Answer:
gram (g), kilogram (kg) and tonne (t).
Explanation:
What is the primary difference between alcohol fermentation in yeast and lactic acid fermentation in muscle cells?.
The primary difference between alcohol fermentation in yeast and lactic acid fermentation in muscle cells is that alcohol fermentation in yeast produces ethanol and carbon dioxide, while lactic acid fermentation in muscle cells produces lactic acid.
Yeast cells produce ethanol and carbon dioxide through the process of alcoholic fermentation. This process begins when yeast cells consume glucose. The yeast cells convert the glucose into pyruvate, and then the pyruvate is converted into ethanol and carbon dioxide. Lactic acid fermentation takes place in muscle cells when they do not have enough oxygen to produce energy aerobically. In this process, the muscle cells convert pyruvate into lactic acid. Lactic acid is then used by the cells to produce energy.
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1. A mixture consists of liquid A (boiling point = 45°C) and liquid B (boiling point = 86°C).
Which separation technique would you use to separate the mixture of the two liquids?
Explain how this technique would be carried out to separate the components of this mixture.
Distillation would be used to separate the mixture of two liquids having boiling points of 45°C and 86°C.
What is distillation?Separating the component substances from a liquid mixture by evaporation and condensation is called as distillation. It is one of the most common techniques for the purification and identification of organic liquids.
Distillation is used for separating a mixture of miscible liquids into its components and when the difference in the boiling points of the liquid is more than 20-25 degree Celsius. It is a physical process as it involves phase change from liquid to gas.
Following are the steps involved in distillation:
1. Converting desired liquid from a mixture into vapor.
2. Condensing the liquid that is purified.
3. Finally, collecting the condensed liquid
There are four types of distillation namely, Fractional, simple, Vacuum and Steam Distillation.
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How are all of Earth's water reservoirs connected to the ocean?
All of th Earth's water reservoirs connected to the ocean by the processes of evaporation and precipitation.
Evaporation and precipitation processes link the ocean to all of the earth's water reservoirs, making it a crucial component of the water cycle.
Due to the fact that all significant watersheds on Earth drain to the ocean, the ocean is linked to significant lakes, watersheds, and streams. From watersheds to estuaries and the ocean, rivers and streams carry nutrients, salts, sediments, and pollutants.
Evaporation refers to the process in which liquid is converted into gaseous state or vapours. Precipitation is the process in which gaseous vapours are turned into liquid state and are shed down on the Earth.
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Make and use a table: to compare mitosis and meiosis in humans. Vertical headings should include: What Type of Cell (Body or Sex), Beginning Cell (Haploid or Diploid), Number of Cells Produced, End-Product Cell (Haploid or Diploid), and Number of Chromosomes in New Cells.
Replicated chromosomes split into two new nuclei during the mitotic cell cycle phase, which is referred to in cell biology. With a fixed number of chromosomes, genetically identical cells are produced during the cell division process known as mitosis. As a result, mitosis is also known as equational division.
Meiosis is a unique form of germ cell division that creates gametes, such as sperm or egg cells, in sexually reproducing animals. In the end, four cells with just one copy of each chromosome are produced after two rounds of division.
Meiosis creates cells that are genetically distinct from the parent and have half as much DNA as mitosis, which divides a single "parent" cell into two genetically identical "daughter" cells. Most cells in the body go through mitosis on a regular basis, however some do so more frequently than others.
Meiosis results in genetic variety because of crossing over and independent assortment while mitosis produces identical cells for the mother cell and each daughter cell. Meiosis produces cells with half as many chromosomes as the mother cell, while mitosis produces nuclei with the same amount as the mother cell.
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is it possible for rocks to keep growing and spread if not broken down
Answer:
The rock helps smother unwanted plant growth, but some stubborn weeds find a way to thrive. Weed prevention starts before you put the rocks down and continues with regular maintenance to stop a large-scale weed invasion.
Explanation:
HOPE IT HELPS YOU
HURRY PLEASE DO IN HOUR? Determine the mass in grams of 6.63 × 102' atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)
The mass of the 6.63 × 10²¹ atoms of Arsenic is equal to 0.825 grams.
