What Volumes Should You Expect For Fraction 1 2 And 3 For Fractional Distillation?

Answer:

E....H+

Explanation:

coz when hydrogen ions are formed they automatically join to form hydrogen

Answer:

If you can identify the species that was being oxidized, its species that contains the element on the other side is the reducing agent.

For example, in the equation Zn + Cu2+ --> Zn2+ + Cu, the zinc was oxidized, making Zn the reducing agent.

Answer:

2H2O have water = 2×2=4moles.

Explanation:

(⁠◕⁠ᴗ⁠◕⁠✿⁠)(⁠◕⁠ᴗ⁠◕⁠✿⁠)(⁠◕⁠ᴗ⁠◕⁠✿⁠)

In this reaction, the Iron oxide is reduced, and Carbon is the reducing agent. Hence, option C) Iron oxide is reduced is the correct answer.

The given reaction is written as follows: Iron oxide + Carbon → Iron + Carbon dioxide.The given options are:A) Carbon is reducedB) Iron oxide is neutralizedC) Iron oxide is reducedD) Iron is oxidizedThe correct option is C) Iron oxide is reduced.How is Iron extracted from Iron oxide?Iron is extracted from Iron oxide through reduction. A reducing agent is used to reduce Iron oxide to Iron. The most commonly used reducing agent is Carbon, which helps to convert Iron oxide to Iron. During the process of reduction, Carbon is oxidized to Carbon dioxide. The overall chemical reaction can be represented as follows:Fe2O3(s) + 3C(s) → 2Fe(s) + 3CO(g)The given reaction shows that Iron oxide is reduced to Iron, while Carbon is oxidized to Carbon dioxide.In this reaction, Iron oxide undergoes a reduction process because its oxidation state decreases, while Carbon undergoes an oxidation process because its oxidation state increases.

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Explanation:

A mixture is an impure substances with the following properties:

Examples are air, sea - water, muddy water, palm -wine, petroleum, alloys etc.

Using this description it should be easy to identify a mixture.  

Answer: A.  The compound CuCl is 500 times less soluble in sea water than it is in pure water.

pure water.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in a equilibrium reaction, the equilibrium will shift in a direction so as to minimize the effect.

Thus when a common ion is introduced to an equilibrium reaction, the equilibrium will shift in a direction where the concentration of common ion is decreasing.

\(CuCl\rightleftharpoons Cu^++Cl^-\)

\(NaCl\rightarrow Na^++Cl^-\)

When common ion such as \(Cl^-\) from NaCl in sea water is introduced to an equilibrium reaction, the equilibrium will shift in a direction where the concentration of common ion is decreasing i.e. in the left side and thus solubility of CuCl further decreases.

The volume of carbon dioxide gas produced will be 23.3mL

SrCO (s) + 2HCl(aq) → SrCl₂(aq) + CO₂(g) + H₂O(l)

Here concentration of the strontium carbonate is in excess and the concentration of HCl is 25mL having molarity 0.1072 M

Number of moles of HCl= mass/ molar mass,

Molar mass of HCl= mass/ Number of moles

Molar mass of HCl= 36.5

Mass of HCl from balanced equation= 2×36.5=73

Molarity= Number of moles/ volume

According to stoichiometry the moles of HCl is 2 and that of  CO₂ is 1.

We know that,

PV =nRT

1.05× V= 1 ×0.0821× 298

V= 0.0821×298/ 1.05

= 23.3 mL

By ideal gas equation, volume of carbon dioxide is calculated as 23.3 mL.

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The given question is incomplete. The complete question is:

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na+(aq) + Cl −(aq) Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

Answer: The entropy change is positive. The free energy change for the process is negative and reaction is spontaneous.

Explanation:

Entropy is defined as the degree of randomness of a system. For a system in which randomness increses , the enetropy is said to increase and \(\Delta S\) is positive.

As in the given reaction : \(NaCl(s)\rightarrow Na^+(aq)+Cl^-(aq)\) , the solid is dissociating to give ions , randomness increases and thus entropy is positive.

Also the dissociation of a molecule requires energy , thus the enthalpy \(\Delta H\) is also positive as heat is absorbed by the system.

\(\Delta G=\Delta H-T\Delta S\)

\(\Delta G=(+ve)-T(+ve)\)

\(\Delta G=-ve\) when Temperature is high.

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na+(aq) + Cl −(aq)

Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

The given question is incomplete. The complete question is:

Consider the spontaneous dissolution of NaCl in water: NaCl(s) → Na(aq)  Cl −(aq) Predict whether the entropy change for this process is positive or negative and explain your answer. Then, predict whether the free energy change for the process is positive or negative and explain your answer.

Answer: The entropy change is positive. The free energy change for the process is negative and reaction is spontaneous.

Explanation:

Entropy is defined as the degree of randomness of a system. For a system in which randomness increses , the enetropy is said to increase and  is positive.

As in the given reaction :  , the solid is dissociating to give ions , randomness increases and thus entropy is positive.

Also the dissociation of a molecule requires energy , thus the enthalpy  is also positive as heat is absorbed by the system.

when Temperature is high.

Which of these ideas did you include in your answer?

Have a Nice Day .

Felting is a physical procedure. The mixture of the given solid and the liquid can be separated using filter paper in this process, for example, sand and water can be separated using filter paper.

Filtration is the process of removing solid particles from a liquid or gaseous fluid by using a filter medium that allows the fluid to pass through but retains the solid particles. The desired product could be either the clarified fluid or the solid particles removed from the fluid.

Separating sand from water is a physical process rather than a chemical one. Sand and water are a mixture that can be easily separated without the use of any chemicals. Sand can be filtered out of the water with a sieve and then dried to allow any remaining water to evaporate.

Thus,Water and sand are being separated by filtration.Felting  is used as a physical change.

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it's most abundant in the mid latitudes.

The Lewis structure for the carbonate ion (CO32-) can be drawn by first identifying the valence electrons of each atom and arranging them to form bonds and fulfil the octet rule. Carbon has 4 valence electrons, while each oxygen atom has 6. This gives a total of 22 valence electrons for CO32-.

To begin, we can place a single bond between each oxygen atom and the carbon atom. This uses up 6 electrons (2 from each bond), leaving 16 remaining. We can then place two lone pairs on each oxygen atom, which uses up an additional 12 electrons (6 from each pair), leaving 4 remaining. These remaining electrons can be placed as a lone pair on the central carbon atom. This gives us the following Lewis structure for the carbonate ion:

   O
  //
 O C
  \\
   O-
However, this is not the only way that the electrons can be arranged in the molecule. There are actually two equivalent resonance structures that can be drawn for CO32-. To draw these, we can move one of the lone pairs from an oxygen atom to form a double bond with the adjacent oxygen atom. This gives us the following structures:

   O-              O
  /               ||
 O C   <-->   O=C=O
  \\              ||
   O              O-

Both of these structures are equivalent in terms of their overall electronic structure. They are also important for understanding the bonding in the carbonate ion, as the true structure of the molecule is likely a combination of these resonance structures.

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There are no forces of attraction between the particles.

The kinetic energy of the molecule is greater than the attractive force between them, thus they are much farther apart and move freely from each other. In most cases, there are essentially no attractive forces between particles. This means that gas has nothing to hold a specific shape or volume.

In the physical sciences, a particle (or corpuscle in older texts) is a small localized object to which can be ascribed several physical or chemical properties, such as volume, density, or mass. They vary greatly in size or quantity, from subatomic particles like the electron to microscopic particles like atoms and molecules, to microscopic particles like powders and other granular materials. Particles can also be used to create scientific models of even larger objects depending on their density, such as humans moving in a crowd or celestial bodies in motion.

The term particle is rather general in meaning and is refined as needed by various scientific fields. Anything that is composed of particles may be referred to as particulate. However, the noun particulate is most frequently used to refer to pollutants in the Earth's atmosphere, which are a suspension of unconnected particles, rather than a connected particle aggregation.

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Answer:

friction and air resistance

at terminal velocity, the weight of the object due to gravity is balanced by the frictional forces, and the resultant force is zero.

Answer:

protons, neutrons, negatively, electrons

Explanation:

protons are positive, neutrons are neutral. the entire basis of bonding is chemistry is the distribution of electrons, which are negatively charged particles surrounding the nucleus.

Answer:

= 100u. Hence 10 g = 0.1 mole. Hope it's helpful to u

For the elementary reaction NO3 + CO ❝ NO2 + CO2 the molecularity of the reaction and the rate law is 2 and k[NO3][CO] respectively. Therefore, the correct option is A) 2, k[NO3][CO]

The quantity of responding molecules that collide simultaneously to produce a chemical reaction is known as the molecularity of a reaction. A chemical reaction's rate and the concentrations of the reactants involved are correlated by an expression known as the rate law, commonly referred to as the rate equation.

The molecularity of the reaction is 2 because there are two reactant molecules involved in the elementary reaction.

The rate law is rate = k[NO3][CO] because the rate of the reaction depends on the concentration of both reactants. Therefore, the correct answer is A) 2, k[NO3][CO].

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Answer:

A neutralized solution in chemistry refers to the reaction between an acid and base that results in a neutral balance, or a measure of 7 on the pH scale.

Explanation:

Aat 25 °C, the number of dissociated H+ ions there are in 325 ml of an aqueous solution whose pH is 11.41 is 1.235 × 10⁻¹².

The pH scale is a logarithmic measure of the acidity or basicity of an aqueous solution. The pH scale ranges from 0 to 14, with 7 being neutral, below 7 being acidic, and above 7 being basic or alkaline. Therefore, we can use the relationship between pH and [H+] concentration to calculate the number of dissociated H+ ions in an aqueous solution. The relationship is as follows:

pH = -log[H+]

or [H+] = 10^-pH

We can use this relationship to find the number of dissociated H+ ions in 325 mL of an aqueous solution whose pH is 11.41 as follows:

First, we need to find the [H+] concentration from the given pH:

[H+] = 10^-pH = 10^-11.41 = 3.80 × 10⁻¹² M

Now that we know the [H+] concentration, we can calculate the number of dissociated H+ ions using the following formula:

Number of dissociated H+ ions = [H+] × volume of solution in Liters

The volume of the solution is given in milliliters (mL), so we need to convert it to liters (L):

325 mL = 325/1000 L = 0.325 L

Now we can use the formula above to find the number of dissociated H+ ions:

Number of dissociated H+ ions = [H+] × volume of solution in Liters = 3.80 × 10⁻¹² M × 0.325 L = 1.235 × 10⁻¹² mol

The answer is: 1.235 × 10⁻¹² dissociated H+ ions.

