Answer:
q = mC∆T
q = heat = ?
m = mass = 6.30 g
C = specific heat = 0.385 J/g/deg
∆T = change in temperature = 32-20 = 12º
q = ((6.30 g)(0.385 J/g/deg)(12 deg) = 29.1 J (to 3 significant figures)
Explanation:
Burning is a reaction in which oxides are formed by combining ______ and _________.
Answer:
Burning is a reaction in which oxides are formed by combining fuel(reductant) and oxidant.
Explanation: Ex charcoal and lighter fluid
Hope this helps
infrared radiation (1580 nm ) express your answer using three significant figures.
The infrared wavelengths of the electromagnetic spectrum encompasses infrared light with an emission wavelength of 1580 nm (nanometers).
The term near-infrared radiation is frequently used to describe it. The infrared light's greater wavelength range is indicated by its wavelength of 1580 nm.
Thermal imaging, remote sensing, and communication systems can all benefit from infrared radiation's capacity to interact with molecular vibrations and permeate certain materials.
Thus, we keep three significant figures by writing the wavelength as 1580 nm in order to accurately describe the value.
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Birds have a high internal body ?
Answer:
Yes.
Explanation:
Birds don't look much like humans on the outside. As you might expect, their insides are also different, even though their internal organs carry out the same basic functions human organs carry out.
Define the law of conservation of charge and provide an example.
Define opposite charges attract and like charges repel and provide an example.
Define Electricity along with an example.
Answer:
Conservation of Charge is the principle that the total electric charge in an isolated system never changes. The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved.
Considering the following precipitation reaction:
Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)
Which ion(s) would NOT be present in the net ionic equation?
A) Pb2+, NO3-
B) K+, NO3-
C) K+, Pb2+
D) K+, I-
The ion(s) would NOT be present in the net ionic equation will be[tex]Pb^{2+[/tex], [tex]NO^{3-}[/tex]
Option (a) is correct.
To determine which ions would not be present in the net ionic equation, we need to identify the spectator ions. Spectator ions are the ions that do not participate in the chemical reaction and remain unchanged throughout the reaction.
The net ionic equation represents the chemical equation after removing the spectator ions. We can determine the spectator ions by comparing the initial and final compounds and identifying which ions remain the same on both sides of the reaction.
Let's analyze the given reaction:
[tex]Pb(NO_3)_2(aq) + 2KI(aq)[/tex] → [tex]PbI_2(s) + 2KNO_3(aq)[/tex]
The balanced equation shows that [tex]Pb^{2+[/tex] and [tex]2NO_3^-[/tex] ions combine with 2K+ and 2I- ions to form [tex]PbI_2(s)[/tex] and [tex]2KNO_3(aq)[/tex]. In the reaction, the [tex]NO_3^-[/tex]ions are part of both the starting compound [tex](Pb(NO_3)_2)[/tex]and the product compound [tex](KNO_3)[/tex]. Therefore, the [tex]NO_3^-[/tex] ions are spectator ions and would not be present in the net ionic equation.
Now, let's consider the answer choices:
A) [tex]Pb^{2+}, NO_3[/tex]-: [tex]NO_3^-[/tex] ions are spectator ions, so this option is correct.
B) [tex]K+, NO_3[/tex]-:[tex]NO_3^-[/tex] ions are spectator ions, so this option is correct.
C) [tex]K^+, Pb^{2+}[/tex]: Both [tex]K^+[/tex] and [tex]Pb^{2+}[/tex] ions participate in the reaction, so this option is incorrect.
D) [tex]K^+, I^-[/tex]: Both [tex]K^+[/tex] and[tex]I^-[/tex] ions participate in the reaction, so this option is incorrect.
Therefore, the correct answer is:
A) [tex]Pb^{2+}, NO_3^-[/tex]
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Is the following equation balanced or unbalanced?
4 NH4OH + KAI(SO4)2.12H2O → Al(OH)3 + 2 (NH4)2SO4 + KOH + 12 H2O
Balanced
Unbalanced
calculate the mass of barium in 288mg of barium arsenate, ba3(aso4)2. give your answer in mg.
