A) Sodium is the element that will produce a new compound when added to a beaker containing an aqueous solution of copper (II) sulfate ().
When sodium is added to an aqueous solution of copper (II) sulfate, a new compound is formed.
This reaction is known as a displacement reaction and occurs when the sodium ions take the place of the copper ions in the solution.
As the sodium ions bond with the sulfate ions, they form sodium sulfate and free copper ions, which can then be extracted from the solution. This reaction is a great example of how chemical reactions can produce new compounds and materials.
This chemical reaction illustrates how certain substances can interact to create new substances with different properties.
Although a part of your question is missing, you might be referring to this question:
Which element will produce a new compound when added to a beaker containing an aqueous solution of copper (II) sulfate ()?
a) Sodium
b) Berrylium
c) Manganese
d) none of the above
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Provided below are pictures of three different scnearios in which two different chemicals are mixed together. for each scenario, make a claim about whether or not a chemical reaction is occuring. Provide evidence and reasoning to support your claim. If a reaction cannot be determined based on the provided picture, explain why not and how you could determine if a reaction has occured. Use specific examples in your explanation.
Looking at the images that we have, we can see that there is a reaction in the images A and C.
What is a reaction?We would need to settle in our minds what is implied when we talk about a chemical reaction. You have to know that if we are talking about a chemical reaction then we are talking about the kiondfs of reaction that would lead to the following observations;
1) There is a change in the temperature of the system
2) There is an effervescence of gas in the system
3) There is a change in color
4) There is the appearance of a solid in the system
We would now have to look at all the setups that we have here and we have to look at it in such a way that we could know if there is a reaction that is going on in any of them as shown.
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Which of the following elements will form positive ions Na N Cu Br
Answer:
Na, Cu, and Br will form positive ions
Explanation:
Na, Cu, and Br have more protons than electrons, so they will form positive ions.
Na, Cu, and Br are all elements that have an atomic number greater than their number of electrons. This means that they have more protons than electrons, so they will form positive ions when they react with other elements. Na will form Na+, Cu will form Cu+ and Br will form Br+.
name a solid that when burnt colourless gases are formed.One gas is strongly acidic while the other is slightly basic
Sulfur is a solid that when burnt produces two colourless gases: sulfur dioxide (SO2) and sulfur trioxide (SO3). The gas SO2 is strongly acidic, while the gas SO3 is slightly basic. When SO3 is dissolved in water, it forms a solution called sulfuric acid, which is a strong acid. SO2 is also a corrosive gas that can be harmful to humans and the environment. It is often produced as a byproduct of industrial processes, such as the burning of fossil fuels and the production of sulfuric acid.
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calculate the solubility of AgCN in a solution containing 1.0M H Ksp of AgCN is 2.2e-12 Ka of HCN is 6.2e-10
The solubility of AgCN in a solution containing 1.0M H Ksp of AgCN is 2.2e-12 Ka of HCN is 6.2e-10 is 5.9 x 10^-2M.
Given concentration of H+ (M) = 1.0M
Ksp of AgCN = 2.2e-12
Ka of HCN = 6.2e-10
AgCN ⇋ Ag+ +CN− ................Ksp
CN − + H+ ⇋ HCN................... 1/Ka
AgCN + H+ ⇋ HCN + Ag+ ...................Ksp/Ka = K0
K0 = 2.2e-12/6.2e-10 = 0.0035 = 35 x 10-4
At Equilibrium: AgCN + H+ ⇋ HCN + Ag+
Let the moles of [Ag+] = x
So the number of moles of [HCN] = x
K0 = [Ag+] [HCN] / [H+]
35 x 10-4 = x^2/1
x = 5.9 x 10^-2M
Hence the molar solubility of AgCN in buffer solution is 5.9 x 10^-2M.
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What are true about water changing states?
Answer:
The last one is true.
S3o5 chemical compound
Answer:
Stainless SteelExplanation:
Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless SteelAnswer:
Sulfure 3
Oxygen 5
Explanation:
The S stands for Sulfure. And the stands for Oxygen. If you meant the name then its Trisulfur Pentoxide
hopefully that's what you meant.
The Ksp of SrSO4 is 3. 2 x 10^-7. What is the equilibrium concentration of a sulfate ion in a 1. 0 Dash L solution of strontium sulfate which 0. 10 mol of Sr(CH3CO2)2 has been added?
