Figures for such simple sugars' esterification reactions with That is -5.61 kj/mol and the typical Kinetic free energy "G" reaction.
What are free energy of Gibbs and entropy?Entropy is a unit of measurement for the amount of heat that diffuses or is communicated during a chemical reaction. How is it has said Gdp energy is free? Gibbs energy is frequently referred as as inspiration and self to initiate a chemical reaction and is evaluated at constant pressure and temperature.
Gibb's spontaneous energy is often called free energy because it is always available. The reaction can acquire this energy if necessary without making any effort. To calculate the variance in Gibb's free energy, hysteresis and the system's total heat and entropy are added.
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you have one mole of each of these atoms: carbon-12, oxygen-16, and uranium-235. Which substance has more atoms
One mole of each element contains Avogadro's number of atoms, which is 6.022 x 10^23 atoms. Therefore, all three substances have the same number of atoms, which is 6.022 x 10^23 atoms.
milk of magnesia is an oral alkaline suspension of hydrated magnesium carbonate in water and can be used as an antacid. where is it absorbed?
Milk of magnesia is typically absorbed in the stomach and small intestine. As an antacid, it neutralizes stomach acid, which can help to relieve symptoms of indigestion and heartburn.
Milk of magnesia is an oral suspension of hydrated magnesium carbonate in water. It is used as an antacid to neutralize stomach acid and relieve symptoms of indigestion and heartburn. It is typically taken by mouth and is absorbed in the stomach and small intestine. It is not absorbed into the bloodstream and does not have a systemic effect on the body. It can also be used as a laxative.
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Predict the products when 1-propanol is heated in the presence of an acid? There are two products. I have one of them 1-propene, what is the second product?
The result of heating 1-propanol with in absence of an acid is 1-propene. In two processes, 1-propene is created from 1-propanol.
What applications does propanol have?
It helps with anxiety, treats cardiac issues, and shields against migraines. Propranolol is a medication that can be used to manage high blood pressure when you have a heart condition. Treat diseases like atrial fibrillation that result in an irregular heartbeat (arrhythmia).
Is propanol poisonous?
Consuming 1-propanol can result in death, loss of consciousness, slowing breathing and heartbeat, and bewilderment. Exposure to the skin may result in allergic or inflammatory reactions. Children, adolescents, & adults who may consume contaminated products are at a high risk of formaldehyde or 1-propanol poisoning.
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what is the molarity of 2500 ml of a solution that contains 160 grams of ammonium nitrate (nh4no3)? group of answer choices 0.600m 0.800m 0.333m 0.450m
The molarity of 2500 ml of a solution that contains 160 grams of ammonium nitrate (nh4no3) is 0.600M.
What is molarity?Molarity is a measure of the concentration of a solution. The concentration of a solution can be determined by measuring the mass of the solute and the volume of the solution. Molarity is a useful measure when trying to understand how much of a solute is present in a given volume of solution. It can be used to compare the strength of different solutions, and also to calculate how much solute is required for a given volume. Molarity is an important concept in chemistry and is used in many areas of science.
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It takes 18.48 mL of a 1.66 M phosphoric acid solution to neutralize 298.70 mL of lithium hydroxide solution. What is the concentration of the lithium hydroxide solution?
The concentration of the lithium hydroxide solution is 0.034 M.
What is the solution about?To find the concentration of the lithium hydroxide solution, we can use the balanced equation for the neutralization reaction between phosphoric acid and lithium hydroxide:
H₃PO₄ + 3LiOH -> Li₃PO₄ + 3H₂O
We can also use the stoichiometry of the reaction to determine the number of moles of lithium hydroxide that were neutralized by the phosphoric acid. Since the ratio of moles of acid to moles of base is 1:3, we can use the following formula:
C(LiOH) = (moles of LiOH) / (volume of LiOH in liters)
To find the moles of LiOH, we can use the volume and concentration of the phosphoric acid:
moles of H₃PO₄
= (18.48 mL) * (1.66 M)
= 30.6248 moles
moles of LiOH
= (30.6248 moles) * (1 mol LiOH / 3 mol H₃PO₄)
= 10.2083 moles
To find the concentration of the lithium hydroxide solution, we can divide the moles of LiOH by the volume of LiOH:
C(LiOH) = (10.2083 moles) / (298.70 mL * 0.001 L/mL) = 0.034 M
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If the rate of consumption of magnesium is 5.0 × 10^-9 mol/s. find the rate of consumption of HCl in moles/s
In order to find the rate of consumption of HCl in moles/s, you would need to know the balanced equation for the chemical reaction involving magnesium and HCl.
