Answer:
I'm sorry, I cannot provide exact temperature, salinity, or density values for specific ocean locations without further information. The values of these properties can vary greatly depending on many factors such as water depth, water circulation patterns, and local weather conditions. It is also worth noting that ocean temperature, salinity, and density can change over time and can fluctuate on a daily or seasonal basis.
Regarding the similarity in salinity in both areas, ocean salinity is primarily controlled by the balance between the input of freshwater from precipitation, rivers, and glaciers, and the output of salt through processes such as evaporation and the formation of sea ice. The similarity in salinity between two locations could be due to the presence of similar sources of freshwater or similar ocean circulation patterns that mix water from different sources and distribute salt and other dissolved substances evenly across the ocean. However, it is also possible that the salinity could be different due to other factors such as differences in ocean currents, water mixing, or local weather patterns.
A student claims that the reaction of hydrogen and oxygen to form water is evidence supporting the claim that mass is conserved in a chemical reaction. The chemical equation the student uses for the reaction is H₂ + O₂ --> H₂O. Does this evidence support the claim? Why or why not? (2 points)
Every chemical reaction follows the law of conservation of masses. . Here, the number of oxygen gas is not balanced and does not support the claim. The given reaction can be balanced and will obey the mass conservation.
What is mass conservation ?According to law of conservation of mass, the mass can neither be created nor be destroyed. Hence, the total mass of a system is conserved. For a chemical reaction, the total mass in the reactant side must be equal to the total mass in the product side.
Hence, no new atoms are created or no existing atoms are destroyed. Therefore, each element have to be equal in their number on both side of the reaction.
The given reaction can be balanced as follows:
[tex]\rm 2H_{2} + O_{2}\rightarrow 2H_{2}O[/tex]
Here, both the hydrogen and oxygen are equal in their number on both side and support the mass conservation.
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Conservation of Mass Unit Test
1. Matter may be lost to or gained from the surroundings.
2. Yes, it supports the claim because the equation is balanced.
3. The bubbling indicates a gas was formed, so some atoms formed gas; therefore, mass was transferred to the atmosphere.
4. one-twelfth the mass of a neutral carbon atom.
5. Mass is conserved because the number of each atom in the reactants equals the number of each atom in the products.
6. 129.59 g/mol.
7. the number of atoms in the reactants.
8. 2Fe2O3
9. 112 g CaO and 88 g CO2
10. 274 g
11. For every 3 moles of carbon dioxide produced, 5 moles of oxygen react.
12. 96
13. 1.776 x 10^22
14. Short answer (don't plagiarize)
15. Short answer (please don't plagiarize)
16. Short answer (pretty please don't plagiarize)
What do you call the introduction into fresh or ocean waters of chemical or biological substances that reduce the quality of the water?
Water pollution is the introduction of chemical or biological elements that degrade the quality of fresh or saltwater. Various factors, such as industrial waste, agricultural runoff, sewage discharge, and oil spills, can lead to water contamination.
These contaminants can damage aquatic life, destabilise ecosystems, and render water unfit for human consumption. Chemicals like heavy metals, nitrogen, and phosphorus, as well as germs and viruses, are a few examples of prevalent pollutants. Water pollution may have detrimental implications on both human and environmental health, ranging from the extinction of aquatic species to the development of waterborne infections. Many nations have created laws and policies targeted at minimising water pollution as a solution to the issue.
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A tall cylinder contains 30 cm of water. Oil is carefully poured into the cylinder, where it floats on top of the water, until the total liquid depth is 40 cm.
The total gauge pressure at the bottom is 3,822 Pa.
The oil and water form two separate layers in the cylinder, with the oil floating on top of the water.
The volume of the oil can be calculated by subtracting the volume of water from the total volume of the liquid. If the total liquid depth is 40 cm and the water depth is 30 cm, then the oil depth is 40 cm - 30 cm = 10 cm.