The equilibrium concentration of a sulfate ion is 32× 10⁻⁶M can be added in a 1. 0 Dash L solution of strontium sulfate which is 0. 10 mol of Sr(CH3CO₂)₂.
Solubility is defined as the maximum amount of a solute that can be dissolved in a known quantity of the solvent at a certain temperature is its solubility.
The solubility of SrSO₄ is:
SrSO₄(s) → Sr²⁺(aq) + SO₄²⁻(aq)
Where Ksp is defined as:
Ksp = 3.2x10⁻⁷ = [Sr²⁺] [SO₄²⁻]
The concentration of Sr is:
0.10mol / 1L = 0.10M = [Sr²⁺]
Replacing in Ksp:
3.2x10⁻⁷ = [0.10M] [SO₄²⁻]
[SO₄²⁻] = 3.2x10⁻⁶M
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a reaction such as A+B -> products that exhibits second-order kinetics can be studied using a large excess of one reactant. Under these conditions, the concentration of the reactant in excess will not change much during the reaction, which will exhibit _________-first-order kinetics.
a reaction such as A+B -> products that exhibits second-order kinetics can be studied using a large excess of one reactant. Under these conditions, the concentration of the reactant in excess will not change much during the reaction, which will exhibit pseudo-first-order kinetics.
A fraud or imposter is defined as something or someone that is false but attempts to pass for the real deal. Although it's typically a prefix, pseudo can refer to a faker. A pseudo-intellectual, for instance, will attempt to persuade you that he has a brilliant mind despite the fact that he does not. The fame of a pseudo-celebrity is minimal. A combining form with the meaning "false," "pretended," or "unreal," used in the creation of compound words (pseudo classic; pseudointellectual); in science, designating a close or deceptive resemblance to the following element (pseudobulb; pseudocarp); and occasionally used in the chemical names of isomers (pseudoephedrine). a person who professes to be skilled in academic or creative endeavours but lacks in-depth comprehension or critical thinking. a person who exaggerates their intelligence and engages in intelligence fraud.
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What numbers do I put on the right side?
The leftovers of [tex]C_2H_2[/tex] will be 6 moles while the leftover of [tex]O_2[/tex] will be zero.
Mole ratio of reactantsIn the originally balanced equation of the reaction, 2 moles of [tex]C_2H_2[/tex] and 5 moles of [tex]O_2[/tex] react completely to produce 4 moles of [tex]CO_2[/tex] and 2 moles of [tex]H_2O[/tex]. This equation is balanced with no reactant left.
Now, 8 moles of [tex]C_2H_2[/tex] were made to react with 5 moles of [tex]O_2[/tex] in the second reaction. The mole ratio of the two reactants for complete reactions is 2:5. Thus, [tex]C_2H_2[/tex] has been supplied in excess.
Since only 5 moles of [tex]O_2[/tex] is available, only 2 moles of [tex]C_2H_2[/tex] will be consumed. Thus, 6 moles of [tex]C_2H_2[/tex] will be left while the oxygen will be completely consumed. That is, the amount of [tex]O_2[/tex] left would be zero.
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The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. What would be the boiling point of acetone (ΔHvap 32.0 kJ/mol) at this elevation? What would be the vapor pressure of acetone at 22.0°C at this elevation?
The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr. The vapor pressure of acetone at 22.0°C at this elevation is 212.22 torr.
What is vapor pressure ?The equilibrium pressure of a vapour above its liquid (or solid), or the pressure of the vapour produced by the evaporation of a liquid (or solid) above a sample of the liquid (or solid) in a closed container, is the vapour pressure of a liquid. Substance; vapour pressure at 25 °C, as examples.
In Step 1:
The normal boiling point for acetone = 56.5°C.
At an elevation of 5300 ft the atmospheric pressure = 630 torr
ΔHvap = 32.0 kJ/mol
The temperature is 24.0 °C
In Step 2:
ln(p1/p2) = (∆ H/R) (1/T2 - 1/T1)
Normal atmospheric pressure
= 1 atm
= 760 torr
So, (760/630) = ((32.000 J/mol) / (8.314 J/K*mol)) (1/T2 - 1/329.65 K).
T2 = 324.4 K = 51.25 °C.
This is the boiling point of acetone at 5300 ft.
The vapor pressure = atmospheric pressure at the boiling point for any liquid.
ln (Pv/630atm) = ((32.000 J/mol) / (8.314 J/K*mol)) (1/324.4 K - 1/297.15)
ln (Pv/630) = -13615388.3
Pv = 212.22 torr
Thus, The vapor pressure of acetone at 22.0°C at this elevation is 212.22 torr.
