C2H6 has the higher vapor pressure. C4H10 and C2H6 are both nonpolar and thus have London dispersion forces only. C2H6 is a smaller molecule and thus has weaker dipole forces and a higher vapor pressure.
C2H6 has lower mass then C4H10 And alto Vander wall fond between C2H6 molecules is lever then that of C4H10. So C2H6 will be Lighter vapor pressure.
CH3CH2OH possess hydrogen Sending due to which they will be strongly attracted to each other as compared to CH3CH3F. So CH3CH3F will has high Lighter vapor pressure due to less attraction motion between them.
NH3 will also posse's hydrogen bonding. So PH3 will have higher vapor pressure.
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the reaction of 5.45 g of carbon with excess o2 yields 8.10 g of co2. what is the percent yield of this reaction? %
The percent yield of this reaction is 53.05 %.
From the question, we have
Moles of carbon = 5.25/12.011 = 0.437
Mass of carbon dioxide formed = mole*molar mass
= 0.437 mol*44g/mol = 19.228 g.
Percent yield = 10.2/19.228*100%
=53.05%
The percent yield of this reaction is 53.05 %.
mass in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force.
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the amount and the concentration of a salt solution is given. how much salt would you get if you evaporated all water from this solution?
If you evaporated all the water from this solution, you would receive 28 g and 3.4 g of salt; this is the quantity and concentration of a salt solution.
Are saline and salt water the same thing?
But the salt water found in the ocean is not the same as the bag of medicinal saline at the neighborhood hospital. Sodium chloride (table salt) and filtered water are used to make medical saline.
Can we consume salt water?
Seawater, in particular ocean water, contains a lot of salt and is not healthy to drink. Since we were designed to drink fresh water, drinking seawater can make us feel more dehydrated. In addition to making you thirstier, drinking salt water can seriously harm your body.
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what is the acidic level of a 100 liter tank thats 12% acid poured into a 50 liter tank that's 0% acid
The acidic level of liter tank is 8%.
Principle -
The reason this occurs is due to the large amount of energy released in the hydration reaction of sulfuric acid ions. Do not believe that heat comes from dissociation, as the dissociation of acids, bases, and salts always consumes energy. The energy is released from subsequent hydration. The energy released in this case will be absorbed by the small amount of water you are adding. As a result that water will splash out of the vessel carrying along with it particles of acid.In 50-LITRES of solution, there are 10 L of pure acid. After that, add "V" litres of water.10 is therefore equal to (50 V) x 8/100.Calculations-
So 10= 4 8V/100.
8V/100 = 10-4= 6.
V is therefore 6 x 100/8, 600/8, or 75 liters.
The percentage of acid decreases to 8% after adding 75 litres of water to the acid solution.
percent of acid in 125 liters of acid solution, which would contain 10 liters of pure acid.= 10/125 x 100 = 8%.
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showing the behavior of several different gases follow. which of these gases exhibit behavior significantly different from that expected for ideal gases?
Gases C, E and F exhibit behavior which is significantly different from that expected for an ideal gas.
What are Ideal gases?
An ideal gas is a hypothetical gas composed of molecules that have no interaction between them. It is assumed that the molecules are point-like, having no size or volume, and that they move in straight lines with constant velocity. The ideal gas law is an expression of the relationship between the pressure, volume, and temperature of a gas. It states that the pressure times the volume of a gas is proportional to the number of molecules in the gas and the temperature of the gas.
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the g.c. that you will be using uses a flame ionization detector and requires two gases, hydrogen and helium. what are the specific roles of each of these gases?
The gas chromatograph (g.c.) that you will be using employs a flame ionization detector and needs two gases, helium, and hydrogen. The carrier gas, which differs depending on the type of GC being utilized, is crucial. The carrier gas must be inert chemically, dry, and oxygen-free.
