If the final pressure in a container is 6. 10 atm and the volume changes from 2. 5 L to 3. 7 L, what is the original pressure?
Your answer:
9. 028 atm
1. 51 atm
0. 66 atm
4. 12 atm
Answers
The original pressure in the container was 9.028 atm.
To solve this problem, we need to use the combined gas law equation, which relates the pressure, volume, and temperature of a gas. The equation is P1V1/T1 = P2V2/T2, where P1 and V1 are the initial pressure and volume, respectively, and P2 and V2 are the final pressure and volume, respectively.
We are not given the temperature, so we can assume that it is constant.
First, we can rearrange the equation to solve for P1:
P1 = (P2V2/T2) * T1/V1
Substituting the given values, we get:
P1 = (6.10 atm * 3.7 L) / (2.5 L * T2) * T1
Since the temperature is constant, we can cancel it out, and the equation becomes:
P1 = (6.10 atm * 3.7 L) / (2.5 L)
Simplifying, we get:
P1 = 9.028 atm
Therefore, the original pressure in the container was 9.028 atm.
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Related Questions
The number of Atoms present in one mole of an element is equal to Avogadro Number. Which One Of the Following contains the greatest number of Atoms? (1)4g He (2)46g Na (3)0.40g Ca (4) 12g He
Answers
Answer:
Thus, the element containing the greatest number of atoms is 12 g He. Thus, the correct option is (4) 12 g He. Note: The number of atoms of a compound is Avogadro's number for 1 mole of compound. The number 6.022×1023 is known as Avogadro's number.
Explanation:
(4)✔️ 12 g He
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Consider the following half-reaction balanced for an acidic solution: 2H2O + SeO2 → SeO42- + 4H+ + 2e-. What is the balanced half-reaction for a basic solution?
Answers
Answer
\(SeO_2+4OH^-\rightarrow SeO^{2-}_4+2H_2O+2e^-\)Explanation
The given balanced half-reaction for an acidic solution:
\(2H_2O+SeO_2\rightarrow SeO^{2-}_4+4H^++2e^-\)What to find:
Tha balanced half-reaction for a basic solution.
Step-by-step-solution:
To balance the half-reaction for a basic solution;
1. Add OH⁻ ions to BOTH SIDES to neutralize any H⁺
\(2H_2O+SeO_2+4OH^-\rightarrow SeO^{2-}_4+4H^++4OH^-+2e^-\)2. Combine H+ and OH- to make H2O.
\(2H_2O+SeO_2+4OH^-\rightarrow SeO^{2-}_4+4H_2O+2e^-\)3. Simplify by canceling out excess H2O
\(SeO_2+4OH^-\rightarrow SeO^{2-}_4+2H_2O+2e^-\)4. Balance the charges by adding e-
\(SeO_2+4OH^-\rightarrow SeO^{2-}_4+2H_2O+2e^-\)Strontium-89 undergoes beta decay, after 88 days a sample has decreased to 30% its original size. What is the half-life of sr-89?.
Answers
The half-life of sr-89 will be 51 days.
What is a Beta decay?In nuclear physics, beta decay is a type of radioactive decay in which an atomic nucleus emits a beta particle (a fast energetic electron or positron), which changes the original nuclide into an isobar of that nuclide. Prior to beta decay, neither the beta particle nor the associated (anti-)neutrino is present in the nucleus; instead, they are produced during the decay process. This procedure gives unstable atoms a protons-to-neutrons ratio that is more stable.The weak force, which is characterized by relatively slow decay durations, results in beta decay. Up and down quarks make up nucleons, and the weak force allows a quark to change the flavor of its lepton by emitting a W boson, which produces an electron/antineutrino or positron/neutrino pair.For instance, the disintegration of a neutron, which consists of two down quarks and an up quark, produces a proton, which consists of a down quark and two up quarks.Because the fundamental nuclear mechanism, mediated by the weak force, is the same, electron capture is occasionally considered a kind of beta decay. In electron capture, a proton in the nucleus captures an inner atomic electron, turning it into a neutron, and releasing an electron neutrino.To learn more about beta decay strontium-89 click here-
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Which is not a physical state of matter?
