decay is a first-order process, meaning the rate of decay of a radioactive material is proportional to the amount of that material present. The half-life of 14C is 5,730 years, which means that in that time, half of the original amount of 14C will have decayed.

To determine how long it would take for 0.973 grams of 14C to decay to 0.00132 grams, we need to use the formula for first-order decay:

N(t) = N₀ * e^(-kt)

where N(t) is the amount of material remaining at time t, N0 is the initial amount of material, k is the decay constant, and e is the base of the natural logarithm.

To find k, we can use the half-life equation:

t1/2 = ln(2)/k

Rearranging this equation, we get:

k = ln(2)/t1/2

Substituting the values for 14C, we get:

k = ln(2)/5730 years = 0.000120968 year⁻¹

Now we can use the first-order decay equation to find how long it would take for 0.973 grams of 14C to decay to 0.00132 grams:

0.00132 = 0.973 * e^(-0.000120968t)

Dividing both sides by 0.973 and taking the natural logarithm of both sides, we get:

ln(0.00132/0.973) = -0.000120968t

Solving for t, we get:

t = -ln(0.00132/0.973)/0.000120968 years

t ≈ 28,400 years

Therefore, it would take approximately 28,400 years for 0.973 grams of 14C to decay to 0.00132 grams at a first-order decay rate

To learn more about radioactive decay refer to:

brainly.com/question/1770619

#SPJ4

As we go down, it leads to weaker metallic bonding between the atoms. Weaker metallic bonding results in a lower melting point because it is easier to break the bonds between the atoms.

The melting point of a metal is inversely related to its atomic radius, i.e., as the atomic radius increases, the melting point decreases.

K belongs to Group 1 and Ba belongs to Group 2. As we go down these groups, the melting point decreases. Therefore, K will have a lower melting point than Na and Li, which are the elements above it in the group. The melting point of Na is about 370 K, and the melting point of Li is about 453 K. Therefore, the melting point of K is likely to be in the range of 336-370 K. Similarly, Ba will have a lower melting point than Ca and Mg, which are the elements above it in the group. The melting point of Ca is about 1115 K, and the melting point of Mg is about 923 K. Therefore, the melting point of Ba is likely to be in the range of 700-1115 K.

As we go from left to right in the fourth and fifth periods of the periodic table, the melting point generally increases. This is because the number of valence electrons increases, which leads to stronger metallic bonding and higher melting points.

Cd belongs to Group 12, V belongs to Group 5, and Co belongs to Group 9. As we go down Group 12, the melting point decreases, so Cd is likely to have a lower melting point than Zn, which is the element above it in the group. The melting point of Zn is about 693 K. Therefore, the melting point of Cd is likely to be in the range of 594-693 K. As we go from left to right in Group 5, the melting point generally increases. Therefore, V is likely to have a higher melting point than Ti, which is the element to its left. The melting point of Ti is about 1941 K. Therefore, the melting point of V is likely to be in the range of 1941-2183 K. As we go from left to right in Group 9, the melting point generally increases. Therefore, Co is likely to have a higher melting point than Ni, which is the element to its left. The melting point of Ni is about 1728 K. Therefore, the melting point of Co is likely to be in the range of 1728-1768 K.

To learn more about melting points please visit-
https://brainly.com/question/29578567
#SPJ1

Based on the given graph, the concentration of species A is plotted as a function of time. The slope of the graph represents the rate of reaction of A, which is changing as the reaction progresses. Therefore, the concentration of species A is plotted in the given graph.

The slope of a graph representing the change in concentration of a species over time in a chemical reaction represents the rate of reaction of that species.

Can we determine the concentrations of all the species in a chemical reaction based on a graph of the change in concentration of one species over time?

No, we cannot determine the concentrations of all the species in a chemical reaction based on a graph of the change in concentration of one species over time.

To know more about Graph, visit:

https://brainly.com/question/17267403

#SPJ1

The polystyrene that was made was a white, semi-transparent solid material.

polystyrene had a smooth texture and was lightweight, yet rigid. It was easily cut and shaped into various forms.The glyptal resin was a slightly yellowish, transparent liquid. It had a thick consistency, similar to that of honey or syrup.The properties of glyptal are quite different from those of polystyrene. Glyptal is much more malleable and can be used to form various shapes and forms. It is also much more heat resistant than polystyrene, and is ideal for use in applications which require the material to withstand high temperatures. On the other hand, polystyrene is much lighter and more rigid, making it ideal for creating objects with precise shapes and dimensions.

learn more about polystyrene Refer:brainly.com/question/20740898

#SPJ1

Strong acids all have the same strength, and the conjugate base of a strong acid exhibits little acid-base characteristics.

The correct option is A and B.

The conjugate base's equation is the acid's formula fewer one hydrogen. The reacting base transforms into its conjugate acid. The base's formula is the conjugate acid's formula plus one additional hydrogen ion.

A conjugate acid-base pair, according to the Brnsted-Lowry definition of acid and base, consists of two substances that seem to be distinct only in that they contain a proton (H+). When a proton is supplied to a base, a conjugate acid is created, and vice versa when a proton is taken away from an acid, a corresponding base is created.

To know more about Conjugate base visit:

https://brainly.com/question/30225100

#SPJ1

The complete question is -

Which of the following statements about strong acids are true?

Select all that apply:

A-The conjugate base of a strong acid has negligible acid-base properties.

B-All strong acids have the same strength.

C-They produce stable ions that have little tendency to accept a proton.

D-They raise the ph of a solution by increasing the concentration of hydronium.

Answer:

The correct statements are: The conjugate base of a strong acid has negligible acid-base properties and they produce stable ions that have little tendency to accept a proton.

Explanation:

Strong acids are acidic compounds that undergo complete ionization in water, raising the concentration of hydronium and lowering the pH of the solution. The leveling effect describes how strong acids may appear to be of equal strength in water, but in a stronger acid such as glacial acetic acid, their true relative strength can be determined.

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

When a soluble salt is present in which the absolute value of the heat of hydration is less than that of the value of the lattice enthalpy, the signs of standard Gibbs energy, enthalpy, and entropy of precipitation would be positive, zero, and negative respectively.

Entropy is a thermodynamic property which is defined as the measure of the degree of randomness present in a system. It is represented by "S". Specifically, it describes the number of possible arrangements of a system that are consistent with its macroscopic state functions (e.g. pressure, temperature and volume). Greater the number of possible arrangements, the higher the entropy.

Changes in temperature, pressure, and the number and types of particles present in a system affects the entropy. By increasing the temperature or addition of particles to a system increases entropy, while on decreasing the temperature or decreasing the number of particles decreases entropy.

In a soluble salt, when absolute value of heat of hydration is less than absolute value of lattice enthalpy then the signs of standard gibbs energy, enthalpy and entropy of precipitation are positive, zero and negative respectively.

To know more about entropy here

https://brainly.com/question/31057236

#SPJ4