The initial pressure is closest to option c (229.8 torr) as none of the given options are exact. To solve this problem, we can use the combined gas law equation which relates the pressure, volume, and temperature of a gas in a closed system. The equation is given as:
(P1V1)/T1 = (P2V2)/T2
where P1, V1, and T1 are the initial pressure, volume, and temperature respectively, and P2, V2, and T2 are the final pressure, volume, and temperature respectively.
We are given the initial and final volumes of the system, and the final pressure. However, we are not given the temperature, so we can assume it remains constant. Thus, we can rearrange the equation to solve for P1:
P1 = (P2V2/V1)
Substituting the values given, we get:
P1 = (180.3 torr x 663.0 mL) / 520.2 mL
P1 = 229.8 torr
Therefore, the initial pressure of the system was 229.8 torr. The correct answer is option C.
To solve this problem, we can use the Boyle's Law formula, which states that the product of the initial pressure (P1) and volume (V1) of a system is equal to the product of the final pressure (P2) and volume (V2), as long as the temperature and quantity of gas remain constant:
P1V1 = P2V2
We are given:
- Initial volume (V1) = 520.2 mL
- Final volume (V2) = 663.0 mL
- Final pressure (P2) = 180.3 torr
- We need to find the initial pressure (P1)
To solve for P1, we can rearrange the formula:
P1 = P2V2 / V1
Now, substitute the given values:
P1 = (180.3 torr)(663.0 mL) / 520.2 mL
P1 ≈ 225.4 torr
The initial pressure is closest to option c (229.8 torr) as none of the given options are exact.
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What volume of hydrogen (in L) is produced
from the complete reaction of 3.143 moles of
hydrochloric acid at STP?
Answer:
35.20
Explanation:
I got it right when I answered it
How does the electron-cloud model describe electrons?
The exact position of an electron can be known.
An electron can be found at certain distances from the nucleus.
An electron has a high probability of being in certain regions.
Each electron follows a specific path around the nucleus.
Answer:
C. An electron has a high probability of being in certain regions.
Explanation:
In the electron cloud model, there are no electron-orbits around the nucleus but a cloud. This cloud has various densities with respect to distance from the nucleus. The most dense region of the cloud (which is the region close to the nucleus) is where electrons has the highest probability of existence.
The model explains that an electron a greater chance of being in the region closer to the nucleus. Thus, an electron has a high probability of being in certain region of the cloud about the central nucleus. And an electrostatic force exists between the nucleus and the electrons.
Answer:
c
Explanation:
1) poomethazine tablers contain 25mg of promethazine per tables Today the factory received 6.6 kg of promethazino powder. How many premethazine can be the nearest tablet. (2) Chidren alleroy revief contain 12.5mg of dipnennydramm HC) per 5mi. How many grams of diphenhydramine HCl are in one gaulon of chidren allergy revief? Round to two decimal places. (3) A prescription is to be taken in the following manner to complere one treatment course i 3 tabs 9.i.d d1ωk,2 tabs t. i. d×1 wh 1 tab b.i.d thereafter to complete 4 total weeks of treatment. Hor many tablets should be dispensed to the patient to complete this 4 loek treatment course?
Answer:
b
Explanation:
the force that one surface exerts on another when the two rub against each other is called _
Answer:
friction
Explanation:
what is saturated solution?12
Answer:
A solution in which the maximum amount of solvent has been dissolved
Explanation:
For example, 36g of salt in 100g of water.
How many grams of AgCl will be formed when 60.0 mL of 0.500 M AgNOâ is completely reacted according to the balanced chemical reaction:
The balanced chemical reaction is given as follows: AgNO3 + NaCl ⟶ AgCl + NaNO3Here, it is required to determine the number of grams of AgCl that will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.
So, let's start by writing the balanced chemical reaction using the molar ratio between AgNO3 and AgCl:AgNO3 + NaCl ⟶ AgCl + NaNO3Molar mass of AgNO3 is 169.87 g/molNumber of moles of AgNO3 = Molarity × Volume = 0.500 mol/L × 0.0600 L= 0.03 molNumber of moles of AgCl = Number of moles of AgNO3 = 0.03 molMolar mass of AgCl is 143.32 g/mol
So, the mass of AgCl that will be formed is:Mass of AgCl = Number of moles of AgCl × Molar mass of AgCl= 0.03 mol × 143.32 g/mol= 4.3 gTherefore, 4.3 grams of AgCl will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.
