The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
Molarity= number of moles of solute/volume of solution in litre
Where,
moles= given weight /by molecular weight
= 0.285 g/ 40
=0.0071moles
Substituting values in equation 1
Molarity=0.0071/0.350
Molarity=0.020M
Therefore, 0.020M is the [OH⁻] in a solution that contains 0.285 g of NaOH in 0.350 L of solution.
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A sample of a certain lead compound contains 12.92 g of lead for 2 g of oxygen. A second sample has mass of 34.27 g and contains 14.39 g of oxygen. Are the two compound the same
The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.
What is a chemical compound?A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.
What are the calculations?sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .
sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .
so, the ratios are not the same.
Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.
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list the original states (solid, liquid, or gas) of the solute and solvent that are combined to make each of the following solutions.
These are the combinations for the original states (solid, liquid, or gas) of the solute and solvent.
What is solute?
The term "solute" refers to a material that has dissolved in a solution. In fluid solutions, there are more solvent molecules than solute molecules. Salinity and water are two excellent examples of solutes in daily life. The solute is salt because it dissolves in water.
What is solvent?
The ingredients that are utilized as solutes in the formulation are dissolved using solvents. Solids, liquids, or gases may make up these solutes. In order to obtain a solution, a suitable solvent is utilized in conjunction with the solute.
Hypotonic, isotonic and hypertonic solutions (tonicity).
Solute-Solvent Combinations.
Gas-Gas Solutions.
Solid-Solid Solutions.
Liquid-Liquid Solutions.
Therefore, these are the combinations for the original states (solid, liquid, or gas) of the solute and solvent.
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If this diagram represents sugar in water, what factors affect solubility? (Choose all that apply.
stirring the mixture
temperature of the mixture
volume of container
using finer particles of sugar
If this diagram represents sugar in water -
temperature of the mixture, this factor affect the solubility.
What is solubility?The maximum quantity of a chemical that will dissolve in a given amount of solvent at a particular temperature is referred to as its solubility. A synonym for solvability is soluble.
If a solute is a solid or liquid, its solubility rises as the temperature rises. In comparison to cold water, hot water can facilitate the dissolution of sugar. A gas-based solute becomes less soluble as temperature rises. For instance, warm water may dissolve carbon dioxide more easily than cold water.
Thus, temperature of the mixture is the factor that affect the solubility.
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Work through Example 17.9. Then, calculate how many minutes it will take to plate out 10.0 g of zinc using a current of 5.0 A? Hint: first write an equation for the reduction of zinc ions to elemental zinc.
The time to plate out 10.0 g of zinc using a current of 5.0 A is 98.35 minutes.
The reduction reaction in the electrolysis reaction of zinc
Zn²⁺ + 2e → Zn.
Based on stoichiometry, the number of moles is proportional to the number of reacting atoms or ions.
Number of moles for Zn
n = m ÷ Mr
n = 10.0 ÷ 65.4 = 0.153 mol
Number of moles for electrons
n Zn : n e = 1 : 2
n e = 2 × n Zn
n e = 2 × 0.153 = 0.306 mol
The equation for the number of moles of an electron from Faraday's law
n e = It ÷ 96,485
It = n e × 96,485
5.0 × t = 0.306 × 96,485
t = 29,506.12 ÷ 5
t = 5,901.22 s
t = 5,901.22 ÷ 60 minutes
t = 98.35 minutes
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The pH of a fruit juice is 2.5. Find the hydronium ion concentration, [H₃O⁺]of the juices. Use the formula pH=-log[H₃O⁺]
The hydronium ion concentration [H₃O⁺]is approximately_____ moles per liter
(Use scientific notation. Use the multiplication symbol in the math palates as needed. Round to the nearest tenth as needed.)
The hydronium ion concentration [H₃O⁺]is approximately 3.16 x 10^-3 moles per liter.
The pH of a solution is a measure of hydrogen ion concentration, which in turn is a measure of its acidity.
The pH of a fruit juice is 2.5.
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter (molarity).
By the formula,
pH=-log[H₃O⁺]
2.5 = -log[H₃O⁺]
-2.5 = log[H3O+]
[H3O+] = antilogarithm(-2.5)
[H3O+] = 3.16 x 10^-3 moles.
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The hydronium ion concentration [H₃O⁺] of a fruit juice with pH 2.5 is 3.16 × 10⁻³ moles per litre.