One common reaction is the reaction between magnesium and hydrochloric acid:
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
If the rate of consumption of magnesium is 5.0 × 10^-9 mol/s, this means that 5.0 × 10^-9 moles of magnesium are being consumed per second. In this reaction, one mole of magnesium reacts with 2 moles of HCl, so for every mole of magnesium consumed, 2 moles of HCl are also consumed.
Therefore, the rate of consumption of HCl in moles/s can be calculated by multiplying the rate of consumption of magnesium by 2:
rate of consumption of HCl = (rate of consumption of Mg) * 2
rate of consumption of HCl = (5.0 x 10^-9 mol/s) * 2 = 1.0 x 10^-8 mol/s
So the rate of consumption of HCl in moles/s is 1.0 x 10^-8 moles/s.
Part A
Enter the Ksp expression for A2B3(s) in terms of [A] and [B].
Part B
Enter the Ksp expression for AC4(s) in terms of [A] and [C].
Express your answer in terms of [A] and [C], for example, [X]*[Y]^2.
The Ksp expression for A2B3(s) in terms of [A] and [B] is Ksp, the Ksp Equation for the specified solid is Ksp = 4x3.
How is KSP determined?Ksp = [a] [b]2, where Ksp is the maximum amount of solute that can dissolve at equilibrium. If you make x=a, you know that b=2x because there is twice as much b as a. Molar solubility is merely another word for molarity. These values for both a and b in respect of x allow you to calculate Ksp as [x] [2x]2, which equals Ksp=4x3.
∠K=∠K [Common]
∴ △KNP∼△KML [By AA-criterion of similarity]⇒ KMKN =
ML
NP
[∵ Corresponding sides of similar triangles are proportional] ⇒ b+cc= ax⇒x= b+cac
KSP=[x] [2x]2:
What does it mean?You may make Ksp equal to [x] [2x]2 with all those values a and conversely in terms of x, which implies that Ksp equals [x] [4x]3.
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A student attaches a glass bulb containing neon gas to an open-tube manometer (like the one in Fig. 3A.5) and calculates the pressure of the gas to be 0.890 atm. (a) If the atmospheric pressure is 762 Torr, what height difference between the two sides of the mercury in the manometer did the student find
The difference between the two is the height of the mercury in the manometer (0.170 atm).
What is mercury?Mercury has the chemical symbol Hg and the atomic number 80. It was formerly known as hydrargyrum, derived from the Greek phrase hydor (water) as well as argyros (silver) (silver). Mercury is the one metallic element known to just be liquid at normal temperatures and pressures; the only other element known to be liquid under such conditions is indeed the halogen bromine, tho metals including caesium, gallium, but also rubidium melt a little above room temperature.
The height difference between the two sides of the mercury in the manometer that the student found was 0.890 atm - 762 Torr = 0.170 atm. This is because the pressure of the gas in the bulb (0.890 atm) is higher than the atmospheric pressure (762 Torr).
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through stoichiometric calculations, the theoretical yield of iron(iii) oxide was calculated to be 12.3 g. however, when massed after the reaction, only 10.7 g of iron(iii) oxide had been produced. what is the percent yield of iron(iii) oxide?
The amount that would be produced by the reaction if it were complete is known as the theoretical yield. yield in percentage: 0.15 / 0.16 x 100 = 93.75%
In eleventh-grade chemistry, what is a reaction?Chemical Response: Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
What category does the reaction fall under?Combination, decomposition, single-replacement, double-replacement, and combustion are the five fundamental types of chemical reactions. You can classify a reaction into one of these groups by looking at the reactants and products. Several categories will apply to some reactions.
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samples of two pure substances are heated at a constant rate, and their temperature as a function of time is recorded. both substances started as solids and melted. the mass of the two samples is the same. is the melting point of substance a (i) greater than, (ii) less than, or (iii) equal to the melting point of substance b? explain your reasoning.
Prior to melting, both compounds were solids at first. Both samples were the same mass. The melting point of substance A is the same as that of substance B.
