Answers
An example of the bonds between hydrogen and oxygen is water. Remember that its formula is represented by 2 hydrogens and 1 oxygen (H2O).
This compound is a polar solvent, which means that it can solve ionic compounds easily.
This applies to other compounds with bonds between hydrogen and oxygen because their difference between the electronegativity indicates polarity.
In conclusion, ionic compounds can dissolve in polar solvents like bonds between hydrogen and oxygen.
Related Questions
strontium sulfate (s) + lithium iodide (aq)
Answers
strontium sulfate (s) + lithium iodide (aq) → strontium iodide (aq) and lithium sulfate (aq).
The reaction between strontium sulfate (SrSO4) and lithium iodide (LiI) can be represented by the following balanced chemical equation:
SrSO4 (s) + 2 LiI (aq) → SrI2 (aq) + Li2SO4 (aq)
In this reaction, strontium sulfate (SrSO4) in its solid state reacts with lithium iodide (LiI) in its aqueous state to produce strontium iodide (SrI2) and lithium sulfate (Li2SO4), both in their aqueous forms. The reaction can be understood by examining the ionic compounds involved. Strontium sulfate dissociates into strontium ions (Sr2+) and sulfate ions (SO4^2-), while lithium iodide dissociates into lithium ions (Li+) and iodide ions (I^-). The ions then rearrange to form the products, with strontium combining with iodide to form strontium iodide, and lithium combining with sulfate to form lithium sulfate. It's important to note that this reaction occurs in an aqueous solution, indicating that lithium iodide is dissolved in water. The solid strontium sulfate reacts with the aqueous lithium iodide to produce the aqueous products. This reaction demonstrates the chemical combination of the ions present in strontium sulfate and lithium iodide to form different ionic compounds.
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draw structure of 4-ethyl-2,2,7trimethyloctane?
Answers
An ethyl group is an alkyl substituent produced from ethane in chemistry (C2H6). It has the chemical formula -CH2CH3 and is frequently shortened to Et.
What is meant by chemical structure?When determining the chemical structure of a target molecule or other solid, chemists must also characterize the molecular geometry and, if possible and required, the electronic structure.When determining the chemical structure of a target molecule or other solid, chemists must also characterize the molecular geometry and, if possible and required, the electronic structure.Shell structures, frame structures, and solid structures are the three fundamental forms of structures.Examples of load-bearing constructions include salt domes, anthills, beaver dams, buildings, airplanes, and skeletons. The infrastructure of human society is made up of buildings and non-building structures that are the outcome of construction.Draw structure of 4-ethyl-2,2,7trimethyloctane:
An ethyl group is an alkyl substituent produced from ethane in chemistry (C2H6). It has the chemical formula -CH2CH3 and is frequently shortened to Et.
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What is [H*] in a 0.300 M solution
CH₂CHCOOH (Ka of acrylic acid, = 3.16 × 10^-5)?
![What is [H*] in a 0.300 M solutionCHCHCOOH (Ka of acrylic acid, = 3.16 10^-5)?](https://i5t5.c14.e2-1.dev/h-images-qa/contents/attachments/Ws59X7fnARwYZw624BD5xZ05fSGCaB7A.png)
Answers
Answer:
The concentration of [H₃O^+] in a 0.300 M solution of CH₂CHCOOH is 3.16 × 10^-5 M.
Explanation:
Acrylic acid (CH₂CHCOOH) is a weak acid with a dissociation constant (Ka) of 3.16 × 10^-5.
The dissociation of acrylic acid in water is:
CH₂CHCOOH + H₂O ⇌ CH₂CHCOO^- + H₃O^+
The equilibrium expression for this reaction is:
Ka = [CH₂CHCOO^-][H₃O^+] / [CH₂CHCOOH]
At equilibrium, the concentration of CH₂CHCOOH that has dissociated is equal to the concentration of CH₂CHCOO^-:
[CH₂CHCOOH] = [CH₂CHCOO^-]
Let x be the concentration of [H₃O^+] at equilibrium. Then, the equilibrium concentration of [CH₂CHCOO^-] is 0.300 - x, and the equilibrium concentration of [CH₂CHCOOH] is also 0.300 - x.
