Answers
The ranking of the acids from strongest to weakest is: B) HI > A) HCl > D) H2S > C) H2O
To rank the acids from strongest to weakest, we need to consider their acid dissociation constants (Ka) or their respective pKa values. The lower the pKa value, the stronger the acid.
Here are the acids listed from strongest to weakest:
B) HI: Hydroiodic acid has a very low pKa value, indicating that it is a strong acid. It readily dissociates in water to release hydrogen ions (H+). HI is stronger than the other acids in the list.
A) HCl: Hydrochloric acid is also a strong acid with a low pKa value. It dissociates almost completely in water to produce H+ ions.
D) H2S: Hydrogen sulfide is a weak acid compared to HI and HCl. It has a higher pKa value, indicating that it does not dissociate as completely in water as the previous two acids. However, it still donates some hydrogen ions and exhibits acidic properties.
C) H2O: Water is considered a neutral substance with a pKa of 14. It can act as a weak acid or a weak base depending on the reaction it is involved in. In this list, it is the weakest acid. While it can donate a proton to form H+ ions, its tendency to do so is significantly lower compared to the other acids.
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Related Questions
12 Igneous rocks are formed by (1) sedimentation (2) fossilization (3) volcanic activity (4) freezing/thawing cycles
Answers
According to the research, the correct option is 3, Igneous rocks are those formed from a molten product from volcanic activity.
What are Igneous rocks?They are rocks of high resistance, isotropy, brittleness and density that are created from the cooling and solidification of the magma, whether fragmented or compact, that form at erupting volcanoes, that is, this substance, made up of molten rocks and other elements, is found inside the planet.
When the cooling process takes place superficially and quickly, extrusive igneous rocks are produced, among which are obsidian and basalt, they usually appear after the eruption of a volcano, since the ejected lava solidifies.
Therefore, we can conclude that according to the research, the correct option is 3, Igneous rocks are those formed from a molten product from volcanic activity.
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Without doing any calculations, match the following thermodynamic properties with their appropriate numerical sign for the following endothermic reaction. 2N2(g) + O2(g)2N2O(g) Clear All > 0 Hrxn < 0 Srxn = 0 Grxn > 0 low T, < 0 high T Suniverse < 0 low T, > 0 high T
Answers
Answer:
∆H > 0
∆Srxn <0
∆G >0
∆Suniverse <0
Explanation:
We are informed that the reaction is endothermic. An endothermic reaction is one in which energy is absorbed hence ∆H is positive at all temperatures.
Similarly, absorption of energy leads to a decrease in entropy of the reaction system. Hence the change in entropy of the reaction ∆Sreaction is negative at all temperatures.
The change in free energy for the reaction is positive at all temperatures since ∆S reaction is negative then from ∆G= ∆H - T∆S, we see that given the positive value of ∆H, ∆G must always return a positive value at all temperatures.
Since entropy of the surrounding= - ∆H/T, given that ∆H is positive, ∆S surrounding will be negative at all temperatures. This is so because an endothermic reaction causes the surrounding to cool down.
Can someone explain the Glyceraldehyde structure for me in detail please. I read that the first carbon atom is the only asymmetric one out of all three carbons and that the other two carbons do have four attachments that just aren’t different. I can’t even see how the atoms have four attachments though.
Answers
Answer:
Glyceraldehyde is a simple sugar with three carbon atoms attached to hydroxyl and hydrogen or carbonyl groups. The first carbon atom has four different groups, including an aldehyde group, which makes it asymmetric. This results in two stereoisomers, D-glyceraldehyde and L-glyceraldehyde, that are mirror images of each other and have opposite optical activities.
The central carbon atom in glyceraldehyde is called the chiral or asymmetric carbon atom, because it has four different groups attached to it: a hydrogen atom (-H), a hydroxy group (-OH), a methyl group (-CH3) and a carbonyl group (-CHO). The presence of these four different groups attached to the chiral carbon atom means that there are two possible stereoisomers of glyceraldehyde, which are called D-glyceraldehyde and L-glyceraldehyde.
In D-glyceraldehyde, the hydroxy (-OH) group is located on the right side of the asymmetric carbon atom, while in L-glyceraldehyde, the hydroxy group is located on the left side of the asymmetric carbon atom. This property of having mirror-image isomers is known as chirality, and it is an important aspect of organic chemistry.