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(Question) How many atoms are in 3 grams of Cu?
(20 points)
Answer: 2.85 x 10^22
Explanation:
We can use stoichiometry to convert grams to atoms.
*Important quantities*
Original amount of Copper: 3 grams
Molar mass of Copper: 63.5 grams
Avogadro's number: 6.022x10^23 atoms/formula units/molecules
Process - [tex]\frac{3gramCu}{1}[/tex]×[tex]\frac{1 mole Cu}{63.5 gCu}[/tex]×[tex]\frac{6.022x10x^{23} }{1 moleCu}[/tex] = 2.84503937×10^22
After taking sig figs into account, the answer needs to be rounded to 3 decimal places
Final answer: 2.85 x 10^22
What is Ghez’s favorite star? Do you have a favorite star? Why or why not?
Andrea Ghez's favorite star is known as SO-2 and it is her favorite star because this star goes around the universe in a short period. I do not have a favorite star because I do not know a lot about stars.
Who is Andrea Ghez?Andrea Ghez is female astrophysicst who was born in the United States known for being one of the few women in the world who have gotten the Nobel Prize in Physics. During her life, Andrea has studied the center of the universe, black holes and the stars. Moreover, she was known for giving a TED talk in whiich she explained about stars and black holes.
What is Andrea's favorite start?In the TED talk given by Andrea Ghez she mentions her favorite star is the SO-2 as "it goes around in only 15 years".
What is my favorite star?I do not have a favorite star because I do not know a lot about stars, although I believe studying them is very interesting.
Note: This question is incomplete; here is the missin information:
TED Talk- Andrea Ghez
"Now, most astronomers have a favorite star, and mine today is a star that's labeled up there, SO-2. Absolutely my favorite star in the world. And that's because it goes around in only 15 years. And to give you a sense of how short that is, the sun takes 200 million years to go around the center of the galaxy"
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Select True or False: The rates of radioactive decay processes, like the rates of chemical reactions, are sensitive to temperature changes.
Answer: False
Explanation:
A ample of helium wa compreed at 35 °C from a volume of 0. 5 L to 0. 25 L where the preure i 500 mmHg. What wa the original preure?
The original pressure was 1000 mmHg.
What is pressure?Pressure is a force applied to a surface or object over a given area. Pressure can be generated in a variety of ways, including through mechanical force, electrical force, or through changes in temperature or chemical reactions. Pressure can be measured using a variety of devices, including a barometer, manometer, or gauge. Pressure is an important concept in many fields such as physics, engineering, chemistry, and medicine. It can be used to measure the force of a liquid or gas, the pressure of a liquid or gas, or the pressure at a certain depth in the ocean.
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Methanol (methyl alcohol or wood alcohol) is a potential automotive fuel, either in pure form or mixed with gasoline. Some fleet vehicles, such as municipal buses, have been modified to burn methanol-containing fuels. These fuels are also used by some race cars. A particular automobile modified to use a mixture of 85.0% methanol and 15.0% gasoline by mass gets 25.5 mi/gal. The fuel has a density of 0.775 g/mL. How many kilograms of methanol does the automobile consume in a trip of 808 km
Answer:
it’s 4
Explanation:
Your lab group accidentally leaves a beaker of 1.00 \space M1.00 M \ce{NaOH}NaOH solution out on the lab table overnight and its volume is decreased to one third the original from evaporation, what is the new molarity
One of the lab groups unintentionally left a beaker with 1.00 M1.00 M of NaOH solution out on the lab table over night. The molarity of the solution is 3.00 M after evaporation.
The total moles of solute contained in a given volume of solution is referred to as a solution's molarity. In this case, "M" stands for molarity, "n" is the number of moles of solute present in the solution, and "V" is the volume of solution present in a container. A unique kind of homogenous mixture made up of two or more components is known as a solution in chemistry. A solute, or substance that is dissolved in a solvent, is one of the components of such a mixture.
Moles = 1.00/1/3 Moles = 3.00 M
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The broad bands or regions located around the nucleus where the electrons are found are called energy rings.
True
False
It is false that the broad bands or regions located around the nucleus where the electrons are found are called energy rings.