The volume of the oil can be found by multiplying the height of the oil by the cross-sectional area of the cylinder. The cross-sectional area can be calculated using the formula π[tex]r^{2}[/tex], where r is the radius of the cylinder. The height and radius of the cylinder would need to be known in order to find the exact volume of the oil.
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Propane (C3H8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below.
C3H8 + 5O2 → 3CO2 + 4H2O
How many grams of oxygen are required to produce 37.15 g CO2?
37.15 g CO2 =
g O2
Answer:
44.8 grams of O2
Explanation:
The balanced equation tells us that 5 moles of O2 are required for every 1 3 moles of CO2 produced. This is a molar ratio of (5 moles O2)/(3 moles CO2).
Calculate the moles of CO2 in 37,15 grams of CO2:
The molar mass of CO2 is (12 + 2*16) = 44 grams/mole.
37.15 grams of CO2 is therefore ( 37.15 grams)/(44 grams/mole) = 0.84 mole of CO2.
Now use the molar ratio from above to calculate moles of O2 required:
(0.84 mole CO2)*[(5 moles O2)/(3 moles CO2)] = 1.4 moles O2
Convert 1.4 moles O2 to grams O2 by multiplying by the molar mass of O2: (1.4 moles O2)*(32 g/mole O2) = 44.8 grams of O2
Answer: 45.02
thats what it is. Thats the answer. yep.
The number of ___________________ in the nucleus will determine if one atom is a different element than the other.
The number of neutron in the nucleus will determine if one atom is a different element than the other.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.
Space makes up the majority of an atom. The remainder is made up of a cloud of negative electrons around a positive-charged nucleus made up of protons and neutrons. The number of neutron in the nucleus will determine if one atom is a different element than the other.
Therefore, the number of neutron in the nucleus will determine if one atom is a different element than the other.
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in a covalent bond, the bond can be either polar or____
In a covalent bond, the bond can be either polar or nonpolar.
Polar bonds occur when two atoms of different electronegativity bond together, creating a molecule with a positive and negative end. The more electronegative atom attracts the electrons closer to its nucleus, resulting in a partial negative charge, while the less electronegative atom has a partial positive charge. Examples of polar molecules include water and hydrogen chloride. Nonpolar bonds occur when two atoms of similar electronegativity bond together, creating a molecule without a positive or negative end. The electrons are evenly shared between the two atoms, resulting in a neutral molecule. Examples of nonpolar molecules include carbon dioxide and methane. The polarity of a bond determines the physical and chemical properties of a molecule, including its solubility and reactivity.
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A beaker and the sample it contains have a mass of 67. 832 g. If the
beaker has a mass of 32. 331 g, what is the mass of the sample?
A beaker and the sample it contains have a mass of 67. 832 g. If the
beaker has a mass of 32. 331 g, the mass of the sample will be 35.501 g
What does a substance's mass mean?A material's mass is a measurement of how much matter is contained in that substance.
A balance is used to calculate the mass of a substance. By comparing the masses of two substances that contain an unknown amount of a specific ingredient, the unknown mass can be determined.
For instance, the following formula is used to determine the mass of a given substance sample:
Sample weight plus beaker weight = 75.652 g.
74.8 g is the weight of the beaker alone.
Sample mass is calculated as sample mass plus beaker mass minus beaker mass alone.
Sample mass: 67. 832 g - 32. 331 g = 35.501 g
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Why ammonia (nh3) is expected to be more chemically active than water (h2o)?
Ammonia (NH3) is expected to be more chemically active than water (H2O) because of differences in the electronegativity of the central atoms.
When comparing atoms in the same periodic row, the more electronegative an atom is, the less it will want to donate an electron pair. The electronegativity of nitrogen (N) is higher than that of oxygen (O), making nitrogen less likely to donate an electron pair, and therefore making NH3 more basic than H2O. This is why ammonia is considered to be more chemically active than water.
Electronegativity is a measure of an atom's ability to attract electrons toward itself within a chemical bond. The electronegativity of an atom is determined by its atomic number and electron configuration. The more electronegative an atom is, the greater its ability to attract electrons toward itself.
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What is the actual molecular mass of chlorine?
The actual molecular mass of chlorine is 35.5 g/mol or 177.86×[tex]10^{-24}[/tex]g
What is molecular mass with example ?
The molecular mass, also known as molecular weight, refers to the total mass of all atoms in a molecule. It is expressed in atomic mass units (amu) or grams per mole (g/mol).
The molecular mass of a molecule is calculated by adding up the atomic masses of all the atoms in its molecular formula. For example, the molecular formula of water (H2O) is made up of two hydrogen atoms (atomic mass of 1 amu each) and one oxygen atom (atomic mass of 16 amu).
The molecular mass of water is therefore 18 amu or 18 g/mol. This information is useful in fields such as chemistry and biochemistry, where it is used to determine the properties of molecules and to predict how they will behave in reactions.
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A student recovers 2.8mL of toluene from 7.0mL of a stock mixture containing cyclohexane and toluene in a 1:1 by volume. What is the percent recovery of toluene? a) 40% b) 50% c) 60% d) 80% e) 85% can you please show steps to solve problem and explain
Answer:
Below
Explanation:
The 7 ml of 1:1 stock mixture contained 3.5 ml of toluene.
recovered 2.8 ml
2.8 / 3.5 * 100% = 80% recovery
Student recovers the 2.8mL of toluene from 7.0mL of the stock mixture containing cyclohexane and toluene in the ratio 1:1 by volume. The percent recovery of the toluene is the correct option is a) 40%.
The total stock mixture = 7.0 mL
The recovered toluene = 2.8 mL
The ratio of the cyclohexane and the toluene = 1 : 1
The percent recovery of toluene is as follows :
Percent recovery of toluene = ( recovered toluene / total stock mixture) × 100 %
Percent recovery of toluene = (2.8 / 7) × 100 %
The Percent recovery of toluene = 40 %
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which element is diamagnetic? A. zn B. v C. rb D. li E. F
Option (E) . F (Fluorine (F), the most reactive chemical element and the lightest member of the halogen elements, or group 17 (group VIIa) of the periodic table)
What is the fluorine used for?
Fluorine is important in the manufacture of core materials for nuclear power plants and for the insulation of utility poles. Hydrogen fluoride, which is a fluorine compound, is used to etch glass. Fluorine, like Teflon, is used in the manufacture of plastics and is also important for dental health.
Why is the fluorine toxic?
Fluoride is very potent and irritant tissues comes contact. Depending on the gas concentration at the time of exposure, it can cause injuries ranging from mild irritation to chemical burns. Very irritating to lungs, mucous membranes, skin and eyes.
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Given the observed F2 data shown here from a typical three point linkage mapping cross, what is the distance between the roof and vestigial genes? Phenotype Observed Expected cinnabar, vestigial roof cinnabar, roof, vestigial wild type vestigial cinnabar, roof roof, vestigial cinnabar O 14.2 map units O 6.6map units O 13.5 map units O 7.3 map units O None of the Above
The observed F2 data shown is a typical three point linkage mapping cross. The distance between the roof and vestigial genes can be calculated based on the map units shown in the "Expected" column.
The distance between two genes on a chromosome is proportional to the frequency at which recombination occurs between them. The expected map units for the cross cinnabar, roof, vestigial to wild type is 13.5 map units, while the expected map units for the cross cinnabar, vestigial to roof is 6.6 map units. Therefore, the distance between the roof and vestigial genes is 6.9 map units (13.5 - 6.6).
The map units, also known as centimorgans (cM), are a measure of the genetic distance between two loci on a chromosome. The higher the frequency of recombination between two loci, the greater the distance between them. In this three-point linkage mapping cross, the expected map units for the cross cinnabar, roof, vestigial to wild type is 13.5 cM, while the expected map units for the cross cinnabar, vestigial to roof is 6.6 cM. By subtracting the latter from the former, we get 6.9 cM as the distance between the roof and vestigial genes.
This distance represents the average frequency of recombination between the roof and vestigial genes in the F2 population. It also indicates that there is a low probability of recombination occurring between these two genes, meaning they are likely located close to each other on the same chromosome. This information can be useful in determining the chromosomal location of these genes and in understanding their potential functional relationships.
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Strang 7.3.6) Consider a general 3-by-3 covariance matrix, S = AAT: s $12 813 S = 5123 523 3 $13523 92 (a) Find a diagonal matrix D that will produce a correlation matrix with ones on the diagonal C = (DA)(DA)" = DSD": (b) Find the matrix C referenced in (a): C=DSD 1 C12 C13 C12 1 C23 013223
The matrix S represents covariance, whereas the matrix C represents correlation. Normalizing the covariance matrix with the standard deviations of each variable yields the correlation matrix.
(a) The square roots of the variances along S's diagonal can be used to compute a diagonal matrix D. The pieces along S's major diagonal provide the variances. Let's call the differences 12, 22, and 32. The diagonal matrix D is then: D = [σ1 0 0; 0 σ2 0; 0 0 σ3] (b) C = DSD' gives the correlation matrix C, where S is the covariance matrix and D is the diagonal matrix obtained in C's elements are supplied by: C = [σ1^2 0 0; 0 σ2^2 0; 0 0 σ3^2] * [s12 / (σ1 * σ2) s13 / (σ1 * σ3) s23 / (σ2 * σ3) [s12 / (σ1 * σ2) σ2^2 / (σ1^2) s23 / (σ2 * σ3)] [s13 / (σ1 * σ3) s23 / (σ2 * σ3) σ3^2 / (σ3^2)] As a consequence, the components of C are the standardized covariances between the variables, scaled by the product of their standard deviations, resulting in a correlation matrix with ones on the diagonal.
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how many moles of lithium are needed to completely react with 4.6 mol br2? 2li br2  2libr
The number of the moles of lithium are needed to completely react with 4.6 mol Br₂ is 9.2 mol.
The balanced chemical reaction is :
2Li + Br₂ ----> 2LiBr
The number of the moles of the = 4.6 mol
It is clear from the above balanced chemical equation that :
1 mole of the Br₂ react with the 2 mole of the Li
The moles of the Li = 2 × 4.6 moles of Li
The moles of the Li = 9.2 mol of the Li
The number of the moles = mass / molar mass
Thus, the number of the moles of the Li is 9.2 mol.
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what two elements are exceptions to electron configuration
Chromium and copper are the two primary exceptions to electron configuration.
Because a fully or largely filled d sub-level is more stable than a partially filled d sub-level in these instances, an electron from the 4s orbital gets excited and climbs to the 3d orbital.
Exceptions are made because half-full or full shells or subshells are more stable than partially filled shells or subshells. When the energy level difference between two subshells is modest, an electron may move to the higher level shell to fully or partially fill it.
The valence electrons of transition metals are located in the d subshell. It is far more preferable (and stable) to have a shell that is either half full or completely full rather than somewhat filled.
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Culinary Arts and Hospitality I (DOE 7173)
This is an example of exclusivity. Option C
What is exclusivity in hospitality?
Exclusivity in hospitality refers to the provision of privileged or special treatment to guests, typically in high-end hotels or resorts. This can involve a range of services and amenities such as private rooms, VIP check-in, personalized attention from staff, access to exclusive areas, and high-end dining experiences.
The goal of exclusivity in hospitality is to provide guests with a luxurious, personalized, and memorable experience, differentiating it from more standard forms of hospitality.
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Any material made of two or more substances that can be physically separated?
Materials made of two or more substances that can be physically separated are homogeneous and heterogeneous.
What is substance?The matter is something that exists by itself and continues to exist when conditions and properties change. The substance consists of two types, namely pure substances or elements and compounds and mixtures or homogeneous mixtures and heterogeneous mixtures.
Chemical changes cause a substance to appear with different types and properties from the original substance. Homogeneous and heterogeneous mixtures are substances that can be separated physically. the matter has mass and occupies space. Based on the shape, substances are classified into three types namely solid, liquid, and gas.
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What is the chemical equation for calcium hydroxide?
Slaked lime is another name for the inorganic substance calcium hydroxide. If calcium oxide is combined with water, it forms a colorless crystal or even a white powder.
How well-versed are you in calcium?
The chemical element calcium (Ca) belongs to the Group 2 (Institute of internal auditors) of the chemical elements and is an alkaline-earth metal. It is the fifth most prevalent element in the Earth's crust and the most prevalent metallic element in human tissue. The 118 elements that make up the periodic table
What is the ideal calcium source?
The main food sources of calcium for Americans are milk, yogurt, and cheeses [1]. Calcium is abundant in these natural sources. Vegetable sources other than dairy include Chinese
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Which tool is most useful for measuring 12 milliliters of saltwater?
In order to maintain the accuracy of results , the tool which is most useful for measuring 12 milliliters of saltwater is graduated pipette.
What is accuracy?
Accuracy in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:
1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.
2)Percentage of true value--It is the accuracy which is determined by identifying accuracy of the instrument and comparing it with the measured true value.
3)Percentage of scale range- It is the accuracy which determines accuracy of the measurement.
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Which compound has the lowest vapor pressure at 50C
Answer: Water
Explanation: In water, the hydrogen is bonded to an electronegative oxygen, and it can form hydrogen bonds. These are strong and thus keep the molecules together (molecules can not escape). Therefore, the compound with the lowest vapor pressure will be water.
lead (ii) carbonate has a ksp of 1.5 x 10-13. what is the molar solubility?
The molar solubility of Lead (II) carbonate is 3.87 × 10⁻⁷.
Molar solubility (M) is defined as a unit of measurement for a compound's capacity to dissolve in a particular liquid, also known as a solvent. Molar solubility is generally measured in terms of moles/L since it is the most moles of a solute that can dissolve in one liter of solvent. The solution is known to be saturated when it can no longer dissolve any more solute and the number of moles dissolved in a liter of solvent equals the molar solubility.
The ionization equation for PbCO₃ is given as:
PbCO₃ → Pb²⁺ + CO₃²⁻
Ksp = [Pb²⁺][CO₃²⁻] = (Molar solubility)²
Given,
Ksp = 1.5 x 10⁻¹³
Molar solubility = √(Ksp)
⇒ Molar solubility = √(1.5×10⁻¹³)
⇒ Molar solubility = 3.87 × 10⁻⁷
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if the mass percent of oxygen in na2cr2o7 is 42.8%, what is the mass of oxygen atoms in grams in 12.3 grams of na2cr2o7?
The mass of oxygen atoms in 12.3 g of Na2Cr2O7 is 5.27 g.
What is Sodium dichromate?
Sodium dichromate is the inorganic compound with the formula Na₂Cr₂O₇.
If the mass percent of oxygen in Na2Cr2O7 is 42.8%, then the mass of oxygen atoms in 100 g of Na2Cr2O7 would be 42.8 g.
To find the mass of oxygen atoms in 12.3 g of Na2Cr2O7.
we can simply multiply the mass of oxygen in 100 g of Na2Cr2O7 by 12.3 g and divide by 100 g:
Mass of oxygen in 12.3 g of Na2Cr2O7 = (42.8 g / 100 g) * 12.3 g
Mass of oxygen in 12.3 g of Na2Cr2O7 = 5.27 g
So the mass of oxygen atoms in 12.3 g of Na2Cr2O7 is 5.27 g
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a 32 oz (1l) bottle of mountain dew contains 124 grams of sugar (fructose) and 4.5 mg caffeine what is the chemical formula for fructose? what is the concentration of sugar in mg/l? what is the molar concentration of sugar ? what is the concentration of sugar in % (by weight)? what is the concentration of sugar in ppm (parts per million)? what is the molar concentration of caffeine? what is the concentration of caffeine in % (by weight)? what is the concentration of caffeine in ppm (parts per million)? what is the concentration of water in % what is the concentration of water in ppm (parts per million)? calculate an approximate density if the suga is fully dissolved in the
The density of the sugar solution can be estimated to be (124 g + 32 oz) / 32 oz = 4 g/mL.
The chemical formula for fructose is C6H12O6.
The concentration of sugar in mg/L is 124000 mg/L.
The molar concentration of sugar is (124000 mg/L) / (180.16 g/mol) = 688.2 mM.
The concentration of sugar in % (by weight) is (124 g / 32 oz) * 100% = 387.5%.
The concentration of sugar in ppm (parts per million) is (124000 mg / 32 oz) * (1000000 mg/L) = 388000000 ppm.
The molar concentration of caffeine is (4.5 mg / 194.19 g/mol) = 0.023 mM.
The concentration of caffeine in % (by weight) is (4.5 mg / 32 oz) * 100% = 0.14%.
The concentration of caffeine in ppm (parts per million) is (4.5 mg / 32 oz) * (1000000 mg/L) = 14000 ppm.
The concentration of water in % (by weight) is 100% - 387.5% - 0.14% = 62.36%.
The concentration of water in ppm (parts per million) is (32 oz - 124 g - 4.5 mg) * (1000000 mg/L) / 32 oz = 62,360,000 ppm.
An approximate density of the sugar solution (assuming all sugar is fully dissolved in water) can be calculated using the density of water, which is about 1 g/mL. The density of the sugar solution can be estimated to be (124 g + 32 oz) / 32 oz = 4 g/mL.
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which of the results in a solution that is 5 m nacl?
A solution of 5 millimoles of sodium chloride per litre is referred to as a 5 mM NaCl solution.
The unit for measuring solute concentration in biological solutions, the millimole (mM), is used to express this concentration. A certain quantity of sodium chloride must be weighed and dissolved in water to a final volume of one litre in order to create a 5 mM NaCl solution. To get the desired 5 mM concentration, the solution's concentration can be tested and altered as needed. The solution can be used as a control for research or to represent physiological salt concentrations in a variety of biological and biochemical applications.
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What type of reactions are essentially opposites of one another?
Combustion and sythesis
Single replacement and double replacement
Synthesis and single replacement
Synthesis and decomposition
Combustion and synthesis are essentially opposites of one another. Single replacement and double replacement reactions are also opposites of one another.
Synthesis and single replacement reactions are not opposites of one another, but synthesis and decomposition reactions are opposites of one another.
There are several types of reactions, including synthesis reactions, decomposition reactions, single-replacement reactions, double-replacement reactions, combustion reactions, displacement reactions, photoactivation switch reactions, tyrosine ligation reactions, Guerbet-type reactions, and drug hypersensitivity reactions.
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Which substance will exhibit hydrogen bonding between molecules?
a. CH_3CH_2-OH
b. (CH_3)_3 N
c. HI
d. CH_3-O-CH_3
e. CH_3CH_2-F
The correct option is A. Out of the following compound Ethanol (C2H5OH) exhibit hydrogen bonding because in ethanol H atom is directly attached with O atom.
Hydrogen bond formed when H atom is attached with any electronegative atom such as Oxygen or Nitrogen by sharing of electron that is by covalent bonding. In this case the difference in their electronegativity makes the covalent bond polar and make H atom partially positive. This partially positive H atom attracts an another partially negative atom of O which results in the electrostatic attraction between them which leads to H bonding. Presence of alcoholic group (OH) in ethanol is responsible for the H bonding. Highly electronegative elements such as Chlorine Cl, Fluorine F also exhibits Hydrogen bonding.
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Sodium chloride (nacl) is an ionic compound. We can effectively model it as sodium atoms with one electron removed next to chlorine atoms with one electron added. The attractive force between the positive and negative charges holds the crystal together.
Yes, that is correct. Sodium chloride (NaCl) is an ionic compound composed of sodium (Na+) cations and chloride (Cl-) anions held together by electrostatic forces.
In this compound, sodium atoms have one electron removed (Na+), while chlorine atoms have one electron added (Cl-). The electrostatic forces of attraction between the positive and negative charges of the ions is what holds the crystal lattice together.
Ionic compounds such as sodium chloride (NaCl) are composed of a lattice of positive and negative ions. The cations and anions are held together in the lattice by strong electrostatic forces of attraction. The ions are arranged in an orderly fashion in the lattice and this arrangement is what gives the compound its physical properties.
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A tank contains 2m3of air at -93 ∘C and a gage pressure of 1.4 MPa. Determine the mass of air, in kg. The local atmospheric pressure is 1 atm.
To determine the mass of air in the tank, we need to first find its absolute pressure and then use the Ideal Gas Law:
PV = nRT, where P is the absolute pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin.
First, let's convert the temperature to Kelvin: -93 + 273.15 = 180.15 K.
Next, we need to find the absolute pressure, which is the gage pressure plus the atmospheric pressure. In this case, the absolute pressure is 1.4 MPa + 1 atm = 2.4 MPa.
Now, we can plug in the values and solve for n:
2.4 MPa * 2 m^3 = n * 8.31 J/mol * 180.15 K
n = (2.4 MPa * 2 m^3) / (8.31 J/mol * 180.15 K)
Finally, we can use the molar mass of air (about 28.97 g/mol) to convert n to mass:
mass = n * molar mass = (2.4 MPa * 2 m^3) / (8.31 J/mol * 180.15 K) * 28.97 g/mol
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The K a of propanoic acid ( C 2 H 5 COOH ) is 1. 34 × 10 − 5. Calculate the pH of the solution and the concentrations of C 2 H 5 COOH and C 2 H 5 COO − in a 0. 597 M propanoic acid solution at equilibrium
The pH of the solution is 2.55 and the concentrations of C₂H₅COOH and C₂H₅COO⁻ are 0.594 M and 0.00282 M respectively.
The following chemical equation describes how propanoic acid, a weak acid, will ionise in water.
C₂H₅COOH(aq) + H₂O(l) ↔ C₂H₅COO⁻(aq) + H₃O⁺(aq)
The concentration of the initial solution of propanoic acid is 0.597 M.
The Ka of propanoic acid is 1.34 × 10⁻⁵.
Let the concentration of each of the products is x.
Now, We have Ka = [C₂H₅COO⁻] [H₃O⁺] / [C₂H₅COOH] [H₂O]
or, 1.34 × 10⁻⁵ = x × x / 0.597
or, x² = 0.8 × 10⁻⁵
or, x = 2.82 × 10⁻³ M
or, x = 0.00282 M
So, concentration of C₂H₅COO⁻ = x = 0.00282 M
Concentration of C₂H₅COOH = 0.597 - 0.00282 = 0.594 M
Now, pH of solution = -log[H₃O⁺] = -log[x] = -log(0.00282) = 2.55
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Imagine you are calling out to your friend as they are walking towards you. How is your friend able to hear the sound you create?
Crests and troughs are created to carry sound waves through air molecules.
Compression and rarefactions carry sound waves through air molecules.
Crests and troughs are created to carry sound waves through moisture in the air (water molecules).
Compressions and rarefactions carry sound waves by bouncing off of solid structures between you and your friend.
Answer:
Compression and rarefactions carry sound waves through air molecules.
Explanation: