1 to 2 feet (cubed) per person per year can be accumulated in lagoon systems.
What is meant by lagoon systems?Lagoons are basin-like to collect, retain, and treat wastewater for a predefined amount of time. They are pond-like bodies of water.
Components of lagoon systems:A septic tank plus a small earthen pond with a constant 3-foot depth make up a lagoon system. A septic tank is a sizable, underground, watertight, corrosion-resistant container that collects untreated sewage from a home's plumbing drains.Dumping by septage hauling trucks is a common cause of slug loading into lagoons.Depth of sludge on the bottom of a lagoon that indicates that the lagoon should be cleaned is 1 foot.carbon dioxide gas is used and produced by algae, causing variations in a lagoon's pH.Biological growth provides enough oxygen to sufficiently aerate most lagoons for treatment processes to work.pH above 8.5 keeps lagoons from generating odors.To learn more about lagoon systems visit:
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Arrange the procedural steps, from start to finish, that are required for the correct use of an automatic micropipettor.
Steps that are required for the correct use of an automatic micropipettor -
1. ensure that the pipette is adjusted to discharge the proper V
2. depress the knob until you reach the point of first resistance.
3. dip the tip of the pipette into the solution
4. gradually depress the plunger to suck solution into the tip
5. Remove the tip from the solution and put it on the inside wall of the container into which the solution to be dispersed.
6. again depress the knob to the first point of resistance
7. After a brief pause, depress the knob as far as it will go.
What is the benefit of an automated pipette?Pipettes that are automated can eliminate the need for manual work and provide a variety of benefits. The most obvious benefit is increased throughput, since automation frees up time and effort for other activities. Another advantage is increased repeatability.
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What mass of hydrogen is produced when 192 g of magnesium is reacted with hydrochloric acid?
Answer:
Mg+2HCL-Magnesium Chloride +Hygrogen
[tex] > [/tex]
Explanation:
N.O of moles=Mass\Molar Mass
192÷24=8
1:1
8×2=16
[tex]\huge\underline{\underline{\boxed{\mathbb {SOLUTION:}}}}[/tex]
[tex]\longrightarrow \sf{Mg+2HCI \Longrightarrow MgCl_2+H_2}[/tex]
[tex]\longrightarrow \sf{molMg=129gMg \times \dfrac{1molMg}{24.305gMg=} }[/tex]
[tex]\small \sf{\longrightarrow molH_2=7.90molMg \times \dfrac{1molH_2}{1molMg}= 7.90molH_2 }[/tex]
[tex]\small \sf{\longrightarrow massH_2=7.90H_2 \times \dfrac{2.016g}{1molH_2}= 7.90molH_2= 15.9 \: gH_2}[/tex]
[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]
[tex] \small\bm{ The \: mass \: of \:H_2 \: produce \: will \: be \: 15.9 }[/tex] [tex]\bm{grams.}[/tex]
Determine the molecular formula of a compound whose molecular mass is 60.00 g/mol and has an empirical formula of ch4n. ch4n c2h5n2 c2h8n2 c3h12n3
Molecular formula of a compound whose molecular mass is 60.00 g/mol and has an empirical formula of C₂H₈N₂.
We know the empirical formula and thus the molar mass of the empirical formula, we simply need to find out how many of these fit into the molar mass of the molecular formula.
In this problem, we have an empirical formula of CH₄N
so the molar mass is 12 + 4 + 14 = 30 g/mol.
Molecular formula mass/Empirical formula mass=60 g/mol/30 g/mol=2
The molecular formula is TWICE that of the empirical formula.
Molecular formula = 2XCH₄N = C₂H₈N₂
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Answer:
C2H8N2
Explanation:
edge 2023
A 0. 462 g sample of a monoprotic acid is dissolved in water and titrated with 0. 180 m koh. what is the molar mass of the acid if 28. 5 ml of the koh solution is required to neutralize the sample?
The molar mass of the acid if 28. 5 ml of the koh solution is required to neutralize the sample is 90.23g/mol.