The other two carbon atoms in glyceraldehyde also have four attachments, but they are not chiral. This means that the four groups attached to each of these two carbon atoms are not different, and therefore, these two carbon atoms do not have stereoisomers like the chiral carbon atom.
To visualize the structure of glyceraldehyde, you can draw a straight line to represent the backbone of the molecule, with the three carbon atoms in a row. Then, you can draw the four different groups attached to the chiral carbon atom (hydrogen, hydroxy, methyl, and carbonyl) coming off of it in different directions. The other two carbon atoms will also have a hydroxy and a hydrogen group attached to them, but they will be in the same orientation as the hydroxy and hydrogen groups on the chiral carbon atom, since they are not chiral.
What is the percent composition of hydrogen in dihydrogen monoxide
Answers
The percent composition of hydrogen in dihydrogen monoxide is 11.11 %.
Dihydrogen monoxide is the scientific name of water ( H₂O ). so, the dihydrogen monoxide is the right name for water but very rarely used.
molecular mass of H₂O = 2 + 16 = 18 g
in one mole of water there is two 2 atoms of hydrogen and 1 atom oxygen.
Therefore , percent composition of hydrogen in dihydrogen monoxide is give as :
percent composition of H = (2 / 18 ) × 100 %
= 11.11 %
thus, The percent composition of hydrogen in dihydrogen monoxide is 11.11 %.
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Molecular distances are given in picometers, where 1 pm is equivalent to 1 x 10-12 meter.If the distance between carbon atoms in a diamond is 1.54 x 10-8 cm, what is this distance in picometers
Answers
Answer:
Distance = 154 pm
Explanation:
Given that,
The distance between carbon atoms in diamond is \(1.54\times 10^{-8}\ cm\)
We need to find the distance in pm.
We know that,
\(1\ pm=10^{-12}\ m\)
\(1.54\times 10^{-8}\ cm=1.54\times 10^{-8}\times 10^{-2}\ m\\\\=1.54\times 10^{-10}\ m\)
Multiplying and dividing by 10⁻².
\(d=1.54\times 10^{-10}\times \dfrac{10^{-2}}{10^{-2}}\\\\=154\times 10^{-12}\ m\\\\=154\ pm\)
So, the distance is 154 pm.
3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4H₂O
In the above equation how many moles of NO can be made when 75 moles of HNO3 are
consumed?
Answers
As per the given statement 0.297mol NO can be made when 75 moles of HNO3 are consumed
What is HNO3?The inorganic substance with the formula HNO3 is nitric acid. It is a mineral acid that is quite corrosive. The substance is colourless, but older samples have a tendency to have a yellow cast because of breakdown into nitrogen oxides..
'3 Cu + 8HNO3 3 Cu(NO3)2 + 2 NO + 4H₂O
Element Molar Mass
Hydrogen 1
Nitrogen 14
Copper 63.5
Oxygen 16
Referring the above table we get no of moles in HNO3
1(1.0) + 1(14) + 3(16) = 1 + 14 + 48 = 63 g/mol
75g HNO3 x 1 mol HNO3/63 g HNO3 = 1.190 mol HNO3
The coefficient of HNO3 is 8, and NO is 2
1.190 mol HNO3 x 2 mol NO/8 mol HNO3 = 0.297mol NO
Hence, 0.297mol NO can be made when 75 moles of HNO3 are consumed.
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Draw the structural formula of the major product of the reaction of (S)-2,2,3-trimethyloxirane with MeOH, H . Use the wedge/hash bond tools to indicate stereochemistry where it exists. Include H atoms at chiral centers only. If a group is achiral, do not use wedged or hashed bonds on it.
Answers
Answer:
(S)-3-methoxy-3-methylbutan-2-ol
Explanation:
In this case, we have an epoxide opening in acid medium. The first step then is the protonation of the oxygen. Then the epoxide is broken to generate the most stable carbocation. The nucleophile (\(CH_3OH\)) will attack the carbocation generating a new bond. Finally, the oxygen is deprotonated to obtain an ether functional group and we will obtain the molecule (S)-3-methoxy-3-methylbutan-2-ol.
See figure 1
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In which substance are the electrostatic forces between molecules the strongest?