What is Avogadro's number?The Avogadro constant can be described as the proportionality factor which is the number of constituent components such as atoms, molecules, or ions in one mole of a substance.
Avogadro's number has a numeric value of 6.022 × 10²³ reciprocal moles.
Given, the mass of one mole of the Arsenic = 74.92 g
The number of atoms of Arsenic is given = 6.63 × 10²¹
One mole of Arsenic has atoms = 6.022 × 10²³
The 6.022 × 10²³ atoms of Arsenic have mass = 74.92 g
Then 6.63 × 10²¹ atoms of the Arsenic will have mass :
= 6.63 × 10²¹ × 74.92/6.022 × 10²³
= 0.825 g
Therefore, the mass of the 6.63 × 10²¹ atoms of Arsenic is 0.825 grams.
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The light-gathering ability of a reflecting telescope depends on its _____
a. length
b. mirrors
c. lenses
d. materials
Answer:Mirrors
Explanation:
describe a shell model of a lithium atom (li), which has 3 protons. predict whether the majority of lithium atoms on earth are uncharged, positively charged, or negatively charged.
Majority of lithium atoms on earth are positively charged.
What is the charge of lithium?3 protons and 3 electrons respectively, make up a lithium atom. It might become an ion if one of its electrons is lost. It now has a net positive charge since there are more positive protons than negative electrons. It is a positive ion as a result.
What is lithium atom?An atom of the chemical element lithium is known as a lithium atom. Three electrons connected by the electromagnetic force to a nucleus with three protons and either three or four neutrons, depending on the isotope, are what make up stable lithium. The nucleus is held together by strong force.
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Each item describes an example of thermal energy transfer. Identify each item according to the method of thermal energy transfer described in the scenario. There are two examples of heat transfer for each type below.
1. Someone places a hand on metal table and the hand feels cooler (conduction, convection, or radiation?)
2. Storm clouds from when warm air moves upwards in the atmosphere (conduction, convection, or radiation?)
3. A person turns on a lamp and feels it warmth on their hands (conduction, convection, or radiation?)
4. The heat from a space heater rises to the top of a room and is replaced by cooler air (conduction, convection, or radiation?)
5. Energy from the sun travels to the Surface of the Earth (conduction, convection, or radiation?)
6. Heat from a stove warms a pot of soup (conduction, convection, or radiation?)
Conduction is the process through which heat is transferred from an object's hotter end to its cooler end. A hotter body naturally transfers heat to a cooler body.
Convection is single- or multiphase fluid flow that develops on its own as a result of the interaction between a fluid's body forces—most frequently gravity and density—and material property heterogeneity.
Thermal radiation is electromagnetic energy released when matter particles move thermally. When heat from the movement of charges in the material is converted to electromagnetic radiation, thermal radiation is produced. Thermal radiation is emitted by all matter that has a temperature higher than absolute zero.
Someone places a hand on metal table and the hand feels cooler - conductionStorm clouds from when warm air moves upwards in the atmosphere -convectionA person turns on a lamp and feels it warmth on their hands -conductionThe heat from a space heater rises to the top of a room and is replaced by cooler air - convectionEnergy from the sun travels to the Surface of the Earth - radiationHeat from a stove warms a pot of soup - conductionTo know more about thermal energy transfer, click on the link below:
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Balance the chemical reaction
using an atom inventory.
What is the coefficient for
aluminum?
[?]AI + [ ?]Cl₂ →→ [?]AICI3
Answer:
reactants. product
Al(1) Al(1)
Cl(2) Cl(3)
2Al+3Cl2 ---> 2AlCl3
reactants. product
Al(2) Al(2)
Cl(6) Cl(6)
In a balanced chemical equation, the mass and the charge are both equal. Here the balanced equation is 2Al+3Cl₂ → 2AlCl₃. Here the number of Al and Cl on both sides of the equation are equal.
A balanced chemical equation, in which the masses of the reactants and products are equal, contains the same amount of atoms of each element on both sides of the equation. In other words, both sides of the reaction have an equal balance of mass and charge.
Making both sides of the reaction, the reactants and the products, equal in the number of atoms per element is the ultimate goal of balancing chemical equations.