For the calculation of molarity of solutionMolarity = (moles of solute/volume of solution) × 1000
Given,
Molarity of KOH solution = 0.180 M
Volume of solution = 28.5 mL
0.180 = (moles of KOH/ 28.5) × 1000
Moles = (0.18× 28.5)/1000
= 0.00513 mol
Chemical equation for the reactionHA + KOH ------- KA + H2O
1 moles of KOH reacts with 1 moles of HA.
So, 0.00513 moles of KOH react with 0.00513 moles of HA.
To calculate the molar mass for given number of molesNumber of moles= given mass/ Molar mass
Given,
Mass of HA = 0.462 g
Moles of HA = 0.00512 mol
0.00512 = 0.462/ Molar mass
Molar mass = 90.23 g/ mol.
Thus the molar mass of HA required to neutralize the 28.5 mL of KOH is 90.23g/mol.
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A combustion reaction will always be associated with a change in entropy that will be:_________
A combustion reaction will always be associated with a change in entropy that will be positive.
What is entropy ?The entropy of a system is the measurement of the disorder of the system which happens in the thermodynamic reaction.
During association the value of entropy will be positive and during dissociation the value will be negative.
During association the number of molecule increases due to which the entropy of the combustion increases and the value will be positive .
Therefore , combustion reaction will always be associated with a change in entropy that will be positive.
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An increase in blood CO2 or a decrease in blood ph will lead to which change in respiration?
At 2000 K the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively. Calculate the value of the equilibrium constant Kp at 2000 K.
At 2000 K, if the partial pressures of an equilibrium mixture of H2S, H2, and S are 0.0151 , 0.0472 , and 0.0352 atm, respectively, then the value of the equilibrium constant Kp at 2000 K is 9.089.
What is partial pressure?The pressure that is exerted by one among the mixture of gases if it occupies the same volume on its own is known as Partial pressure.
As we know that,
Kp is the constant of a certain reaction at equilibrium.
For the given chemical reaction:
H2 +S -------H2S
The expression of Kp for above equation follows:
Kp = p(H2S) /{p(H2) ×p(S)}
where,
p(H2S) is the partial pressure of H2S = 0.0151atm
p(H2) is the partial pressure of H2 = 0.0472atm
p(S) is the partial pressure of S = 0.0352 atm
Kp can be calculated as:Kp = 0.0151/(0.0472 × 0.0352)
Kp = 0.0151/0.00166144
Kp = 9.089
Thus, we find that the value of equilibrium constant Kp at 2000K is 9.089.
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Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in and the atom emits a photon of light with a wavelength of 486 nm.
The end (final) value of n in a hydrogen atom transition is 2.
Using the Rydberg formula ;
1/lamda = R ( 1/[tex]n_{f} ^{2}[/tex] - 1/[tex]n_{i} ^{2}[/tex] )
where , lamda = wavelength = 486 nm = 486 ×[tex]10^{-9} m[/tex]
[tex]n_{f}[/tex] in a hydrogen atom transition = final state = ?
[tex]n_{i}[/tex] in a hydrogen atom transition = initial state = 4
R = Rydberg constant = 1.097 ×[tex]10^{7} m^{-1}[/tex]
1/ 486 ×[tex]10^{-9} m[/tex] = 1.097 ×[tex]10^{7} m^{-1}[/tex] ( 1/[tex]n_{f} ^{2}[/tex] - 1/[tex]4^{2}[/tex] )
[tex]n_{f}[/tex] = 2
Missing parts :
Determine the end (final) value of n in a hydrogen atom transition, if the electron starts in n=4 and the atom emits a photon of light with a wavelength of 486 nm.
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A student compares the boiling point of substances having different intermolecular forces. which dependent variable did the student most likely use? compounds made of either ions, atoms, or molecules type of source used to heat up the substances type of container used for the substances boiling points of various substances
A student compares the boiling point of substances having different intermolecular forces. Boiling points of various substances is the dependent variable that student most likely use.
Does the nature of intermolecular forces present in different substance affect their boiling points?The boiling point of a substance is proportional to the strength of its intermolecular forces, the higher the boiling point, the stronger the intermolecular forces. We can compare the strengths of intermolecular forces by comparing the boiling points of different substances.
What properties are affected by intermolecular forces?Intermolecular forces are measured by boiling points.
Intermolecular forces increase as bond polarization increases.