(1 point)
O acetone
O propane
O turpentine
O glycerin
Answers
Answer:
Explanation:
glycerin
Give the coordination number and charge of the central metal ion of the complex cation and then, separately, the complex anion in the coordination compound [cr(nh3)6][cr(cn)6].Give a systematic name for the following formula: [cr(nh3)6][cr(cn)6]
Answers
The coordination number and charge of the central metal ion of the complex cation [Cr(NH3)6]3+ in the coordination compound [Cr(NH3)6][Cr(CN)6] is 6 and 3+ respectively.
The coordination compound [Cr(NH3)6][Cr(CN)6] is composed of two ions: the complex cation [Cr(NH3)6]3+ and the complex anion [Cr(CN)6]4-. The complex cation [Cr(NH3)6]3+ is formed by the central metal ion, chromium (Cr), and six ammonia (NH3) molecules. The coordination number of the central metal ion in this complex cation is 6, which means it has six ligands (NH3) surrounding it. The charge of the central metal ion in this complex cation is 3+, which means it has lost 3 electrons. The complex anion [Cr(CN)6]4- is formed by the central metal ion, chromium (Cr), and six cyanide (CN) molecules. The coordination number of the central metal ion in this complex anion is 6, which means it has six ligands (CN) surrounding it. The charge of the central metal ion in this complex anion is 4-, which means it has gained 4 electrons. The systematic name for the formula [Cr(NH3)6][Cr(CN)6] is hexaamminochromium(III) hexacyanochromate(IV).
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Ge(NO2)2 whats the name of this formula?
Answers
Answer:
Germanium monoxide
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A light bulb consumes energy at a rate of 80
joules per second . How long in
seconds will it take for the light bulb to consume 2.30 ~ 105
in energy?
Answers
Answer:
2875 s
Explanation:
From the question given above, the following data were obtained:
Power (P) = 80 J/s
Energy (E) = 2.3×10⁵ J
Time (t) = ?
Power can simply be defined as the rate at which energy is used. Mathematically, power is expressed as:
Power = Energy / time
P = E/t
With the above formula, we can obtain the time taken for the bulb to consume 2.3×10⁵ J. This can be obtained as follow:
Power (P) = 80 J/s
Energy (E) = 2.3×10⁵ J
Time (t) = ?
Power = Energy / time
P = E/t
80 = 2.3×10⁵ /t
Cross multiply
80 × t = 2.3×10⁵
Divide both side by 80
t = 2.3×10⁵ / 80
t = 2875 s
Therefore, it will take 2875 s for the bulb to consume 2.3×10⁵ J of energy.
Chlorofluorocarbons are ?
A. colorless, odorless gases that prevent red blood cells from carrying oxygen to the body
B. man-made chemicals containing chlorine and fluorine that cause
ozone molecules to break down
C. chemicals produced in factories that are used to prevent air
pollution
D. molecules containing chlorine and fluorine that block UV radiation
from reaching the Earth
Answers
Chlorofluorocarbons (CFCs) are synthetic compounds that contain chlorine, fluorine, and carbon. They were widely used in the past as refrigerants, propellants in aerosol products, and foam-blowing agents. CFCs have been found to have a detrimental effect on the Earth's ozone layer when released into the atmosphere. They can reach the stratosphere, where they undergo a chemical reaction facilitated by ultraviolet (UV) radiation, resulting in the release of chlorine atoms. These chlorine atoms then participate in a destructive cycle that breaks down ozone molecules, leading to ozone depletion. Due to their harmful impact on the ozone layer, the production and use of CFCs have been phased out or regulated under international agreements like the Montreal Protocol to protect the Earth's ozone layer.
Chlorofluorocarbons (CFCs) are man-made chemicals containing chlorine and fluorine that cause ozone molecules to break down. Thus, option B is the answer.
Chlorofluorocarbons are non-toxic, synthetic compounds that contain atoms of Chlorine, Fluorine and Carbon. They are commonly used in the manufacture of aerosol sprays and are also used as solvents and refrigerants. CFCs were first introduced in 1928 by General Motors Company for its refrigerators.
While CFCs are very safe to use in most applications and are stable in the lower atmosphere, these chemicals when released to the upper atmosphere can cause significant reactions. CFCs when released into the upper atmosphere can lead to the destruction of the ozone molecules followed by the release of the UV radiation into the atmosphere.
Thus, CFCs are man-made chemicals which cause ozone molecules to break down.
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Calculate the number of moles of Cu in 1.25x10^25 atoms of Cu
Answers
Answer: 1.25.173.
