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Related Questions
what type of forces either interatomic or intermolecular forces prevents ice cubes from adopting the shape of their container
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There are two types of electrostatic forces: interatomic or intermolecular.
In this case the type of force that prevents ice cubes from adopting the shape of their container is intermolecular.
Interatomic forcesWithin a molecule, the atoms are held together by interatomic forces. These forces are what determine the chemical properties of substances because it is these forces that must be overcome for a chemical change to occur.
In summary, intermolecular forces are characterized by holding more than one molecule together.
Intermolecular forcesOn the other side, intermolecular forces act on different molecules or ions and cause them to attract or repel each other, causing different physical states in chemical compounds.
Therefore, the intermolecular forces are responsible for the existence of the liquid and solid state (between the molecules of a gas do not exist intermolecular forces.).
Case of ice cubesThen ice cubes do not ocuppy the shape of thir container because it is in solid state, existing intermolecular force between molecules to maintain said physical state.
In summary, the type of force that prevents ice cubes from adopting the shape of their container is intermolecular.
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https://brainly.com/question/14220340?referrer=searchResultshttps://brainly.com/question/13136165?referrer=searchResultsIf a solution has a poh of 7, what is the [OH-] equal to?
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The pOH of a solution can be calculated using the formula: pOH = -log[OH-]. To find the [OH-] concentration when the pOH is 7, we need to convert the pOH value to the OH- concentration.
Starting with pOH = 7, we can rearrange the equation to find [OH-]. Taking the antilog of both sides, we get 10^(-pOH) = 10^(-7). This simplifies to [OH-] = 10^(-7) or 0.0000001 M.
Therefore, the [OH-] concentration in the solution with a pOH of 7 is 0.0000001 M or 1 x 10^(-7) M.
It's worth noting that the pOH and pH of a solution are related by the equation: pH + pOH = 14. In this case, if the pOH is 7, the pH of the solution would be 14 - 7 = 7.
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3. A Wilkinson’s catalyst is widely used in the hydrogenation of alkenes. Show a catalytic cycle, including: i. chemical structure of the catalyst, with complete stereochemistry ii. molecular geometry of catalyst iii. type of reactions involved iv. the appropriate starting material, reagent and solvent v. major and minor end-products vi. all intermediates, for each reaction stated in (iii)
Answers
We can see here that the catalytic cycle for the hydrogenation of alkenes using Wilkinson's catalyst involves several steps.
What are the steps involved?Here's an overview of the catalytic cycle, including the necessary details:
i. Chemical structure of the catalyst:
Wilkinson's catalyst, also known as chloridotris(triphenylphosphine)rhodium(I), has the following chemical structure: [RhCl(PPh3)3]
ii. Molecular geometry of the catalyst:
The Wilkinson's catalyst has a trigonal bipyramidal geometry around the rhodium center. The three triphenylphosphine (PPh3) ligands occupy equatorial positions, while the chloride (Cl) ligand occupies an axial position.
iii. Type of reactions involved:
The catalytic cycle involves several reactions, including:
Oxidative addition: The rhodium center undergoes oxidative addition, reacting with molecular hydrogen (H2) to form a dihydride intermediate.Alkene coordination: The alkene substrate coordinates to the rhodium center, forming a π-complex.Hydrogenation: The coordinated alkene undergoes hydrogenation, resulting in the addition of hydrogen atoms to the double bond and formation of a metal-alkyl intermediate.Reoxidation: The metal-alkyl intermediate reacts with a hydrogen molecule to regenerate the rhodium dihydride species.iv. Starting material, reagent, and solvent:
The starting material is an alkene, and the reagent is Wilkinson's catalyst ([RhCl(PPh3)3]). The reaction is typically carried out in a suitable solvent, such as dichloromethane (CH2Cl2) or tetrahydrofuran (THF).
v. Major and minor end-products:
The major end-product of the hydrogenation reaction is the fully saturated alkane, resulting from the addition of hydrogen across the double bond. The minor end-product may include cis- or trans-configured alkanes if the original alkene substrate possesses geometric isomers.
vi. Intermediates:
The intermediates in the catalytic cycle include:
Rhodium dihydride complex: [RhH2(PPh3)3]Alkene-Rhodium π-complex: [Rh(η2-alkene)(PPh3)3]Metal-alkyl intermediate: [Rh(alkyl)(PPh3)3]These intermediates play a crucial role in facilitating the hydrogenation reaction and enabling the catalytic cycle to proceed.