The pH of a solution is defined as the hydrogen ion concentration present is a substance. The more the hydrogen ion concentration, more is the acidity of the substance.
In order to calculate the pH of an aqueous solution, firstly we must know the concentration of hydronium ion [H₃O⁺] in moles per litre which is given by the formula
pH = -log [H₃O⁺]
From here, another defination of pH is that pH is equl to the negative logarithm of the hydronium ion concentration.
According to the question,
given
pH of fruit juice = 2.5
To find: hydronium ion concentration [H₃O⁺]
Thus, by formula
2.5= -log[H₃O⁺]
[H₃O⁺]= antilogarithm (-2.5)
[H₃O⁺] = 3.16 × 10⁻³ moles per litre.
Thus, the hydronium ion concentration [H₃O⁺] is 3.16 × 10⁻³ moles per litre.
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222222222222222222222222222222222222222222
Answer:
Explanation:
Yes
4. Many scientists agree that gluten insensitivity stems from an inability to break bonds. Some scientists blame gluten insensitivity specifically on a lack of human-made enzymes. Other scientists blame it on an imbalance in the microbiome (the bacteria that live in our intestines )How could they both be correct ?
The human digestion-resistant gluten peptides can be broken down by a number of enzymes, including cysteine proteases, and subtilisins.
What is enzyme ?Proteins called enzymes serve as biological catalysts by quickening chemical reactions. Substrates are the molecules that enzymes can interact with, and the enzyme changes the substrates into other molecules known as products.
Human saliva contains Rothia bacteria that can degrade gluten components that trigger an inflammatory immune response and are normally insensitive to the digestion enzymes produced by animals.
Thus, the human digestion-resistant gluten peptides can be broken down by a number of enzymes.
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two of the following statements are true, select them. two of the following statements are true, select them. a hydrogen atom in the n
Radius of the second orbit is 4 times the radius of the first orbit.
KE∝ 1/n²
So, kinetic energy is maximum in 1st orbit.
(Radius)n ∝ n²/z
r2 = k(4); r1 = k(1)
∴ Radius of the second orbit is 4 times the first orbit.
What is radius?
If the object has no center, the term can refer to its circumferential radius, the radius of its circumscribed circle, or circumscribed sphere. In any case, the radius can be greater than half the diameter, which is usually defined as the maximum distance between any two points in the image. The radius of a geometric figure is usually the radius of the largest circle or sphere contained within it. The radius of a regular polygon is also called an apothem. In graph theory, the radius of a graph is minimal over all vertices at the maximum distance from u to any other vertex of the graph.To know more about radius, click the link given below:
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i want to be taught chemistry
Question 1-3
A balloon with a volume of 2.50 L is left in a car at 323K. After sitting in the sun, the temperature increases to 398K. What is the volume
of the heated balloon?
Answer:
[tex] \huge{\boxed{3.08 \: L}} [/tex]
Explanation:
The volume of the heated balloon can be found by using the Charles' law formula which is;
[tex] \bold{\frac{V_1}{T_1} = \frac{V_2}{T_2}} \\ [/tex]
where
T1 is the initial temperature
T2 is the final temperature
V1 is the initial volume
V2 is the final volume
From the question
T1 = 323K
T2 = 398K
V1 = 2.5 L V2 = ?
[tex] V_2 = \frac{V_1 \times T_2}{T_1} \\ [/tex]
[tex] V_2 = \frac{2.5 \times 398}{323} = \frac{995}{323} \\ = 3.0804 [/tex]
We have the final answer as
3.08 LA gas has an initial volume o 5.32L at 371K. The same gas now has a volume of 4.90 Lat 273
K and 1.03 atm. What was the original pressure of the gas?
Type your answer...
Answer:1.29atm
Explanation: We are given P2,V1,V2,T1, and T2. We are looking for P1.
We can plug it into the combined gas laws formula.
[tex]\frac{(P1)(V1)}{T1} =\frac{(P2)(V2)}{T2}[/tex] [tex]P1=\frac{(P2)(T1)(V2)}{(T2)(V1)}[/tex]P1 = ?
V1 = 5.31 L
T1 = 371 K
P2 = 1.03 atm
V2 = 4.90 L
T2 = 273 K
[tex]P1 = \frac{(1.03)(371)(4.90)}{(273)(5.31)} \\[/tex]
P1 = 1.29 atm
What is the percent composition of Fluorine (F) in the compound XeF6?
Od
26.258%
12.520%
110.76%
46.472%
The percent by mass of the fluorine in the compound is 46.472%.
What is the percent by mass?We know that the percent by mass has to do with the ratio of the total mass of the atom that is part of the compound and the total molar mass of the compound multiplied by one hundred.
The question in this case has demanded that we ought to obtain the mass percent of fluorine from the compound that we can be able to identify from the formula of the compound that is shown here as xenon hexa fluoride.
Mass of the compound can be obtained from; 131 + 6(19)
= 245 g/mol
The total mass of the fluorine atom in the compound is 114 g
Thus we have the use of; 114 /245 * 100/1
= 46.472%
The percent by mass is now gotten for the fluorine atom as 46.472%.
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Which statement below best describes SO2 with respect to the polarity of bonds and the polarity of the molecule? A) SO2 has polar S-O bonds and is a non-polar molecule. B. SO2 has polar S-O bonds and is a polar molecule. C) SO2 is neither a polar nor a non-polar molecule but is rather an ionic compound. D) SO2 has non-polar S-O bonds and is a polar molecule. E) SO2 has non-polar S-O bonds and is a non-polar molecule.
The statement below best describes SO₂ with respect to the polarity of bonds and the polarity of the molecule is B) SO₂ has polar S-O bonds and is a polar molecule.
The SO₂ is an covalent bond. the bond between the sulfur and the oxygen atom is the covalent bond. the oxygen atom is more electronegative than the sulfur atom . the oxygen atom attract the shared paired of the electron towards it self. thus it makes the S - O bond polar bond. the each S - O bond is polar bond. the net dipole moment in the SO₂ molecule is greater than zero due to the unequal sharing of the electrons.
Thus, the SO₂ molecules is the polar molecule.
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the accepted density of a certain material is 7.44 g/cm^3. A student measures the density of the same material as 7.30 g/cm3. What is the percentage error of the measurement?
The percentage error of the measurement, given that the accepted measurement is 7.44 g/cm³, is 1.88%
How do I determine the percentage error?First, we shall determine the absolut error. This can be obtained as follow:
Accepted value = 7.44 g/cm³Measured value = 7.30 g/cm³Absolute error = ?Absolute error = accepted value - measured value
Absolute error = 7.44 - 7.30
Absolute error = 0.14 g/cm³
Haven obtained the absolute error, we shall determine the percentage error. Details below:
Absolute error = 0.14 g/cm³Accepted value = 7.44 g/cm³Percentage error =?Percentage error = (Absolute error / accepted value) × 100
Percentage error = (0.14 / 7.44) × 100
Percentage error = 1.88%
Thus, we can conclude that the percentage error is 1.88%
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What is the de Broglie wavelength of an electron traveling at 1.59×105m/s ?
The de Broglie wavelength of an electron traveling at 1.59×105m/s is 0.4547 x 10⁻⁹ m.
What is an electron ?The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.
The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.
λ = h/mv
Where,
λ = wavelength of electron
m = mass of electron = 9.11e-31 kg
v = speed of electron = 1.59 × 10⁵ m/s
h = constant
Therefore,
λ = (6.626x10⁻³⁴J-s) ÷ [(9.11e-31 kg) (1.59 x 10⁵ m/s)]
λ = 0.4547 x 10⁻⁹ m
Thus, The de Broglie wavelength of an electron traveling at 1.59×105m/s is 0.4547 x 10⁻⁹ m.
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when the electron moves closer to the nucleus, the energy increases to overcome the positive and negative attractions.
Yes, this is correct. When an electron moves closer to the nucleus, the electrical attraction between the electron and the nucleus increases and the electron must expend more energy to stay in that position. This increase in energy is due to the increased force of attraction between the electron and the nucleus.
The Effect of Electrostatic Attraction on Electron EnergyThe interaction between electrons and the nuclei of atoms is the basis of chemistry. This interaction is due to the attractive force of electric charge, which is known as electrostatic attraction. This force can be felt when an electrically charged object approaches another electrically charged object.
The electrostatic attraction between an electron and the nucleus of an atom depends on the electric charge and the distance between them. The more charged the electron is, the stronger the attraction. The closer the electron is to the nucleus, the stronger the attraction.
This means that when an electron moves toward the nucleus, the electrostatic attraction between them increases, requiring the electron to expend more energy to stay there. This means that when an electron moves closer to the nucleus, the energy of the electron increases to overcome the positive and negative attraction.
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What is the molar mass of a gas with a density of 3.786 g/L at STP? Which noble gas is it most likely to be?
Answer:
The molar mass of a gas can be calculated by dividing the density of the gas by its molar density at STP, which is 0.08206 g/L. Therefore, the molar mass of the gas is 3.786 g/L / 0.08206 g/L = 46.3 g/mol.
The most likely noble gas with a molar mass of 46.3 g/mol is Xenon (Xe), which has a molar mass of 131 g/mol.
Explanation:
Ag3P ionic or molecular
Answer:
ionic ionic ionic
Explanation:
it just is
How many moles of NaOH are present in 27.0 mL of 0.160 M NaOH?
moles of NaOH:
I will thumbs up help please !
it's similar I think explained everything right , I hope I helped
Dr
Carries oxygen-rich blood and
nutrients away from the heart
to the rest of the body
Carries carbon
dioxide-rich blood
back to the heart
3
Exchanges gases to remove
carbon dioxide and add
oxygen to blood
Responsible for
pumping blood
throughout the body
Transports oxygen-depleted
blood to the lungs to exchange
CO₂ for O,
Transports oxygen-rich blood
to the heart to redistribute to
the rest of the body
 dragon drop 
During the light reactions of photosynthesis, ATP can be generated either by linear electron flow or cyclic electron flow. Which of the following best explains differences between these two mechanisms? ( 2 points)Cyclic electron flow uses only photosystem I and does not produce NADPH or release oxygen.Cyclic electron flow uses photosystems I and II and produces NAPPH but does not release oxygen.Linear electron flow uses only photosystem II but produces NADPH and releases oxygen.Linear electron flow uses photosystems I and II and releases oxygen but does not produce NADPH.
The PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP.
What is ATP?
The energy used and stored by cells is derived from adenosine triphosphate (ATP). Adenine, a ribose sugar, and three serially linked phosphate groups make up the nucleoside triphosphate (nucleoside) structure of ATP.
What is electron ?
A negatively charged subatomic particle called an electron can be either attached to or detached from an atom (not bound). Along with protons and neutrons, the electron is one of the three primary particle types found inside an atom.
The PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP. Contrarily, cyclic electron flow (CEF) recycles electrons around PSI by diverting them away from ferredoxin (Fd) and toward the plastoquinone (PQ).
Therefore, the PSs work in series to move electrons from water to NADP+ while simultaneously producing NADPH and ATP.
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a radioactive isotope, like 14c, can be used to accurately date something up to about half-lives.
A radioactive isotope, like 14c, can be used to accurately date something up to about half-lives.
Carbon-14 has a half-life of 5,730 ± 40 years (i.e., half the amount of the isotope present at any instant will undergo spontaneous disintegration during the succeeding 5,730 years).
What is an isotope?
The first 80 elements in the periodic table have stable isotopes. The properties of stable isotopes allow their use to understand and manage water and soil resources. They are also used in environmental studies, nutritional assessment and forensic science.Naturally occurring stable isotopes, such as hydrogen isotopes, are used by measuring their abundance and ratio in water samples to determine the age and origin of water, understand its history, and recognize its sources. This is known as isotopic hydrology.To know more about isotopes of elements, click the link given below:
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when a substance goes under evaporation does energy increase or decrease 
Answer:
it decreases and lowers the average energy of the remaining liquid molecules
in the solid state, which of the following forces ammonium acetate units, nh4c2h3o2, to each other? (select all that apply) london dispersion forces dipole-dipole forces hydrogen bonds ion-ion
Ammonium acetate (nh4c2h3o2) is attracted to other ions by ion-ion attraction.
Describe solid state.When the constituent particles of a substance are very tightly packed together, the result is a solid state of matter. A solid substance contains atom, volume, ions, as well as other constituent particles. A solid's shape, weight, and volume are determined by the strong and quick interactions that take place between its constituent particles.
What are the benefits of a solid state?In essence, it aids in our understanding of the molecule from the molecular to the crystallographic levels. Nonstoichiometric compounds are classified as an exclusive solid-state compounds in solid-state chemistry because of their structural and thermodynamic properties.
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Calculate the de Broglie wavelength of a 143- g baseball traveling at 80 mph .
The de Broglie wavelength of a 143- g baseball traveling at 80 mph is 1.092 × 10⁻³⁴ m.
What is de broglie wavelength ?The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.
Given that,
Mass of the baseball ( m ) = 143 g
= 0.143 kg
Velocity of the baseball ( v ) = 95 m/h
1 m/h = 0.447 m/s
Velocity of the baseball ( v )= 80 m/h
= 35.76 m/s
De-Broglie wavelength is given by :
H is Planck's constant
Thus, The de Broglie wavelength of a 143- g baseball traveling at 80 mph is 1.092 × 10⁻³⁴ m.
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what percent of glucose C6H12O2 is carbon?
Answer: 40.0%
Explanation: Thus the % composition of glucose by mass is carbon 40.0 % oxygen 53.3 % hydrogen 6.7 % In this way, the % composition by mass of any compound can be calculated provided that its formula is known.
Oxygen and chlorine gas are mixed in a container with partial pressures of 3040 mmHg
1.63 atm, respectively.
What is the TOTAL pressure inside the container in atm? *Don't forget to convert: 760mmHg
= latm*
Type your answer...
A mixture of oxygen and chlorine gas with a partial pressure of 3040 mmHg and 1.63 atm respectively will have a total pressure of 5.55 atm.
Partial pressure of gas mixturesAccording to Dalton's law of partial pressure, when a gas contains a mixture of gases, the total pressure of the gas mixture is the sum of the individual gas pressure.
This law can be mathematically expressed as:
P (total) = P ₁ + P ₂ + P ₃ + ......
Where P is the pressure of gas and 1, 2, 3, etc., represent the gases respectively.
In this case, the pressure of oxygen is 3040 mmHg. We first need to convert this to atm.
1 mmHg = 0.0013 atm
Thus, 3040 mmHG = 3040 x 0.0013
= 3.952 atm
The pressure of chlorine is 1.63 atm. Thus, the total pressure of the gas mixture would be:
P (total) = P oxygen + P chlorine
= 3.92 + 1.63
= 5.55 atm
In other words, the total pressure inside the container in atm would be 5.55 atm.
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draw the complete lewis diagrams showing all lone pairs for water and ammonia in an orientation that allows for a hydrogen bond. use a line to indicate the location of the hydrogen bond.
With 3 covalent connections to h and 1 lone pair, nitrogen has formed its whole octet, as seen by the Lewis dot picture.
What is the purpose of ammonia?How is nitrate used? Ammonia generated by industries is used as fertilizer in agriculture to the tune of 80%. Ammonia is also used to create polymers, explosives, textiles, pesticides, dyes, and other compounds in addition to its various applications. Additionally, it is utilized to clean water sources.
Do people require ammonia?It is also known as ammonia, aqueous ammonia, or ammonia solution when it is in this form. The majority of ammonia in water converts to ammonium ions, or nH4+. For plant, animal, and human life to exist, ammonia is a necessary component. It is a source that can be found in the air, soil, and water.
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dentify if the following molecule is a strong acid, strong base, weak acid or a weak base. Sodium hydroxide Weak base Strong base Weak acid Strong acid
Sodium hydroxide is classified as strong. strong base: In water, NaOH totally dissociates to produce Na+ and OH.
Because every accessible [OH] in NaOH is present in solution as [OH] and ready to take protons, it is regarded as a strong base.Because it entirely dissociates into sodium cation and hydroxide anion in aqueous solution, sodium hydroxide is a strong basic. One mole of sodium hydroxide will therefore include one mole of sodium cation and one mole of hydroxide anion since one formula unit of sodium hydroxide comprises one sodium cation and one hydroxide anion.Because it completely dissociates into hydroxide ions when placed in water, sodium hydroxide (NaOH) is a strong basic.For more information on strong base kindly visit to
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Which of the following is currently most often used to indicate the location of a signal on an IR spectrum?a. frequencyb. wavelengthc. wavelength and wavenumberd. wavenumber
Currently, the method utilised to identify a signal's position on an IR spectrum is called vibration excitation (increase vibration of the bonds or frequency).
The fingerprint area is the range of the infrared spectrum between 1200 and 700 cm-1. By measuring atom vibrations using IR spectroscopy, the functional groups of molecules can be identified.
What device might we employ to find IR?
A radiometer is a device used to find or quantify radiant energy. The phrase is specifically used in reference to instruments used to measure infrared radiation. There are several different types of radiometers, and each has a different measurement method.
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