The principle 'like dissolves like' is used to determine the solubility of compounds in CCl₄. These are more likely to dissolve: Br₂ over NaBr, C₆H₁₁OH over CH₃OH, CS₂ over KOH, and I₂ over CaF₂.
Explanation:The solubility of compounds in CCl₄ can be calculated using the principle 'like dissolves like', which means that substances with similar types of molecular interactions dissolve in each other. Therefore, compounds with similar polarity will dissolve in each other.
a) Br₂ vs NaBr: Br₂, being nonpolar like CCl₄, is expected to be more soluble. NaBr is an ionic compound, and hence it won't dissolve well.b) CH₃OH vs C₆H₁₁OH: Both are alcohols but CH₃OH contains polarity due to the presence of O-H bonds whereas C6H11OH is less polar. Therefore, C6H11OH would be more soluble in CCl₄.c) CS₂ vs KOH: CS₂ is a nonpolar compound like CCl₄, hence it is expected to be more soluble. KOH is ionic and wouldn't dissolve well.d) I₂ vs CaF₂: I₂ is nonpolar and would therefore be more soluble in CCl₄. CaF₂ is ionic and wouldn't dissolve well.Learn more about Solubility here:https://brainly.com/question/28170449
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Final answer:
The more soluble compounds in carbon tetrachloride (CCl₄) are those that are non-polar: Br₂, C₆H₁₁OH, CS₂, and I₂, because CCl₄ is a non-polar solvent and 'like dissolves like'.
Explanation:
The question asks which compound in each pair is likely to be more soluble in carbon tetrachloride (CCl₄). Solubility often depends on the similarity principle 'like dissolves like', meaning that polar solvents dissolve polar substances, and non-polar solvents dissolve non-polar substances.
a) Br₂ or NaBr: Br₂ (bromine) is a non-polar molecule, while NaBr (sodium bromide) is an ionic compound. Br₂ will be more soluble in CCl₄ since both are non-polar.
b) CH₃OH or C₆H₁₁OH: C₆H₁₁OH (cyclohexanol) is less polar and has a longer non-polar hydrocarbon chain compared to CH₃OH (methanol). Thus, C₆H₁₁OH will be more soluble in CCl₄.
c) CS₂ or KOH: CS₂ (carbon disulfide) is a non-polar molecule, while KOH (potassium hydroxide) is an ionic and polar compound. CS₂ will be more soluble in CCl4.
d) I2 or CaF₂: I₂ (iodine) is a non-polar molecule, while CaF₂ (calcium fluoride) is an ionic compound. I2 will be more soluble in CCl₄.
Predict the products of the following reaction: Ba+P The equation may not be correctly balanced. Express your answers as chemical formulas separated by a comma. If no reaction occurs, enter noreaction.
Which is the electron configuration for bromine?
Electron configuration:
The arrangement of electrons in an atom by a superscript, in each sublevel is known as electron configuration. For example the d block elements have (n-1)d1-10 ns1-2 electronic configuration
The atomic number if bromine is 35 thus there are 35 electrons present which fill accorindg to the Hund’s rule and aufbau principle a follows:
Br-35 1s22s22p63s23p64s23d104p5
Or [Ar] 4s23d104p5
A student balanced the chemical equation Mg + O2 →MgO by writing Mg + O2 → MgO2. Was the equation balanced correctly? Explain your answer. If the equation was not balanced correctly, write the correctly balanced equation.
Explanation:
Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.
As a result, formula of magnesium oxide is MgO and not [tex]MgO_{2}[/tex].
The student write the equation as [tex]Mg + O_2 \rightarrow MgO_2[/tex], it is not correct.
Therefore, given equation will be balanced as follows.
[tex]2Mg + O_{2} \rightarrow 2MgO[/tex]
Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.
No, the equation [tex]Mg + O2 -- MgO2[/tex]is not balanced correctly. The correct balanced equation is
[tex]2Mg + O2 -- 2MgO.[/tex]
Explanation:A balanced chemical equation is a symbolic representation of a chemical reaction that ensures the conservation of mass and charge. It shows the reactants on the left side and the products on the right side, with coefficients indicating the relative quantities of substances involved to satisfy the law of conservation of matter.
The given chemical equation is not balanced correctly. To balance this equation, we need to ensure that there is an equal number of each element on both the reactant and product sides. In the unbalanced equation, there is one magnesium atom on the reactant side and two oxygen atoms on the product side. To balance it, we need to put a coefficient of 2 in front of MgO, resulting in the balanced equation: [tex]2Mg + O2 -- 2MgO.[/tex]
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When a material in the liquid state is vaporized and then condensed to a liquid, the steps in the process are, respectively,?
When a material in the liquid state is vaporized and then condensed to a liquid, the steps in the process are [tex]\boxed{{\text{endothermic}}}[/tex] and [tex]\boxed{{\text{exothermic}}}[/tex] respectively.
Further Explanation:
Changes are of two types:
(A) Physical changes:
It is the process in which the physical properties of the system are affected. These changes can also be reversed by physical methods. In these kinds of changes, the molecular composition of the substance remains the same. These are reversible in nature and no new substances are formed. For example, boiling of water, chopping of wood, melting of wax are physical changes.
(B) Chemical changes:
In this change, new substances are formed by the chemical combination of the previous substances. The chemical properties of substance change when it undergoes a chemical change. These are irreversible in nature. For example, fermentation of grapes, burning of wood, rusting of iron are chemical changes.
Condensation: It is the process when vapors are converted to the liquid state.
Evaporation: It is the process in which liquid is converted into vapors.
Endothermic reactions are those in which more energy needs to be supplied to the system than that released by it.
Exothermic reactions are those in which more energy is released by the system than that supplied to it.
In the first step, the liquid is vaporized. The intermolecular forces in liquid state are to be broken down and energy is supplied for the purpose. Hence it is an endothermic process.
In the second step, the gas is condensed. The intermolecular forces in the gas are weaker than that in liquid state and energy is released during the conversion of gas to liquid. Hence it is an exothermic process.
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1. Which of these is an extensive property? https://brainly.com/question/1398514
2. Which of the phase changes is an exothermic change? https://brainly.com/question/1875234
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Physical and chemical changes
Keywords: physical change, chemical change, liquid, gas, evaporation, condensation, endothermic, exothermic, intermolecular forces.
A chemist dissolved crystals of an unknown substance into water at room temperature. He found that 33 g of the substance can be dissolved into 100 mL of water. What property of the unknown substance was the chemist most likely investigating?
Answer:
Solubility.
Explanation:
When a chemist is dissolving crystal of unknown substance it means the chemist is checking the solubility of substance in the water.
As the chemist not measuring the temperature so he is not determining anything related to enthalpy, boiling point, melting point etc.
When we dissolve a particular amount of substance (to form saturated solution) in a particular volume of solvent it means we are checking it solubility.
what particles in an,atom determine an elements atomic number and identity?
6. How is the number of neutrons in the nucleus of an atom calculated?
Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass
Answer:
It is Henry Moseley
Explanation:
Determine the number of neutrons in an atom of Rg-272.
Explanation:
Roentgenium is a radiactive element which is represented by symbol Rg. Atomic number of Rg is 111 and its atomic mass is 272.
It is known that atomic number is the number of protons present in an atom. Whereas atomic mass is the sum of total number of protons and neutrons present in an atom.
That is, Atomic mass = no. of protons + no. of neutrons
272 = 111 + no. of neutrons
no. of neutrons = 272 - 111
= 161
Thus, we can conclude that there are 161 neutrons present in Rg-272.
What change or changes in the state of a gas bring about each of the following effects? a. the number of impacts per unit time on a given container wall increases. b. The average energy of impact of molecules with the wall of the container decreases c. The average distance between gas molecules increases d. The average speed of molecules in the gas mixture is increased
The impacts per unit time on a wall increase with rising temperature or particle number, the energy of impacts decreases when temperature falls, the distance between particles increases with growing volume, and the molecule speed increases with rising temperature.
Explanation:The changes in the state of a gas that could bring about the effects listed are closely related to the principles established by Amontons's law, Charles's law and Boyle's law.
The number of impacts per unit time on a given container wall increases if the temperature or the number of gas particles is increased. This is due to a rise in the average speed of the particles, resulting in more frequent collisions as per Amontons's law. The average energy of molecular impacts on the container walls decreases when the temperature is decreased, since molecular kinetic energy is directly proportional to temperature. The average distance between gas particles increases when the volume occupied by the gas increases, assuming constant temperature and number of gas particles. This is in accordance with Charles's law. The average speed of gas particles increases when the temperature is increased, resulting in a higher average kinetic energy of the molecules due to the direct proportionality between kinetic energy and temperature. This follows Amontons's law. Learn more about Gas Laws here:
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which of the following is a product formed whrb NO2 and H2O react together A O2 B HNO3 C H2 D P(OH)2
Answer : The correct option is, (B) [tex]HNO_3[/tex]
Explanation :
Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.
The balanced chemical reaction will be,
[tex]3NO_2+H_2O\rightarrow 2HNO_3+NO[/tex]
By the stoichiometry, we can say that 2 moles of [tex]NO_2[/tex] react with 1 mole of [tex]H_2O[/tex] to give 1 moles of [tex]HNO_3[/tex] and 1 mole of [tex]NO[/tex].
In this reaction, [tex]NO_2[/tex] and [tex]H_2O[/tex] are the reactants and [tex]HNO_3[/tex] and [tex]NO[/tex] are the products.
Hence, the correct option is, (B) [tex]HNO_3[/tex]
Which statement is correct about honey?
It contains disaccharides, a complex type of lipid.
It contains monosaccharides, the simplest carbohydrate.
It contains starch, which gives it a sweet taste.
It contains lipids, which give it a sweet taste.
The correct statement about the honey is It contains monosaccharides, the simplest carbohydrate.
Hence, Option (2) is correct answer.
What is Carbohydrate ?Carbohydrate are the sugar molecules. It is the main nutrient in food and drinks.
Now lets check all statement one by one:
Option (1): It contains disaccharides, a complex type of lipid.
Disaccharides are the type of sugar which is formed when the two monosaccharides are joined by linkage that is Glycosidic linkage.
So it is incorrect statement.
Option (2): It contains monosaccharides, the simplest carbohydrate.
Honey is made up of simple sugars that is glucose and fructose is known as monosaccharides.
So it is correct statement.
Option (3): It contains starch, which gives it a sweet taste.
It contains glucose which gives honey a sweet taste.
So it is incorrect statement.
Option (4): It contains lipids, which give it a sweet taste.
Honey contains the simple sugars which give the honey sweet taste.
So it is incorrect statement.
Thus, from above conclusion we can say that The correct statement about the honey is It contains monosaccharides, the simplest carbohydrate.
Hence, Option (2) is correct answer.
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Putting a balloon in the freezer is one way to demonstrat what?
How many valence electrons do noble gases have?
1 or 2
2 or 8
2 or 3
8
A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?
A compound contains 38.7% K, 13.9% N, and 47.4% O by mass. What is the empirical formula of the compound?
The empirical formula for the compound is KNO3.
What is the empirical formula?
We first came up with two significant sorts of chemical formulas: molecular formula and empirical formula, by calculating the masses of all the constituent atoms that combine to create a molecule.
While the molecular formula provides the precise quantity of each unique element present in a molecule, 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. The empirical formula is multiplied by the widely used molecular formula.