The nucleus is the centre of an atom. Protons and neutrons are particles that make up the nucleus. Shells of electrons rotate around the nucleus. The atom is made up of a small nucleus surrounded by electrons that move. The nucleus includes protons, with a positive charge equivalent to the negative charge of an electron. Neutrons, which have almost the same mass but still no charge as protons, may also be found in the nucleus.
The nuclear powerful force extends long enough from each baryon to bind protons and neutrons together while repelling the repelling electrical force between positively charged protons. The nuclear force acting has a relatively narrow range and practically vanishes just beyond the nucleus's border.
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Suppose that 20 mL of 2.50 x 10^-2 M aqueous H 2 SO 4 is required to neutralize 10.0 mL of an aqueous solution of KOH. What is the molarity of the KOH solution
The molarity of KOH solution will be 0.75 M.
The amount of moles of solute per liter of solution is known as molarity (M). Molarity is defined as moles of solute per liter of solution. To ascertain the concentration of an identified analyte, titration is a typical laboratory technique for quantitative chemical analysis. A standard solution with a known concentration and volume is prepared as the reagent, also known as the titrant or titrator.
The balanced equation is
[tex]H_{2} SO_{4}[/tex]+ 2KOH = [tex]2H_{2} O[/tex]+ [tex]K_{2} SO_{4}[/tex]
2.50 x [tex]10^{-2}[/tex] M= [tex]\frac{x}{0.2 L}[/tex]
So, 0.75 M KOH.
So, The molarity of KOH solution will be 0.75 M.
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How many moles are in 4.0 x 10^24 atoms of silicon?
Atoms of silicon have 0.15 moles.
[tex]4.0 × 10^2^4[/tex] atoms of silicon.
We have to find the number of moles.
Silicon has the atomic number 14.
One mole of silicon contains [tex]6.023× 10^2^3[/tex] atoms.
[tex]6.023× 10^2^3[/tex]number of atoms are present in one mole of silicon.
[tex]4.0*10^24[/tex]number of atoms will have-
[tex]6.023*10^2^3/4.0*10^2^4=0.15[/tex] moles.
Thus atoms of silicon have 0.15 moles.
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Calculate the percentage composition (by mass) of oxygen in K2SO4.
36.72 %
18.35 %
9.18 %
23.66 %
76.34 %
Answer:
it's option no A as described in the image
How many moles are in 50 grams?
3.125 moles of oxygen are present in 50 g.
A mole is the volume of a substance that contains 6.022 X 1023 of the substance's particles, atoms, ions, molecules, etc. A mole is a unit for counting molecules, ions, or atoms. Divide the given mass of an element by its molar mass to find the number of moles in that quantity.
The atomic weight of an element, or its relative atomic mass, on the periodic table, expressed in g/mol, is its molecular mass.
The molar mass of oxygen is 16 g/mol, and there are 3.125 moles in a given amount of mass and molar mass.
Consequently, 3.125 moles of oxygen are present in 50 g.
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which of the following molecules has the most polar bond between the bonded atoms in terms of greatest and hf hcl hbr hl
HCl is the most polar due to the high electronegativity of Cl.
Hydrogen chloride is a diatomic molecule, composed of a hydrogen atom, H, and a chlorine atom, Cl, joined by a polar covalent bond. The bond is a polar covalent bond because the chlorine atom is much more electronegative than the hydrogen atom.
Positively charged protons in the nucleus attract negatively charged electrons. As the number of protons in the nucleus increases, the electronegativity, or attractive force, increases. Therefore, electronegativity increases in a row from left to right on the periodic table.
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What does the World Skin Cancer Map tell you about how the skin cancer rates of Australia and Brazil differ?
The World Skin Cancer Map shows that Australia has much higher skin cancer rates than Brazil. In Australia, an estimated 5.4 out of 100 people will develop melanoma in their lifetime, compared to 0.4 out of 100 in Brazil.
What is Skin Cancer?Skin cancer is a type of cancer that affects the skin cells. It is caused by over-exposure to ultraviolet (UV) radiation from the sun and sun beds. It is the most common type of cancer in the United States, and can affect anyone, regardless of age, gender, or skin color. It is very important to protect your skin from the sun by using sunscreen.
Australia also has higher rates of non-melanoma skin cancer, with estimated rates of 24.3 out of 100 people in Australia, compared to 5.3 out of 100 people in Brazil.
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Draw the product (s) formed by heating the following compounds in basic ethanol.