Ionic > hydrogen bonding > dipole dipole > dispersion is the order of the strength of intermolecular forces (and thus their impact on boiling points).
How can you determine strong and weak intermolecular forces?Substances with strong intermolecular forces are very attracted to one another and are held together tightly. These substances require a great deal of energy to separate, whereas substances with weak intermolecular forces are held together very loosely and have weak interactions.
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What molarity should the stock solution be if you want to dilute 25. 0 ml to 2. 00 l and have the final concentration be 0. 103 m?
The stock solution should have a molarity of 8.24M.
Proportional sets. C₁V₁=C₂V₂ is used to calculate an unknown quantity where two solutions/mixtures are proportional.
It follows that the initial concentration times the initial volume will equal the final concentration times the final volume because the sum does not vary.
Using the formula as follows;
C₁V₁ = C₂V₂
Where;
C₁ = initial concentration of the stock solution
C₂ = final concentration of the stock solution
V₁ = initial volume of the stock solution
V₂ = final volume of the stock solution
According to the information given in this question,
V₁ = 25mL = 25/1000 = 0.025L
V₂ = 2L
C₁ =?
C₂ = 0.103M
Using the formula; C₁V₁ = C₂V₂
C₁ = C₂V₂/V₁
C₁ = (0.103 × 2) / 0.025
C₁ = 0.206 / 0.025
C₁ = 8.24 M
Therefore, the stock solution should have a molarity of 8.24M.
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Choosing ecosystem to draw in your drawing include the following
10 different biotic factors five
5 different abiotic factors
identify all 15 factors and label whether they are biotic or abiotic factors
your pictures should make sense there shouldn't be a polar bear in a sand desert
color your picture
be creative
Abiotic factors are the physical and chemical compounds of an environment, being able to influence the living beings present in the ecosystem so that plants and animals have to adapt to survive and develop.
What are biotic and abiotic factors?The biotic components are all the living things that live in a certain place, while the abiotic components are all the physical, chemical and geological factors of the environment such as
waterlightsoilhumiditytemperaturenutrientsWith this information, we can conclude that An abiotic factor is a non-living part of an ecosystem that shapes its environment.
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What is the correct reading of the temperature in the pictured thermometer? make sure to report your reading with the appropriate significant figures.
36°C
The correct reading of the temperature in the pictured thermometer is 36°C.
What is a thermometer?Thermometer is a device that measures temperature. Specifically speaking one that has a sensor placed inside a metal probe that measures temperature changes by changing electrical resistance.How does a thermometer work?In a mercury thermometer, a glass tube is filled with mercury, and the tube is labelled with a standard temperature scale. The mercury expands and contracts as the temperature changes, allowing the temperature to be read from the scale. The temperatures of the body, liquid, and vapor can all be determined with mercury thermometers.What are thermometers and how do they differ?Thermometer Types:laboratory thermometer electronic thermometer IR thermometer for the ears. mercury-filled thermometerExactly who made the thermometer?The thermometer as a temperature measurement tool is usually acknowledged to have been created by the Italian Santorio Santorio (1561-1636), who is credited with adding a scale to an air thermoscope at least as early as 1612.To learn more about thermometer visit:
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Which component of the electron-transport chain is required to combine the pair of electrons with molecular oxygen?
n oxidative phosphorylation, ATP production is coupled to the events in the electron-transport chain
Why does the C-14/C-12 ratio change with time in fossils?
A. C-14 is no longer being produced in the atmosphere.
B. The C-14 half-life changes over time in a known way.
C. C-14 decays but C-12 stays the same after death.
D. C-12 also begins to decay over long periods of time.
Answer:
C. C-14 decays but C-12 stays the same after death.
Explanation:
C-12 is stable and won't change. C-14 is slightly radioactive. It decays over time to C12. A living plant or animal has a fairly constant C14/C12 ratio during it's lifetime. Sources of food have a fairly consistent C-14/C-12 ratio. Once it dies, the C-14 is no longer replenished, so the ratio of C-14 to C-12 drops over time, giving paleontologists the ability to carbon-date the sample. The less C-14, the older the sample.