Polar chemicals, such as butanol, will be absorbed on the column and move slowly if we employ the polar stationary phase. If they are polar, they will flow slowly, but non-polar chemicals, such as hexane, will move quickly. Given that they will move quickly, this is for the polar stationary base. The scenario will be entirely reversed when the polar non-polar stationary column is present, hence in the non-polar stationary situation. The order will be reversed, causing polar and non-polar molecules to migrate quickly. They'll start by absorbing a lot of energy.
An analytical tool used in science to evaluate analytes in a gas stream is called a flame ionization detector (FID). It is commonly employed in gas chromatography as a detector. This is a mass-sensitive instrument since it measures the number of ions per unit of time. With the right hydrogen generator, a hydrogen carrier may be produced from water on demand and offers a larger range of optimal linear velocities or flows than helium. It is also less expensive. With FID, it is simple to adjust for the additional hydrogen carrier gas by lowering the detector hydrogen flow in proportion.
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A piece of gold, previously at room temperature, is placed in a water bath with a temperature of 100∘C. If we consider the gold to be the system and assume w constant, what is the outcome of this action?
a. heat flows out of the system and its internal energy decreases
b. heat flows out of the system and its internal energy increases
c. heat flows into the system and its internal energy decreases
d. heat flows into the system and its internal energy increases
Answer:
D. heat flows into the system and its internal energy increas
Explanation:
The question defines the system as the piece of gold. The answer will depend on the gold's perspective of what is happening. If we assume room temperature to be cooler than [tex]100^{o} C[/tex], then the gold will experience energy coming in until the tempeartures of both the water and gold are the same. As heat flows into the gold, its internal energy will increase. Option D seems to address both processes correctly.
what is pheoby supposed to tell the others? do you agree with this? how is hurston using pheoby? why?
Phenoby is supposed to tell others that, "Telling and giving understanding are two different things".
According to Phenoby mink is so valuable, but coon is not valuable, even though both are fur.
Janie implies that within a short period of time telling would be taken by people simply as passing sentence and would most likely will be forgotten.
On the other hand people's behavior can be changed to the better way of thinking by making people understand about the real fact.
Hence, Phenoby is supposed to say this to others.
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how much heat is required to heat a 18.4 g ice cube from –23.0 °c to –1.0 °c? specific heat of ice is 2.108 j/g °c.
The final temperature at which both become equal is 81.95°C.
What is Specific Heat?
The amount of heat needed to raise a substance's temperature by one degree Celsius in one gramme, also known as specific heat. Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.
The French scientists Pierre-Louis Dulong and Alexis-Thérèse Petit showed in the early 19th century that measurements of a substance's specific heat allow one to calculate their atomic weights.
45x0.88x(X-24)=-180×4.184×(X-85)
39.6X-950.4=-753.12X+64015.2
792.72X=6495.6
X=6495.6/792.72
X=81.95°C
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in some reactions forming a chalcone, it is possible to isolate the beta-hydroxyketone intermediate prior to dehydration. does this possibility suggest which step is the rate-determining step? yes or no. b. if so, which is the rate-determining step?
Yes because It is possible to isolate the beta-hydroxyketone intermediate in several chalcone-forming processes before dehydration.
Is the rate determining step the first step?The rate-determining step is a common feature of many response mechanisms. This step is significantly slower than the others. The rate law for the whole reaction may be determined directly from the molar ratio of the step's balancing equation if the rate-determining stage is really the first phase in a mechanism.
Why does the step that determines rate have to be the slowest?This is because a phase that moves slowly needs more time to complete since it may entail numerous other processes. As an illustration, a reactant would need to disseminate or migrating to a certain reaction site before the other reaction can occur, which then immediately creates a product.
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when the following events at the neuromuscular junction are put in proper sequence, the third event is
when the following events at the neuromuscular junction are put in proper sequence, the third event is neurotransmitter is released.
Across a synapse, a neuron releases a signalling chemical called a neurotransmitter to influence the other cell. Any major body component or target cell that receives the signal could be another neuron, a gland, or a muscle cell, among other possibilities. Your body cannot function without neurotransmitters, which are chemical messengers. From one neuron to the following target cell, they must transfer chemical messages.