Substituting these concentrations into the equilibrium expression gives:
Ka = (0.300 - x) * x / (0.300 - x)
Simplifying this expression:
Ka = x
Solving for x:
x = [H₃O^+] = Ka = 3.16 × 10^-5 M
Therefore, the concentration of [H₃O^+] in a 0.300 M solution of CH₂CHCOOH is 3.16 × 10^-5 M.
Many ravines can be found in forested areas of the Cross Timbers ecoregion of Texas. What natural process most likely formed
these ravines?
OA. erosion by water during the rainy season
OB. erosion by wind during the dry season
OC. deposition by water during the rainy season
OD. deposition by wind during the dry season
Answers
Erosion by water during the rainy season can be a significant natural phenomenon. When it rains, water flows over the land, picking up soil particles and carrying them along with it.
What is water ?Water is a clear, colorless, odorless, and tasteless liquid that is essential for life. It is a chemical compound made up of two hydrogen atoms and one oxygen atom, with the chemical formula H2O. Water is the most abundant substance on Earth, covering approximately 71% of its surface.
Water is a unique substance because of its molecular structure, which allows it to exist in all three physical states - solid, liquid, and gas - at temperatures and pressures commonly found on Earth. It has a high heat capacity, meaning it can absorb and release large amounts of heat without changing temperature significantly. This property is important for regulating the Earth's climate and for maintaining the temperature of living organisms.
Water is essential for many biological processes, such as hydration, digestion, and metabolism. It also plays a crucial role in the Earth's water cycle, where it evaporates from bodies of water and plants, condenses into clouds, and falls back to the surface as precipitation.
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A solution containing 0.026 moles of H2O2 at 25.0 °C is placed in a coffee cup calorimeter and
allowed to decompose completely according to the thermochemical equation shown below. The final temperature of the solution is 44.9 °C. Calculate the enthalpy of the reaction shown, in kJ/mol. The mass of the solution is 30.0 g and the specific heat capacity of the solution
is 4.18 J/g°C.
CHEMICAL Formula is in the photo
Answers
The enthalpy (in kJ/mol) of the reaction, given that 0.026 moles of H₂O₂ at 25.0 °C is placed in a coffee cup calorimeter is 95.98 KJ/mol
How do i determine the enthalpy of the reaction?First, we shall determine the heat energy of the reaction. Details below:
Mass of solution = 30 gInitial temperature of statue (T₁) = 25 °CFinal temperature of statue(T₂) = 44.9 °CChange in temperature (ΔT) = 44.9 - 25 = 19.9 °C Specific heat capacity of solution (C) = 4.18 J/gºC Heat energy (Q) =?Q = MCΔT
Q = 30 × 4.18 × 19.9
Q = 2495.46 J
Finally, we shall determine the enthalpy of the reaction. Details below:
Heat absorbed (Q) = 2495.46 J = 2495.46 / 1000 = 2.49546 KJMole of H₂O₂ (n) = 0.026 moleEnthalpy of reaction (ΔH) =?Q = n × ΔH
2.49546 = 0.026 × ΔH
Divide both sides by 0.026
ΔH = 2.49546 / 0.026
ΔH = 95.98 KJ/mol
Thus, the enthalpy of reaction is 95.98 KJ/mol
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lewis structure of HONO2 (HNO3)
Answers
I really hope this diagram helped you.
If you have further questions don't hesitate to ask :)
A balloon held at 273 K has an initial volume of 2.0 L at 1.0 atm of pressure. If the pressure is increased to 3.5 atm, what is the new volume of the balloon?
Answers
Answer: 5.5 atm
Explanation:
Consider the following endothermic reaction:
C2H4(g)+I2(g)⇌C2H4I2(g)
Part A
If you were trying to maximize the amount of C2H4I2 produced, which of the following might you try? Assume that the reaction mixture reaches equilibrium.
Check all that apply.
adding C2H4 to the reaction mixture
removing I2 from the reaction mixture
decreasing the reaction volume
raising the reaction temperature
Answers
Answer:
The amount of C2H4I2 produced is maximized if
-Adding C2H4 to the reaction mixture
-Decreasing the reaction volume
-Also can include: raising the reaction temperature
To increase the amount of product in this reaction, add C₂H₄ to the reaction mixture and raise the reaction temperature.
What is an endothermic reaction?The reaction in which reactants absorb heat energy to forward the reaction is called endothermic reaction. Thus if raise the temperature, the more heat energy provided to the reactants and product amount increase.
According to Le-chatlier principle, If the equilibrium of a reaction is imbalanced by any factor, then the system tries to balance that and forms a new equilibrium state.
In accordance with this principle, to proceed to the forward direction that, if want more product in this reaction, then we have to increase the amount of reactant in the forward direction, i.e., C₂H₄.
Given this reaction is endothermic. So by increasing the temperature, we can increase the amount of product.
Therefore, option 1 and 4 are correct.
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I need help with solution
Answers
\(molar \: mass = 48 \\ element = cadmium\)
Answer:
A.) Titanium
Explanation:
The graph appears to be a mass spectrum. This graph describes the abundance of an element in a sample. The x-axis measures the mass of the element. As such, you can identify the element by determining which element has an atomic weight (g/mol) that matches the highest peak.
Titanium = 47.867 g/mol
Cadmium = 112.41 g/mol
Vanadium = 50.942 g/mol
The highest peak appears to be at 48. From these atomic weights, it seems that titanium is the element with the closest mass.
This graph is measuring an unknown element, so ideally, there would be only one peak. If this is a graph of one element, then why are their multiply smaller peaks? The smaller peaks are most likely isotopes or impurities.
how does terrain affect forest fires
Answers
The terrain can have a significant impact on the behavior and spread of forest fires. Understanding the terrain and its effect on fires can help firefighters and land managers develop effective strategies for preventing and managing wildfires.
How does terrain affect forest fires?
Terrain plays a significant role in the behavior and spread of forest fires. Here are some ways that terrain can affect forest fires:
Slope: The slope of the terrain can affect the speed and direction of the fire. Fires tend to spread faster uphill due to the preheating effect of the rising heat, which dries out the fuel and ignites it more easily. Steep slopes can also create a chimney effect, where hot gases and flames rise rapidly, increasing the intensity of the fire and making it more difficult to control.
Aspect: The aspect, or the direction that a slope faces, can also impact the behavior of a forest fire. South-facing slopes tend to be warmer and drier, and may ignite more easily. North-facing slopes, on the other hand, may be cooler and moister, and may not burn as easily.
Topography: The topography of the terrain can affect the spread of fire by creating wind patterns, funneling the fire, or obstructing firefighting efforts. For example, canyons, ridges, and valleys can channel and accelerate the spread of the fire, while cliffs, boulders, and waterways can create natural fire breaks that help to contain the fire.
Fuel type and density: The type and density of vegetation in a forest can vary depending on the terrain. For example, steep slopes may have thinner vegetation cover, while flat areas may have thicker vegetation. The type of vegetation can also vary by elevation, with lower elevations having more grasses and shrubs, and higher elevations having more trees. Different types of vegetation burn at different rates and temperatures, and can affect the intensity and behavior of the fire.
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balanced equation in which K2Cr2O7 oxidizes KI in the presence of H2SO4
Answers
The balanced equation \(K_{2}Cr_{2}O_{7}\) oxidizes KI in the presence of \(H_{2}SO_{4}\)can be represented as
6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)
The balanced equation for the oxidation of KI (potassium iodide) by \(K_{2}Cr_{2}O_{7}\)(potassium dichromate) in the presence of \(H_{2}SO_{4}\)(sulfuric acid) can be represented as follows:
6 KI + \(K_{2}Cr_{2}O_{7}\) + 7 \(H_{2}SO_{4}\) → 4 \(K_{2}Cr_{2}O_{7}\) + \(Cr_{2}(SO_{4})_{3}\) + 3 \(I_{2}\)\(I_{2}\) + 7 \(H_{2}O\)
In this equation, \(K_{2}Cr_{2}O_{7}\) is the oxidizing agent, and KI is the substance being oxidized. The sulfuric acid (\(H_{2}SO_{4}\)) serves as a catalyst and provides the necessary acidic conditions for the reaction to occur.
The products of the reaction are potassium sulfate (\(K_{2}SO_{4}\)), chromium(III) sulfate (\(Cr_{2}(SO_{4})_{3}\)), iodine (), and water (\(H_{2}O\)).
Note that this equation represents a stoichiometrically balanced equation, ensuring that the number of atoms of each element is the same on both sides of the equation.
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Dr. Simmons wants to make sure her scientific investigation is considered good. She knows that for an experiment to produce valid results, it must adhere to accepted methods. Which procedure would she not include as part of her valid scientific experiment?
a) organized procedures
b) controlled surroundings
c)precise observations
d) uncontrolled variables
Answers
The procedure that Dr. Simmons will not include as part of her scientific experiment is uncontrolled variables.
When a scientific investigation is carried out, experiments are used as a method of verifying results. Generally, when an experiment is carried out, you want to verify that given circumstances generate a specific result.
The experiments must be as controlled as possible so that they can be repeated and thus create reliable laws. Therefore, Dr. Simmons will not include uncontrolled variables in her experiment, because these variables can modify the result of an investigation in many ways and limit the production of new knowledge.
Uncontrolled variables are generally not included in scientific investigations because they cannot be modified and they influence various results that cannot be considered reliable knowledge.
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Consider the reaction between copper(II) chloride and aluminum.Write the general skeleton reaction.Write the balanced reduction half reaction.Write the balanced oxidation half reaction.Write the balanced net ionic equation.Write the full balanced redox reaction.
Answers
Answer:
• General skeleton reaction:
\(CuCl_{2}+Al\operatorname{\rightarrow}AlCl_{3}+Cu\)• Balanced reduction half reaction:
\(3Cu^2+6e^-\operatorname{\rightarrow}3Cu^0\)• Balanced oxidation half reaction:
\(2Al^0\operatorname{\rightarrow}2Al^3+6e^-\)• Balanced net ionic equation:
\(3Cu^{+2}+2Cl^{-1}+2Al^0\operatorname{\rightarrow}3Cu^0+2Al^{+3}+3Cl^{-1}\)• Full balanced redox reaction:
\(3CuCl_2+2Al\rightarrow2AlCl_3+3Cu\)Explanation:
1st) It is necessary to write the skeleton reaction (unbalanced reaction):
\(CuCl_2+Al\rightarrow AlCl_3+Cu\)In the reaction, copper (II) chloride react with aluminum to produce aluminum chloride and copper.
2nd) We need to know the oxidation number of each atom in the reaction, then we can find the element that oxidized and the element that id reduced:
Oxidation numbers:
+2 -1 0 +3 -1 0
\(CuCl_{2}+Al\operatorname{\rightarrow}AlCl_{3}+Cu\)With the oxidation number we can see that Al goes from 0 to +3, so the aluminum atom oxidizes. And, the copper atom goes from +2 to 0, so it is reduced.
3rd) To write the balanced reduction half reaction, it is necessary to balance all elements except oxygen and hydrogen (in this case, there is no oxygen or hydrogen atoms).
\(Cu^{+2}+2e^-\rightarrow Cu^0\)Then, it is important to balance the electrons in each half reaction, so in the Cu half reaction we have to multiply everything by 3:
\(\begin{gathered} (Cu^2+2e^-\operatorname{\rightarrow}Cu^0)*3 \\ 3Cu^2+6e^-\operatorname{\rightarrow}3Cu^0 \end{gathered}\)4th) To write the balanced oxidation half reaction, we have to proceed like in the previous step:
\(Al^0\rightarrow Al^{+3}+3e^-\)We have to balance the electrons here too, but in this case we have to multiply by 2:
\(\begin{gathered} (Al^0\operatorname{\rightarrow}Al^3+3e^-)*2 \\ 2Al^0\operatorname{\rightarrow}2Al^3+6e^- \end{gathered}\)Note: Electron balance is done to cancel out the electrons in both reactions, so we need to have the same number of electrons on each side of the half reactions.
5th) Now, we can write the balanced net ionic equation, without the electrons:
\(3Cu^{+2}+2Cl^{-1}+2Al^0\operatorname{\rightarrow}3Cu^0+2Al^{+3}+3Cl^{-1}\)6th) Finally, we can write the full balanced redox reaction, including the other elements, in this case Cl:
\(3CuCl_2+2Al\rightarrow2AlCl_3+3Cu\)
when burning magnesium is lowered in a gas jar full of carbon 4 oxide it continued to burn explain
Answers
When burning magnesium is lowered in a gas jar full of carbon dioxide, the burning process continues because the carbon dioxide acts as an oxidizing agent.
What is a combustion reaction?A combustion reaction is a type of chemical reaction that occurs when a fuel, such as a hydrocarbon, reacts with an oxidizing agent, such as oxygen, to produce heat and light in the form of a flame. The basic equation for a combustion reaction is:
Fuel + Oxidant → Heat + Light + Products
In the case of burning magnesium, the fuel is magnesium and the oxidant is carbon dioxide. The products of the reaction are magnesium oxide and carbon dioxide. Combustion reactions are exothermic, meaning they release energy in the form of heat.
This means that the carbon dioxide provides the oxygen necessary for the combustion reaction to continue, allowing the magnesium to continue burning. Additionally, the carbon dioxide also helps to extinguish the flame by removing the heat and the oxygen from the combustion zone.
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Question 5 categorizing things involves assigning items to categories. identifying themes takes those categories a step further, grouping them into broader themes or classifications.
Answers
This exercise is related to the subject of Structured Thinking. See the definition of structured thinking below.
What is structured thinking?The process of developing a structured framework to address an unstructured situation is known as structured thinking.
Structured thinking is a strategy of problem-solving that entails breaking a huge problem into smaller ones in order to tackle the larger problem more quickly and effectively.
Categorizing things and identifying themes are two subjects under structured thinking.
What does Categorizing things involve?To categorize anything requires:
putting things into categoriesgiving goods a grade.identifying the differences between things.What does Identifying themes involve?Identifying themes entails:
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Is carbon an organic compound?
A.
Yes – it contains carbon
B.
Yes – all compounds are organic
C.
The question can't be answered with the information given.
D.
No – it is not a compound: it's an element.
Answers
carbon is an elements ,The compounds of carbon are called an organic compounds.
Carbon have tendency to catenation. catenation means forming bond with another carbon atom and form a long chain of carbon. This is the reason for the presence variety of number of organic compounds. The atomic size of carbon is small and have the valency of four, forms covalent bond. Carbon is strong and stable. Generally carbon containing compound are organic compounds. Generally all the Organic compounds contain carbon and hydrogen called as hydrocarbon.
Thus, carbon is an elements ,The compounds of carbon are called an organic compounds.
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1.00 gram of a compound requires the following quantities of solvent to dissolve: 147.0 mL of water, 8.10 mL of chloroform, 37.0 mL of diethyl ether, or 86.0 mL of benzene. Calculate the partition coefficient of the compound between chloroform and water, ethyl ether and water, and benzene and water. Which solvent would you choose to extract the compound from an aqueous solution?
Answers
Answer:
Partition coefficients are:
Chloroform-Water: 18.1
Diethyl ether-Water: 3.97
Benzene-Water: 1.71
You would choose chloroform to extract the compound
Explanation:
Partition coeffcient is defined as the ratio between solubility in g/mL of an organic compound and concentration of the solubility in an aqueous solution.
Solubility of the compound in the solvents is:
Water: 1g / 147.0mL = 6.80x10⁻³g/mL
Chloroform: 1g / 8.10mL = 0.123g/mL
Diethyl ether: 1g / 37.0mL = 0.0270g/mL
Benzene: 1g / 86.0mL = 0.0116g/mL
Partition coefficients are:Chloroform-Water: 18.1Diethyl ether-Water: 3.97Benzene-Water: 1.71The higher partition coefficient, the best extraction because the compound will have more affinity with this solvent in which the compound has the best solubillity.
Chloroform has the higher partition coefficient because has the higher solubility. That means chloroform is the solvent you would choose to extract the compound from an aqueous solution
Which of these waves has the greatest wavelength? (3 points) Wave shown with 2 wavelengths. Wave shown with 3 wavelengths. Wave shown with 1 wavelength stretch over a short distance. Wavelength shown with 1 wavelength stretched over a long distance.
Answers
The waves that has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.
Waves explained.A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.
Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.
Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.
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What is the molecular equation for HNO3 + NaOH
Answers
Answer:HNO3 + NaOH = NaNO3 + H2O is a neutralization reaction (also a double displacement reaction). The strong acid (HNO3) and strong base react to produce a salt (NaNO3) and water (H2O).Type of Chemical Reaction: For this reaction we have a neutralization reaction. Balancing Strategies: Here is a neutralization reaction. The HNO3 and NaOH combined and form a salt and water.
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Explanation:
What do the sections between the lines on a phase diagram represent? A. The areas in which the kinetic energy of a substance is constant B. The regions in which temperature and pressure change a substance's phase C. The conditions in which a substance exists in a certain phase D. The ranges where temperature and pressure are constant in a substance SUBMIT
Answers
The sections between the lines on a phase diagram represent Option B. The regions in which temperature and pressure change a substance's phase .
A phase diagram is a graphical representation that shows the conditions at which a substance exists as a solid, liquid, or gas.
It is a graph that represents the relationship between pressure and temperature under which a substance exists as a solid, liquid, or gas.
The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.
Answer: B. The regions in which temperature and pressure change a substance's phase.
Explanation:A phase diagram is a graphical representation of the state of matter that exists under certain conditions of pressure and temperature.
A phase diagram is also known as a phase equilibrium diagram, a phase transition diagram, or a P-T diagram (pressure-temperature).
A phase diagram has three regions, solid, liquid, and gas, which are separated by phase boundaries.
Each boundary represents the conditions of temperature and pressure under which a phase change occurs.
The triple point is the point where all three phases coexist.
The critical point is the point at which the gas and liquid phases become indistinguishable.
The sections between the lines on a phase diagram represent the regions in which temperature and pressure change a substance's phase.
These sections are also called phase boundaries or phase transitions.
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Complete and balance the molecular equation for the reaction of aqueous iron(III) nitrate, Fe(NO3)3 , and aqueous lithium hydroxide, LiOH. Include physical states. molecular equation: Fe(NO3)3(aq)+LiOH(aq)⟶
Enter the balanced net ionic equation for the reaction. Include physical states. net ionic equation:
Answers
The molecular equation for the reaction of aqueous iron(III) nitrate and aqueous lithium hydroxide is :
Fe(NO3)3(aq) + 3LiOH(aq) ⟶ Fe(OH)3(s) + 3LiNO3(aq)
By removing the spectator ions from the molecular equation—ions that appear on both sides of the equation but do not participate in the reaction—we can derive the balanced net ionic equation for the reaction. The spectator ions in this instance are Li+ and NO3-.
The net ionic equation is :
Fe3+(aq) + 3OH-(aq) ⟶ Fe(OH)3(s)
Be aware that solid Fe(OH)3 is created when the ions Fe3+ and OH- mix. Equations with (aq) for aqueous species and (s) for solid species denote the physical states.
Which of the following is an example of an unbalanced force?
A stroller being pushed
A ball on the grass
A chair leaning on the wall
A book sitting on a table
Answers
Answer:
A. A stroller being pushed
Explanation:
The person pushing the stroller is putting more force than the stroller is.
You kick your friend in the face with a force of 120 N. Your foot's mass was 4 kg.
How much was your foot accelerating at that time?|
I
Answers
Answer:
20m/s²
Explanation:
Step 1: rearrange the formula N=ma: a=N/m
Step 2: divide 120 by 4: 20m/s²
Hope that helps
HC2H3O2 (aq) + H2O (l) ⇔ C2H3O2- (aq) + H3O+ (aq) Ka = 1.8 x 10-5
Calculate the [H3O+] if the [HC2H3O2] = 0.035 M and the [C2H3O2- ] = 0.22 M.
Answers
The concentration of [H3O⁺]=2.86 x 10⁻⁶ M
Further explanationIn general, the weak acid ionization reaction
HA (aq) ---> H⁺ (aq) + A⁻ (aq)
Ka's value
\(\large {\boxed {\bold {Ka \: = \: \frac {[H ^ +] [A ^ -]} {[HA]}}}}\)
Reaction
HC₂H₃O₂ (aq) + H₂O (l) ⇔ (aq) + H₃O⁺ (aq) Ka = 1.8 x 10⁻⁵
\(\tt Ka=\dfrac{[C_2H_3O^{2-}[H_3O^+]]}{[HC_2H_3O_2]}}\\\\1.8\times 10^{-5}=\dfrac{0.22\times [H_3O^+]}{0.035}\)
[H₃O⁺]=2.86 x 10⁻⁶ M
How many atoms are present in a 0.600- mole sample of gold?
Answers
Two liquids, A and B, have equal masses and equal initial temperatures. Each is heated for the same length of time over identical burners. Afterward, liquid A is hotter than liquid B. Which has the larger specific heat? Two liquids, A and B, have equal masses and equal initial temperatures. Each is heated for the same length of time over identical burners. Afterward, liquid A is hotter than liquid B. Which has the larger specific heat? Liquid A. There's not enough information to tell. Liquid B.
Answers
Answer:
Liquid A.
Explanation:
Specific heat is defined as the amount of heat required per unit of mass to raise the temperature by one degree celsius.
When two liquids are heated, the liquid with larger specific heat is the one which is hotter. That is because is required more energy to decrease its temperature by 1°C.
Thus, in the problem, liquid A has the larger specific heat
2.
Which mixture could be a useful buffer in a solution?
acetic acid (CH3CO2H) and hydrochloric acid (HCl)
sodium hydroxide (NaOH) and elemental sodium (Na)
ammonia (NH3) and ammonium chloride (NH4Cl)
acetic acid (CH3CO2H) and ammonia (NH3)
Pls answer quickly
Answers
Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C
A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.
In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.
Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.
Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.
Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).
The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.
Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.
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how many electrons are necessary to produce a charge of "-0.80" C
Answers
Answer:
5.0x10^18
Explanation:
What is true about dominant alleles? a They almost never appear as the trait. b They appear as the trait only when there are two of them c They appear as the trait over a recessive allele d They appear as the trait if there is not recessive allele
Answers
They appear as the trait over a recessive allele. Statement C) is true about the dominant alleles.
Dominant alleles are genetic variants that, when present in an individual's genotype, are expressed phenotypically, meaning they determine the visible or observable traits. Dominant alleles are represented by capital letters, while recessive alleles are represented by lowercase letters in genetics.
In terms of inheritance, if an individual has at least one copy of the dominant allele, it will be expressed in the phenotype, regardless of the presence of a recessive allele. This is because dominant alleles exert their influence over recessive alleles, thus "dominating" their expression.
To illustrate this, let's consider a specific example using a trait controlled by a single gene with two possible alleles: dominant (A) and recessive (a). If an individual is homozygous dominant (AA), meaning they possess two copies of the dominant allele, the dominant trait will be expressed.
However, if an individual is homozygous recessive (aa), with two copies of the recessive allele, the recessive trait will be expressed since there are no dominant alleles to override it.
Therefore, dominant alleles appear as the trait over recessive alleles, regardless of the presence or absence of a recessive allele. The presence of even a single copy of the dominant allele is sufficient for its expression in the phenotype. Option C
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A soot particle is a bunch of atoms combined together.
Answers
INFORMATION:
We need to determine what type of atoms combined form a soot particle
STEP BY STEP EXPLANATION:
To answer that, we nee to know that:
- soot is a mass of impure carbon particles resulting from the incomplete combustion of hydrocarbons. A typical carbon content of soot is between 90 and 98%.
So, a soot particle is a bunch of carbon atoms combined together.
ANSWER:
A soot particle is a bunch of carbon atoms combined together.