Explanation:just caluate
what is the correct name of Fe(CN)3?
Answers
Answer:
Iron(III) Cyanide
a student assisting with the experiment would observe all of the following about the electron transport chain except:
Answers
A student assisting with the experiment would observe that all of the following statements about the electron transport chain are true EXCEPT: option (C) i.e. Every single electron carrier is movable and hydrophobic.
This statement is false because electron carriers in the electron transport chain can be hydrophilic or hydrophobic, and they may be mobile or anchored to a membrane. Their properties, such as hydrophobicity and mobility, depend on their specific role in the electron transport chain and the organisms they are found in.
1. In the ETC, carriers travel inside the inner mitochondrial membrane, passing electrons from one to another and pumping protons across the inner mitochondrial membrane.
2. Therefore, they are mobile. In order to travel inside the hydrophobic interior of the membrane, we would expect them to all be hydrophobic.
3. However, cytochrome c is a highly water-soluble protein, unlike other cytochromes.
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Question - A student assisting with the experiment would observe all of the following about the electron transport chain EXCEPT:
A. Electrons are passed from carriers with lower reduction potential to those with higher reduction potential.
B. The first electron carrier is also a proton pump.
C. Every single electron carrier is movable and hydrophobic
D. The electron carriers can transport a maximum of 2 electrons.
Question 11
Hydrogen peroxide (H₂O₂) and water (H₂O) both contain the elements Hydrogen and
Oxygen. Why are they different compounds?
Answers
Answer: Because
Explanation:
Will mark brainliest!!!! 15 pts!!!!Please solve these equations
Answers
reaction type: double replacement
2 Al(OH)3 + 3 H2SO4 = Al2(SO4)3 + 6 H2O
reaction type: double replacement
2 HCl + K2CO3 = 2 KCl + H2O + CO2
i think there are two reactions here, so double replacement and decomposition
2 AgNO3 + Na2CO3 = Ag2CO3 + 2 NaNO3
reaction type: double replacement
2 Al2O3 = 4 Al + 3 O2
reaction type: decomposition
What are the main sources of outdoor air pollution and how do they cause smog?
Answers
Answer:
The common sources of outdoor air pollution are emissions caused by combustion processes from motor vehicles, solid fuel burning and industry. Other pollution sources include smoke from bushfires, windblown dust, and biogenic emissions from vegetation (pollen and mold spores).
smog is produced when sunlight reacts with nitrogen oxides in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.
how much energy is required to heat 500g of ice at 0⁰C to 60⁰C?
a) 125,400 J
b) 167,000 J
c) 292,400 J
d) 41,883,600 J
Answers
The amount of energy needed to heat 500 g of ice at 0⁰C to 60⁰C is 292,400 J. Option C.
Energy of reactionIn order to calculate the energy required to heat the ice, we need to consider two stages: first, we need to calculate the energy required to melt the ice, and second, we need to calculate the energy required to heat the resulting liquid water to 60°C.
To melt the ice, we need to supply energy equal to the heat of fusion of ice. The heat of fusion of ice is 334 J/g. Therefore, the energy required to melt 500 g of ice is:
Q1 = (334 J/g) x (500 g) = 167,000 J
Once the ice is melted, we need to heat the resulting liquid water to 60°C. The specific heat capacity of water is 4.184 J/(g°C). Therefore, the energy required to heat 500 g of water from 0°C to 60°C is:
Q2 = (4.184 J/(g°C)) x (500 g) x (60°C - 0°C) = 125,520 J
The total energy required to melt the ice and heat the resulting liquid water to 60°C is the sum of Q1 and Q2:
Q = Q1 + Q2 = 167,000 J + 125,520 J = 292,520 J
Thus, the amount of energy needed to heat 500 g of ice at 0⁰C to 60⁰C is 292,400 J.
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Solid lithium hydroxide is used to "scrub" CO2 from the air inspacecraft and submarines; it reacts with the CO2 to produce lithium carbonate and water. What volume in liters of CO2 at 20°C and 753 torr can be removed by reaction with 440 g of lithium hydroxide?
Answers
Answer:
223 L
Explanation:
Step 1: Write the balanced equation.
2 LiOH + CO₂ = Li₂CO₃ + H₂O
Step 2: Calculate the moles corresponding to 440 g of LiOH
The molar mass of LiOH is 23.95 g/mol.