A motor nerve's terminal end and a muscle form the neuromuscular junction (NMJ), which is a synaptic connection. From the nerve to the muscle, action potentials are transmitted there. The synapse between a neuron and a muscle is called a neuromuscular junction.
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does a reaction occur when aqueous solutions of potassium chloride and silver(i) acetate are combined?
Yes, a reaction will occur when aqueous solutions of potassium chloride and silver(I) acetate are combined. The reaction is as follows:
2KCl + AgC2H3O2 → K2C2H3O2 + AgCl
This reaction occurs because when aqueous potassium chloride and silver(I) acetate are combined, the positively-charged ions in the two compounds interact. The positively-charged potassium ions are attracted to the negatively-charged acetate ions, and the positively-charged silver ions are attracted to the negatively-charged chloride ions. This interaction causes the two compounds to form a neutral salt, potassium acetate, and silver chloride, both of which are insoluble in water.
What are aqueous solutions?Are solutions in which the solvent is water. They are formed when a solute, such as a salt, sugar, or acid, is dissolved in water. Aqueous solutions are a common form of solution used in chemistry and are found in many everyday products, such as:
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what is the empirical formula for a substance that is 12.67 % aluminum, 19.73% nitrogen, 67.60% oxygen
The empirical formula for a substance that is 12.67 % aluminum, 19.73% nitrogen, 67.60% oxygen is Al(NO₃)₃.
given that :
aluminum = 12.67 % = 12.67 g
nitrogen = 19.73 % = 19.73 g
oxygen = 67.60 % = 67.60 g
molar mass of aluminum = 12.67 / 26.98
= 0.46 mol
molar mass of nitrogen = 19.73 / 14
= 1.40 mol
molar mass of oxygen = 67.60 / 16
= 4.2 mol
divided by the smallest one , we get:
aluminum = 0.46 / 0.46 = 1
nitrogen = 1.40 / 0.46 = 3
oxygen = 4.2 / 0.46 = 9
The empirical formula is = Al(NO₃)₃
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f i start with 1.00 moles of nitrogen gas (n2) and an excess of hydrogen gas (h2) how many moles of ammonia can be produced? (what is the theoretical yield?)
One mole of Nitrogen gas will produce 2 moles of ammonia.
What is the purpose of ammonia?
Ammonia produced by industry is used as fertilizer in agriculture to the tune of 80%. In addition to these uses, ammonia is made into polymers, explosives, textiles, insecticides, dyes, and other chemicals. It is also used to purify water sources.
Can ammonia cause cancer?
Ammonia does not considered to be a cancer-causing substance. Ammonia has not been classified as carcinogenic by the EPA, the Department of Health and Human Services (DHHS), or the International Agency for Research on Cancer (IARC).
Briefing:
Hydrogen+Nitrogen→Ammonia
H2+N2-->NH3
Balancing the equation:
3H2+N2-->2NH3
So in an ideal 100% reaction
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does xef4 have polar bonds
Dear sir,
Your answer is as follows:
XeF4 does indeed have polar bonds.
I would very much appreciate it if you bestowed my answer the title of "Brainliest".
Best regards,
GrandDuke
Head of Department of Absurdly Pompous Answerers
Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH. The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C. The results of the experiment are represented in Figure 1.
Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment (pH near 6) to a basic environment will have on peroxidase activity?
Peroxidase activity will decrease.
for each pair of compounds, pick the one with the higher boiling point. explain your reasoning. cs2 or cse2
As molecular weight and ionic character increase, boiling point rises as well. Due to its greater mass and ionic character compared to CS₂, CSe₂ has a higher boiling point.
Boiling point definition:A substance's boiling point is the temperature at which it changes from a liquid to a gaseous or vapor state, where the two states are in equilibrium.
The molecular weight, bond type, temperature, and pressure of a substance all affect its boiling point. The 16th group of the oxygen family is where sulfur S and selenium Se both belong.
The covalent character decreases and the molecular weight rises as you move down a group. Se is the heaviest element in the sixteenth group and has a higher molecular weight than the other elements in the group.