In order to balance the equation, Al+Cl₂ → AlCl₃, multiply 'Al' and 'AlCl₃' by 2 and Cl₂ by 3. So that the number of 'Al' atoms becomes 2 and 'Cl' atoms becomes 6.
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92 POINTS!!!!
What type of motion have you experienced today? Describe your motion in terms of speed, velocity, an
acceleration. What might a graph of your motion look like?
The motion of that I had today is a constant motion in a bus that does not change speed.
What is motion?The term motion has to do with the change in the position of a body with time. Now we know that when there is motion, the motion could occur in many different ways.
Today, I got on a bus on my way to school. This bus was moving at a constant speed. The speed of the bus never changed. We can say that the bus had a zero acceleration since the speed of the bus did not change through out the journey.
As such, the graph of the motion would have a flat horizontal line across the x axis.
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How would this model be like after being separated chemically? Please help!!
A separation process is a method that divides a mixture or solution of chemical compounds into two or more different product mixtures. It is a scientific approach of separating two or more substances in order to achieve purity.
How are chemical brews divided?
Mixtures can be separated using a variety of techniques. Chromatography on a solid medium necessitates solvent separation. Distillation involves the use of several boiling points. Evaporation removes a liquid from a solution, leaving a solid behind.
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a titration experiment required 44.27 ml of naoh, which had a concentration of 0.120 m, to reach the endpoint when titrating 5.00 ml of an hcl sample with an unknown concentration. what is the concentration of the hcl solution in molarity? hcl(aq) naoh→nacl(aq) h2o(l)
The concentration of HCl is found to be 1.062M from the titration reaction.
Titration is a standard quantitative chemical analysis laboratory method for determining the concentration of a specified analyte. The titrant or titrator is a reagent that is produced as a standard solution of known concentration and volume. Titration is the constant addition of a known concentration solution (referred to as a titrant) to a known volume of a solution an unknown concentration until the reaction approaches equilibrium, which is indicated by a change in color.
Given:
V1 = 44.27mL
C1 = 0.120M
V2 = 5.00mL
To find:
C2 = ?
Formula:
V1C1 = V2C2
Calculations:
C2 = V1C1 / V2
C2 = 44.27 x 0.120 / 5
C2 = 5.3124 / 5
C2 = 1.062M
Result:
The concentration of HCl is found to be 1.062M
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calculate the volume of 0.2m naoh required to bring the ph of 20 ml of 5% acetic acid solution to 4.74, which is the pka of acetic acid.
Volume required is 41.625 ml of 0.20M NaOH must be added to the 20 ml of 5%. acetic acid solution to bring the pH to 4.74.
Solution -
Step 1: To calculate molarity of acetic acid in100 mL of solution
Molar mass of acetic acid = 60.0591 mol
No. of moles of acetic acid = mass of acetic acid ÷Molar mass of acetic acid
=5g÷60.05g/mol
moles of acetic acid 0.08326 mol
Molarity of acetic acid =moles of acetic acid/ Vol of sol" (in L)
=0.08326 mol/L÷0.1L
=0.8326mol/L
Molarity of 20 mL of 5% acetic acid solution = (20 mL) x 0.8326 mol /L
= 0.01665 mol/L
Step 2 :To calculate volume of 0.20 M NaOH required.
Let 'v' liters of 0.20 M NaOH was added to the acetic acid solution.
New Molarity of NaOH, x = (V x 0·20) M -equation (1)
Given: pH=4.74 ,pka=4.74
Henderson-Hasselbalch equation is:
[tex]pH = pK_a + log10([A^-] / [HA])[/tex]
[A⁻] = conjugate base
[HA] = acid
Acetic acid + NaOH → Sodium acetate + H2O
Initial 0.01665 M xM 0 M
change -x -x +x
Final 0.01665-x 0 xM
pH=pK a +log [Sodium acetate] [acetic acid]
4 * 74 = 4 * 74 + log(x/(0.01665 - x))
0 = log(x/(0.01665 - x))
Taking antilog both
[antilog (0) = 1]
1 = x / 0.016C5-x
0.01665 - x = x
x = 0.008325 M
New So, Molarity of NaOH = 0.008325 M
From equation (1).