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In the laboratory, a quantity of I2 was reacted with excess H2 to give 1.26 moles of HI. It is also known that the percent yield of this reaction was 84.0%. How many moles of I2 reacted
Answers
Answer:
1.008moles of iodine
Explanation:
Hello,
This question requires us to calculate the theoretical yield of I₂ or number of moles that reacted.
Percent yield = (actual yield / estimated yield) × 100
Actual yield = 1.2moles
Estimated yield = ?
Percentage yield = 84%
84 / 100 = 1.2 / x
Cross multiply and solve for x
100x = 84 × 1.2
100x = 100.8
x = 100.8/100
x = 1.008moles
1.008 moles of I₂ reacted in excess of H₂ to give 1.2 moles of HI
The number of moles of I2 reacted should be 1.008moles of iodine
Calculation of the number of moles:We know that
Percent yield = (actual yield / estimated yield) × 100
Here
Actual yield = 1.2moles
Estimated yield = x
And, Percentage yield = 84%
So,
84 / 100 = 1.2 / x
100x = 84 × 1.2
100x = 100.8
x = 100.8/100
x = 1.008moles
Therefore, The number of moles of I2 reacted should be 1.008moles of iodine
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A solution is prepared by dissolving 108.4 g HCl in enough water to make 150.0 L of solution.
Calculate the H+ concentration, [H+], and pH of this solution.
Answers
The [H⁺] is 0.019 M and the pH of the solution is 1.72
Since HCl is a strong acid with a single ionizable hydrogen ion, the concentration of H⁺ ions will be same as the molar concentration of HCl solution.
\(\rm Molar\ concentration \ of \ HCl\ [HCl] = \frac{no. \ of\ moles\ of\ HCl}{Volume\ of\ the\ solution[L]}\)
\(\rm Number\ of\ moles\ of\ HCl = \frac{Given\ mass}{Molecular\ mass}\)
\(= \frac{108.4}{36.5}\)
\(= 2.96 \ moles\)
Therefore,
\(\rm [HCl] = \frac{2.96}{150.0}\)
\(\rm [HCl] = 0.019\ M\)
Therefore, [H⁺] = 0.019 M
Since, pH = - log [H⁺]
= - log [0.019]
= 1.72
The [H⁺] is 0.019 M and the pH of the solution is 1.72.
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Enter the chemical equation 2H+(aq)+S2−(aq)→H2S(g)
.
Express your answer as a chemical equation.
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The chemical equation for the reaction 2H⁺(aq) + S₂⁻(aq) → H₂S(g) can be represented as 2H⁺(aq) + S₂⁻(aq) → H₂S(g).
What is a chemical equation?A chemical equation uses symbols and formulas to express a chemical reaction. It displays the products on the right side of the arrow and the reactants on the left.
For example, in the chemical equation
2H₂(g) + O₂(g) → 2H₂O(l),
represents the reaction between hydrogen gas (H2) and oxygen gas (O₂) to produce liquid water (H₂O). The coefficient "2" in front of H₂ and H₂O indicates that two molecules of hydrogen gas and two molecules of water are involved in the reaction.
The equation is balanced using coefficients to make sure that each element has the same amount of atoms on both sides. The substances involved in the reaction and their stoichiometric relationship are described by chemical equations.
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Calculate the heat energy of liquid mercury at 28900 °C is converted to solid mercury at its melting point.
Answers
The heat energy given off when liquid mercury at 28.9 °C is converted to solid mercury at its melting point is 284.2 J.
What is the heat energy given off when liquid mercury at 28.9 °C is converted to solid mercury at its melting point?The heat energy given off when liquid mercury at 28.9 °C is converted to solid mercury at its melting point is determined as follows:
Moles of Mercury:
14.0 g Hg x 1 mol Hg/201 g = 0.0697 moles
Heat released:
q = heat = m x C x ∆T
25ºC = 298.15K
25ºC = 298.15K
∆T = 234.32 K- 298.15 K
∆T = 63.83 K
q = (0.0697 mol)(28.0 J/molK)(63.83K) = 124.6 J
The heat released from liquid to solid:
q = m x ∆H fusion = (0.0697 mol)(2.29 kJ/mol)
q = 0.1596 kJ
q = 159.6 J
The total heat energy is given off:
Qtotal = 124.6 J + 159.6 J
Qtotal = 284.2 J
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Complete question:
Calculate the heat energy released when 14.0 g of liquid mercury at 28.9 °C °C is converted to solid mercury at its melting point.
The net current flowing at the equilibrium potential is zero. Yet this is a dynamic situation with equal opposing cathodic and anodic current components whose absolute value is i0. Suggest an experimental route for estimating the value of i0.
Answers
Answer:
C)
Let the cost price be x
Since profit is given as 20%, selling price will be (1+0.2)x
Thus, selling price would be 1.2x.
When C.P. and S.P. are Rs. 20 less then,
C.P. =x−20
S.P. =1.2x−20
According to the given condition,
Now, 1.2x−20=1.3×(x−20)
⇒1.2x−20=1.3x−26
⇒1.3x−1.2x=−20+26
⇒0.1x=6
⇒x=60
therefore, the cost price of the article is Rs. 60
Explanation:
The solubility product constant of calcium sulfate, CaSO4, is 7.10 x 10-5. Its molar
mass is 136.1 g/mol. How many grams of calcium sulfate can dissolve in 75.0 L of
pure water?
Answers
Therefore, 86.1 grams of calcium sulfate can dissolve in 75.0 L of pure water at equilibrium.
What is the calcium sulfate equilibrium constant?Only a small amount of calcium sulphate is available. The equilibrium constant, also referred to as the solubility product, is written as Ks for this kind of dissolution process. Ks = 4.9 10 6 for this reaction. K s = 4.9 10 6.
The formula for calcium sulphate's solubility product constant is:
Ksp = [Ca2+][SO42-]
The solubility product constant, Ksp, is equivalent to the product of the molar concentrations of Ca2+ and SO42- at equilibrium:
[Ca2+][SO42-] = Ksp
The following calculation can be used to determine the molar solubility of calcium sulphate:
Ksp = [Ca2+][SO42-] = x²
where x is the molar solubility of calcium sulfate.
Therefore, x = √(Ksp) = √(7.10 x 10⁻⁵) = 8.43 x 10³M
m = n × M
n = V × C
Substituting the given values, we get:
n = 75.0 L × 8.43 x 10⁻³ mol/L = 0.632 mol
m = 0.632 mol × 136.1 g/mol = 86.1 g
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What type of chemical reaction is represented by this balanced equation? S8(s)+802(g)-->8SO2(g)
Answers
Answer: I think it could be Decomposition
Explanation: I think is composition because decomposition starts by being together and ends up as two
what variables effect whether or not the fishing weight floats
Answers
Answer:The fishing way and how fast is going
Explanation:Because of the variables the fishing we will flow much more faster
Atoms of which two elements could combine with atoms of silver (AG) to form metallic bonds
Select all that apply-
A-I
B- P
C- Br
D- Ag
E- Cu
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Metals are the only substances that can interact with silver (Ag) atoms to form metallic bonds. Ag and Cu are the proper responses as a result.
Which two atom types combine to form a metallic bond?Electrostatic attraction between metal cations and delocalized electrons produces metallic bonds. Many of the physical characteristics of metals, like conductivity and malleability, are explained by the type of metallic bonding that exists.
Which elements can be bonded together by metallic bonds?The only substances with metallic connections between their atoms are metals. While certain elements, such as iron, aluminum, gold, silver, and nickel are frequently referred to as metals, metals also include a range of additional elements.
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Which best describes a difference between energy transformation in power plants and dams?
Answers
Answer:
Which best describes a difference between energy transformations in power plants and dams? Only power plants use fossil fuels to transform energy. Only dams use fission to generate thermal energy. ... Only dams use mechanical energy to produce electricity.
Explanation:
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People living in some countries have a difficult time obtaining foods that are high in vitamin A. Which advantage of genetic technologies would these people most benefit from? O higher tolerance of crops to temperature changes O decreased crop resistance to disease O lowered cost of food production O increased nutritional value of crops hurry up asap
Answers
Answer:
the answer i believe is increased nutritional value of crops
Explanation:
Answer: increased nutritional value of crops
Explanation:) edge 2022
In the reaction of hydrogen gas and oxygen gas to form water, the glowing splint..
provides the kinetic energy for the reaction
is one of the products of the reaction
provides the activation energy for the reaction
is one of the reactants of the reaction
Answers
The glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.
Reaction of hydrogen gas and oxygenA chemical reaction involves the combination of two or more substances to yield a new substance which is different from the starting materials. It may also involve the break up a substance.
Since energy is required for a chemical reaction to take place, the glowing splint in the reaction of hydrogen gas and oxygen gas to form water provides the activation energy for the reaction.
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One liter of helium gas has a mass of 2.3 grams at STP. True or false
Answers
Answer:
n=V/Vm
n=1/22.4
n=0.044 moles He
m=n×M
m=0.044×4
m=0.178 g False
A solution is made by mixing 50.0 mL of liquid A with 75.0 mL of liquid B. Which is the solute, and which is the solvent? Is it valid to assume that the volume of the resulting solution will be 125 mL? Explain your answer.
Answers
If two liquid solutions are mixed together, the solute would be the one with the lower volume while the solvent would be the solution with the higher volume.
What are liquid solutes?The mixing of two liquids requires that one is a solute while the other is a solvent.
Thus, the solution with the higher volume acts as the solvent while the one with the lower volume act as the solute.
For example, a solution made by mixing 25% water with 75% alcohol has water as the solute and alcohol as the solvent.
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Write the balanced Ka and Kb reactions for HSO3- in water. Be sure to include the physical states of each species involved in the reaction.Ka:_________Kb:_________NOTE: Use the chemical equation editor tool to input the physical states. Do not subscript the physical states of the compounds.
Answers
Answer:
Ka = [H₃O⁺] [SO₃²⁻] / [HSO₃⁻]
Kb = [OH⁻] [H₂SO₃] / [HSO₃⁻]
Explanation:
An amphoteric substance as HSO₃⁻ is a substance that act as either an acid or a base. When acid:
HSO₃⁻(aq) + H₂O(l) ⇄ H₃O⁺(aq) + SO₃²⁻(aq)
And Ka, the acid dissociation constant is:
Ka = [H₃O⁺] [SO₃²⁻] / [HSO₃⁻]When base:
HSO₃⁻(aq) + H₂O(l) ⇄ OH⁻(aq) + H₂SO₃(aq)
And kb, base dissociation constant is:
Kb = [OH⁻] [H₂SO₃] / [HSO₃⁻]Why will the results be slow for test on the possible solutions for decreasing the impact of human activities on the ocean shores zones?
A. It will be slow because you will have to wait for control
B. It will be slow because you will have to wait for natural processes to affect each area
C. It will be slow because you will have to wait for more human activity within the area
D.It will be slow because you will have to wait to build sand dunes
Answers
B. It will be slow because you will have to wait for natural processes to affect each area.
What is Ocean?
An ocean is a vast body of saltwater that covers more than 70% of the Earth's surface. Oceans are the largest bodies of water on our planet and are essential for supporting life on Earth. Oceans play a crucial role in regulating the Earth's climate, absorbing heat and carbon dioxide, and generating oxygen.
The impact of human activities on ocean shores zones, such as coastal development, pollution, and overfishing, can have long-lasting and sometimes irreversible effects on these ecosystems. Restoring or mitigating the impacts of human activities on ocean shores zones requires time and effort, as natural processes need to take place to restore the affected areas.
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Determine the empirical formula for C6H3Br3.
Answers
Answer:
C2HBr
Explanation:
The empirical formula is like the simpliest form so divide all by 3 and get the above formula.
Which of the following is a characteristic of living things.
1. They obtain and use material and energy.
2. They grow & develop 3They respond to their environment.
4. They are made up of complex & organized cells
5. All the above are characteristics of living things
Answers
Answer:
I would say all of the above
Explanation:
I say this because we use material and energy, we grow and develop, we are made up of cells, and we respond to the environment.
A gas occupies 1.00 L at 273 K. What is the volume at 606 °C?