A. Solid
B. Liquid
C. Plasma
D. Gas
Answers
Answer: Plasma
Explanation:
Answer: Plasma
Explanation:
In an experiment, sulfuric acid reacted with different volumes of sodium thiosulfate in water. A yellow precipitate was formed during the reaction. A cross drawn at the base of each flask became gradually invisible due to the formation of this yellow precipitate. The time taken for the cross to become invisible was recorded. A partial record of the experiment is shown.
Experimental Record
Flask Volume of H2SO4 Volume of Sodium Thiosulfate Volume of Water Time
1 5 mL 50 mL 0 mL 19 seconds
2 5 mL 40 mL 10 mL
3 5 mL 30 mL 20 mL
4 5 mL 20 mL 30 mL
Based on factors that affect the rates of chemical reactions, which of the following would describe the trend expected in the table?
Answers
Based on factors that affect the rates of chemical reactions, the trend expected in the table is that as the volume of sodium thiosulfate in water increases, 1) 5 mL 50 mL 0 mL 19 seconds
what is sodium thiosulfate ?
Sodium thiosulfate (Na2S2O3) is a salt composed of sodium, sulfur, and oxygen atoms. It is a colorless, crystalline solid that dissolves in water and has a variety of uses in different fields.
One of the most common uses of sodium thiosulfate is as a photographic fixer, where it is used to remove unexposed silver halide from photographic films and papers. It is also used as a neutralizing agent for chlorine and other oxidizing agents in water treatment, as a dechlorinating agent in the treatment of wastewater, and as a reagent in the laboratory for different chemical reactions.
Based on factors that affect the rates of chemical reactions, the trend expected in the table is that as the volume of sodium thiosulfate in water increases (
As the concentration of sodium thiosulfate increases, the frequency of effective collisions between the reactant molecules and the likelihood of successful collisions increases, resulting in a faster reaction rate. Therefore,
Flask 1 -- 1) 5 mL 50 mL 0 mL 19 seconds(with the highest concentration of sodium thiosulfate) should have the shortest time taken for the cross to become invisible, and
Flask 4 -- 4) 5 mL 20 mL 30 mL(with the lowest concentration of sodium thiosulfate) should have the longest time taken for the cross to become invisible.
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What do the craters on the moon’s surface tell us about its past?
There may be alien life on the moon.
The moon’s surface has been struck with other objects.
There are volcanoes on the moon.
Mountains formed on the moon.
Answers
Answer:
The moon's surface has been struck with other objects.
Explanation:
Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.
Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.
Answer 3 - Volcanos form mountains and magma tubes, not craters.
Answer 4 - The formation of mountains does not relate to craters in any meaningful way.
Answer: The moon’s surface has been struck with other objects.
Explanation: because those crates were caused by drifting objects such as asteroid's and meteorite's that caused craters in the moon.
the answer is D
Which of the following conversion factors is correct to convert 0.25 moles of Na to particles of Na?
Answers
Answer:
6.02×10²³ particles / 1 mol
Explanation:
In this question the choices are missed.
For determine the particles of Na, in 0.25 moles we should know that the mole referrs to the Avogadro's number.
1 mol of anything contains 6.02×10²³ entities, that's why we should apply this conversion factor to find the final answer:
0.25 mol . 6.02×10²³ particles / 1 mol = 1.50×10²³ particles
In conclussion: 1.50×10²³ particles of Na are contained in 0.25 moles of Na
brands in the united states remain aggressive with their event sponsorship during the current covid pandemic. 回答選擇群組 true false
Answers
False. During the current COVID-19 outbreak, brands in the United States have largely reduced or altered their event sponsorships.