New Molarity of NaOH = V ×0.20M
=0.008325 V × 0.20
V= 0.041625 L
V= 41.625 mL
Thus the volume will be V= 41.625 mL
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Hurry pleaseee DUE IN HOUR!!! Calculate the number of moles of He atoms present in 5.39 g of He.
WORTH 100 POINTS !!!
What does it mean when a reaction reaches equilibrium?
Explanation:
A reaction at equilibrium essentially means that the number of reactants and products is constant (but not necessarily equal) and continue to be constant until a change is imposed on the system.
HURRY PLEASE DUE IN HOUR? Determine the mass, in grams, of 0.425 moles of Co (1 mol of Co has a mass of 58.93 g).
Answer:26.2 grams
Explanation:We have 58.93 grams per mole cover so from here we'll be able to cancel moles of coat, and the remaining unit in the numerator will be gram which is our desired unit and then multiplying these 2 numbers 0.445 multiplied by 58.93. We should get 26.2 grams.
Which list consists of elements that have the most similar chemical properties?
a) Cu, Zn, Fe
b) K, Ca, Br
c) Mg, Al, Si
d) Cs, Na, K
Answer:
D. Cs, Na, K
Explanation:
Elements in the same column of the Periodic Table have similar chemical properties.
Answer:
d) Cs, Na, K
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. Cs, Na, and K are all in the same vertical column (which is called Group IA or the alkali metals).
PLEASE HELP, AWARDING BRAINLIEST!
The wavelength for transition in hydrogen atom is 397 nm.
1/wavelength = RH[(1/n12 )-(1/n22)]
Here RH= Rydberg constant = 109,677 cm-1
n1= 2
n2= 7
Substituting these values in the Rydberg formula we get
1/wavelength = 109,677cm-1[(1/2^2)-(1/7^2)]
1/wavelength = 109,677cm-1[(1/4)-(1/49)]
1/wavelength= 109,677cm-1[(49-4)/(49*4)]
Wavelength=( 49*4)/(45*109677) cm
Wavelength = 3.97*10^-5 cm
Wavelength= 397*10^-9 m
Wavelength= 397 nm.
Solve for the electron energy in the n = 7 plane of the hydrogen atom. So the soul you have is E equal to 13.6 divided by N square hoops. Here's an E.V that ends with a 7. All lines with a final energy level of n = 2 form a Balmer series. Going from n=5 to n=2 gives the third row of the Balmer series.
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Examine the electron configurations of oxygen, phosphorus and gallium. According to valence bond theory, how many bonds could each of these atoms form?.
Oxygen forms two bonds and the configuration is 1s₂ 2s₂ 2p₄, Phosphorus forms three bonds and the configuration is [Ne]3s₂ 3p₃, and Galium forms four bonds and the configuration is [Ar] 3d₁₀ 4s₂ 4p₁
What is valence bond theory?Chemical bonding is described by this idea. According to VBT, an atomic bond between two atoms is created when incompletely filled atomic orbitals overlap.Upon sharing the unpaired electrons, a hybrid orbital is created.Valence bond theory states that the metal atom or ion can employ its (n-1)d, ns, np, and nd orbitals for hybridization under the effect of ligands to produce a set of equivalent orbitals with specific geometry, such as octahedral, tetrahedral, square planar, etc.Bonding is explained in terms of hybridised orbitals of the electron in the valence bond (VB) theory, which was developed in major part by the American scientists Linus Pauling and John C. Slater.The Lewis notion of the electron-pair bond serves as the cornerstone of VB theory.Therefore,
Oxygen forms two bonds and the configuration is 1s₂ 2s₂ 2p₄
Phosphorus forms three bonds and the configuration is [Ne]3s₂ 3p₃
Galium forms four bonds and the configuration is [Ar] 3d₁₀ 4s₂ 4p₁
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You have a solution that contains 100 ml of 1. 5 m potassium carbonate and another 100 ml solution that contains 1. 0 m fecl2 and 2. 0 m nabr. When you mix the two solutions together to form a precipitate. What is the precipitate and how much is formed assuming the insoluble product precipitates completely?.
The precipitate is iron(II) carbonate based on the solubility of all possible cation and anion combinations and based on its molar mass, 11.6g of it will precipitate.
All the potassium salts and sodium salts except sodium bicarbonate are soluble in water, therefore the precipitate is the iron(II) salt. Iron(II) bromide is soluble in water, on the other hand, iron(II) carbonate is not water-soluble. Therefore iron(II) carbonate will precipitate.
According to the given data, we have;
0.100 L × 1.5 M = 0.15 moles of carbonate ions
0.100 L × 10. M = 0.1 moles of iron(II) ions
As they react in a 1:1 ratio, there is an excess of the carbonate ions and 0.1 moles of Iron(II) will precipitate.
Now by using the molar mass, the mass of the precipitate can be calculated as follows;
M = (56 + 12 + 3 × 16) g/mol
M = 116 g/mol
n = m ÷ M
m = M × n
m = 116 g/mol × 0.1 mole
m = 11.6 g
Therefore, iron(II) carbonate is the precipitate and the mass of this insoluble product is calculated to be 11.6 g.
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In a constant-pressure calorimeter of negligible heat capacity, 25 ml of 1. 00 m cacl2 is mixed with 25 ml of 2. 00 m kf, resulting in solid caf2 precipitating out of the solution. During this process, the temperature of the water rises from 25. 0°c to 26. 7°c. Assume the specific heat capacity of the solution is 4. 184 j/°c•g and the density of the solution is 1. 00 g/ml. Calculate the enthalpy of precipitation in kj per mole of caf2 precipitated.
Answer:
q = mC∆T
m = mass = 25 ml CaCl2 + 25 ml KF = 50 ml x 1.00 g/ml = 50 g
C = 4.184 J/g-deg
∆T = 1.7 deg
q = (50 g)(4.184 J/g-deg)(1.7 deg) = 355.6 J
Looking at the chemical reaction: CaCl2(aq) + 2KF(aq) ==> CaF2(s) + 2KCl(aq)
moles CaCl2 present = 0.025 L x 1.00 mol/L = 0.025 mol CaCl2
moles KF = 0.025 L x 2.00 mol/L = 0.05 mol KF
Neither reactant is limiting as they are both present in stoichiometric quantities. Thus, moles CaF2 formed will be 0.025 moles CaF2 formed.
∆Hppt = 355.6 J/0.025 moles = 14,224 J/mole = 14.2 kJ/mole
Find the odd one out: Give reasons why
1. Helium, argon, hydrogen. krypton
2. Lithium, nitrogen, oxygen, carbon
The odd one in the first group is hydrogen because all other elements are noble gases. The odd one in the second group is lithium since other elements are gases.
What is groups in periodic table?Groups are vertical columns containing elements of similar properties and same valency. The first two groups are metals and most of the p-block elements such as nitrogen, oxygen etc. are gases.
In the first series, except hydrogen all other elements are noble gases and belongs to the same group and in the second series except lithium all other element are gases.
Hence the odd one in first series is hydrogen and in the second series is lithium.
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a chemistry student uses 25.0 g of lithium sulfate to react with excess barium nitrate. the student isolates 43.5 grams of barium sulfate. what is the percent yield of this reaction? li2so4 ba(no3)2
The percent yield of the reaction is 81.95%.
The reaction of lithium sulfate with barium nitrate results to the precipitation of barium sulfate. The reaction is given below.
Li₂SO₄ + Ba(NO₃)₂ ⇒ BaSO₄ + 2 LiNO₃
Convert the mass of lithium sulfate used in the reaction to moles.
moles = mass/MM
moles = 25.0 g / 109.94 g/mol
moles = 0.2273967619
If 0.2273967619 moles lithium sulfate reacts with excess barium nitrate, then, theoretically, it will produce 0.2273967619 moles barium sulfate.
Convert the theoretical moles of barium sulfate to mass.
theoretical mass = MM(moles)
theoretical mass = 233.43 g/mol (0.2273967619 moles)
theoretical mass = 53.08122612 g
If the actual mass of the product is 43.5 g, solve the percent yield using the equation below.
percent yield = (actual/theoretical) x 100
percent yield = 43.5 g/53.08122612 g
percent yield = 81.95%
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-. Convert the 400nm wavelength of the violet light into meters.