The mass of barium in 288 mg of barium arsenate (Ba3(AsO4)2) is approximately 0.462 mg.
The molar mass of Ba3(AsO4)2 can be calculated by summing the atomic masses of each element in the compound. The atomic masses are as follows:
Barium (Ba): 137.33 g/mol
Arsenic (As): 74.92 g/mol
Oxygen (O): 16.00 g/mol
Molar mass of Ba3(AsO4)2:
= (3 * 137.33 g/mol) + (2 * (74.92 g/mol + 4 * 16.00 g/mol))
= 411.99 g/mol + 207.84 g/mol
= 619.83 g/mol
Now, we can calculate the mass of barium in 288 mg of barium arsenate using the molar mass and the given mass.
Mass of barium:
= (mass of barium arsenate / molar mass of barium arsenate) * molar mass of barium
= (288 mg / 619.83 g/mol) * 411.99 g/mol
= 0.462 mg
The mass of barium in 288 mg of barium arsenate (Ba3(AsO4)2) is approximately 0.462 mg.
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liquids that mix completly are called
Answer:
Miscible
Explanation:
Mixed completely
Calibrated equipment will always have repeatable and reproducible measurements
a. True
b. False
a. True. If the equipment is accurately calibrated, it will have both repeatable and reproducible measurements.
Calibrated equipment refers to instruments or devices that have undergone a calibration process, which involves comparing the measurements of the equipment to a known standard. This process ensures that the equipment is accurate and reliable in its measurements.
When equipment is properly calibrated, it means that it has been adjusted or aligned to match a known reference point or standard, minimizing any systematic errors or uncertainties in its measurements. As a result, calibrated equipment should provide consistent and repeatable measurements when used under the same conditions.
Reproducibility, on the other hand, refers to the ability to obtain consistent results when the measurement is performed by different operators or in different locations using the same calibrated equipment and method.
Therefore, if the equipment is accurately calibrated, it will have both repeatable and reproducible measurements, making option a, "True," the correct answer.
Calibrated equipment is essential for ensuring the accuracy and reliability of measurements, and it facilitates both repeatability and reproducibility in obtaining consistent results.
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write equations showing how each weak base ionizes water to form oh-. also write the corresponding expression for kb.
a. NH3
b. HCO3-
c. CH3NH2
The chemical equations are as follows:
a. NH₃: NH₃ + H₂O ⇌ NH₄+ + OH⁻ (Kb = [NH4⁺][OH⁻] / [NH₃])
b. HCO₃-: HCO₃- + H₂O ⇌ H₂CO₃ + OH⁻ (Kb = [H₂CO₃][OH⁻] / [HCO₃⁻])
c. CH₃NH₂: CH₃NH₂ + H₂O ⇌ CH₃NH₃+ + OH⁻ (Kb = [CH₃NH₃⁺][OH⁻] / [CH₃NH₂])
a. NH₃ (ammonia):
NH₃ + H₂O ⇌ NH₄⁺ + OH⁻
The corresponding expression for Kb (base dissociation constant) is:
Kb = [NH₄⁺][OH⁻] / [NH₃]
b. HCO₃⁻ (bicarbonate):
HCO₃⁻ + H₂O ⇌ H₂CO₃ + OH⁻
The corresponding expression for Kb is:
Kb = [H₂CO₃][OH⁻] / [HCO₃⁻]
c. CH₃NH₂ (methylamine):
CH₃NH₂ + H₂O ⇌ CH₃NH₃+ + OH-
The corresponding expression for Kb is:
Kb = [CH₃NH₃⁺][OH⁻] / [CH₃NH₂]
In these equations, the weak base reacts with water to produce its conjugate acid (NH₄⁺, H₂CO₃, or CH₃NH₃⁺) and hydroxide ions (OH⁻). The Kb expression represents the equilibrium constant for the base ionization reaction and relates the concentrations of the products (conjugate acid and hydroxide ion) to the concentration of the weak base.