How many grams of CO would be required to generate 635 g CO2
The amount of CO that would be required to generate 635 g of CO2 will be 404.14 g
Stoichiometric problemFirst, let us get the equation of the reaction:
[tex]2CO + O_2 -- > 2CO_2[/tex]
From the equation, we can see that the mole ratio of CO to that of CO2 is 1:1.
635 g of CO2 is to be generated.
Mole of 635 g CO2 = mass/molar mass = 635/44.01 = 14.43 moles
Thus, the equivalent mole of CO required will also be 14.43 moles.
Mass of 14.43 moles CO = moles x molar mass = 14.43 x 28.01 = 404.14 g
Hence, 404.14 g of CO will be required to produce 635 g of CO2
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As a gaseous element condenses, the atoms become ________ and they have ________ attraction for one another.
As a gaseous element condenses, the atoms become closer together and they have more attraction for one another.
What is Condensation?The transformation of water vapour into liquid is known as condensation. The process is the opposite of evaporation, in which liquid water turns into a vapour. Either the air is chilled to its dew point or it gets too saturated with water vapour to retain any more water, causing condensation to occur.
Attraction - Gas Particles move continuously in a straight path in a gas. They are significantly further apart and move independently of one another because the kinetic energy of the molecule is larger than the attraction force between them. There are often almost no attractive forces between particles.
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The combustion of 1 mole of co according to the reaction co(g) ½o 2 (g) co 2 (g) 67.6 kcal gives off how much heat?
Heat change at constant volume for the combustion of carbon monoxide = -67.71 Kcal
CO(g) + 1/2O2(g) ⟶ CO2(g)
From the above reaction,
∆ng = nP - nR = 1 - ( 1/2 + 1 )
∆ng = - 1/2
Temperature (T) = 17°C (17+ 273) K = 290K (Given)
Now from first law of thermodynamics,
∆H = ∆E + ∆ng RT
ΔΗ = -67.71 + (-1/2) x 2 x 10^-3 x 290
∆H = -67.71 - 0.29 = -68 Kcal
Hence the heat of reaction at constant pressure will be -68 Kcal
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Consider the tetrahedral intermediate and the two leaving groups, methoxide and amide anion. does this reaction favor reactants or products?
The reaction of tetrahedral intermediate and the two leaving groups, methoxide and amide anion favour product.
What is leaving group?A leaving group is a group of atoms or an atom which is able to break away from a molecule as a stable species or with a lone pair, breaking the bond between the molecule and itself.
What is intermediate?A stage is come before forming product. This stage is termed as transition stage and the reactant at this stage is termed as intermediate.
According to Le Châtelier's Principle, a reactions always tend towards the equilibrium, the reaction produces more products from the excess reactant, that's why it causing the system to shift to the left which allows the system to reach equilibrium.
Due to this reason, this reaction shift towards product.
Thus, we concluded that the reaction of tetrahedral intermediate and the two leaving groups, methoxide and amide anion favour product.
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An unknown gas effuses 2. 165 times faster than xe. what is the molar mass of the gas? show the set up and answer with unit
27.94 g/mole is the molar mass of the unknown gas.
Use Graham's Law, which indicates that the square root of a gas's molar mass determines its rate of effusion.
The following equation compares two distinct gases, (a) and (b), and expresses this:
sqrt(M(b)/M) = R(a)/R(b) (a)
R is the effusion rate.
square root = sqrt
the molar mass, M
In response to your query, if gas (a) is the unknown gas and Xe(M = 131 g/mol) is the second gas, we have:
sqrt(M(Xe)/M(a) = 2.165, where R(a)/R(Xe)
Square both sides, and you get:
(2.165)² = 131 g/mol/ M (a)
M(a)(2.165)² = 131
M(a) is equal to 131/(2.165)² = 27.94 g/mol.
Having a molar mass of 27.94 g/mol, the unknown gas.
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A liquid takes 10.14 x 10^6 j of energy to boil 28.47 kg at 298 k. using the latent heats of vaporization of 5 liquids below, determine what the substance is. acetone: 538,900 j kg-1 ammonia: 1,371,000 j kg-1 propane: 356,000 j kg-1 methane: 480,600 j kg-1 ethanol: 841,000 j kg-1
Correct option is C
Latent heat of vaporization is the amount of heat required to bring about the phase transition from liquid to gaseous state, at its boiling point.