EtOH
NaOEt
the product (s) formed by heating the following compounds in basic ethanol: EtOH and NaOEt is shown in the image.The reaction product is simpler because it is determined by the condition of the reagent and the catalyst or solvent.
there are many factors that determine the product as given. When alcoholic beverages (beer, wine, and spirits) are diluted, ethanol is present. It is used topically to prevent skin infections, in pharmaceutical preparations (such as rubbing compounds, lotions, tonics, and colognes), cosmetics, and perfumes. Ethanol, also referred to as ethyl alcohol, is a colourless, flammable liquid with a strong odour. It is the alcohol found in alcoholic beverages and employed as a solvent that is generated by fermentation. Alcohols are organic molecules made up of carbon, oxygen, and hydrogen atoms. When two carbons are present, the alcohol is referred to as ethanol (also known as ethyl alcohol).
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Show all the work and don't forget to show scientific notation!
In scientific notation, the result of multiplying an integer between 1 and 10 by a power of 10 is written.For instance, 650,000,000 can be represented as 6.5 108 in scientific notation.
Which four guidelines govern scientific notation?Always set the base to 10. The exponent must be an integer that is non-zero, therefore it can either be positive or negative. The absolute value of the coefficient must be less than ten and more than one.
What sort of notation would that be?a system of symbols for designating unique items. Example: In mathematics, the symbol "" stands for "infinity." There are many notations in mathematics.
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A 16. 81 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 21. 33 grams of CO2 and 5. 822 grams of H2O are produced. In a separate experiment, the molar mass is found to be 104. 1 g/mol. Determine the empirical formula and the molecular formula of the organic compound
A 16. 81 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 21. 33 grams of CO₂ and 5. 822 grams of H₂O are produced. In a separate experiment, the molar mass is found to be 104. 1 g/mol. The empirical formula is CH₃ and molecular formula is C₇H₇O₂₁
The empirical formula can be calculate as follows:
The reaction can be write
CxHyOz → CO₂ + H₂O
As a result, we may state that there are two O-atoms for every one C-atom (12g) in CO2 (32g).
This indicates that the ratio is 12g C/32g O.
The molar mass of CO₂ is 44 g/mole.
(12/44) x 33 = 9 g
There are 9 grams of carbon in every 33 grams of CO₂
The same can be done for water:
In H₂O, each element is represented by two H atoms and one O atom. 2 g H and 16 g O.
[2 g H / 18 g H2O] are present in 5. 822 g of water
(2/18)x 5.822= 0.6468 g
The initial sample had 14.16 g of sample, 9 g of C, and 0.6468 g of H, which resulted in 34.3532g of oxygen.
Determine the amount of moles.
C: 9.0 g / 12.0 g/mol = 0.75 mol
H: 0.6468 g / 1.0 g/mol = 0.6468 mol
O: 34.3532g / 16.0 g/mol = 2.14 mol
Then we divide by the smallest number
C: 0.75 mol / 0.6468 mol = 1
H: 0.6468 mol / 0.6468 mol= 1
O: 2.14 mol/ 0.6468 mol = 3
so the empirical formula will be CH₃
Determine the molecular formula
mass molecular formula / mass of empirical formula = n
We have to multiply the empirical formula by n to get the molecular formula.
104.1 /15 = 7= n
This means the molecular formula = C₇H₇O₂₁
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Read the labels of several commercial products and identify monatomic ions of at least four transition elements contained in the products. Write the complete electron configurations of these cations
As stated in the preceding statement [Zn²⁺] = 1s²2s²2p⁶3s²3p⁶3d¹⁰, [Fe3+] = 1s²2s²2p⁶3s²3p⁶3d⁵, [Fe²⁺] = 1s²2s²2p⁶3s²3p⁶3d⁶, [Cd²⁺] = 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰
What is the straightforward meaning of element?Denotes to a basic material that isn't divided into smaller components or transformed into another chemical in chemistry. An atom, which is made up of protons, neutrons, and particles, is really the fundamental unit of an element. An element's atoms all equal the number of protons.
Dietary supplements include Zn²⁺ ions:
[Zn²⁺] = 1s²2s²2p⁶3s²3p⁶3d¹⁰
Mineral water contains Fe³⁺ cations:
[Fe3+] = 1s²2s²2p⁶3s²3p⁶3d⁵
Food supplements may include Fe²⁺ cations:
[Fe²⁺] = 1s²2s²2p⁶3s²3p⁶3d⁶
Paints had Cd²⁺ ions in them:
[Cd²⁺] = 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰
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The complete question is-
Read the labels of several commercial products and identify monatomic ions of at least four transition elements contained in the products. Write the complete electron configuration of these cations. Make sure to clearly identify which monatomic ions is found in which commercial product.