Se has a higher boiling point due to its more ionic nature as well. Therefore, CSe₂'s boiling point is higher than CSe₂'s due to its higher mass and ionic character.
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what are the risks involved in using auctions to source malic acid? briefly explain with evidence from the case.
The main risks associated with using auctions to source malic acid from Betapharm include quality risk, price risk, delivery risk, and contractual risk.
1. Quality Control: Betapharm's malic acid was of a lower quality than expected, leading to product recalls and customer complaints. This could lead to financial losses and/or damage to Betapharm's reputation.
2. Price Risk: As the auction process is unpredictable, Betapharm may end up paying more than expected or receive a lower quality of malic acid than expected. This could lead to financial losses and/or damage to Betapharm's reputation.
3. Delivery Risk: Betapharm may not receive the malic acid on time, leading to delays in production and financial losses.
4. Contractual Risk: Betapharm may not have a clear contract in place with the supplier, leading to disputes and potential financial losses.
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Sodium bicarbonate reacts with hydrochloric acid in a gas-forming reaction to produce aqueous sodium chloride, water, and carbon dioxide gas: NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2(g) Determine the mass of CO2 gas produced when 8.28 g of NaHCO3 is added to a solution that contains 5.22 g of HCl.
4.44 g of carbon dioxide is produced Sodium bicarbonate reacts with hydrochloric acid in a gas-forming reaction.
The question provides us with a balanced chemical reaction and the masses of our reactants [tex]NaHCO_{3}[/tex] (8.28 g) and HCl (5.22 g). As we do not know which is the limiting reactant, we will start by converting the masses of both reactants to moles:
n = [tex]\frac{m}{M}[/tex]
Where, n = moles; m = mass; M = molar mass
The molar masses of [tex]NaHCO_{3}[/tex] and HCl are obtained by adding the atomic masses of each atom. The atomic masses are obtained from the periodic table:
[tex]M_{ NaHCO_{3} }[/tex] = (22.99g/mol)+(1.01g/mo)+(12.01g/mol)+(3×16.00g/mol)
=84.01g/mol
[tex]M_{HCL}[/tex] = (1.01g/mol)+(45.45g/mol)
=46.46g/mol
Now we can substitute the values in and solve:
[tex]n_{NaHCO_{3} }[/tex] = [tex]\frac{m}{M}[/tex] = [tex]\frac{8.28g}{ 84.01g/mol }[/tex]
= 0.958 mol
[tex]n_{HCL}[/tex] = [tex]\frac{m}{M}[/tex] = [tex]\frac{5.22g}{46.46g/mol}[/tex]
=0.112 mol
Next we will calculate the theoretical yield (in moles) of carbon dioxide from each reactant. In the process we will also determine the limiting reactant.
0.1 mol [tex]NaHCO_{3}[/tex] × [tex]\frac{1molCO2}{1molNaHCO3}[/tex] = 0.985 mol [tex]CO_{2}[/tex]
0.112 mol HCl× [tex]\frac{1molCO2}{1molHCL}[/tex] =0.112 mol [tex]CO_{2}[/tex]
From the results we can see the limiting reactant is
[tex]NaHCO_{3}[/tex] as it produces less [tex]CO_{2}[/tex]. As the limiting reactant determines the theoretical yield, this means 0.1 mol of [tex]CO_{2}[/tex] will be produced. To determine the mass of [tex]CO_{2}[/tex]
we will rearrange the formula we used earlier with the molar mass of [tex]CO_{2}[/tex].
[tex]M_{CO_{2} }[/tex] = 12.01g/mol + (2×16.00g/mol) = 44.01g/mol
m = [tex]\frac{n}{M}[/tex] = (0.958 mol)(44.01g/mol)=4.44 g
Therefore 4.44 g of carbon dioxide is produced
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why is it important to perform this reaction in a styrofoam cup? how might your results change if you used two styrofoam cups?
The only systems to conduct this reaction in a styrofoam cup are a drink in one with a lid and coffee in another with the lid closed.