The substance is Propane :
10140000 J of heat is used to boil 28.47 kg at 298 K. Here, the important thing is, the liquid is changing to vapor and the temperature is not changing means it's a phase change. So, the formula used for this is:
q=m× Δ[tex]H_{vap}[/tex]
where, q is the heat energy, m is mass and Δ[tex]H_{vapour}[/tex] is the enthalpy of vaporization.
Let's rearrange the formula for as:
Given mass of the liquid = 28.47kg
Heat required to boil the liquid = 10.14 ×[tex]10^{2} J[/tex]
Let's plug in the values: [tex]\frac{10.14*10^{2}J }{28.47Kg} =356164\frac{J}{Kg}[/tex]
Rounding off 356164 will turn into 356000 J[tex]Kg^{-1}[/tex]
Hence, the right choice is C. propane 356000 j[tex]Kg^{-1}[/tex]
What is latent heat ?
Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.
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What can the presence of suffixes such as -ite,-ate,or -de in a chemical name indicate?
Answer: Most polyatomic ions are -ate, related ions that have 1 fewer oxygen atom are -ite (must have at least 1 oxygen tho) and nonmetals are ide.
Explanation:
A 1. 477 g sample of khp required 30. 27 ml of naoh solution to reach endpoint. Calculate the molarity of the NaOH.
The molarity of the NaOH is 0.238 M when 1. 477 g sample of KHP required 30. 27 ml of NaOH solution to reach endpoint.
Calculation ,
Mass of KHP = 1. 477 g
Number of moles of KHP = given mass / molar mass of KHP
Number of moles of KHP = 1. 477 g × 1 mol / 204.23 g KHP = 0.007 mol
Since , one mole KHP requires one mole of NaOH .
Number of moles of NaOH required by 0.007 mol of KHP = 0.007 mol
Molarity of NaOH = number of moles / volume in lit = 0.007mol/0.03027ml = 0.238 M
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Through which conversion is energy released? adp to atp atp to adp nadp to nadph co2 and h2o to c6h12o6 and o2
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Answer:
B) ATP to ADP
Explanation:
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It is necessary to add zncl 2 to promote the reaction of hcl with some alcohols while these same alcohols react with hbr quite readily. explain.
It is necessary to add zncl 2 to promote the reaction of hcl with some alcohols as this reaction is reversible to make it irreversible ZnCl2 is used.
ZnCl2 is used as Lewis acid catalyst. Since Cl- is weaker nucleophile than Br. The lewis acid ZnCl2 coordinate with oxygen of alcohol and proceed the reaction in forward direction.
HCl is less reactive with alcohols whereas the bond between H and Cl is stronger than HBr and HI.
Hence its reaction with alcohols need a catalyst ZnCl2, which helps in the breaking of bond between H and Cl.
Therefore, Luca's reagent is used in the reaction of HCl and alcohol.
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What will be the ph of a buffer solution containing an acid of pka7. 5, with an acid concentration exactly one fourth of that of the conjugate base?
The pH of a buffer solution containing acid of pKa 7.5 will be 8.1.
The pH of a solution indicates its acidity or basicity. A pH below 7 is acidic, while pH above 7 is basic. 7 is considered as the neutral value.
A buffer is a solution that has the ability to resist the change in pH when an acid or a base is added to it. The natural example of buffer is blood.
According to the question, pKa of acid = 7.5
If concentration of base is x then, concentration of acid will be x/4.
According to the Henderson–Hasselbalch equation,
pH = pKa + log [A⁻] / [HA]
pH = 7.5 + log [[tex]\frac{x}{x/4}[/tex]]
pH = 7.5 + log 4 ⇒ 7.5 + 0.602
pH = 8.1
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A. what are two common by-products of sugar fermentation? how is phenol-red broth designed to measure both?
The two common by-products of sugar fermentation are acid ( like lactic acid) or hydrogen and gas(carbon dioxide). During fermentation , any gas that is produced by the microbes get trapped in the inverted Durham tube and bubbles will appear.
The acid production is indicated by the color change of medium from normal red to yellow and remains red for no acid production.
The respiration process can be aerobic or anaerobic. In both process glycolysis, which occur in absence of oxygen is common. In this process one molecule of glucose is converted into two molecules of pyruvic acid . Gycolysis occur in cell cytoplasm. In anaerobic respiration is a cytosolic process, which results in production of lactic acid ( lactic acid fermentation) or ethanol and carbon dioxide (alcoholic fermentation)
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Determine which choice is an example of an exothermic process. a. none of these b. freezing water c. melting ice d. baking bread
option (b) freezing water is the correct answer.
Freezing water is an example of an exothermic process.
What is an exothermic process?An exothermic reaction is one in which energy is given off as heat or light. In contrast to an endothermic process, which draws energy from its surroundings, an exothermic reaction transfers energy into the environment.Heat is released during an exothermic reaction, raising the temperature of the immediate environment. The environment is cooled through an endothermic process that absorbs heat.We can observe that melting of an ice is an example of endothermic process whereas, freezing of water is considered to be an example for exothermic process.
Water releases heat when it solidifies, warming the area around it. As a result, freezing is an exothermic process.
Some of the examples for exothermic process can be as follows:Making of an Ice Cube. Making an ice cube is a process of liquid changing its state to solidSnow Formation in CloudsBurning of a CandleRusting of Iron Burning of SugarFormation of Ion PairsIn the above given options,
In melting ice, it is an endothermic response because it releases heat, allowing a transition to take place. The procedure is endothermic since the ice cube requires heat to melt.In baking bread, the dough's ingredients, including the flour, yeast, and others, are heated. They absorb the heat, which triggers chemical processes.To learn more about exothermic process visit:
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Answer:
B.) Freezing water
Explanation:
I got it correct on founders edtell
What volume of hydrogen (in l) is produced from 3.143 mol of hydrochloric acid at stp
Volume of hydrogen (in l) is produced is 35.20 L
Given:
moles of hcl = 3.143 mol
To Find:
volume of hydrogen
Solution:
2HCl → H2 + Cl2
STP 2*22.4L 22.4L 22.4L
2 mol 1 mol 1 mol
73 gm 2gm 35.5gm
here we can see that 2 mol hcl is producing 22.4 litres of hydrogen
So, 3.143 mol hcl will produce hydrogen = 22.4/2*3.143 = 35.20 litres
Volume of hydrogen (in l) is produced is 35.20 L
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How many valence electrons are present in the lewis formula for the perchlorate ion, cl4-?
a. 30
b. 38
c. 34
d. 36
e. 32
The valence electrons are present in the lewis formula for the perchlorate ion will be 32.
The electrons in such an atom's outermost atomic shell known as the valence electrons may be those that orbit the nucleus. Core electrons are mostly in filled orbitals some of which are located closest to the nucleus.
The formula of perchlorate ion is [tex]ClO^{-} _{4}[/tex].
The valence electrons of Cl is 7 and the valence electrons of oxygen is 6 , one negative charge . By adding the total valence electron, it will be 32.
The valence electrons are present in the lewis formula for the perchlorate ion will be 32.
Hence, the correct answer will be option (e).
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Olive oil and butter both contain fats; however, olive oil is liquid at room temperature and butter is solid. Why?.
This is why even though Olive oil and butter both contain fats, olive oil is liquid at room temperature and butter is solid.
Since saturated fat makes up the majority of butter, it is solid at room temperature. Olive oil is an unsaturated fat since it is liquid at room temperature. Through hydrogenation processes, an unsaturated fat can be converted to a saturated fat.What are saturated fats?a form of fat believed to be less healthy in the diet than unsaturated fat because it contains a higher percentage of fatty acid molecules lacking double bonds.butter, ghee, suet, lard, coconut oil and palm oil, cakes, biscuits, fatty cuts of meat are some of the examples.What are unsaturated fats?a form of fat that is thought to be healthier in the diet than saturated fat because it contains a high percentage of fatty acid molecules with at least one double bond.Olive, peanut, and canola oils, Avocados, Nuts such as almonds, hazelnuts, and pecans, Seeds such as pumpkin and sesame seeds are some of the examples.To learn more about fats visit:
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