What happened during the COVID-19 outbreak?The respiratory symptoms that COVID-19 most frequently produces can resemble those of a cold, the flu, or pneumonia. More than just your lungs and respiratory system could be affected by COVID-19. The condition may also affect other areas of your body. The majority of COVID-19 sufferers have minor symptoms, while a small number develop serious illness.
The majority of virus-infected individuals will experience mild to severe respiratory disease and will recover without the need for special care.
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Copper metal (Cu) reacts with silver nitrate (AgNO3) in aqueous solution to form Ag and Cu(NO3)2. An excess of AgNO3 is present. The balanced chemical equation is shown below.
Cu + 2AgNO3 Right arrow. Cu(NO3)2 + 2Ag
The molar mass of Cu is 63.5 g/mol. The molar mass of Ag is 107.9 g/mol. What mass, in grams, of Ag is produced from reaction of 31.75 g of Cu?
26.95
107.9
215.91
431.82
Answers
Answer:
107.9g
Explanation:
Given parameters:
Molar mass of Cu = 63.5g/mol
Molar mass of Ag = 107.9g/mol
Mass of reacting Cu = 31.75g
Unknown:
Mass of Ag produced = ?
Solution:
The reaction equation is given as;
Cu + 2AgNO₃ → Cu(NO₃)₂ + 2Ag
The equation is balanced.
We start by find the number of moles of the known;
Number of moles = \(\frac{mass}{molar mass}\)
Number of moles of Cu = \(\frac{31.75}{63.5}\) = 0.5moles
From the balanced equation;
1 mole of Cu produced 2 moles of Ag;
0.5 mole of cu will produce 0.5 x 2 mole of Ag = 1 mole of Ag
Now;
Mass of Ag = number of moles x molar mass
Mass of Ag = 1 mole of Ag x 107.9g/mol = 107.9g
Answer:
107.9
Explanation:
Although CaCO3 has a relatively small solubility product, it is quite soluble in the presence of ?
Answers
Calcium carbonate (CaCO₃) is quite soluble in the presence of acidic solutions inspite of having small solubility product .
Step-by-step explanation:
1. Solubility product: This is the equilibrium constant for a solid substance dissolving in an aqueous solution. It represents the concentration of the dissolved ions when the solution is at equilibrium.
2. Calcium carbonate (CaCO₃): This is a common compound found in rocks, shells, and many other natural sources. It is sparingly soluble in water, which means only a small amount dissolves to form a saturated solution.
3. A substance is considered soluble if it can dissolve in a solvent, such as water, to form a homogeneous mixture called a solution.
Acidic solutions: Calcium carbonate is more soluble in acidic solutions because the acid reacts with the CaCO₃, forming soluble calcium ions (Ca²⁺) and an acidic anion (e.g., CO₂ and H₂O when reacting with a strong acid like HCl). This reaction increases the solubility of calcium carbonate by removing it from the equilibrium, allowing more CaCO₃ to dissolve in the solution.
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(4 marks)
A farmer distributed his cabbages as follows: A certain hospital received a quarter of the
total number of bags. A nearby school received half of the remainder. A green grocer
received a third of what the school received. What remained were six bags more than
what the green grocer received. How many bags of cabbages did the farmer have?
(3
Answers
Answer:
Explanation:
Let the farmer had n no of bags of cabbage .
given to hospital = n / 4
given to school = 1/2 x 3n /4
= 3n / 8
given to grocer = 1 / 3 x (3n / 8 )
= n / 8
No of bags distributed
= n / 4 + 3n / 8 + n / 8
= 6n / 8
Remaining bag
= n - 6n / 8
= 2n / 8
According to question
2n / 8 = 6 + n / 8
n / 8 = 6
n = 48 .