440 g × (1 mol/23.95 g) = 18.4 mol
Step 3: Calculate the moles of CO₂ that react with 18.4 moles of LiOH
The molar ratio of LiOH to CO₂ is 2:1. The reacting moles of CO₂ are 1/2 × 18.4 mol = 9.20 mol.
Step 4: Convert 20°C to Kelvin
K = °C + 273.15 = 20 + 273.15 = 293 K
Step 5: Convert 753 torr to atm
753 torr × (1 atm/760 torr) = 0.991 atm
Step 6: Calculate the volume of CO₂
We will use the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 9.20 mol × (0.0821 atm.L/mol.K) × 293 K / 0.991 atm
V = 223 L
Movement of Ocean water
Choose ALL that apply
A. none of the choices
B. Surface water at the poles is dense because of low temperatures and high salinity.
C. Differences in the density of seawater cause it to move.
D. This water sinks and moves toward the equator where it replaces less dense, warm water.
Answers
Answer:
I would go with
B. Surface water at the poles is dense because of low temperatures and high salinity.
i could be wrong tho.
Explanation:
what is neutron number
Answers
PLEASE PLEAS HELP I REALLY NEED IT
Answers
Answer:
A i took the quiz
Explanation:
A nuclear equation is balanced when?
Answers
A balanced nuclear reaction equation indicates that there is a rearrangement during a nuclear reaction, but of subatomic particles rather than atoms. Nuclear reactions also follow conservation laws, and they are balanced in two ways: The sum of the mass numbers of the reactants equals the sum of the mass numbers of the products.
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Between which two organisms is energy directly transferred?
a White spruce (tree) and coyote
b Soapberries (plant) and snowshoe hare
c Lynx (animal) and White spruce (tree)
d Red squirrel and snowshoe hare
Answers
The two organisms among which energy is directly transferred are d Red squirrel and snowshoe hare.
Between which two organisms is energy directly transferred?In ecosystems, energy is transferred because of interactions among different organisms that forms a complex web of relationships.
Here, the energy transfer directly occurs between red squirrel and snowshoe hare because the former feed on later by consuming the energy stored in the hare's body.
This direct transfer of energy from one organism to another is an example of a predator-prey relationship where energy is transferred through the food chain.
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The air temperature in a sealed, insulated box.. 20°C An ice cube at O'C is
placed in the box where it slowly melts. How and why does the melting of the ice
affect the air temperature in the box?
Melting is endothermic so the air temperature increases
Melting is exothermic, so the air temperature decreases
Melting is endothermic, so the air temperature decreases
Melting is exothermic, so the air temperature increases
Answers
Answer:
Melting is endothermic, so the air temperature decreases.
Explanation:
Hello there!
In this case, according to the given statement, it is possible to infer that the ice is melt because energy is applied to the ice and thereafter its temperature increases; this is possible because the joined particles of a solid substance need energy to undergo such a separation that they become more far away to each other and therefore transcend to the liquid phase due to the new molecules arrangement. Thus, the answer is Melting is endothermic, so the air temperature decreases because as the ice heats up, the air cools down as it gives it energy to the ice.
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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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what is the value of youth participating in volunteering
Answers
Answer:
Volunteering helps the teens gain new skills necessary for the job market such as leadership, communication skills, dependability, time management, and decision making.
Explanation:
The Hidden Values of Volunteering
Learn New Skills. One fantastic thing that volunteering can offer you is a new understanding of your own abilities. ...
Test for Your Future. An added side effect of volunteering is that it gives you an opportunity to try out possible careers, majors, and opportunities. ...
Meet New People. ...
Accomplish Something Important.
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Do all states of matter have thermal energy?
Answers
Explanation:
It is the motion of particles that creates a form of energy called heat (or thermal) energy that is present in all matter. Tiny particles in solids, liquids and gases are always in motion. It is the motion of particles that creates a form of energy called thermal (heat) energy that is present in all matter.
Which of the following is a property of acids?
Answers
Answer:
One of the properties of acids is their ability to donate protons (H+ ions) when dissolved in water
Explanation:
One of the properties of acids is their ability to donate protons (H+ ions) when dissolved in water. This property is referred to as acidity. Acids can also be described by the presence of positively charged hydrogen ions (H+) and a pH value below 7. Other properties of acids include their corrosive nature, sour taste, and ability to react with bases to form salts and water in a process called neutralization.