The first substance is nitric acid, HNO3. Since this substance dissolves to generate an acidic solution, the bond between O and H in the structural formula NO2OH breaks when the substance dissolves, making it an oxyacid. The latter substance, Ni(OH)2, is apparently insoluble in neutral water, but will dissolve if the solution is acidic. This behavior is typical of substances that feature basic anions. The bond between Ni and O is the one that breaks when Ni(OH)2 dissolves. The hydroxide ion that is produced quickly reacts with protons in solution and cannot react again with Ni2 to form a precipitate.
Ni(OH)₂ is base but this is not strong base this is very weak base and this cannot gives OH⁻ after dissolving in H₂O . this is only dissolve in acidic solution.
Define acidic solution.A solution is said to be acidic if it contains more positively charged hydrogen ions (H⁺) than negatively charged hydroxide ions (OH⁻). Lemon juice and vinegar are typical examples of acids. The amount of OH ions is greater in bases. Baking soda and regular ammonia are common examples.
Acidic substances can typically be distinguished by their sour flavor. A basic definition of an acid is a molecule that can donate an H⁺ ion and can continue to be energetically favorable even after losing H⁺. Blue litmus paper has a reputation for turning red when exposed to acids. Bases, on the other hand, are distinguished by their bitter flavor and slick consistency.
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3) Which of the following is a true statement?
A: Ice cannot float on water.
B: Carbon is a part of the compound of water.
C: Water is a universal solvent.
D: Hard water is good for making soap lather.
PLS HELP ME PLS
Water is called a ‘universal solvent' because water can dissolve much more substances than any other liquid found in nature but water cannot dissolve every substance.
Is water called universal solvent?Water is referred to as a "universal solvent" because it has a considerably wider range of natural solvent properties than any other liquid. However, water is not capable of dissolving all compounds.
For instance, water cannot dissolve hydroxides, fats, or waxes because oppositely charged particles are not very soluble in water. Hydrogen and oxygen atoms are arranged polarly in water molecules.
The oxygen atom has a negative charge, while the hydrogen atom on one side has a positive charge.The water molecule can more easily attach to various compounds thanks to these charges.
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Because it can dissolve a greater variety of chemicals than any other natural liquid, water is referred to as a "universal solvent," though it does not dissolve all substances. The option C is true.
The term "universal solvent" refers to water.In comparison to other liquids, water has a much larger spectrum of natural solvent qualities, earning it the moniker "universal solvent". Nevertheless, not all substances can be dissolved by water.
Because water is not highly soluble in oppositely charged particles, it cannot dissolve hydroxides, fats, or waxes, for example. Water molecules have polar arrangements of the hydrogen and oxygen atoms.
In contrast to the hydrogen atom on one side, which has a positive charge, the oxygen atom has a negative charge.
These charges allow the water molecule to more readily bind to different substances.
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Calculate ΔS∘ for Ti(s)+2Cl2(g)→TiCl4(g)
Express your answer using four significant figures.
ΔS∘ for Ti(s)+2Cl2(g)→TiCl4(g) is 659.6J/mol.. It is important to note that, as a general rule, a positive ΔS° indicates an increase in disorder and a negative ΔS° indicates a decrease in disorder.
The change in entropy (ΔS) for a chemical reaction can be calculated using the standard entropies (S°) of the reactants and products.
ΔS° = S°(products) - S°(reactants). For the reaction Ti(s) + 2Cl2(g) → TiCl4(g)S° of Ti(s) = 29.1 J/mol·K, S° of Cl2(g) = 223.1 J/mol·K, S° of TiCl4(g) = 167.4 J/mol·K. Therefore, ΔS° = (S°(TiCl4) + 2S°(Cl2)) - S°(Ti)ΔS° = (167.4 + 2*223.1) - 29.1 = 659.6 J/mol·K. So the ΔS∘ for Ti(s) + 2Cl2(g) → TiCl4(g) is 659.6 J/mol·K with four significant figures. It is important to note that, as a general rule, a positive ΔS° indicates an increase in disorder and a negative ΔS° indicates a decrease in disorder. So in this case, the process of going from solid titanium and gaseous chlorine to gaseous titanium tetrachloride increases disorder, which is consistent with a positive ΔS°.
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