By converting the 400 nm wavelength of violet light into meters we are get 4.0.10^-7.
What is wavelength?
wavelength can be defined as the distance between two successive crests or throughs of a wave. It is measured in the direction of the wave.
The wavelength of light defined as the distance between the two successive crests or throughs of the light wave.
The wavelength of light is the distance between corresponding point in two adjacent light cycles and the frequency.
Convert the unit for 400nm-
4.0.10^-7
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What is the ph of the solution obtained by mixing 35. 00 ml of 0. 250 m hcl and 35. 00 ml of 0. 125 m naoh?.
The PH of the solution obtained by mixing such concentration would be 3.56 that is by mixing 35 ml of 0.250 M hcl and 35 M of NaOH.
What is PH and how it comes out to be 3.56 by mixing such concentrations?PH is the hydrogen ion concentration depicting acidity, basicity and neutrality of a participating substance in the reaction.In here we are asked to calculate the PH of the solution by mixing 35 ml of 0.25 and 35 ml of 0.125 M NaOH.The equation for the given condition will be: HCL + NaOH = NaCl + H2O, in here will be complete neutralization in the solution.c= n/v , n= c x v , nHCl = 0.1 M X25 X 10^-3 L = 0.0025 moles of HCL and the total volume will be 35 ml + 35 ml = 70 mL and kb is 1.8 x 10^-5.Putting the formula POH = pKb + log (conjugate acid/weak base) we will get the value that is PH as 3.56.To know more about PH visit:
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1. How do people in America remember their heroes? (1 point)
Oby eating birthday cake
Oby doing special dances
Oby celebrating special holidays
Oby traveling to different countries
2. What did Martin Luther King. I want for all peopl
plant cells can use energy from the sun to make food. animal cells cannot. which organelle is responsible for this difference between plant and animal cells? HELP PLEASE
Answer:
Chlorophyll.
Explanation:
Chlorophyll is also why plants are green.
Pls mark brainliest with the crown
Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.
:)
in nuclear reactions, information about the nuclei that take place in the reaction and the nuclei that are produced can be written out in an equation form. when looking at equations like this, how can you identify a reaction as a fission reaction?
By looking at a nuclear reaction, a fission reaction can be easily identified as it shows the breakdown of a larger atom into two or more smaller nuclei.
What is nuclear reaction?it is the formation of one or more new nuclides by the collision of two nuclei or external subatomic particles. Nuclear reactions are of two types:
Nuclear fission reaction Nuclear fusion reactionIn nuclear fission reaction, a heavier nucleus splits into several smaller lighter nuclei fragments and two or more neutrons. These fragments, or fission products, are either equal to or half of the original mass of the atom The reaction proceeds with a very high emission of energy.
[tex]238_{92}[/tex]U → [tex]234_{90}[/tex]Th + [tex]4_{2}[/tex][tex]\alpha[/tex]
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I'm not sure how to answer this question - I understand that bleach + vinegar is a neutralisation reaction. The answer says that the equilibrium gets pushed to the left, producing more chlorine gas which is toxic, but I don't understand how the bleach + vinegar relates to the equilibrium reaction shown in the question.
It is dangerous to mix chlorine and vinegar together as cleaner because that would produce a large amount of chlorine gas by shifting the equilibrium to the left.
As per the Le Chatelier's principle, if the equilibrium of a reaction is disturbed by changing any property of the reaction, then the reaction will automatically shift in that direction which would compensate the effect of the change in property, in order to establish the equilibrium again.
In the reaction,
Cl₂(g) + 2NaOH(aq) ⇄ NaOCl(aq) + NaCl(aq) + H₂O(l)
Currently this reaction is in equilibrium, but if the concentration of any of the product is added in the system, the equilibrium will be disturbed, to established the equilibrium again, the the reaction will shift towards left and more and more amount of reactant will be formed, and more and more chlorine gas will be formed which is toxic.
Now to the doubt asked in the question,
If vinegar is added to the system, the amount of NaOH will be consumed which will decrease the concentration of NaOH and the concertation of water will increase because of acid water neutralization reaction.
The increased amount of water and the decreased amount of NaOH will heavily shift the equilibrium to the Left which is again producing chlorine gas which is not good.
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