Answers
Answer:
3.22 L
Explanation:
0.00 C = 273 K
k = C +273
606 K + 273 K = 879 K
879/273 = 3.219
V2 = 3.22 L
calculate the weight 'm' grams of 5.6L of chlorine gas cl2 at NTP.
Answers
The weight of 5.6 L of chlorine gas Cl₂ at NTP is 17.75 grams
How do i determine the weight of the chlorine gas at NTP?The volume of a gas at normal temperature and pressure, NTP, is given as
22.4 L = 1 mole of a gas
With the above information, we can obtain the weight (in grams) of the 5.6 L of chlorine gas Cl₂. This is shown below.
The following data were obtained from the question:
Volume chlorine gas, Cl₂ at NPT = 5.6 L1 mole of chlorine gas, Cl₂ = (2 × 35.5) = 71 gramsWeight of chlorine gas =?At normal temperature and pressure, NTP, the volume of chlorine gas is given as follow:
22.4 L = 1 mole of chlorine gas, Cl₂
22.4 L = 71 grams of chlorine gas, Cl₂
Therefore,
5.6 L = (5.6 L × 71 grams) / 22.4 L
5.6 L = 17.75 grams of chlorine gas, Cl₂
Thus, we can conclude from the above calculation that the weight of the gas at NTP is 17.75 grams
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3. The area indicated by the blue arrow is a stream. In which direction does this stream flow?
Explain.
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The viscosity, which affects the amount of friction between water molecules, also plays a role. Despite the low viscosity of water, friction is still a problem. All moving fluids constantly lose energy as a result of rubbing against their surroundings. Water will move from high-energy regions to low-energy ones.
When it comes to confined aquifers, the situation becomes much more complicated, but we still need to understand how they function because they are significant water sources. demonstrates that even if the geological materials at the surface have very low permeability, there is always a water table. This aquifer will have its own "water table," which is actually called a potentiometric surface because it is a measure of the total potential energy of the water, wherever there is a confined aquifer, which is one that is separated from the surface by a confining layer. The potentiometric surface for the confined aquifer as a red dashed line. It represents the total energy that the water is under. inside the restricted aquifer. The water will rise to the water table if we drill a well into the unconfined aquifer. But if we drill a well into the confined aquifer through both the confining layer and the unconfined aquifer, the water will rise to the level of the potentiometric surface above the top of the confined aquifer. Due to the fact that the water rises above the aquifer's surface, this is referred to as an artesian well.
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What is the compound name for this compound structure?
Answers
The compound name for the compound structure given in the question is 2, 3-dimethlypentane
IUPAC nomenclatureThe international union of pure and applied chemistry (IUPAC) has organised a principle by which organic compounds are named. This principle includes:
Identify the functional group Locating the longest continuous carbon chain. This gives the parent name of the compound. Identified the substituent groups attached Give the substituent groups the lowest low count Combine the above to get the nameHow to name the compound The functional group is alkane since it contains only single bonds The longest continuous carbon chain is 5. Thus the parent name is pentane. Two methyl (CH₃) groups are attached The methyl (CH₃) groups are located at carbon 2 and 3The name of the compound is 2, 3-dimethlypentaneLearn more about IUPAC nomenclature:
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6. Observe the reaction below and choose the best answer which completes the
reaction.
C-C=C + HOH ===> ?
(will you be able to determine the answer?)
Answers
Answer:
The answer to this reaction would be C-C-OH + H2.
2. A plane travels 65 m/s for 300 km to its destination. How long did the plane travel to reach its destination? Give your answer in minutes.
heeelp
Answers
A plane travels 65 m/s for 300 km to its destination and will take 76.923 min to reach the destination.
Given data:
Speed = 65m/s
Distance = 300 km = 300000 m
Time= ?
Speed can be calculated by using the formula:
Speed = Distance/ Time
65 = 300000/ time
Time= 300000/65
= 4615.38 s
Time taken to reach the destination = 76.923 min
Therefore, the plane will take time travel to reach the destination 76.923 min.
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Covalent bonds are formed from the sharing of valence electrons.
• true or false
Answers
Answer:
true
Explanation:
it ture because it true
URGENT plz im confused
Answers
Answer:C I think
Explanation:
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What are the possible values of 1 and m for
n=4 ?
Answers
Answer:
If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?