We use Styrofoam cups because...
The best way to keep your drinks hot in the winter and chilled in the summer is in foam cups. Another useful industrial product is foam. In fact, foam products are used in most hospitals because they reduce contact with germs and other foodborne pathogens.
What exactly is a foam cup?
Styrofoam is a robust yet lightweight polystyrene (a form of plastic) foam. It's frequently used to create packing materials and coffee mugs for takeout. As a proprietary term, Styrofoam is typically capitalized. It is a form of lightweight,
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When the adhesive forces between a liquid and the walls of a capillary tube are greater than the cohesive forces within the liquid.
The liquid will rise above the surrounding liquid due to the attractions when the adhesive forces are stronger than the cohesive forces between a liquid and the walls of a capillary tube.
What is capillary tube?In a mechanism known as capillary action, liquid flows up into very thin tubes made of rigid materials such as plastic or glass termed capillary tubing or capillary tubes (capillarity). A tube used to regulate the flow of refrigerant that has an interior diameter and length that are calibrated. Additionally, it links the remote bulb to the thermostat and/or the thermostatic expansion valve.
What is capillary tube formula and its example?Surface tension is another factor that causes a liquid column inside of a tiny capillary tube to rise. (h)=2Trg is the formula for capillary rise.
Capillary action is exemplified by the uptake of water in porous materials like plaster and paper, the wicking of paint between brush hairs, and the transport of water through sand.
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consider the lewis structure for pcl3 . the lewis structure for pcl3. the central p has a single bond to each cl atom and a lone pair. each cl atom has 6 valence electrons. what are the approximate bond angles?
Lewis structure, also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that shown.
Hydrogen atoms form most effective unmarried bonds; they may be always at the ends of a chain of atoms. Hydrogen frequently is bonded to carbon, nitrogen or oxygen. Oxygen atoms typically do not bond to every other, besides for O2, O3, superoxides and peroxides.
Lewis structures, also known as Lewis-dot diagrams, display the bonding courting between atoms of a molecule and the lone pairs of electrons in the molecule. Lewis structures can also be useful in predicting molecular geometry in conjuntion with hybrid orbitals.
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How dose mass affect when objects collide??
which of the following nuclides would be expected to be particularly stable?a.calcium-40b.potassium-38c.argon-39d.chlorine-37
Calcium-40 would be expected to be particularly stable.
A nuclide is a type of atom distinguished by the number of protons and neutrons in its nucleus, which approximates the nuclide's mass. The number associated with the nuclide's name is known as its mass number (the total number of protons and neutrons in the nucleus).
The terms isotope and nuclide are closely related. When we talk about isotopes, we're talking about a group of nuclides that have the same number of protons. The term nuclide refers to a nuclear species that may or may not be isotopes of a single element. A nuclide is an atom with a specific number of protons and neutrons in its nucleus, such as carbon-13, which has 6 protons and 7 neutrons.
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how many liters of a 0.209m ki solution is needed to completly react with 2.43 g of cu(no3)2 according to the balanced chemical reaction
In accordance with the balanced chemical reaction, volume in L = 0.25 L of a 0.209m ki solution is required to upon and with 2.43 g of cu(no3)2.
Reaction: What does that mean?Chemical processes occur when atoms form or break chemical bonds. The molecules that start a chemical reaction are known as reactants, and the substances that are produced of the reaction are known as products.
What employs a response?Chemical changes create the preponderance of our power generation. Chemical reactions are used to test, identify, and evaluate a wide variety of materials. Examples include pool lab tests and forensic testing from series like "CSI."
Briefing:Mass of Cu(NO₃)₂ = 2.43 g
Volume of KI = ?
Balanced chemical equation:
4KI + 2Cu(NO3)2 = 2CuI + I2 + 4KNO3
Moles of Cu(NO₃)₂:
Mass x molar mass Equals number of moles
2.43 g/187.56 g/mol is the number of moles.