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Vinegar is added to baking soda and bubbles of carbon dioxide rapidly form. A cloudy liquid is left behind. What are products in this chemical reaction?
Answer:
When baking soda reacts with vinegar, one of the products produced is the gas carbon dioxide.
Answer:
The product left behind is carbon dioxide.
solid liquid and gas is physical or chemical explain
Answer: Physical change
Explanation: I said physical change because its changing the form of the substance and also solid to gas are sublimating
Could someone please care to explain what this is please
Answer:
cierra los ojos que me vengo o me vengo
Explanation:
cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengo cierra los ojos que me vengo o me vengcierra los ojos que me vengo o me vengoo
calculate gibbs free energy at 298k for the reaction of nitrogen and hydrogen to form ammonia if the reaction consists of
The Gibbs Free Energy at 298 K for the reaction of nitrogen and hydrogen to form ammonia is -149.2128 kJ/mol. Since this value is negative, it indicates that the reaction is spontaneous under standard conditions (i.e., at 298 K and 1 atm pressure)
The Gibbs Free Energy is one of the most important thermodynamic functions used to determine whether a chemical reaction is spontaneous or not at a given temperature and pressure. It is represented by the symbol "ΔG" and is defined as the difference between the enthalpy (ΔH) and entropy (ΔS) of a system at a constant temperature and pressure. The formula for Gibbs Free Energy is: ΔG = ΔH - TΔS, where T is the temperature in Kelvin (K).
The reaction of nitrogen and hydrogen to form ammonia can be represented by the following chemical equation: N2(g) + 3H2(g) → 2NH3(g)
To calculate the Gibbs Free Energy at 298 K for this reaction, we need to know the standard enthalpy change (ΔH°) and the standard entropy change (ΔS°) for the reaction. These values can be found in a standard thermodynamic data table or by using Hess's Law to calculate them from known enthalpies of formation.
For this reaction, the standard enthalpy change is -92.2 kJ/mol and the standard entropy change is +191.6 J/mol-K. Therefore, we can calculate the Gibbs Free Energy at 298 K using the formula:
ΔG° = ΔH° - TΔS°
= (-92.2 kJ/mol) - (298 K)(0.1916 kJ/mol-K)
= -92.2 kJ/mol - 57.0128 kJ/mol
= -149.2128 kJ/mol
Thus, the Gibbs Free Energy at 298 K for the reaction of nitrogen and hydrogen to form ammonia is -149.2128 kJ/mol. Since this value is negative, it indicates that the reaction is spontaneous under standard conditions (i.e., at 298 K and 1 atm pressure).
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We are performing the Williamson Ether Synthesis lab
Why is 12 M HCl added to the reaction mixture after the reaction was completed. (Choose all that apply)
To cause the product to precipitate..
To cause the coupling to occur.
To increase the solubility of the product.
To increase the polarity of the solution
To protonate the carboxylate group.
A student uses a-bromoacetic acid instead of a-chloroacetic acid for the reaction. Which statements below are correct? (Choose all that apply)
No change in the rate of the reaction would be observed because it does not depend on the nature of the halogen.
The reaction would be faster because the C-Br bond is weaker than the C-Cl bond.
The reaction would be faster because bromide is a better leaving group.
The reaction would be slower because bromide is a poorer leaving group.
The reaction would be slower because the C-Cl bond is weaker than the C-Br bond.
The correct statements are:
1. The reaction would be faster because bromide is a better leaving group.
2. The reaction would be slower because the C-Br bond is weaker than the C-Cl bond.Therefore, the correct options are B and D.
A student uses a-bromoacetic acid instead of a-chloroacetic acid for the reaction.
The reason why 12 M HCl is added to the reaction mixture after the reaction was completed in the Williamson Ether Synthesis lab is to protonate the carboxylate group of the product, thus causing it to precipitate.
The rate of the reaction is not dependent on the nature of halogen used in the reaction, so option A is incorrect. C-Br bond is weaker than the C-Cl bond, hence option B is correct. Bromide ion is a better leaving group than chloride ion, hence option C is correct.