Summary of exothermic and endothermic
Please help with the chart 10 questions
1. Which type of energy is representing by the moving of objects?
2. What type of energy is stored?
3. Explain the lot of conversation of energy?
4. A metal spoon and a wooden spoon are placed in a pot of boiling water. What property of the metal spoon causes it to become hotter than the wooden spoon and why?
5. The thing we measure when we want to determine the average kinetic energy of random motion is the particles of a substance is ___________.
6. The __________ is the energy needed to raise the temperature of a substance by 1°C.
7. A(n) ________ reaction is one where the products have lower energy than the reactants.
8. __________ reaction requires energy in order to take place.
9. The __________ is used to describe how much energy is produced or used during a chemical change.
Answers
An illustration of a 500 ml beaker with liquid filled up to 300 ml. why are the marked lines on a beaker like this useful for measuring the volume of a liquid? a liquid maintains its shape in the beaker, so the beaker can measure the liquid’s height, and the height cubed equals the liquid’s volume. a liquid conforms to the circular area of the beaker, and this area multiplied by the liquid’s height equals its volume. a liquid is usually made of neutral atoms, and the beaker does not add or remove energy from the atoms, thereby preventing ionization. a liquid is compressible, but since the beaker does not have a top on it, the liquid will maintain its same volume.
Answers
The marked lines on a beaker allow you to measure the height of a liquid, and by multiplying the height by the circular area of the beaker, you can determine the volume of the liquid. This method relies on the assumption that the liquid maintains its shape in the beaker and fills the circular area of the beaker.
The marked lines on a beaker are useful for measuring the volume of a liquid because they indicate specific measurements. Here's how it works:
1. A liquid maintains its shape in the beaker, so the beaker can measure the liquid's height. This means that the level of the liquid in the beaker corresponds to its volume.
2. The height of the liquid can be measured by looking at the marked lines on the side of the beaker. Each line represents a specific volume measurement, such as 100 ml or 200 ml. By observing which line the liquid reaches, you can determine the approximate volume of the liquid in the beaker.
3. However, it's important to note that the height of the liquid alone does not equal its volume. Instead, the volume is determined by multiplying the liquid's height by the circular area of the beaker.
4. The circular area of the beaker is the area of the base of the beaker, which is a circle. This area can be calculated using the formula A = πr^2, where A represents the area and r represents the radius of the base.
5. By multiplying the liquid's height by the circular area of the beaker, you can calculate the volume of the liquid. This is because the volume of a cylinder (such as a beaker) is equal to the height multiplied by the base area.
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5 of 7 What percentage of a material will persist after 80 minutes if it's half life is 20 minutes?
Answers
Answer:
50
Explanation:
Hey guys! How is the answer C? I need steps plz
Answers
How many moles of methane are produced when 25. 1 moles of carbon dioxide gas react with excess hydrogen gas.
Answers
Answer:
25.1 moles
Hence it can be seen that when 25.1 moles of carbon dioxide gas react with excess hydrogen gas, 25.1 moles of methane gas are produced.
In which of these solutions will the weak acid, HCN, ionize less than it does in pure water?A- 0.20 M NaNO3B- 0.20 M KClC- 0.20 M KOHD- 0.20 M NaCN
Answers
The common ion effect is the suppression of ionisation of a weak electrolyte in the absence of a powerful electrolyte. Ionization in solutions is lower than in pure water.
What substances make up buffer solution?A strong acid as well as the negative ion of both the hydrochloric base, or even a reduced form and the carboxyl group of the weak base, are combined to form the buffer solution, a water-based solvent solution. They withstand being diluted or having modest amounts of acid or alkali added to them without changing their pH.
Are Hydrochloric and NaCl a pair of buffers?The chloride anion produced by sodium chloride serves as the hydrochloric acid's (HCl) cucl2 (NaCl). Due to the fact that we are mixing a potent acid with its incredibly weak conjugate base, this will not result in a buffer solution.
