The vapor pressure of ethanol, CH3CH2OH , at 40.0 °C is 17.88 kPa . If 2.02 g of ethanol is enclosed in a 3.00 L container, how much liquid will be present?
Answers
The amount of liquid ethanol present in the container is 2.02 g - 1.07 g = 0.95 g.
What is the ideal gas law?We can use the ideal gas law to determine the amount of liquid ethanol present in the container:
PV = nRT
where P is the vapor pressure of ethanol at the given temperature, V is the volume of the container, n is the number of moles of ethanol, R is the ideal gas constant, and T is the temperature in Kelvin.
First, we need to convert the given temperature of 40.0 °C to Kelvin:
T = 40.0 °C + 273.15 = 313.15 K
Next, we can rearrange the ideal gas law to solve for n:
n = PV/RT
We know the vapor pressure P is 17.88 kPa, the volume V is 3.00 L, the temperature T is 313.15 K, and R is 8.314 J/(mol*K). Therefore:
n = (17.88 kPa * 3.00 L) / (8.314 J/(mol*K) * 313.15 K)
n = 0.0233 mol
Finally, we can use the molar mass of ethanol (46.07 g/mol) to calculate the mass of ethanol present:
mass = n * molar mass
mass = 0.0233 mol * 46.07 g/mol
mass = 1.07 g
Therefore, the amount of liquid ethanol present in the container is 2.02 g - 1.07 g = 0.95 g.
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Related Questions
A mole(6.02214076×10^23) of blue whales(320,000 lbs) weighs how much more than the moon? (7.35 x 10^22 kg)
Answers
Then, subtract the mass of the moon from this number.
Answer:
Multiply the first 2 numbers on your calculator and convert it to kg by dividing by 2.205.
Then, subtract the mass of the moon from this number.
Explanation:
in which atom is the number of protons equal to the number of neutrons?
Answers
Answer:
neutral
Explanation:
is the sign of δs° obtained (question 3b) consistent with the expectations of dissolving a salt in water?
Answers
The obtained negative δs° sign in question 3b is consistent with the expected behavior of salt dissolution in water, which is an exothermic process releasing energy due to the hydration of ions by water molecules.
Yes, the sign of δs° obtained in question 3b is consistent with the expectations of dissolving a salt in water. When a salt dissolves in water, the process is exothermic, meaning it releases heat into the surrounding environment. This is because the salt ions are surrounded by water molecules, which form hydration shells around the ions and release energy as they do so. This release of energy results in a negative value for δs°, which is exactly what was obtained in question 3b. Therefore, the sign of δs° is consistent with the expected behavior of salt dissolution in water.
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complete combustion of 2.00 g2.00 g of a hydrocarbon produced 6.16 g6.16 g of co2co2 and 2.84 g2.84 g of h2o.h2o. what is the empirical formula for the hydrocarbon? insert subscripts as necessary. empirical formula:
Answers
The molecular formula of a compound is a whole number multiple of its empirical formula. The empirical formula of the hydrocarbon is C₄H₉.
What is empirical formula?The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.
Here moles of 'C' = moles 'CO₂' = 6.16 / 44 = 0.14 moles
Moles of 'H' = 2 × moles 'H₂O' = 2 × 2.84/18.02 = 0.315 moles
Divide both number of moles by 0.14. Then we get
1 mol 'C' and 2.25 mol 'H'
Multiply both with 4 to obtain a whole number.
Then the number of carbon is 4 and that of hydrogen is 9.
Thus the empirical formula is C₄H₉.
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What is the electron configuration of the chloride ion?
Answers
Answer:
La configuración electrónica del cloruro es 1s2 2s2 2p6 3s2 3p6.
Explanation:
What are the predominant intermolecular forces in: Kr, CBr4, NaF, CH3OH, and ruby? Then rank by increasing boiling point.
Answers
Answer:
Kr- dispersion forces
CBr4- dispersion forces
CH3OH - dispersion forces, dipole interaction, hydrogen bonding
NaF- ionic
Kr-<CBr4<CH3OH<NaF
Explanation:
The magnitude of intermolecular forces influences the boiling points of substances. The stronger the intermolecular forces the higher the boiling point.
The strongest intermolecular forces here is the Ionic bond hence it accounts for the highest boiling point followed by CH3OH having hydrogen bonding.
Though Krypton and CBr4 both have dipole interaction, the higher relative molecular mass of CBr4 makes it to have a higher boiling point than Kr
Jose completed an observational investigation to determine how many butterflies visited his garden each hour for one day Which option best explains why would Jose choose to complete an observational investigation?
He was able to count the number and type of butterflies that visited the garden,
He was observing the behavior of butterflies and could not control the variables
O He wanted to test how he could increase the number of butterflies visiting his garden
He was able to create a model of his garden showing the location of flowers and butterflies.
Answers
Answer:
He was able to count the number and type of butterflies that visited the garden,
Explanation:
Which phrase describes the molecular polarity and distribution of charge in a molecule of carbon dioxide, CO₂?
1. polar and symmetrical
2. polar and asymmetrical
3. nonpolar and symmetrical
4. nonpolar and asymmetrical
Answers
Use the concepts of energy and stability as they relate to
orbital filling to write the electron configuration for iron. (Look at image)
Answers
The orbital diagram shows us the number of electrons that can be found in the atom.
How do you fill up an orbital?We know that the orbital is a region in pace where there is a high probability of finding the electron. We also know that the filling of the electrons into the respective orbitals where they fall in can be done by the use of the Aufbau principle.
According to the Aufbau principle, it is clear that in the filling of the electrons into the orbitals, the orbitals that are lesser in energy are first filled. The orbitals that are lesser in energy are always found quite close to the nucleus.
This implies that the relative energies of the orbitals would tend to increase as we move away from the nucleus. In other words, the nucleus is the part of the atom that would be at the lowest energy. The orbital diagram of iron by the use of the Aufbau principle have been shown in the image attached to this answer.
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Regina has avoided working on her term paper all semester, and now she has only one week to write it. She identifies her goal and hastily writes it down: I will make an A on my English literature term paper that is due next week. Then, she starts breaking her goal into specific daily tasks. Where is the flaw in Regina’s plan?
She hasn’t broken her big goal into small enough pieces.
Her time frame is not realistic.
Her goal is not specific enough.
She has not written her goal enough times.
Answers
The flaw in Regina’s plan is that the time frame is unrealistic (option B).
What is goal setting?Goal setting involves the development of an action plan designed in order to motivate and guide a person or group toward a goal, which is a result that one is attempting to achieve.
Effective goal setting lets you measure progress, overcome procrastination and visualize your dreams. However, setting goals is said to be effective when it is done in an adequate time frame.
According to this question, Regina identifies her goal and hastily writes it down as follows: I will make an A on my English literature term paper that is due next week.
This goal, although is great, is unlikely to be met because of the time frame. One cannot get an excellent result in something that lacks adequate preparation, which includes adequate time.
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3 samples have 35g of sugar 1 sample has 40g of sugar 1 sample has 50g of sugar Calculate the average amount of sugar:____g
Answers
Answer:
195
Explanation:
The answer is 195 because you multiply 35 three times then add 40 and 50
Answer:
Answer:
195
Explanation:
The answer is 195 because you multiply 35 three
Explanation:
If 100.0g of nitrogen is reacted with 100.0g of hydrogen, what is the excess reactant? What is the limiting reactant? Show your work.
If someone could just help me understand how to do this, it would be much appreciated. (:
Answers
N₂ : limiting reactant
H₂ : excess reactant
Further explanationGiven
mass of N₂ = 100 g
mass of H₂ = 100 g
Required
Limiting reactant
Excess reactant
Solution
Reaction
N₂+3H₂⇒2NH₃
mol N₂(MW=28 g/mol) :
\(\tt mol=\dfrac{mass}{MW}=\dfrac{100}{28}=3.571\)
mol H₂(MW= 2 g/mol) :
\(\tt mol=\dfrac{100}{2}=50\)
A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients, and small or exhausted reactans become a limiting reactants
From the equation, mol ratio N₂ : H₂ = 1 : 3, so :
\(\tt \dfrac{3.571}{1}\div \dfrac{50}{3}=3.571\div 16.6\)
N₂ becomes a limiting reactant (smaller ratio) and H₂ is the excess reactant
how many grams of sodium chloride will you add to 250.ml of water to make a 0.746 m solution? answer to 2 decimals.
Answers
To make a 0.746 M solution in 250 ml of water, approximately 10.89 grams of sodium chloride should be added. This calculation is based on the molarity of the solution and the volume of the solution.
Given:
Molarity (M) = 0.746 M
Volume of solution = 250 ml = 0.25 L
Molarity = moles of solute / volume of solution (in liters)
We need to rearrange the formula to solve for moles of solute:
moles of solute = Molarity × volume of solution (in liters)
moles of solute = 0.746 M × 0.25 L
moles of solute = 0.1865 moles
Now, we can calculate the mass of sodium chloride using its molar mass:
Mass of sodium chloride = moles of solute × molar mass of sodium chloride
From the periodic table, the molar mass of sodium chloride (NaCl) is 58.44 g/mol.
Mass of sodium chloride = 0.1865 moles × 58.44 g/mol
Mass of sodium chloride ≈ 10.89 grams (rounded to 2 decimal places)
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Which statements reflect the process of electrolysis? Check all that apply. Water is formed from ions of hydrogen and oxygen. The electrical reactions in a rechargeable battery can be reversed. The cathode becomes the electrode for reduction. The cathode takes on the metal deposits or layers. Decomposition of ores produces separated elements. Decomposition of ores produces low energy products.
Answers
Answer:
Decomposition of ores produces separated element.
Answer: it’s b, d, and e
Explanation: i just did it, hope this helps :)
Which of these statements relating to ecological succession is true?
During succession, there is no change to the physical or chemical environment.
During succession, existing species resist interaction with new species.
During succession, new species move into an area and colonize it.
Most ecological successions occur over 10 to 15 years.
Answers
Answer: During succession, new species move into an area and colonize it.
Explanation: Ecological succession refers to the process of change in the composition and structure of an ecosystem over time. It occurs due to the interactions between the biotic (living) and abiotic (non-living) components of an environment. As succession progresses, new species gradually establish and thrive in the area, leading to a change in the species composition. This process can occur over a long period of time, ranging from decades to centuries, depending on various factors such as environmental conditions and the specific type of succession.
Question 6
900 mL of water is added to 100 mL of a 0.1 M solution. What is the new concentration?
0.1M
0.0001M
0.001M
0.01M
Answers
Answer:
A. is the correct point.
Explanation:
This is true because no matter how many mL of water is added, the solution only gets more height; the concentration in everything else stays the same, and water doesn't have any concentration. Very confusing, I know. Good luck!
what type of molecule controls the cell cycle checkpoints?
Answers
The type of molecule that controls the cell cycle checkpoints are cyclin proteins.
Two corporations of proteins, known as cyclins and cyclin-structured kinases (Cdks), are answerable for the development of the cell through the diverse checkpoints. The stages of the 4 cyclin proteins range during the cell cycle in a predictable pattern. The vital machines that pressure cell cycle development are the cyclin-structured kinases (CDKs). These are serine/threonine protein kinases that phosphorylate key substrates to sell DNA synthesis and mitotic development. The vital additives of the cell cycle manage device are cyclin-structured protein kinases (Cdks), whose hobby relies upon on affiliation with regulatory subunits known as cyclins.
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Which of the following best represents Boyle's Law?A) The pressure of a gas exerted on the walls of its container is directly proportional to the volume of the gas when the temperature of the gas remains constant.B) The volume of a gas inside a container is inversely proportional to the temperature of the gas when the pressure of the gas remains constant.C) The volume of a gas inside a container is directly proportional to the temperature of the gas when the pressure of the gas remains constant.D) The pressure of a gas exerted on the walls of its container is directly proportional to the temperature of the gas when the volume of the gas remains constant.E) The pressure of a gas exerted on the walls of its container is inversely proportional to the temperature of the gas when the volume of the gas remains constant.F)The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.
Answers
Answer
F) The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.
Explanation
Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases. He discovered that doubling the pressure of an enclosed sample of gas, while keeping its temperature constant, caused the volume of the gas to be reduced by half.
Hexachlorobenzene is contaminating your local well water. The concentration in the ground water is 3.4 mg/L. The soil organic content is 0.3% and pore water occupies 55% of aquifer volume. Estimate carbon-normalized sorption coefficient, sorption coefficient and mass of organic contaminant per mass of sorbent.
Answers
To estimate the carbon-normalized sorption coefficient, sorption coefficient, and mass of organic contaminant per mass of sorbent, we need additional information such as the organic carbon partition coefficient (Koc) and the bulk density of the soil.
Carbon-Normalized Sorption Coefficient (Koc):
The carbon-normalized sorption coefficient represents the sorption capacity of the sorbent material for the organic contaminant. It is calculated by dividing the sorption coefficient (Kd) by the organic carbon content in the soil.
Koc = Kd / % organic carbon
Sorption Coefficient (Kd):
The sorption coefficient represents the ratio of the concentration of the contaminant adsorbed onto the sorbent material to the concentration in the aqueous phase.
Kd = (mass of contaminant sorbed / mass of sorbent) / (concentration of contaminant in water)
Mass of Organic Contaminant per Mass of Sorbent:
To calculate the mass of organic contaminant per mass of sorbent, we need to know the mass of the contaminant adsorbed onto the sorbent material and the mass of the sorbent itself.
Mass of organic contaminant per mass of sorbent = mass of contaminant sorbed / mass of sorbent
To perform these calculations, we need the organic carbon partition coefficient (Koc) and the bulk density of the soil. With this information, we can estimate the sorption characteristics of hexachlorobenzene in the given scenario.
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A(g) + B(g) = C(g) + D(g)
18. For which of the following equilibrium constants will reactions of the general type shown above
give the greatest yield of products C+D when equilibrium is attained ?
(A) K= 1 x 10^-15
(B) K= 1 x 10-²
(C) K= 1 x 10²
(D) K= 1 x 10^50
Answers
Comparing the given equilibrium constants, we find that K values increase from (A) to (D): 1 x 10^-15 < 1 x 10^-2 < 1 x 10^2 < 1 x 10^50.
Since a higher K value signifies a greater yield of products, the greatest yield of products C and D will be obtained when the equilibrium constant is the highest. the answer is (D) K = 1 x 10^50.
option d
The equilibrium constant (K) is a measure of the extent of a chemical reaction at equilibrium. It is defined as the ratio of the concentrations (or partial pressures) of the products to the concentrations (or partial pressures) of the reactants, each raised to the power of their respective stoichiometric coefficients.
In the given reaction A(g) + B(g) = C(g) + D(g), a higher equilibrium constant (K) indicates a greater yield of products C and D at equilibrium. This means that the reaction is more favorable in the forward direction, leading to a higher concentration of C and D compared to A and B.
A high equilibrium constant indicates that the reaction strongly favors the formation of products C and D and will shift towards the products' side at equilibrium. In this case, the forward reaction is highly favored, resulting in a significant yield of products C and D.
option d
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How would you respond to a friend’s claim that chemists don’t know what to expect when synthesizing new materials?
Answers
Answer: Scientist would experiment the unknown giving new results and that are unheard of by other people.
Explanation:
It is not true that chemists don't know about what to expect in a of a new material because well planned chemist will definitely study all aspect of the research work to synthesis a new material.
What is a chemical synthesis?A chemical synthesis is synthesizing a chemical compound having certain applications through a scientific way.
When synthesizing a new material the researcher should know about the properties that might be shown by the new material and the experiment should be well designed in way that result in good yield.
A chemist must know about these facts and the they must account for the materials needed for the synthesis and they know how to conduct and in which way it gives the result.
Hence, the claim cannot be supported.
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Rank these compounds by their expected boiling point. Highest boiling point Lowest boiling point 1.CH3OH 2. CH4 3. CH3Cl
Answers
The expected boiling point ranking of the given compounds is in the order of highest to lowest will be:
• CH3OH
• CH3Cl
• CH4
The boiling point of a compound is influenced by factors such as the strength of intermolecular forces, molecular weight, and branching. Based on these factors, we can rank the given compounds by their expected boiling point:
• CH3OH (methanol) - Methanol has the highest boiling point among the given compounds due to its ability to form strong hydrogen bonds between its molecules. Hydrogen bonding is a strong intermolecular force that requires a significant amount of energy to break, which results in a higher boiling point.
• CH3Cl (chloromethane) - Chloromethane has a lower boiling point than methanol because it only has dipole-dipole interactions and van der Waals forces between its molecules. These intermolecular forces are weaker than hydrogen bonding, so less energy is required to overcome them, resulting in a lower boiling point.
• CH4 (methane) - Methane has the lowest boiling point among the given compounds because it is nonpolar and only has weak van der Waals forces between its molecules. These intermolecular forces are the weakest, requiring the least amount of energy to overcome, which results in the lowest boiling point.
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The ranking of these compounds by boiling point is:
1. CH3OH (Methanol)
2. CH3Cl (Chloromethane)
3. CH4 (Methane)
1. CH3OH (Methanol) - Boiling Point: 65°C
Methanol (CH3OH) is a colorless and flammable liquid that is the simplest alcohol, with a molecular formula of CH3OH. It is used in antifreeze, as a solvent, and as a fuel. It has a boiling point of 65.0 °C.
2. CH3Cl (Chloromethane) - Boiling Point: -24.3°C
Chloromethane (CH3Cl) is a colorless, flammable gas with a sweet odor. It is used as a solvent and a refrigerant, and has a molecular formula of CH3Cl. It has a boiling point of -24.2 °C.
3.CH4 (Methane) - Boiling Point: -161.5°C
Methane (CH4) is a colorless and odorless gas that is the main component of natural gas. It has the chemical formula CH4 and is the simplest hydrocarbon. It is used as a fuel for heating and cooking, and has a boiling point of -164.0 °C.
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When a strip of Zn is placed in a beaker containing 0. 1 M HCl, H2(g) evolves. If a strip of Al is placed in a beaker containing 0. 1 M HCl, does H2(g) evolve?
A. Yes; Al is reduced and H+(aq) is oxidized.
B. Yes; Al is oxidized and H+(aq) is reduced.
C. No; Al is reduced and Cl-(aq) is oxidized
D. No; Al is oxidized and H2O(l) is produced
Answers
The correct option is B, This is because aluminum is more reactive than hydrogen, so it will displace hydrogen from hydrochloric acid.
2Al(s) + 6HCl(aq) → \(2AlCl_3\)(aq) + \(3H_2\)(g)
Hydrochloric acid (HCl) is a strong, highly corrosive acid found naturally in the human stomach. In biology, it plays an essential role in the digestion of food by breaking down proteins and aiding in the absorption of nutrients. HCl is produced by the parietal cells in the stomach lining and is secreted into the stomach during the digestion process.
The acidic environment created by HCl in the stomach also helps to kill harmful microorganisms that may be present in food. Additionally, HCl stimulates the release of enzymes and hormones that further aid in digestion. While HCl is critical for digestion, too much or too little can lead to health problems. Excessive HCl production can cause acid reflux and stomach ulcers, while inadequate HCl production can result in the malabsorption of nutrients and an increased risk of infections.
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How can you find the amount of valence electrons an atom of an element contains?
Answers
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
Explanation:
Describe what occurs when a metal is placed into an acid and the equation and what is occurring within it
Answers
When a metal is placed into an acid, a chemical reaction called a redox reaction occurs. In this process, the metal loses electrons (oxidation) and the acid gains electrons (reduction). This results in the formation of a salt and hydrogen gas is released. The general equation for this reaction is:
Metal + Acid → Salt + Hydrogen gas
For example, when zinc is placed into hydrochloric acid, the reaction is:
Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
In this reaction, zinc is oxidized to form zinc chloride (ZnCl₂) while hydrogen ions (H⁺) in the hydrochloric acid are reduced to form hydrogen gas (H₂).
The release of hydrogen gas can be observed as bubbles forming in the solution. This process demonstrates the reactivity of metals with acids, which depends on the metal's position in the reactivity series.
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the yeastengages in photosynthesis, which produces oxygen gas, bio, quizletquizlet
Answers
The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.
What is photosynthesis?Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.
Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.
However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.
It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.
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What is the concentration of a saturated AgC2H3O2 solution? (Ksp=1.94x10^-3)
Answers
The concentration of a saturated \(AgC_2H_3O_2\) solution is 0.044 M.
The equilibrium expression for the dissociation of \(AgC_2H_3O_2\) is:
\(AgC_2H_3O_2\)(s) ⇌ Ag+(aq) + \(C_2H_3O_2\)-(aq)
We can assume that the concentration of Ag+ is equal to the solubility of \(AgC_2H_3O_2\). At equilibrium, the dissolution rate equals the precipitation rate, and the solution is said to be saturated. Therefore, we can use the Ksp value to calculate the concentration of Ag+ ions in a saturated solution of \(AgC_2H_3O_2\)
The Ksp expression for the above equilibrium is:
Ksp = [Ag+][\(C_2H_3O_2\)-]
At saturation, the concentration of Ag+ and \(C_2H_3O_2\)- ions in solution will be equal. Let x be the concentration of Ag+ and \(C_2H_3O_2\)- ions in solution.
Therefore, we can write:
Ksp = x^2
Substituting the value of Ksp, we get:
1.94 x 10^-3 = x^2
Taking the square root on both sides, we get:
x = 0.044 M
Therefore, the concentration of a saturated \(AgC_2H_3O_2\) solution is 0.044 M.
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Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 7.30 moles of magnesium perchlorate, Mg(CLO4)2
Pls helppp
Will mark brainliest
No links pls
Answers
Answer:
152
Explanation:
what is the empirical formula of stannous fluoride, the first fluoride compound added to toothpaste to protect teeth against decay? its mass percent composition is 24.25% ff , 75.75% snsn .
Answers
The empirical formula for stannous fluoride, a substance added to toothpaste to prevent tooth decay, is SnF2, if its mass percentage composition is 24. 25% F, 75.
Sn 75.75 119/75.75m= 1\s F 24.25 19/24.25 = 2
SnF2 is the resultant compound.
Thus, the information provided is accurate.
You must first determine the mass percentage of the elements in the compound for any empirical formula problem.
Change the% to grammes after that.
Next, split each mass by its associated molar mass.
Divide all numbers by the moles response that is the least.
The chemical compound known as stannous fluoride, sometimes known as tin(II) fluoride (from the Latin stannum, "tin"), has the formula SnF2. It is a colourless solid that is utilised as a toothpaste ingredient.
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name the native mineral that is the best conductor of electricity. what is the one disadvantiage of this precious metal
Answers
Silver is the best conductor of electricity. Its main disadvantage is that it tarnishes when exposed to air. the native mineral that is the best conductor of electricity.
The Latin argentum and Sanskrit argunas, both meaning "bright," are where the word "Ag" originates. Even in the Stone Age, silver was used. Silver use dates back at least 5000 years, according to archaeological findings. When aesthetics is crucial, it is utilised for silver dinnerware and jewellery. As the greatest known visible light reflector, silver is utilised to build mirrors, even though it tarnishes with time. Electrical connections, batteries, solder and brazing alloys, dental alloys, and other products also use it.
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