As bromide ion is a better leaving group, it is easier to remove it from the substrate, and hence, the reaction would be faster. C-Br bond is weaker than C-Cl bond, hence the bond breakage would be easier and the reaction would be faster.
The C-Cl bond is weaker than the C-Br bond, hence the bond breakage would be easier and the reaction would be faster. Therefore, option E is incorrect.
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what are the advantages of using Fahrenheit ?
Answer:
You can better relate to the air temperature.
Explanation:
Fahrenheit gives you almost double the precision of Celsius without having to use decimals.
Does the +2 and -1 make a difference when solving for the Hrxn? What difference does it make?
Answer:
It would be a square plus b square and i am writing just so i can get pionts
Explanation:
TRUE OR FALSE?
It is not possible for wind can push an air parcel even higher in the troposphere, causing the parcel to cool and lose more energy, which will lead to more rainfall.
Answer:
The more water vapor in the air parcel, the more condensation can occur, and therefore, more rain. ... The air parcel then loses more energy, causing more rainfall. Wind pushes air parcels even higher in the troposphere, where it is colder. The air parcels will then lose more energy and more rain can happen.
I think is FALSE, is that right?
One of your bike tires has a volume of 18.2 L at temperature of 22.0°C. The temperature rises to 45.0°C when a sudden heat wave hits the DFW area. Calculate the new volume of your tire.
(3 sig figs)
Answer:
New volume = 19.61 L
Explanation:
Given that,
Initial volume, V₁ = 18.2 L
Initial temperature, T₁ = 22°C = 295 K
Final temperature, T₂ = 45°C = 318 K
We neeed to find the new volume of the tire. The relation between volume and temperature is given by :
[tex]V\propto T\\\\\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{18.2\times 318}{295}\\\\V_2=19.61\ L[/tex]
So, the new volume of the tire is equal to 19.61 L.
Answer:
19.61
Explanation:
It is easy, the mole is multiples by k and soforth
the potential energy of a pair of hydrogen atoms separated by a large distance x is given by u(x)=−c6/x6 , where c6 is a positive constant.
The potential energy (u) of a pair of hydrogen atoms separated by a large distance x is given by the equation = u(x) = -c6/x^6. The equation provided represents a simplified model of the interaction between hydrogen atoms, known as the Lennard-Jones potential.
In this equation, c6 is a positive constant that determines the strength of the interaction between the hydrogen atoms. The potential energy is inversely proportional to the sixth power of the distance between the atoms.
As the distance (x) between the hydrogen atoms increases, the potential energy decreases rapidly. This is because the negative sign indicates an attractive force between the atoms. The potential energy approaches zero as the distance between the atoms becomes very large.
Conversely, as the distance between the hydrogen atoms decreases, the potential energy becomes more negative, indicating a stronger attractive force between the atoms.
In reality, the interaction between atoms is more complex and involves other factors such as electron-electron repulsion and electron-nucleus attraction.
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exactly 56 grams of iron is mixed with 156 grams of oxygen. the elements are heated and they react. which choice best describes what remains after the reaction is complete?
Iron is the limiting reagent because it is completely used up in the reaction.
option B.
What is the chemical equation for the reaction?The chemical expression for the reaction between iron and oxygen is:
4Fe(s) + 3O₂ (g) 2Fe₂O₃ (s)
The number of moles of iron = mass of Fe/ molecular mass of Fe
The number of moles of Fe = 56 g/ 55.845 g/mol
The number of moles of Fe = 1.002 moles of Fe
The number of moles of oxygen = mass of oxygen/ molecular mass of oxygen
The number of moles of oxygen = 156 g /32 g/mol
The number of moles of oxygen = 4.875 moles of oxygen
Assume that Fe is the limiting reactant, the number of Fe₂O₃ can be calculated as:
moles of Fe₂O₃ = 1.002 mole of Fe × 2 moles of Fe₂O₃/ 4 moles of Fe
moles of Fe₂O₃ = 0.501 mole of Fe₂O₃
Assume that O₂ is the limiting factor, the number of Fe₂O₃ is:
moles of Fe₂O₃ = 4.875 moles of O₂ × 2 moles of Fe₂O₃/ 3 moles of O₂
moles of Fe₂O₃ = 3.25 mole of Fe₂O₃
Thus, after the reaction is complete, Fe and O₂ contain different moles of Fe₂O₃. Only Fe gets consumed in the reaction and it is the limiting factor.
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The complete question is below:
exactly 56 grams of iron is mixed with 156 grams of oxygen. the elements are heated and they react. which choice best describes what remains after the reaction is complete?
a. oxygen is the limiting reagent
b. iron is the limiting reagent
c. both are limiting reagent
d. none is limiting reagent
PLZ HELP!
Are water waves transverse or longitudinal? How do you know? IN YOUR OWN WORDS.
Explanation:
Transverse waves are always characterized by particle motion being perpendicular to wave motion. A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves.
in a dissolving metal reduction, ammonia serves as_________, and each sodium atom________. as a result, the alkyne is ___________to give an alkene product.
In a dissolving metal reduction, ammonia serves as a solvent, and each sodium atom acts as an electron donor. As a result, the alkyne is reduced to give an alkene product.
Dissolving metal reduction is a technique used to reduce alkynes to alkenes using an alkali metal, such as lithium or sodium, in liquid ammonia. During this process, the alkali metal dissolves in liquid ammonia to produce a deep blue color, which is a result of electrons being released from the alkali metal.
This process results in the formation of an intermediate solution containing free electrons that act as strong reducing agents, which can reduce the alkyne to an alkene. Therefore, in this reaction, ammonia serves as a solvent, while each sodium atom acts as an electron donor, leading to the reduction of the alkyne to form an alkene product.
Finally, we can say that in a dissolving metal reduction, ammonia serves as a solvent, and each sodium atom acts as an electron donor. As a result, the alkyne is reduced to give an alkene product.
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Which is the term for the different forms of a gene for a given trait?
Answer:
An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent.
Determination of Avogadro’s number using electrolysis.
Report your observations on the general changes of the electrodes with each electrolysis.
a. anode
b. cathode
The electrolysis of sodium chloride (NaCl) solution, chlorine gas is produced at the anode because the chloride ion (Cl-) has a greater tendency to pick up electrons than the hydroxide ion (OH-) in the water.2Cl- - 2e- → Cl2b. Cathode:During electrolysis, the cathode will gain electrons to form a negatively charged ion that is discharged. For example, in the electrolysis of sodium chloride (NaCl) solution, hydrogen gas is produced at the cathode because the hydrogen ion (H+) has a greater tendency to pick up electrons than the sodium ion (Na+) in the water.2H+ + 2e- → H2.
Avogadro’s number (NA) can be determined by electrolysis using the Faraday’s laws of electrolysis. Electrolysis is the process of separating or breaking down a compound by the action of an electric current into its constituent parts. Faraday's first law states that the amount of substance deposited or liberated during electrolysis is proportional to the quantity of electricity passed.Faraday's second law of electrolysis states that the weights of different substances that are liberated at the electrodes, on passing the same quantity of electricity through an electrolytic cell are proportional to their equivalent weight.Given below is the calculation for the determination of Avogadro’s number using electrolysis:Let's assume the current passed, I = 2 ATime taken, t = 1800 seconds (30 minutes)Atomic weight of copper, W = 63.5 g/molThe electrochemical equivalent of copper is given by Faraday’s first law asThe amount of copper deposited on cathode = itM / zFWhere,M = atomic mass or molar mass of copperz = number of electrons involved in the reaction (z = 2 in the case of copper)F = Faraday’s constant, i.e. 96500 C mol-1Thus, the number of moles of copper deposited is given byMoles of copper deposited = (itM / zF) = (2 × 1800 × 63.5) / (2 × 96500)= 0.117 gramsNumber of moles of copper atoms in 0.117 grams is given byMoles of copper atoms = (0.117 / 63.5) = 1.84 × 10-3 molesGiven that 1 mole of copper contains 6.02 × 1023 copper atoms or ions, the number of copper atoms or ions in 1.84 × 10-3 moles is given byNA = number of copper atoms or ions = (1.84 × 10-3 × 6.02 × 1023) / 1= 1.11 × 1021 atoms or ionsReport on the general changes of the electrodes with each electrolysisa. Anode:During electrolysis, the anode will gradually dissolve because it loses electrons to form a positively charged ion that goes into solution, allowing the reaction to occur. For example, in the electrolysis of sodium chloride (NaCl) solution, chlorine gas is produced at the anode because the chloride ion (Cl-) has a greater tendency to pick up electrons than the hydroxide ion (OH-) in the water.2Cl- - 2e- → Cl2b. Cathode:During electrolysis, the cathode will gain electrons to form a negatively charged ion that is discharged. For example, in the electrolysis of sodium chloride (NaCl) solution, hydrogen gas is produced at the cathode because the hydrogen ion (H+) has a greater tendency to pick up electrons than the sodium ion (Na+) in the water.2H+ + 2e- → H2.
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Which of the following substances will affect the solubility of BaF2 in aqueous solution? Select ALL that apply.
a. LiF
b. H2SO4
c. NaOH
d. BaCl2
e. KNO3
The substances that will affect the solubility of BaF[tex]_2[/tex] in an aqueous solution are LiF, H[tex]_2[/tex]SO[tex]_4[/tex], NaOH, and BaCl[tex]_2[/tex]. The correct answer is option a, b, c, and d.
The solubility of a compound refers to its ability to dissolve in a solvent. It is affected by a number of factors such as temperature, pressure, and the presence of other substances. In the case of BaF[tex]_2[/tex], its solubility can be influenced by other substances in the solution.
Here are the explanations of how each substance will affect the solubility of BaF[tex]_2[/tex]:
LiF (a) - Both BaF[tex]_2[/tex] and LiF are ionic compounds. Therefore, the presence of LiF in the solution can cause an increase in the solubility of BaF[tex]_2[/tex].
H[tex]_2[/tex]SO[tex]_4[/tex] (b) - Sulfuric acid (H[tex]_2[/tex]SO[tex]_4[/tex]) is a strong acid. When it dissociates in water, it produces [tex]H^+[/tex] ions. The presence of [tex]H^+[/tex] ions in the solution can decrease the solubility of BaF[tex]_2[/tex].
NaOH (c) - Sodium hydroxide (NaOH) is a strong base. When it dissociates in water, it produces [tex]OH^-[/tex] ions. The presence of [tex]OH^-[/tex] ions in the solution can increase the solubility of BaF[tex]_2[/tex].
BaCl[tex]_2[/tex] (d) - BaCl[tex]_2[/tex] is another ionic compound that can dissociate into [tex]Ba^{2+}[/tex] and [tex]Cl^-[/tex] ions in aqueous solution. The presence of [tex]Ba^{2+}[/tex] ions can have a significant impact on the solubility of BaF[tex]_2[/tex] as it can cause a decrease in its solubility.
KNO[tex]_3[/tex] (e) - Potassium nitrate (KNO[tex]_3[/tex]) is a neutral compound that is not expected to have any significant effect on the solubility of BaF[tex]_2[/tex].
Therefore, the correct answer is a. LiF, b. H[tex]_2[/tex]SO[tex]_4[/tex], c. NaOH, and d. BaCl[tex]_2[/tex].
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14. A 70 N tight rope walker is walking 20 meters above ground. About how much Gravitational Potential Energy does the performer have? 1,400 J 1,200 J 800 J
Answer:
It is 1,400 j
Explanation:
That is what i know
Answer:
1,400J
Explanation:
the formula for calculating Gravitational Potential Energy is mass×gravitational field strength×height
70×10×20=1,400
5 Facts about cell division
Answer:
Cell division is the process by which a cell, called the parent cell, divides into two cells, called daughter cells.[1] When the cell divides, everything inside it divides also. The nucleus and the chromosomes divide, and the mitochondria divide also.
In mitosis, an ordinary body (somatic) cell divides to make two daughter cells.
In meiosis, a cell divides twice, to produce four gametes (sex cells). The first division of meiosis is a special kind of cell division called a reduction division because the number of chromosomes is halved. The second division of meiosis is similar to mitosis.[2]
Three types of cell division: left is binary fission as in bacteria; right are mitosis and meiosis as in eukaryotes.
Cells are the 'building blocks' of life, and cell division is a basic feature of life. For simple unicellular organisms like Amoebozoa, one cell division reproduces the entire organism. On a larger scale, cell division can create offspring from multicellular organisms, such as plants that grow from cuttings. But most importantly, cell division enables organisms that are able to sexually reproduce to develop from the one-celled fertilised egg (zygote). Cell division also allows for continual renewal and repair of the organism.
The cell division is completed in the four phases prophase, metaphase, anaphase, and telophase.
What is cell division?It is the process by which cells divide into daughter cells. This keeps the cell organism to survive.
The five facts about cell division are:
The cell division has 4 phases.In prophase, the cell DNA condensed to form chromosomes.In metaphase, the chromosomes are aligned in the middle of the cell.In anaphase, the chromosomes move towards the different poles.In telophase cells divide into two daughter cells.Therefore, the cell division is completed in the four phases prophase, metaphase, anaphase, and telophase.
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Sodium phosphate has industrial uses ranging from clarifying crude sugar to manufacturing paper. It is sold as TSP in hardware stores and used in solution to remove boiler scale and to wash painted brick and concrete. What is the pH of a solution containing 33 g of Na PO, per liter? What is the [OH) of the solution? Show your work using units and correct sig. figs. Hints: (i.) Write the equation for the reaction between sodium phosphate and water. (ii.) You'll need the K of the hydrogen phosphate ion, HPO,, to calculate the K, of the phosphate ion, Po.". (iii.) Set up an I.C.E. table to calculate [OH). (iv.) Use the hydroxide ion concentration to determine the hydronium ion concentration and then the pH.
To determine the pH and [OH-] of a sodium phosphate solution, several steps need to be followed. The balanced equation for the reaction between sodium phosphate and water should be written, and the equilibrium constant (K) for the hydrogen phosphate ion (HPO_{4} ^{-2}) should be obtained. Using an I.C.E. table, the [OH-] can be calculated. From there, the hydronium ion concentration ([[tex]H_{3}O^{+}[/tex]]) can be determined, leading to the calculation of the pH.
The balanced equation for the reaction between sodium phosphate (Na_{3}PO_{4}) and water ([tex]H_{2}O[/tex]) can be written as follows:
[tex]Na_{3}PO_{4}[/tex] + H_{2}O ⇌ 3Na+ + [tex]PO_{4} ^{-3}[/tex] + H_{2}O
To determine the equilibrium constant (K) for the hydrogen phosphate ion (HPO_{4} ^{-2}), the K of the dihydrogen phosphate ion ([tex]HPO_{4} ^{-}[/tex]) is needed. This can be found in reference materials. Next, an I.C.E. (Initial, Change, Equilibrium) table can be set up to calculate the concentration of hydroxide ions ([OH^{-}]) in the solution. By knowing the concentration of sodium phosphate, the concentration of PO_{4} ^{-3}can be determined at equilibrium.
From the [[tex]OH^{-}[/tex]], the hydronium ion concentration ([H_{3}O^{+}]) can be calculated using the Kw (ionization constant for water) equation: Kw = [H_{3}O^{+}[OH^{-}] = 1.0 x 10^-14 at 25°C. Finally, the pH can be determined by taking the negative logarithm (base 10) of the [H_{3}O^{+}]. By following these steps, the pH and [OH^{-}] of the sodium phosphate solution containing 33 g of [tex]Na_{3}PO_{4}[/tex] per liter can be calculated using the appropriate units and significant figures.
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