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Which of the definitions below is best for the word molecule? Atoms of different elements chemically joined together More than one atom chemically joined together A type of compound More than one atom of the same type chemically joined together A group of atoms together
Answers
Answer: More than one atom of the same type chemically joined together
Explanation:
An atom is the smallest unit of any matter which may or may not have independent existence. Example: Argon (Ar) is an element which exist as Ar atom only.
Molecule is the smallest unit of any matter which always have independent existence. For example: Hydrogen (H) is an element which can exist in nature as \(H_2\) molecule only.
Atoms of different elements chemically joined together is called as a compound. Example: \(H_2O\) is a compound formed by chemical combination of hydrogen (H) and oxygen (O) atom.
how many atoms are contained in 0.35 mol of iron?
Answers
There are 2.11 x 10²³ atoms contained in 0.35 mol of iron.
Avogadro's number (6.02 x 10²³) represents the number of particles in one mole of a substance. To find the number of atoms in 0.35 mol of iron, we can multiply the Avogadro's number by the number of moles:
0.35 mol x 6.02 x 10²³ atoms/mol = 2.11 x 10²³ atoms
Therefore, there are 2.11 x 10²³ atoms contained in 0.35 mol of iron. This calculation works for any substance, as long as we know the molar mass of the substance.
In this case, the molar mass of iron is 55.85 g/mol, which means that 1 mole of iron contains 6.02 x 10²³ atoms with a total mass of 55.85 grams. By using this conversion factor, we can convert from moles of iron to the number of atoms of iron.
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25,000 cg is equal to ___g. (Only input whole number answer.
Answers
Answer:
\(250g\)Explanation:
Here, we want to convert 25,000 cg to g
Mathematically:
\(1\text{ cg = 0.01 g}\)Thus, we have it that:
\(\begin{gathered} 25000\text{ cg will be:} \\ 25000\times\text{ 0.01 = 250 g} \end{gathered}\)PLEASE HELP ME GUYS!! I NEED THE CORRECT ANSWER! IF YOU ARE NOT SURE, PLEASE LET SOMEONE ELSE ANSWER! IT'S ONLY FIVE POINTS!
Question: What information can the atomic emission spectra of a distant star yield for scientists?
A. chemical composition of the star
B. age of the star
C. number of electrons in the star
D. distance to the star
Answers
Answer:
A. Chemical composition of the star
Explanation:
'Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths' - astronomy.com
'Atomic emission spectra are unique spectra of light emitted by an element when electricity is run through it or when it is viewed through a prism. Because they are unique, they can act as an element s fingerprint' - brightstorm.com
Answer:
The science of spectroscopy is quite sophisticated. From spectral lines astronomers can determine not only the element, but the temperature and density of that element in the star. The spectral line also can tell us about any magnetic field of the star. The width of the line can tell us how fast the material is moving.
What is the best use of probability in genetics?
A. To calculate the possible blood types of offspring
B. To exactly predict the the traits each offspring will have
C. To better parents' chances of having female or male offspring
D. To determine how many offspring parents will have
Answers
Answer: B
Explanation: Genetics has to do with genes, which is appearance, which is hereditary from the parent :)
I NEED AN ANSWER ASAP! THIS IS DUE TOMARROW! at room temperature and standard pressure nitrogen is a gas and water is a liquid explain how the interactions between molecules cause a difference in the state of nitrogen and water
Answers
Nitrogen exists as a diatomic molecule, N2 (subscript 2). It exists as a gas at room temperature because of the type of interactions with other identical molecules: weak intermolecular forces are present between the molecules, specifically temporary dipole-dipole interactions.
These interactions are the second weakest type of intermolecular force (Van Der Waals and Hydrogen Bonds are the other two with Hydrogen Bonds being stronger).
Now the reason why Nitrogen exists as a gas is because these weak intermolecular forces can be overcome with little energy. Therefore, at room temperature, Nitrogen exists as a gas.
Now if we wanted to get liquid Nitrogen (quite common in Science demonstrations) we would have to cool Nitrogen down to -195.8°C (77.35°K). The energy of the particles would decrease so much that the dipole-dipole interactions would be strong enough to hold the molecules of Nitrogen together in a liquid state.
Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule. Intermolecular forces of attraction decides the states of a matter.
What is intermolecular forces of attraction?Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.
Intermolecular forces of attraction play an important role in deciding the states of a matter. Nitrogen is a gas because its molecule have vanderwaal force of attraction. Water is a liquid because its molecule have hydrogen bonding.
Therefore, intermolecular forces of attraction decides the states of a matter.
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4. What is free energy?
Answers
Answer:
A thermodynamic quantity equivalent to the capacity of a system to do work.
Explanation:
Is oil a reasonable energy source? Why or why not?
Answers
Answer:
No, it is not.
Explanation:
Oil is a non-renewable source of energy. ... Burning oil can pollute the air. Much of our oil has to be imported and it is becoming more and more expensive as reserves reduce and imports increase. Producing electricity from crude oil is expensive compared to other fossil fuels such as coal or gas.
*You Can put this in your own words
Please help if you know
Answers
Blue and red litmus paper (they’re natural indicators by the way, you can use methyl orange/phenolphthalein as well but litmus paper would be much easier)
If I were you, I would plan the experiment like that :
Procedure :
1. Prepare two test tubes and some blue and red litmus papers. Label the first test tube as A and the second one as B.
2. Pour the acid into test tube A and alkali into test tube B.
3. Using a dropper, extract some of the acid from test tube A and put a few drops on the blue and red litmus paper.
4. Record your observation.
5. Repeat steps 3 to 4 by using the alkali from test tube B.
The result with acid (Test tube A) :
The BLUE litmus paper turns RED. However the RED litmus paper DOES NOT show any changes.
The result with alkali (Test tube B) :
The BLUE litmus paper DOES NOT show any changes. However, the RED litmus paper changes to BLUE.
(I might made some mistakes here…I’m not confident with my answer but I hope it helps!)
A bond between sulfur and oxygen would be what type of bond?
Answers
Answer:
Covalent Bond
Explanation:
Answer:
covalent bonding
Type of Bonding: Sulfur Dioxide is a process of covalent bonding, since Sulfur and Oxygen are both non-metals. The Sulfur is in the center surrounded by 2 Oxygen atoms. In this situation, as depicted below, Sulfur Dioxide is a resonance structure and can be expressed in three different forms
Explanation:
hope that helps
how many excess electrons are there per lead atom? the atomic number of lead is 82, and its molar mass is 207g/mol
Answers
Lead (Pb) has an atomic number of 82. Since it is a neutral atom, there are no excess electrons per lead atom.
Lead (Pb) has an atomic number of 82, indicating that it has 82 protons and 82 electrons in its neutral state. A neutral atom has an equal number of protons and electrons, resulting in a balanced charge. Therefore, there are no excess electrons per lead atom.
Each lead atom maintains electrical neutrality by having the same number of positively charged protons in its nucleus as negatively charged electrons in its electron cloud. This equilibrium of charges ensures that the lead atom is electrically neutral and does not possess any excess electrons or a net charge.
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WILL MARK AS BRAINLIEST IF CORRECT
Answers
Answer:
I don't know what is the actual answer
how many moles of nh3 contain 1.75 x 1024 molecules?
Answers
Answer:
2.91 moles NH₃
Explanation:
To find the answer, you need to use Avogadro's number to convert between molecules and moles. It is important to arrange the ratio/conversion in a way that allows for the cancellation of units. The final answer should have 3 sig figs because the given value (1.75) also has 3 sig figs.
Avogadro's Number:
6.022 x 10²³ molecules = 1 mole
1.75 x 10²⁴ molecules NH₃ 1 mole
-------------------------------------- x ------------------------------------ = 2.91 moles NH₃
6.022 x 10²³ molecules