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The boiling point of the sucrose solution would be 3.68 °C compared to the boiling point of pure water.

The boiling point of a solution depends on the concentration of solute particles in the solution, which affects the colligative properties of the solution, such as boiling point elevation.

To calculate the boiling point elevation, we can use the following formula;

ΔTb = Kbm

where ΔTb is the boiling point elevation, Kb is the molal boiling point constant for water (which is a constant value), and bm is the molality of the solution, which is the amount of solute (in moles) per kilogram of solvent.

First, let's calculate the molality of the solution;

moles of sucrose = mass of sucrose / molar mass of sucrose

moles of sucrose = 739 g / 342.3 g/mol (molar mass of sucrose)

Next, let's convert the mass of water to kilograms:

mass of water = 0.300 kg

Now, we can calculate the molality of the solution;

bm = moles of sucrose / mass of water

Plugging in the values;

moles of sucrose = 739 g / 342.3 g/mol ≈ 2.158 mol

mass of water = 0.300 kg

bm = 2.158 mol / 0.300 kg ≈ 7.193 mol/kg

Next, we need to determine the molal boiling point constant (Kb) for water. The molal boiling point constant for water is approximately 0.512 °C kg/mol.

Finally, we can calculate the boiling point elevation;

ΔTb = Kb × bm

ΔTb = 0.512 °C kg/mol × 7.193 mol/kg

≈ 3.68 °C

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Answer:

He concluded that atoms contain small negatively charged particles that are called electrons.

There are approximately 5.621 x 10^24 lithium atoms in 9.35 moles of lithium.

To determine the number of atoms in 9.35 moles of lithium, we can use Avogadro's number, which is the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

First, we need to calculate the total number of lithium atoms in 9.35 moles of lithium:

Number of lithium atoms = (9.35 mol) x (6.022 x 10^23 atoms/mol)

Number of lithium atoms = 5.621 x 10^24 atoms

In chemistry, a mole is a unit of measurement used to express the amount of a substance. One mole of a substance is defined as the amount of the substance that contains the same number of particles as there are atoms in 12 grams of pure carbon-12. This number is known as Avogadro's number and is approximately 6.022 x 10^23 particles per mole.

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Answer:

A

Explanation:

The lake water will have a lower pH which will damage the plants and animals living in the water is the impact the acid rain will have on the lake and is denoted as option D.

This is the type of rain which has acidic properties due to the increase in the number of hydrogen ions and is common in industrial areas where chemicals are used for their operation.

This type of rain have different effects on water bodies such as lakes such that the lowering of the pH leads to the damage of the plants and animals living in the water.

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Answer: water

Explanation: 123

The percentage of copper that would be calculated would be 0.002 g lower than it should have been. This error would not change the empirical formula reported, as the error is a result of an incorrect mass measurement and not incorrect chemical formula or other factors of the empirical formula.

The definition of an empirical formula for a compound is one that displays the ratio of the elements present in the compound but not the precise number of atoms in the molecule. Subscripts are used next to the element symbols to indicate the ratios. The subscripts in the empirical formula, which represent the ratio of the elements, are the smallest whole numbers, making it also known as the simplest formula.

1) Start by listing the gram of each element, which you often find in an experiment or are required to provide in a question.

2)To make the computation easier, assume the entire mass of a sample is 100 gram, so you can work with simple percentages. Set the mass of each element to the percent, in other words. The total should be 100 percent.

3) You may convert the mass of each element in the periodic table into moles by multiplying its atomic weight by its molar mass.

4)Multiply each mole value by the few moles you determined through computation.

5) To the nearest whole number, round each number you receive.

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The pH of the buffer solution containing 0.18 M H₂CO₃ and 0.25 M NaHCO₃ is approximately 6.513.

To calculate the pH of the buffer solution, we can use the Henderson-Hasselbalch equation;

pH = pKa + log([A⁻]/[HA])

In this case, H₂CO₃ acts as a weak acid (HA) and its conjugate base, HCO₃⁻, acts as the salt (A⁻).

Given; [H₂CO₃] = 0.18 M

[HCO₃⁻] = 0.25 M

pKa = -log(Ka) = -log(4.3 × 10⁻⁷)

Let's substitute the values into the Henderson-Hasselbalch equation and calculate the pH;

pH = (-log(4.3 × 10⁻⁷) + log(0.25/0.18)

pH = (-(-6.37)) + log(1.39)

pH = 6.37 + 0.143

pH = 6.513

Therefore, the pH of the buffer solution will be 6.513.

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Answer: Copper is purified by electrolysis . Electricity is passed through solutions containing copper compounds, such as copper(II) sulfate. The anode (positive electrode ) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode.