The solution(s) that changed pH the most were those that were just water and a NaCl solution, without any buffers.
What factors into a solution's pH?A pH meter, universal indicator solution, or paper can all be used to determine the pH of a solution. The pH scale measures the amount of H+(aq) ions present in a solution. Although mol dm(-3) can be used to express the concentration of H+ ions, using the log(10) function makes the calculations easier.The pH value drops when a solution's hydrogen ion concentration rises, making the solution more acidic. The pH value also rises as the concentration of hydroxide ions in a solution does, making the solution more basic or alkaline.The solution(s) that changed pH the most were those that were just water and a NaCl solution, without any buffers.To learn more about pH value refer to:
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for this reaction it was observed that the first three half-lives were 12.5 h, 25 h, and 50 h when a
Concentration of A after 50 hours = 0.1013 M.
Given that initial concentration of A = 1.621 M
After first half life is after 12.5 hours, concentration is reduced to 0.8105 M.
Concentration of A after 12.5 hours is 0.8105 M
After second half life ( ie 25 hours = 2*12.5 h), concentration of A is reduced to 0.4053 M
After 3rd half life (ie 37.5 hours = 3*12.5 hours) , concentration of A is reduced to 0.2026 M ( Half of 0.4053 M)
Therefore Concentration of A after 50 hours = 0.2026 M
After 4th half life (ie 50 hours = 4*12.5 hours), concentration of A is reduced to 0.1013 M ( Half of 0.2026 M)
Therefore concentration of A after 50 hours = 0.1013 M.
Concentration is the ratio of a constituent's abundance to the mixture's overall volume. The concentration can refer to any form of chemical mixture, but is most usually used to describe the solutes and solvents in solutions. There are several different types of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration.
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which of the following pairs of substances would you expect to form homogeneous solutions when combined? (a) CCl4 and H2O (b) KCl and H2O (c) Br2 and (d)CCl4
Solutions that are homogeneous have a constant composition and set of characteristics. For instance, a cup of coffee, cologne, cough syrup, a salt- or sugar-water solution, etc.
Since cement, water, and numerous other additives are included in concrete, it serves as an illustration of a heterogeneous mixture. As a result, it is not expected that concrete will have a consistent composition throughout. As a result, choice (a) is correct.
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in an acidic solution, the hydroxide ion concentration will be than the hydronium ion concentration; in a basic solution, the hydroxide ion concentration will be than the hydronium ion concentration. t/f
The statement that in an acidic solution, the hydroxide ion concentration is lesser than the hydronium ion concentration, and vice versa in basic solution is true.
Acidic solutions are classified as acids due to low pH and high concentration of hydronium ions. Hence, in acidic solutions, the concentration of hydronium ions is greater than that of hydroxide ions. The compounds or solutions are classified as bases and acids depending upon the level of hydronium or hydroxide ions.
An acidic solution possesses a lower pH while a basic solution has a higher pH value.The hydronium ion is an important factor when dealing with chemical reactions that occur in aqueous solutions. Its concentration relative to hydroxide is a direct measure of the pH of a solution. The pH of a solution depends on its hydronium concentration.
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Which of the following physical properties would be expected to decrease as intermolecular forces increase? A. critical temperature B. boiling point C. vapor pressure
D. heat of vaporization E. none of these properties would decrease
On decreasing the intermolecular forces, the critical temperature increases. So, option A is correct.
Critical temperature is the temperature above which a gas cannot be get liquified. Now, by this hypothesis we mean that the molecules of the gas come closer to each other and thus molecules attract towards each other. Intermolecular forces hold the molecules to each other . They are responsible for keeping a solid a solid and a liquid a liquid. With weak IMF the material remains a gas, like oxygen and nitrogen in our air. The greater force that is applied, the more energy is needed to separate the molecules.
So, more the magnitude of intermolecular force more will be the tendency of a gas to get easily liquify and the critical temperature will substantially get increased
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___ moles of soap are formed per mole of glycerol in a complete saponification reaction which results in a charged product, the salt of a fatty acid because of ___.1. Three; the low pH of the solution in which the reaction takes place2. One; the basic solution in which the reaction takes place3. Three; the basic solution in which the reaction takes place4. One; the low pH of the solution in which the reaction takes place
Alcohol and soap are created when an ester reacts with an inorganic base during saponification. Typically, it happens when triglycerides react with potassium or sodium hydroxide (lye) to create soap, which is a mixture of glycerol and fatty acid salt.
In a process called saponification, which creates long-chain fatty acid salts and glycerol as a byproduct rather than water and salt as in an acid/base reaction. Alkaline hydrolysis of esters is the term for it.
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What mass of ilmenite (in grams) is required if you wish to obtain 950 g of titanium?
299.65 g Ti mass of ilmenite (in grams) is required if you wish to obtain 950 g of titanium.
The molar mass of ilmenite is 151.71 g mol1.
This indicates that each mole of ilmenite will weigh 151.71 g.
One mole of ilmenite will also include one mole of iron, 1Fe, one mole of titanium, 1Ti, and three moles of oxygen, 3O, as you can see by looking at the compound's chemical formula.
Since the molar mass of titanium is 47.857 g mol 1, 151.71 g of ilmenite will contain 47.857 g of titanium. It implies that 950.0 g of ilmenite will contain
= 950 * 47.857 / 151.71
= 299.65 g Ti
if you acquire 47.857 g of titanium for every g of ilmenite.
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To get 950 g of titanium, you need a mass of ilmenite containing 299.65 g of titanium.
Ilmenite has a molar mass of 151.71 g mol1.
This suggests that ilmenite will weigh 151.71 g per mole.
As can be seen from the chemical formula of the compound, one mole of ilmenite will also include one mole of iron, 1Fe, one mole of titanium, 1Ti, and three moles of oxygen, 3O.
151.71 g of ilmenite will contain 47.857 g of titanium since titanium has a molar mass of 47.857 g mol 1. According to the statement, 950.0 g of ilmenite will
= 950 * 47.857 / 151.71
= 299.65 g Ti
if each gram of ilmenite yields 47.857 grams of titanium.
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g draw all possible stereoisomers of stilbene dibromide, making sure to draw each stereoisomer only once. id all pairs of enantiomers and any meso compounds. assign r/s configuration to all stereocenters on your drawings.
Stilbene dibromide includes (1R,2S)-1,2-dibromo-1,2-diphenylethane, (1R,2R)-1,2-dibromo-1,2-diphenylethane, (1S,2S)- It has three stereoisomers. 1,2-dibromo-1,2-diphenylethane.
Bromination of trans-stilbene primarily yields meso-1,2-dibromo-1,2-diphenylethane. Electrophilic bromine addition reaction. Stilbenes can exist as both trans and cis stereoisomers, but they naturally occur predominantly as the trans isomer due to their greater thermodynamic stability compared to the cis isomer.
If a molecule has two stereocenters there should be four possible stereoisomers. If a molecule has 3 stereocenters, there should be up to 8 stereoisomers. Therefore, the maximum number of stereoisomers for a given configuration is 2n. where n is the number of chiral centers.
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based on the solubility rules, which one of these compounds is soluble in water? baso4 k2so4 pbso4 caso4 ag2so4
According to the solubility criteria, which divide solutes either highly soluble, sparingly soluble, and insoluble depending on how much of a chemical dissolves in a solvent, AgBr is one of these compounds that is
What are the GCSE rules for solubility?The amount of a substance that will dissolve at its greatest mass in such a given solvent volume at a specific temperature is known as its solubility. A high solubility indicates a substance to be particularly soluble. Low solubilities refer to substances that are either insoluble or just very little of them dissolve.
Which four solubility factors are there?The solubility of gases in liquids is significantly influenced by four different parameters. the liquid and gas's and the pressure's relative sizes, temperatures, and chemical reactions. Henry's law states that by increasing pressure, the gas in the liquid will often become more soluble.
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which refers to a measure of how acidic or basic a solution is? ph solubility reactiveness hardness; which solution has the greatest number of hydroxide ions?; which is formed by positive ions from a base and negative ions from an acid?; which product contains a strong base that would most likely completely dissolve in water?; a solution has a ph of 8. which best describes the solution?; which best describes the ph scale?; which is the order of these solutions from strong acid to strong base?; carla is using a fertilizer that contains nitric acid. how is nitric acid classified?
The pH scale determines how acidic or basic water is. The range is 0 to 14, with 7 representing neutrality. pH values below 7 indicate acidity, whereas those over 7 suggest a base (a result of a chemical interaction
Examples of chemical reactions and what they are.Reactants engage in a chemical reaction during a chemical reaction, which results in the transformation of reactants into products. for instance Inhaling oxygen causes glucose to react, producing carbon dioxide, water, and energy. This is the process of respiration.
In simple terms, what exactly is a chemical reaction?chemical reaction: a process wherein one or more substances—the reactants—are changed into one or more additional substances—the products. Chemical elements and compounds are both substances.
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Finish the pre-laboratory assignments before the laboratory experiment. Read the manual of this experiment and complete the following questions. 1. a. Identify oxidation-reduction reactions in the copper cycle experiment. For each oxidation-reduction reaction, write half reactions to show what is oxidized and what is reduced. b. Identify acid-base reactions and precipitation reactions in the copper cycle experiment. Write equations for the corresponding reactions. b. How many mL of 3.0 M NAOH are required to neutralize 4.0 mL of 16.0 M HNO2?
Oxidation-reduction reactions in the copper cycle experiment. For each oxidation-reduction reaction, half reactions to show copper is oxidized and copper is reduced.
Any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by acquiring or losing an electron is referred to as an oxidation-reduction reaction. Some of the fundamental processes of life, such as photosynthesis, respiration, combustion, and corrosion or rusting, depend on redox reactions.
The copper gets oxidized and in the fourth step, the copper gets reduced.
Acid - base reaction
In a chemical reaction known as neutralization or neutralisation, an acid and a base interact quantitatively. By neutralizing a reaction in water, surplus hydrogen or hydroxide ions are removed from the solution.
CuO(s) + H₂SO₄(aq) -->CuSO₄(aq) + H₂O(l)
precipitation reaction
Cu(NO₃)₂(aq) + 2NAOH(aq) -->Cu(OH)₂ + 2NANO₃
Thus, 21.3 mL of NaOH is required to react with 4 mL of 16 M HNO3 H N O 3 .
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This term is used to describe the molecules that are being studied in a thermodynamic reaction.
-System
-Surrounding
-Container
-Vessel
The term used to describe the molecules that are being studied in a thermodynamic reaction is system.
Thermodynamics refers to the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics define the way energy in a system change and whether the system can perform useful work on its surroundings. Thermodynamic reaction or control is a reaction in which the product ratio is determined by the relative stability of the products. Thermodynamic stability occurs when a system is in its lowest energy state, or in chemical equilibrium with its environment. Hence, thermodynamic studies study molecules within a system.
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Select the electron configurations for
(a) Co3+
[Ar]3d5
[Ar]3d6
[Ar]3d7
[Ar]4s13d5
[Ar]4s13d6
[Ar]4s13d7
[Ar]4s23d4
[Ar]4s23d5
[Ar]4s23d6
(b) Cu2+
[Ar]3d8
[Ar]3d9
[Ar]3d10
[Ar]4s13d8
[Ar]4s13d9
[Ar]4s13d10
[Ar]4s23d8
[Ar]4s23d9
[Ar]4s23d10
(c) Ag+
[Kr]4d8
[Kr]4d9
[Kr]4d10
[Kr]5s14d8
[Kr]5s14d9
[Kr]5s14d10
[Kr]5s24d8
[Kr]5s24d9
[Kr]5s24d10
A Co3+ ion has the ground-state electron configuration 1s2 2s2 2p6 3s2 3p6 3d6.
Cu2+ has the electronic structure [Ar]3d9.
A Ag+ ion's electron configuration would be [Kr]4d10.
How is the electron configuration determined?The shell number (n), kind of orbital, and superscript indicating the number of electrons in the orbital are the first three symbols used to represent the electron configuration. On the periodic chart, for instance, you can see that oxygen has eight electrons.
Which three electron configuration rules apply?When writing electrical setup, there are three rules to follow: the Aufbau idea. The Pauli exclusion rule. Hound's Law.
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Answer:
A
Explanation:
A) Provide a complete mechanism for the above Friedel-Crafts Reaction. Pay close attention to details, including lone pairs, formal charges and the use of curved arrows.
The Lewis acid and the chlorine atom of the acid chloride form a complex during the Friedel-Crafts acylation reaction. Cleaving the complex's C-Cl bond produces an acylium ion. The acylium ion is resonance stabilized and has a positive charge on the carbon atom.
The term "Friedel-Crafts Alkylation" describes the substitution of an alkyl group for an aromatic proton. This is accomplished by using a carbocation to conduct an electrophilic attack on the aromatic ring. Alkyl halides are used as reactants in the Friedel-Crafts alkylation reaction, which produces alkylbenzenes.
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Which of the following is not a result of special additives blended into the monomer liquid and polymer powders?
longer shelf life.
color stability.
maximum flexibility.
maximum durability.
The following is not a result of special additives blended into the monomer liquid and polymer powders is maximum flexibility.
A monomer is the molecule that will combine to another identical monomer and form the polymers. A monomer is the simplest unit of the polymer. A polymer is the natural or it can be synthetic substance that is composed of the very large molecules and is called as macromolecules. A polymer is composed of the repeating units. the additive blended to the monomer is not the results in the maximum flexibility.
Thus, the maximum flexibility is not a result of special additives blended into the monomer liquid and polymer powders
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Indicate the concentration of each ion or molecule present in the following solution.
A mixture of 45.0mL of 0.272M NaCl and 65.0mL of 0.0247M (NH4)2CO3. Assume that the volumes are additive. Express your answer numerically using three significant figures. If there is more than one answer, separate them by a comma.
The concentration of Na+ ion = number of moles/ volume = 45*0.272/110 = 0.111 M
The concentration of Cl- ion = 45*0.272/110 = 0.111 M
The concentration of NH4+ ion = 2*65*0.0247/110= 0.0292M
The concentration of CO32- ion = 65*0.0247/110= 0.0146 M
An ion is an atom or a group of atoms wherein the number of electrons isn't like the number of protons. If the wide variety of electrons is less than the wide variety of protons the practical is a positive ion, also referred to as a cation.
By means of definition, an ion is an electrically charged particle produced through either casting off electrons from a neutral atom to provide a high quality ion or including electrons to a impartial atom to offer a negative ion. Whilst an ion is formed, the wide variety of protons does not change.
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The concentration Na+ , Cl-,NH4+,CO32- are respectively 0.111M, 0.111M, 0.029M, 0.0146M
The concentration of Na+ ion = number of moles/ volume = 45*0.272/110 = 0.111 M
The concentration of Cl- ion = 45*0.272/110 = 0.111 M
The concentration of NH4+ ion = 2*65*0.0247/110= 0.0292M
The concentration of CO32- ion = 65*0.0247/110= 0.0146 M
Concentration:
Concentration is the component's abundance divided by the total volume of the mixture. There are several types of mathematical descriptions, such as mass concentration, molarity, number concentration, and volume concentration.
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Balance the reaction of H2 + O2 = H2O using this chemical equation balancer!
Answer:
2 H2 + O2 ---> 2 H2O
Explanation:
Amount in the beginning:
- Left side : 2 H and 2 O
- Right side: 2H and 1 O
You need the same amount of H en O on each side. You are missing 1 O on the right side, so you add another one by placing 2 infront of O on the left side. Now the O is balenced.
The H is out of balance now. You have 4 on the right side and 2 on the left side. So you add 2 H on the left side, by putting a 2 ahead of H2. Now you have 4H in total on the left and on the right side. The reaction is now balenced.
11.25 considering the organic compound, classify each of the following transformations, some of which may be unfamiliar, as an oxidation, a reduction, or neither. for those that are oxidations or reductions, tell how many electrons are gained or lost.
The reaction given above is as follows:
CH₄ + Br → CH₃Br
This reaction is categorized under halogenation reaction.
Halogenation reaction refers to a type of chemical reaction that involves the replacement of a halogen atom with another substance wherein the halogen atom ends up as a part of that substance or a compound. In general, during the halogenation reaction, there is usually an addition of one or more halogens to the substance occurs.
Halogenation reaction is the addition of halogen atoms to a π‐bond system. For example, the addition of bromine to ethene produces the substituted alkane known as 1,2‐dibromoethane.
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Write down an 2 examples of a single displacement reaction.
Explain the importance or uses of these chemical reactions in everyday activities of people. (PROVIDE MORE THAN ONCE SENTENCE)
Example:
Single replacement- 2K + 2H2O → 2KOH + H2
Potassium hydroxide is used in making soap, as an electrolyte in alkaline batteries and in electroplating, lithography, and paint and varnish removers. Medically, potassium hydroxide (KOH) is widely used in the wet mount preparation of various clinical specimens for microscopic visualization of fungi and fungal elements in skin, hair, nails, and even vaginal secretions
Example:
Single displacement- Zn + CuSO4 → ZnSO4 + Cu
This reaction is commonly used in the purification of copper, as the zinc ions in the reaction are less reactive than copper and will not dissolve in the sulfuric acid solution. The resulting copper can be easily separated from the zinc sulfate solution by electrolysis.
Single displacement- Al + CuCl2 → AlCl3 + Cu
This reaction is used in the production of aluminum chloride, which is a common starting material for the synthesis of a variety of compounds used in pharmaceuticals, fragrances, and other industrial applications. The aluminum chloride produced in this reaction can also be used as a catalyst in the production of polymers and in the refining of petroleum products.
is present when a person experiences less effect from the same dose of a substance and needs more and more of it to achieve intoxication. (ap10.2)
When a person takes more of a substance to become intoxicated after taking the same quantity and experiences less of its effects, tolerance is present.
This person may have extraordinarily high drug levels in their blood. Alcohol, painkillers, stimulants, and nicotine are highly tolerable substances. Cannabis and PCP have low tolerance levels. Strong scientific data demonstrates that alcoholism or drug addiction is a chronic brain illness with relapse and recovery possibilities. As a person uses substances more frequently, their brains undergo significant changes that make it harder for them to maintain control over their substance use. Long after substance use has stopped, the brain remains. It is yet unknown how much or how long it might take to reverse these alterations.
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A beam is being designed to work immersed in a heated fluid. The beam has to be strong enough to support a load and also be rigid enough so it does not deflect too much. Corrosion resistance is important, so the beam will be electroplated. Heat transfer characteristics are desired for heat dissipation. Five alternative materials have been suggested from which the choice will be made. a) Malleable C.I. ASTM 220 b) Gray C.I. ASTM A48 c) Steel ASTM A36 d) Al2024 T4
e) Al6061 T6
Five attributes have been identified, which are: a) Ultimate Strength Su (MPa)
b) Elastic Modulus E (GPa) c) Corrosion Resistance 3 =Good,2= Fair, 1=Poor. d) Heat Transfer Ability K(W/m⋅K)
e) Cost Dollars per Kg. Properties estimated for these five materials are as shown in Table 16. Determine the best material if supporting the weight (strength) is the number one priority followed by rigidity. Cost is more important than the heat transfer. Corrosion resistance is important but the cast iron and steel beams will be electroplated.
The use of ASTM B152 plate be in compliance with that ASME Code for process piping since it wouldn't bear the required heat transfer rate.
What steel type and ASTM designation is preferred for W-shapes?The correct answer is option A, that is ASTM E-119 test.They are Standard Test Methods for Fire Tests of Building Construction and Materials which have been approved for use by agencies of the Department of Defense.These test methods are intended to evaluate the duration for which the types of building elements contain a fire, retain their structural integrity, or exhibit both properties during a predetermined test exposure.It states that the performance of walls, columns, floors, and other building members under fire exposure conditions is an item of great importance in securing constructions that are safe, and that are not a menace to neighboring structures nor to the public.To control this it is necessary that the fire-resistive properties of materials and assemblies are measured and specified according to a standard expressed in terms that are applicable to a wide variety of materials, situations, and conditions of exposure.Such a standard is found in the ASTM E-119 test.To learn more about ASTM designation refer to:
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Why do chemical reactions occur at all?; What occurs during all chemical changes?; What causes a chemical change?; Do chemical changes occur everywhere?
When atoms establish or break chemical bonds, chemical processes take place. When bonds between molecules or atoms are created, disrupted, or both, chemical changes result.
Which four chemical substances are they?Covalent bonds hold together molecules, ionic bonds hold together ions, metallic bonds hold together intermetallic compounds, and coordinate covalent bonds hold coordination complexes together.
What constitutes a chemical?Each molecule with just an analytical grade is deemed to be a chemistry. So a chemical always has the same "stuff," to put it another way. Natural substances like water include certain compounds.
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construct the lewis structure of no2no2 . draw the molecule by placing atoms on the grid and connecting them with bonds. include all lone pairs of electrons and nonbonding electrons.
Although NO2 is a bent molecule, when you take an electron out of it to get NO2+, the molecule becomes linear as a result of the loss of a lone electron.
What is the number of electrons in the Lewis structure of NO2 ?The Lewis structure of NO2 has 18 valence electrons in total. In the NO2-Lewis structure, nitrogen is the least electronegative atom, hence it is placed in the middle of the structure.
Why do no2's 18 valence electrons exist?In the nitrite ion, we have 5 valence electrons for nitrogen, 6 for oxygen, but since there are 2 oxygen atoms, we will double that number by 2, plus 1 for this valence electron up top, giving us a total of 18 valence electrons for the Lewis structure of the nitrite ion.
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taking logarithms and antilogarithms is necessary to solve many chemistry problems. for practice, complete the following table, where is a number.
N = 7.35 ln in row 1; N Equals ln(7.35) = 1.995 logarithmic N = log(7.35) (7.35) To solve many chemical problems, logarithms and antilogarithms must be used.
Antilogarithms: How are they solved?The bases of logarithm and antilog are both 2.7183. Logarithms and antilogarithms with bases of 10 need be multiplied by 2.303 to create natural logarithms and antilogarithms.
How are the antilogarithm and log calculated?For both numbers, the base must be the same. Log b x y = p - q (= log b x - log b y is the outcome of taking logs on both sides. The inverse function of the difference in the two numbers' logarithms is what is used to divide them.
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open the phase diagram for co2 given in the introduction again. use the phase diagram for co2 in the interactive activity and determine which of the following statements are correct.
The phase diagram of CO2 has a melting curve that slopes up and to the right, in contrast to the phase diagram of water, which has a more conventional shape. It is impossible for liquid CO2 to exist at pressures lower than 5.11 atm because the triple point is 5.11 atm and 56.6 °C.
Due to the fact that ice is less thick than liquid water, the phase diagram of water has an odd melting point that drops with pressure. Carbon dioxide cannot exist as a liquid at atmospheric pressure, according to the phase diagram of the gas. Thus, gaseous carbon dioxide directly sublimes from solid carbon dioxide.
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Can oxygen and sulfur form an ionic bond?
The oxygen–sulfur system would therefore have the strongest ionic character. A difference in electronegativity of 1.0 would result from this.
Can oxygen and sulfur combine?Sulfur dioxide is created when sulfur and oxygen react. A molecular compound is the end result of nonmetal reactions. The nonmetal reactants frequently mix in various ratios to yield various products. Sulfur trioxide is created when oxygen and sulfur interact.
Do oxygen and sulfur have a polar bond?sulfur and oxygen atoms have different levels of electronegativity, SO2 is polar in nature. The polarity of the molecule will increase with the difference in electronegativity.
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A student determines that a gas has a density of 1.948gL at a pressure of 748.1 mmHg and a temperature of 22.9 C. What is molar mass of gas?
Answer: 48.0 g/mol
Explanation:
The formula for molar mass of a gas is M=(RTd)/P, where R is the gas constant, d is density, T is temperature in kelvin, and P is pressure in atm.
First, we must convert mmHg to atm, 748.1/760= 0.9843 atm.
Then, we must convert C to K, 22.9+293=295.9K.
Lastly, we can plug in our values:
M=(1.948x0.082x295.9)/0.9843=48.0g/mol
When each of the following equilibria is disturbed by increasing the pressure as a result of decreasing the volume, does the number of moles of reaction products increase, decrease, or remain the same?
1. CO(g) + H2O(g) ⇌ CO2(g) + H2(g)
2. 2CO(g) ⇌ C(s) + CO2(g)
3. N2O4(g) ⇌ 2NO2(g)
1. CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g), the number of moles of products remains the same.
2. 2CO(g) ⇌ C(s) + CO₂(g), the number of moles of products increase.
3. N₂O₄(g) ⇌ 2NO₂(g), the number of moles of products decrease.
What is equilibrium?Any change in the equilibrium can be studied on the basis of Le-Chatelier's principle. This principle can describe that for any change in the variables of the reaction, the equilibrium shift in the direction to minimize the effect of that change.
CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g)
On increasing the pressure, the equilibrium shift in direction where decrease in pressure is occurring, the reaction will shift in no direction because the number of gaseous moles is the same on both sides. Therefore, no increase in the number of moles of products.
2CO(g) ⇌ C(s) + CO₂(g)
On increasing the pressure, the reaction will shift in a forward direction because the number of gaseous moles is less on the product sides. Therefore, increase in the number of moles of products.
N₂O₄(g) ⇌ 2NO₂(g)
On increasing the pressure, the reaction will shift in a backward direction because the number of gaseous moles is less on reactant side both sides. Therefore, decrease in the number of moles of products.
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which of the following statements correctly describe different types of mixtures? select all that apply. a) A heterogeneous mixture contains two or more different phases, b) A colloid is a type of solution, c) Differences in particle size account for the main differences between solutions and colloids. d) The phases of a heterogeneous mixture are always visibly distinct. e)The composition of any mixture is variable
These claims provide the clearest definition of the type of mixture in the statement;
A) Heterogeneous mixtures often contain two or more unique components.
D) In a heterogeneous combination, individual components may always be identified.
E) Any mixture's composition can change.
-NO, the fundamental distinctions between solutions and colloids are not caused by variations in particle size.
-The consistency of the mixture's particles makes the biggest difference.
-A heterogeneous solution called a colloidal solution has particles in it that are between the size of those in a real solution and those in a suspension solution.
Mixture:- A mixture is a material that results from the interaction of two or more substances without undergoing any chemical transformation.
Mixtures can roughly be divided into two types, these are Homogeneous Mixture and Heterogeneous Mixture
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which of the following can be classified as small fires that need immediate attention before they get larger and more serious?
Small fires that need immediate attention before they get larger and become more serious : Incipient fires.
What do you understand by Incipient fires?Incipient refers to a fire that has just begun and is of size that has poor visibility, smoke inhalation and high temperatures.
It has flames that are small and not widespread. Incipient fires has smoke that allows for visibility in the room. The heat emitted from the flame is quite low.
Things that should be done when responding to incipient stage fire: Sound fire alarm and call the fire department, identify a safe evacuation path and do not allow the fire, heat or smoke to come between you and the evacuation path.
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foods we eat contain carbohydrates, proteins, and lipids that provide chemical energy. this chemical energy is eventually turned into
Foods that we eat contains carbohydrates, proteins and lipids that provide chemical energy. This chemical energy is eventually turned into thermal energy, kinetic energy and other forms of chemical energy.
The major constituents of food are carbohydrates, proteins and lipids. These serve as the fuel for the proper functioning of the body. The breakdown of these molecules inside our body by the process of digestion and transportation into the bloodstream helps in transforming the chemical energy stored in foods to kinetic, thermal and other forms of energy.
As a result of this transformation, human beings feel warm, can move and can perform their day-to-day activities.
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