Two pure substance samples are heated continuously, and temperature is measured as a function of time. Melting point is the temperature at which a substance changes state from a solid to a liquid (or, less frequently, liquefaction point). At the melting point, there is an equilibrium between the solid and liquid phases. Chemicals that are produced by the chemical industry can be divided into three groups based on the volume of production: bulk chemicals, fine chemicals, and chemicals found. Prior to melting, both components were solids at first. Both samples were the same mass. The melting point of substance A is the same as that of substance B.
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which point on the potential energy diagram corresponds to the species shown to the right for the electrophilic nitration of benzene with hno3/h2so4
Point (c) C on the potential energy diagram corresponds to the species shown to the right for the electrophilic nitration of benzene with hno3/h2so4.
There have been many other observed substitution reactions involving benzene; the five reactions that have proven to be the most beneficial are described here (chlorination and bromination are the most common halogenation reactions). The term "Electrophilic Aromatic Substitution" is usually used to refer to these reactions since the chemicals and conditions that are used in them are electrophilic. In order to carry out the first stage of the substitution reaction, the catalysts and co-reagents are used to produce the powerful electrophilic species that are required. The particular electrophile that was hypothesized to have a role in each distinct type of reaction is presented in the column to the right.
Point C on the potential energy diagram corresponds to the species shown to the right for the electrophilic nitration of benzene with hno3/h2so4.
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Demand-pull inflation occurs when
the price of goods rises suddenly and extremely fast.
consumers begin purchasing more goods.
producers need more money to make and distribute goods.
the government prints more money and pushes prices up
Demand-pull inflation occurs when: C. producers need more money to make and distribute goods.
What is demand pull inflation?Demand pull inflation occur when there is no balance in aggregate demand and aggregate supply and this tend to occur when the demand for goods and service is higher that the supply.
Demand pull inflation arise when people have the money to buy goods but the goods or product in the market is not sufficient leading to scarcity of goods due to large demand of that goods in the market.
Based on this demand pull inflation tend to rise because producers or manufacture need more money to produce and distribute goods so as to equate demand and supply.
Therefore we can conclude that the correct option is C.
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how does the size of the family affect meal plan
The size of the family affects meal planning by determining the quantity of food needed and the number of people to serve.
Does a larger family require more meal planning and preparation compared to a smaller family?Yes, a larger family typically requires more meal planning and preparation compared to a smaller family. This is because a larger family typically requires more food and ingredients, and often a wider variety of meals to accommodate different dietary needs and preferences. Additionally, a larger family may have more mouths to feed and therefore require more frequent meals and snacks throughout the day. Meal planning and preparation for a larger family can be more time-consuming and demanding, but with the proper organization and planning, it can be manageable.
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a chemsit has a 70ml of 50% methane solution. how much of an 80% solution must she add to get a 60% solution
70 ml of 50% hydrocarbon solutions and 35 milliliter of 80% methane solutions must be combined.
Describe methane.Hydrocarbon methane (CH4) seems to be a main constituent of natural gas. Because methane is a contributor to global warming (GHG), its presence within the atmosphere has an impact on the planet's climate and temperature. There are many industrial (influenced by humans) and natural sources that release methane.
Where can you find methane?Large environmental sources of formaldehyde include termite digestion, emissions from waterways and oceans, and ocean currents. Agricultural output, landfills, raising of cattle and other animal animals (cow burps! ), and energy production are examples of sources that are related to activity.
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in a hydrogen atom which transition would emit the longest wavelength light? select all that apply 1. n
The wavelength will be longer the higher the magnitude of the fundamental quantum number to which the electron is hopping. Thus, the longest wavelength is produced by the n = 6 to p = 8 transition.
How would one describe wavelengths?The length of a wave is expressed by its wavelength. The wavelength is the distance between one wave's crest and the following wave's crest. The wavelength can also be determined by measuring from the "trough" (bottom) of one wave to the "trough" of the following wave.
Why is wavelength significant and what is it?The distance that a wave repeats is measured by its wavelength. The letter lambda () stands for these recurrences, also known as wavelengths. Energy travels through a medium as waves (like the atmosphere, the vacuum, or even the ocean).
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the empirical formula of a compound is no2. its molecular mass is 92 g / mol. what is its molecular formula.
The substance, whose empirical formula is NO2 and whose molecular mass is 92 g/mol, has the molecular formula N2O4 (dinitrogen tetroxide).
What exactly are empirical formulas?Empirical formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of the atoms. This would be the compound's element with the smallest whole number ratio.
molecular formula = empirical formula × n
where "n" is the total number of components required to construct a molecular formula.
molar mass of your compound is 92 g/mol (Given)
It implies that molar mass of every atom in that molecule must equal 92 g/mol.
1×14.0067 g/mol + 2×15.9994 g/mol = 46.0055 g/mol
So, if one building block has a molar mass of 46.0055 g/mol, how many would you need to get the molecule?
46.0055 g/mol × n = 92 g/mol
n = 92g/mol / 46.0055 g/mol = 1.99976 ≈ 2
As a result, the substance's molecular formula, which includes a list of each atom that constitutes a molecule, will be
(NO2) × 2 = N2O4 (dinitrogen tetroxide)
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Which compound exhibits the strongest overall intermolecular forces
Answer: The correct answer is Option A. Compound Y will have the highest boiling point.
Intermolecular forces are the forces that hold the molecules of compounds together. The more the strength of these forces is more will be the force of attraction between them. Hence a compound having stronger intermolecular forces will be hard to break or boil.
So a compound having strong intermolecular force will have a high boiling point as it takes more energy to break apart these molecules.
In the given question compound Y has highest boiling point so it has the maximum intermolecular force between its atoms or molecules.
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10 g of an unknown compound is added to water to form a 7.89 molar solution. if two liters of solution are present, what is the molar mass of the unknown compound?
10 g of an unknown compound is added to water to form a 7.89 molar solution. if two liters of solution are present, the molar mass of the unknown compound is 0.64 g/ mol.
Given that :
The mass of the compound = 10 g
The molarity of the compound = 7.8 M
The volume = 2 L
The number of the moles = molarity × volume in L
= 7.89 × 2
= 15.78 mol
The molar mass = mass / moles
= 10 / 15.78
= 0.64 g/mol
Thus, the molar mass of the given unknown compound is 0.64 g/mol.
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Draw Lewis structures for the N-methylidenehydroxylamine molecule (CH2NOH), the methylamine molecule (CH3NH2), and the acetonitrile molecule (CH3CN) in the window below, and then answer the questions that follow, based on your drawings.Draw one structure per sketcher box. Separate added sketchers with + signs from the dropdown menu.b.) What is the bond order of the carbon- nitrogen bond in the N-methylidenehydroxylamine molecule? (enter a number)c.)Which species has the longest carbon-nitrogen bond, CH2NOH, CH3NH2, or CH3CN?methylamineacetonitrileN-methylidenehydroxylamined.) Which species has the weakest carbon - nitrogen bond, CH2NOH , CH3NH2, or CH3CN ?methylamineacetonitrileN-methylidenehydroxylamineShow Approach
The carbon-nitrogen link in the N-methylidene hydroxylamine molecule has a bond order of 2.
What is a molecule, for instance?A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules. For instance, the symbols for the oxygen atom and molecule are O and O2, respectively.
What makes something a molecule?Its original definition, "the smallest unit of a substance that yet preserves the qualities of that substance," was intended to be encompassed by this designation. "An atom is a body that cannot be cut in two; a molecule is the smallest conceivable component of a specific substance," wrote James Maxwell in 1873 when defining atom and molecule.
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The work of expanding a gas. Compute the total work performed when expanding an ideal gas, at constant temperature, from volume V to 2V.
The total work performed is nRT * 0.693
The work done by an ideal gas during an expansion at a constant temperature from volume V to 2V can be calculated using the equation work = nRT * ln(Vf/Vi).
Where n is the number of moles of gas, R is the ideal gas constant, T is the temperature, Vf is the final volume and Vi is the initial volume.
In this case, the initial volume is V and the final volume is 2V, so
the work done is nRT * ln(2V/V).
Since ln(2) is equal to 0.693, the work done is nRT * 0.693. Keep in mind, this equation is only true for certain types of gas at specific temperatures and pressures.
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state the colour universal indicator would turn in the oven cleaner.
We know that oven cleaners are basic in nature ranging pH from 11-13 and hence can change the universal indicator Blue or purple.
What is Universal indicator?An indication that may be used to determine whether a solution is acidic or basic is known as a universal indicator.It is a pH indicator made of a solution of several chemicals that displays multiple smooth colour changes over a broad pH range.While there are a number of universal pH indicators that are commercially available, Yamada's patented formula is used in the majority of them.Chemical Abstracts has information on this patent available. In the Journal of Chemical Education, experiments with Yamada's universal indicator are also covered.A universal indicator often contains the following ingredients: water, 1-propanol, phenolphthalein, sodium hydroxide, methyl red, bromothymol blue, sodium bisulfite, and thymol blue.An basic solution is one that is coloured blue or violet, while an acidic solution is one that is coloured yellow to red A solution that is coloured green .To learn more about universal indicator from the given link
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the kw for water at 0 °c is 0.12× 10–14. calculate the ph of a neutral aqueous solution at 0 °c.
The pH of a neutral aqueous solution at 0 °c will be 7.46.
In case of H2O, the concentration of hydronium ions, or H⁺, will be equal to the concentration of the hydroxide ions i.e [H⁺] = [OH⁻].
Remember, Kw = [H⁺][OH⁻] for water and if [H⁺] and [OH⁻] are both equal, we can easily solve by taking the square root of Kw.
[H⁺] = sqrt(0.12*10^-14) = 3.46*10^-8
(2 sig figs. Keep some extra so there will be not a rounding error.)
and remember that pH = -log[H⁺] = -log(3.46*10^-8) = 7.46
(The rules for sig figs are that if you take the log of a number with x significant figures, then the result will have x significant decimal places.)
The pH of water is 7.46
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what is going on in the mantle and it’s connection to the feature on the surface ?
The motion of material is what is going on in Earth's mantle, powered by heat from the deep interior, moves tectonic plates on our planet's surface and this motion generates earthquakes, fuels volcanic activity, and shapes surface landscapes.
What is a Mantle?This is referred to as a layer inside a planetary body bounded below by a core and above by a crust and it is usually made up of rocks or ice which undergoes various forms of motion.
The motion which goes on in the mantle is as a result of the force which is generated from the heat in the deep interior which moves tectonic plates on our planet's surface as depicted in the diagram given.
The result is the formation of earthquakes, fuels volcanic activity, and and it also shapes the surface landscapes thereby making it the reason why it was chosen as the correct choice.
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Label each reactant and product in this reaction as a Bronsted acid or base.
HCN + NH2- >><< CN- + NH3
This indicates that it is a proton acceptor, which qualifies it as a Bronsted base.
What is Bronsted base?Any species that can accept a proton and needs one pair of electrons to bond to the H+start text, H, end text, start superscript, plus, end superscript is referred to as a Brnsted-Lowry base. Since water is amphoteric, it can function as both a Brnsted-Lowry acid and a base. A Bronsted-Lowry base is a compound that can accept a hydrogen ion, whereas a Bronsted-Lowry acid can donate one. A Lewis base is a substance that can give up two electrons, whereas a Lewis acid can take in two electrons.
Here,
It qualifies as a Bronsted base because this suggests that it is a proton acceptor.
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What is the key difference between test and negative control groups in an experiment?
The key difference between test and negative control groups in an experiment is that Control groups check the mean effectiveness of an intervention whereas test use the technique of matching.
Assigning people on the basis of chance ensures that both known and unknown invalidating factors are cancelled out, and that this occurs automatically rather than being dependent on individual judgment and trustworthiness. In behavioral and social (as well clinical) research, the ideal scientific experiment is a so-called randomized controlled trial, briefly an RCT.
Members of control groups are not supposed to develop group cohesion because that would entail a contaminating factor in the experiment. Researchers are interested in the average response of individual members rather than in their behavior as a group (see Clinical Trials and Intervention Studies).
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Donald is writing a chemical name from a chemical formula. He has just identified that there are five atoms of oxygen bonded with two atoms of phosphorus.
What is the chemical name of Donald's compound?
Phosphorus pentoxide is the chemical name for a molecule in which five oxygen atoms are bound to two phosphorus atoms (P2O5).
What is the purpose of phosphorus pentoxide?A potent drying & dehydrating agent is phosphorus pentoxide. P2O5 can be used in a wide range of processes, including the dehydrating of amides to nitriles, which requires for the elimination of a water molecule.
Why is P2O5 a component of fertiliser?Triple super phosphate is the name given to the concentrated superphosphate, which contains 46% P2O5. It is possible to use this fertiliser on any soil and with any crop. It should be used along with organic manure on acidic soils. It may be used prior to, during, or after transplantation.
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Given the following reaction:
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
How many grams of Ag will be produced from 5.00 g of Cu and 1.00 g of AgNO3?
Answer:
0.648 g of Ag ( silver) is produced
Explanation:
First calculating the moles of the reactants given;
Cu = 5/64 = 0.078 moles
Mr ( molecular mass) of AgNO3 = 108 + 14 + (16 x 3)
= 170 g
Now the moles of AgNO3 ;
1/170 = 0.006 moles
setting up mole ratio to calculate the limiting reactant:
moles of Cu : moles of Ag
1 : 2
0.078 : X
X = 0.078 x 2
= 0.156 moles of Ag
moles of AgNO3 : moles of Ag
2 : 2
0.006 : X
X = (0.006 x 2)/2
= 0.006 moles of Ag
As silver nitrate ( AgNO3) gives the least number of moles of Ag therefore it is the limiting reactant and would control the amount of product formed.
Now the mass of Ag formed:
atomic mass x moles
= 108 x 0.006
= 0.648 g of Ag ( silver) is produced
a solution was prepared by dissolving 105.0 g of kcl in 215 g of water. what is the molality (in m) of kcl in this solution?
Considering the definition of molality, the molality of the KCl in the solution is 6.56 moles/kg.
Molality, or molal concentration, is the amount of a substance dissolved in a given mass of solvent. It is defined as the moles of a solute per kilogram of solvent.
The Molality of a solution is determined by the expression:
molality= number of moles of solute÷ kilograms of solvent
Molality in this case
In this case, you know:
mass of KCl= 105 g
mass molar of KCl= 74.55 g/mole
number of moles of solute= mass of KCl÷ mass molar of KCl= 105 g÷ 74.55 g/mole= 1.41 moles
Mass of solvent = 215 g of water= 0.215 kg (being 1000 g=1 kg)
Replacing in the definition of molality:
Molality= 1.41 moles÷ 0.215 kg
Molality= 6.56 moles/kg
The molality of the solution is 6.56 moles/kg.
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a 40 mg sample of phosporus reacts with 77.6 mg sample of selinum to for the cpmpound phosphourous selenide. what is the emperical formula of phosphurus
Phosphorus interacts with selenium to generate 77.6 mg of the compound from a sample of 40 mg of phosphorus. Therefore, phosphorus selenide has an empirical formula is P₃Se₁.
A compound's empirical formula is a formula that displays the ratio of the elements contained in the compound but not the precise number of atoms present in the molecule.
The molar mass of phosphorus (P) is 31 g/mol and selenium (Se) is 79 g/mol. Then, computing the moles of phosphorus, we get,
[tex]\begin{aligned}\text{moles of P}&=\mathrm{0.04\;g}\times\mathrm{\frac{1\;mole}{31\;g}}\\&=\mathrm{1.29\times10^{-3}\;moles}\end{aligned}[/tex]
The total mass is 77.6 mg. Then, the mass of selenium is (77.6-40)mg=37.6 mg=0.0376 g. Computing the moles of selenium, we get,
[tex]\begin{aligned}\text{moles of Se}&=\mathrm{0.0376\;g}\times\mathrm{\frac{1\;mole}{79\;g}}\\&=\mathrm{0.476\times10^{-3}\;moles}\end{aligned}[/tex]
Now, divide the mole value of smaller by the mole value of P and Se. We get,
[tex]\begin{aligned}\frac{1.29\times10^{-3}}{0.476\times10^{-3}}}&=2.71=3\\\frac{{0.476\times10^{-3}}}{{0.476\times10^{-3}}}&=1\end{aligned}[/tex]
Therefore, the required answer is P₃Se₁.
The complete question is -
A 40 mg sample of phosphorus reacts with selenium to form 77.6 mg of the compound. What is the empirical formula of phosphorus selenide?
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Which of the following occurs first in synaptic transmission once the action potential reaches the end bulbs
Once an action potential reaches the end bulbs of a neuron, the first event in synaptic transmission is the release of neurotransmitters from the presynaptic neuron.
When an action potential reaches the end bulbs, it causes the opening of voltage-gated calcium channels in the presynaptic membrane. This influx of calcium ions into the presynaptic neuron triggers the release of neurotransmitters stored in vesicles at the synapse.
The neurotransmitters then diffuse across the synaptic cleft, the small space between the presynaptic and postsynaptic neurons, and bind to receptors on the postsynaptic membrane. This binding causes a change in the electrical or chemical properties of the postsynaptic neuron, leading to the initiation or inhibition of an action potential in the postsynaptic neuron.
It's worth noting that, this process is called synaptic transmission, it's the process by which an action potential in one neuron causes an electrical or chemical signal in another neuron, muscle cell or gland cell.