Number of moles = 0.013 mol
Cu(NO₃)₂ : KI
2 : 4
0.013 : 4 × 0.013=0.052 mol
Volume of KI:
amount in L = solute moles/molarity
volume in mol/mol/L = 0.052 mol/mol/L
volume in L = 0.25 L
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from the gc data, assign the signals to 2-methyl-2-butene and 2-methyl-1-butene. how were the assignments made?
A GC-MS produces muti data, including chromatograms for quantitative and qualitative analysis, mass spectra for confirming identity, identifying unknown analytes, and determining the structural and chemical properties of molecules.
What do you discover with GC-MS data?The GCMS uses a standard, or a proportion of the component that has already been established and has also been measured on the GCMS, to quantify the concentration of each chemical in a sample.
On a chart known as a chromatogram, a peak for each substance that the GC separates is used to symbolize it. The number of peaks reflects the sample's concentration of separated components. Each peak's location reveals the retention time of the compound.
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environmental agents such as nutrition and chemical exposure can alter gene expression by affecting the epigenome. epigenetic changes may also have important effects on behavior phenotypes. which of these examples correctly describe explicit evidence supporting epigenetic traits as heritable?
An example correctly describing explicit evidence supporting epigenetic traits as heritable is DNA methylation.
The epigenome can be impacted by environmental factors like a person's nutrition and exposure to contaminants. When cells divide, epigenetic alterations can be preserved from cell to cell and, in some situations, passed down through the generations. DNA methylation is a frequent epigenetic alteration type.
DNA methylation is an epigenetic modification, meaning it affects DNA without changing its sequence in any way. It modifies a gene's expression during cell differentiation and brings about a heritable alteration. Other potential environmental stressors that can alter epigenetic status include chemical and xenobiotic compounds in water or the atmosphere.
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If you travel from the United States to Spain, then you must have a passport. Can this be written as a biconditional? If so, what is the biconditional.
If you have a passport, then you travel from the United States to Spain.
You travel from the United States to Spain if and only if you have a passport.
You have a passport if and only if you travel from the United States to Spain.
This cannot be written as a biconditional.
Answer:
Explanation:
its b
what is the concentration of h2so4 if 12.3 ml of 0.200 m naoh solution is needed to neutralize 10.0 ml of h2so4 solution, ?
Concentration of h2so4 if 12.3 ml of 0.200 m naoh solution is needed to neutralize 10.0 ml of h2so4 solution is 0.123 M
What is neutralization reaction?
The term "neutralization" in the context of a chemical reaction refers to a reaction between an acid and a base or alkali. In the past, this reaction was denoted by the following equation: acid + base (alkali) salt + water.
For instance:
NaOH + HCl = NaCl + H2O
As long as it is acknowledged that the compounds involved are susceptible to dissociation in an aqueous solution, which alters the ionization state of the substances, the statement is still true. Because neutralization is a quantitative reaction and the reaction is complete, the arrow symbol,, is utilized. Brnsted-Lowry acid-base theory serves as the foundation for a more comprehensive definition.
A + BH = AH + B
Hence, concentration of h2so4 if 12.3 ml of 0.200 m naoh solution is needed to neutralize 10.0 ml of h2so4 solution is 0.123 M
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if effusion is described as the process where gas molecules exit a container through a small hole, which would you expect to have a greater chance of leaving first: a lighter atom or a heavier atom?
If effusion is described as the process where gas molecules exit a container through a small hole then lighter atom exist first.
Diffusion is the term used to describe the mixing of various gas molecules caused by random molecular motion and frequent collisions. The perfume odor that spreads when the stopper is removed can serve as an illustration of this. Similar processes include effusion, in which gas molecules pass through a small hole into a vacuum without colliding with one another. The rate of diffusion and effusion varies with the gas, primarily the size of the gas particle. As would be expected, particles effuse and defuse more quickly the smaller they are. Thomas Graham, a Scottish chemist, investigated and developed this theory and discovered that the rate of effusion of a gas is inversely proportional to the square root of its molar mass:
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I need help making a closing for my Gobi Desert.
Answer:
in conclusion the gobi dessert is one of the hottest desserts