The overall correlation between the empirical formula and the molecular formula is
Molecular Formula = n × Empirical Formula
Thus,
K : 38.7 g / 39.1 g/mol = 0.99N : 13.9 g / 14.0 g/mol = 0.99O : 47.4 g / 16.0 g/mol = 2.96
Dividing by the smallest:
K : 0.99 / 0.99 = 1N : 0.99 / 0.99 = 1O : 2.96 / 0.99 = 3
Therefore the formula for the compound is KNO3.
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what's the name for the phase change from solid to gas
If solid NaCl is added to a saturated water solution of PbCl2 at 20o C, a precipitate is formed. How would this affect the value of the Ksp for [Pb2+][Cl-] in solution?
a) The Ksp increases.
b)The Ksp decreases.
c) The Ksp remains the same.
d) none of the above. ...?
Answer:
c) The Ksp remains the same.
Explanation:
The solubility product constant, Ksp is essentially an equilibrium constant which represents the extent to which a solute dissolves in a solvent.
In the given situation, the PbCl2 equilibrium can be represented as:
[tex]PbCl_{2}(s)\rightleftharpoons Pb^{2+}(aq)+2Cl^{-}(aq)[/tex]
[tex]Ksp = [Pb^{2+}][Cl^{-}]^{2}[/tex]
Addition of NaCl will introduce a common ion i.e. Cl-. This would increase its concentration and solubility. This will change the reaction quotient. However, the value of Ksp which is the 'equilibrium constant' will reamin unaffected since it is a constant at a given temperature.
which of the following elements is chemically most similar to chlorine? A) helium b) sodium c) bromine d) hydrogen
Answer:
bromine
Explanation:
Any element with 7 electrons in the outermost shell will have similar properties. Thus other elements in the same column of the periodic table as chlorine will have similar properties. Elements in this column form what is called the Halogen series, which is composed of fluorine, chlorine, bromine, iodine, and astatine.
Phase changes are chemical changes.
True
False ...?
Will magnesium oxidize zinc?
Final answer:
Magnesium has a greater tendency to be oxidized than zinc, so magnesium will not oxidize zinc. The activity series explains that magnesium is more active and readily loses electrons compared to zinc, leading to its oxidation in the presence of zinc ions.
Explanation:
No, magnesium will not oxidize zinc. Instead, the opposite is true because magnesium has a greater tendency to be oxidized than zinc, according to the activity series. The activity series ranks metals based on their ease of oxidation, with the metals at the top being the most active and hence more likely to lose electrons and be oxidized. Alkali metals, alkaline earth metals, and aluminum are at the top of this series, while metals like copper, gold, and silver are at the bottom. Since magnesium is higher in the activity series than zinc, it is more likely that magnesium will give up electrons to zinc ions, reducing the zinc ions to zinc metal and oxidizing the magnesium to magnesium ions.
Magnesium, when exposed to air, forms a passivation layer of magnesium oxycarbonate due to the reaction with carbon dioxide, which decreases its reactivity after initial exposure, but this does not affect its position in the activity series relative to zinc.
Using the example provided,
Mg(s) + Zn²⁻ (aq) → Mg²⁻(aq) + Zn(s)
This demonstrates that magnesium, not zinc, will be oxidized in a reaction between magnesium metal and zinc ions.
Magnesium has a greater tendency to oxidize compared to zinc, which can be understood with the help of the activity series of metals. In a reaction between magnesium and zinc, magnesium will be oxidized, while zinc will be reduced.
Explanation:Will magnesium oxidize zinc? To answer this question, we need to refer to the activity series of metals, which is a list that ranks metals according to their relative reactivity. Specifically, it orders metals by their tendency to be oxidized. Magnesium is more reactive than zinc, according to the activity series, and thus has a greater tendency to be oxidized.
Looking at the pairing of metals, when magnesium (Mg) and zinc (Zn) are considered, the reaction is as follows:
Mg(s) + Zn²⁺(aq) → Mg²⁺(aq) + Zn(s)
This equation indicates that magnesium metal will react with zinc ions, leading to the oxidation of magnesium and the reduction of zinc. Therefore, in a reaction where both magnesium and zinc are present, magnesium will be the one to oxidize, not zinc. This is because zinc is less active and has a lesser tendency to lose electrons compared to magnesium.
Quarks are thought to be the building blocks of protons. Which was most affected by the discovery of the quark?
A the estimated mass of a proton
B the observation that protons have a +1 charge
C the view that the atom cannot be broken down further than protons
D the theory that the nucleus of an atom contains protons and neutrons
Answer:
C. the view that the atom cannot be broken down further than protons
Explanation:
Atom is considered as the smallest unit of matter. An atom contains protons and neutrons in the nucleus and electrons orbiting the nucleus in fixed energy shells.
It was thought that atom cannot be broken down further than these particles until quarks were discovered. A proton contains three quarks- 2 up quarks and 1 down quark.
Why do amorphous solids not have a long-range order in the arrangement of their particles?
Their formation involves very rapid cooling.
They do not have enough particles.
Their particles eventually change positions.
Their particles always stay in the same positions.
Answer:
I think A is right
Explanation:
TRUE or FALSE. The particles of a gas are packed closely together and don't have as much movement as the particles of a solid or liquid.
Which of the following is an SI base unit for measuring length?
Explanation:
the answer is kelvin
when a wave hits a surface through which it cannot pass and bounces back it undergoes?
What is the total pressure on the gas after the 760 mm Hg has been added?
FIRST PHASE atmospheric pressure= 760 torr gas volume= 60 mL (760 mm Hg added to 2nd phase) SECOND PHASE atmospheric pressure= 760 torr Gas volume= 30 mL **image looks like a J. in the 2nd phase, there is 760 mm that is half of the J** if that makes any sense.
I am confused on how you solve the problem considering the torr and ml and mm and mmHg
Answer:
1520 torr = 1520mmHg = 2 atm.
Explanation:
Please note that it is just basic conversion.
1 torr = 1mmHg
1 atm = 760mmHg = 760 torr
As per the question,
FIRST PHASE:
760 torr pressure is applied which gave = 60mL volume to gas.
SECOND PHASE:
760mmHg pressure is applied which gave = 30mL volume to gas
Since we know that 1mmHg = 1 torr.
Therefore, total gas pressure = 760 + 760 = 1520 torr OR 1520mmHg
What did Ernest Rutherford’s gold foil experiment demonstrate about atoms? Their positive charge is located in a small region that is called the nucleus. Their negative charge is located in small particles that are called electrons. Their nucleus makes up the majority of the volume of the atom.
Their electrons are floating in a sea of positive charges.
Ernest Rutherford's gold foil experiment discovered that atoms have a dense central nucleus with positive charge, surrounded by low-mass electrons in mostly empty space, leading to the nuclear model of the atom.
Ernest Rutherford's gold foil experiment demonstrated that atoms have a small, dense nucleus where most of the mass and the positive charge is concentrated. This experiment, which bombarded a thin sheet of gold with alpha particles, showed that while most of these alpha particles passed through the gold foil, a small fraction were deflected, and an even smaller number bounced back. This was a result of the alpha particles colliding with something dense and positively charged, leading Rutherford to propose the nuclear model of the atom. This model shows that the majority of the atom is empty space and that the negatively charged electrons orbit this central nucleus.
Rutherford's findings refuted the then-prevailing Thomson model, also known as the plum pudding model, which imagined electrons embedded within a positively charged 'paste' that filled the entire volume of the atom. Instead, his results indicated that the nucleus of the atom is tiny in volume but contains the bulk of the atom's mass and is surrounded by low-mass electrons moving through largely empty space.
A change in pressure would have the greatest effect on the solubility of a
Answer:gas in a liquid
Explanation:because it’s hard for gas to escape a space into a liquid
What is the oxidation number for ba??
Answer: +2
I finished the assignment.
Since most sources of noise pollution are caused by essential machines, it is not possible to decrease the levels of sound.
True
False