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37.5 grams of AgCl will be formed when 60.0 mL of 0.500 M AgNO3 is completely reacted.
The balanced chemical reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) is as follows:
AgNO3 + NaCl → AgCl + NaNO3
From the balanced equation, we can see that 1 mole of AgNO3 reacts with 1 mole of NaCl to produce 1 mole of AgCl. Therefore, the molar ratio between AgNO3 and AgCl is 1:1.
To find the number of moles of AgNO3 present in 60.0 mL of 0.500 M AgNO3 solution, we can use the formula:
moles of solute = concentration × volume
moles of AgNO3 = 0.500 M × 0.060 L
moles of AgNO3 = 0.030 moles
Since the molar ratio between AgNO3 and AgCl is 1:1, the number of moles of AgCl formed will also be 0.030 moles.
To calculate the mass of AgCl formed, we can use the molar mass of AgCl, which is 143.32 g/mol:
mass of AgCl = moles of AgCl × molar mass of AgCl
mass of AgCl = 0.030 moles × 143.32 g/mol
mass of AgCl = 4.2996 grams
Rounding to the appropriate number of significant figures, the mass of AgCl formed is 4.30 grams.
When 60.0 mL of 0.500 M AgNO3 is completely reacted, 37.5 grams of AgCl will be formed. This calculation is based on the balanced chemical equation and the given concentration and volume of the AgNO3 solution.
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a student performing an experiment has a container containing 14 g n2, 64 g o2, 8 g he, and 35 g cl2, at a total pressure of 380 mmhg. what is the partial pressure of each gas?
The partial pressure of each gas are 24.13 mmHg, 96.5 mmHg, 9.6 mmHg, and 48.7 mmHg.
The total pressure of 380 mmHg is composed of the partial pressure of each gas in the container. To calculate the partial pressure of each gas, you will need to use the ideal gas law equation:
P = (nRT)/V, where P is the pressure, n is the number of moles of the gas, R is the ideal gas constant, T is the temperature, and V is the volume. Using this equation, we can calculate the partial pressure of each gas as follows:
Nitrogen (\(N_2\)): 14 g \(N_2\) is equal to 1 mol, so the partial pressure is (1 x 0.0821 x 298.15)/1 = 24.13 mmHg
Oxygen (\(O_2\)): 64 g \(O_2\) is equal to 4 mol, so the partial pressure is (4 x 0.0821 x 298.15)/1 = 96.5 mmHg
Helium (He): 8 g He is equal to 0.4 mol, so the partial pressure is (0.4 x 0.0821 x 298.15)/1 = 9.6 mmHg
Chlorine (\(Cl_2\)): 35 g \(Cl_2\)is equal to 1.875 mol, so the partial pressure is (1.875 x 0.0821 x 298.15)/1 = 48.7 mmHg
Therefore, the partial pressure of Nitrogen (N), Oxygen (O), Helium (He), and Chlorine (Cl) in the container are 24.13 mmHg, 96.5 mmHg, 9.6 mmHg, and 48.7 mmHg, respectively.
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(b) Given that ΔG° for reaction 1 is positive (155kJ/molrxn), what must be true about the sign of ΔH° for the reaction? Justify your answer
Answer: The sign of ΔH° for the reaction is positive.
Explanation:
Given: \(\Delta G^{o}\) = 155 kJ/mol (1 kJ = 1000 J) = 155000 J/mol
The relation between \(\Delta G^{o}\) and \(\Delta H^{o}\) is as follows.
\(\Delta G^{o} = \Delta H^{o} - T \Delta S\)
As the given value of \(\Delta G^{o}\) is positive. This means that on further calculation the value of \(\Delta H^{o}\) will come out to be positive.
Thus, we can conclude that the sign of ΔH° for the reaction is positive.
In a closed system, the amount of the non-expansion work that can be done is called gibs free energy. The enthalpy cahnge will be positive.
What is enthalpy?The enthalpy of the system is given as the addition of products of the pressure and the volume with the internal energy of the system.
The Gibbs free energy is given by the formula:
\(\rm \Delta G^{\circ} = \Delta H ^{\circ} - T\Delta S\)
When Gibbs's free energy is positive then the enthalpy will become positive.
Therefore, the enthalpy change will be positive.
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if a material is ohmic what do you expect the reistance to be
If a material is ohmic, the resistance is expected to be constant. An ohmic material is a material that follows Ohm's law. In other words, the electric current flowing through the material is proportional to the potential difference or voltage applied across the material at a constant temperature and pressure.
The resistance of the ohmic material is defined by the ratio of the potential difference applied to the current flowing through the material. If a material follows Ohm's law, it is considered to be an Ohmic material. In ohmic materials, the resistance is constant, meaning it doesn't vary as the voltage and current change. If the current through an ohmic material is doubled, the voltage across the material is also doubled.
Hence, the resistance of the material remains constant. In contrast, the resistance of non-ohmic materials varies with voltage and current. Resistance is the degree to which an object opposes the flow of electrical current. The resistance of a material depends on its physical properties such as length, cross-sectional area, and temperature. The resistance of a conductor is defined by the ratio of the voltage applied across it to the current that flows through it. The unit of resistance is ohms (Ω).
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What are 2 substances that can CAN conduct electricity? Plz explain.
Answer:
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thє ѕuвѕtαncєѕ thαt cσnduct єlєctrícítч αrє cαllєd cσnductσrѕ.
thє єхαmplєѕ σf cσnductσrѕ αrє -
ѕílvєr cσppєr gσldhσpє hєlpful~
~ єхhαuѕtєd zσmвíєAnswer:
There are two categories of materials that are good conductors of electricity: metals and plastics. Metals conduct in the solid state because they contain mobile electrons, or electrons that may move about freely. When a copper wire is utilized in an electrical circuit, electrons pass through it every time the switch is flipped...
Explanation:
What is the pH of a solution with {H+} = 2.3 x 10^-6?
A) -5.64
B) 6.00
C) 5.64
D) -0.36
correct answer is C)
The pH scale is a way to measure the acidity or basicity of a solution. pH is defined as the negative logarithm (base 10) of the hydrogen ion concentration, [H+], in moles per liter.
The higher the concentration of hydrogen ions, the lower the pH value; conversely, the lower the hydrogen ion concentration, the higher the pH value.A solution with a hydrogen ion concentration of 2.3 x 10^-6 has a pH of 5.64, according to the pH scale. The pH can be calculated using the following formula:pH = -log[H+]In this case, the hydrogen ion concentration is 2.3 x 10^-6, so the pH is:-log(2.3 x 10^-6) = 5.64Therefore, the correct answer is C) 5.64.For such more question on hydrogen ions,
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complete reduction of the ketones in benzil to alcohols with nabh4 leads to three stereoisomers. draw fischer projections of the three stereoisomers. state whether each is optically active or not.
Three stereoisomers two optically active isomers and one non-optically active meso isomer—are produced when benzil is completely reduced with NaBH₄.
When benzil undergoes complete reduction with NaBH₄, three stereoisomers of the resulting alcohols are formed due to the presence of two chiral centers. The Fischer projections of the three stereoisomers can be drawn as follows:
1. 2R,3S-2,3-butanediol:
CH₃ CH₃
| |
OH OH
| |
CHOH CHOH
| |
CH₃ CH₃
This stereoisomer is optically active because it has two different chiral centers.
2. 2S,3S-2,3-butanediol:
CH₃ CH₃
| |
OH OH
| |
CHOH CHOH
| |
CH₃ CH₃
This stereoisomer is also optically active because it has two different chiral centers.
3. meso-2,3-butanediol:
CH₃ CH₃
| |
OH OH
| |
CHOH CHOH
| |
CH₂OH CH₂OH
This stereoisomer is not optically active because it has a plane of symmetry that divides the molecule into two mirror-image halves.
Therefore, the complete reduction of benzil with NaBH₄ leads to three stereoisomers: two optically active isomers and one meso isomer that is not optically active.
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What is a good example of ACCURACY and PRECISION? *
Answer:
Bow and arrow
Explanation:
A bow and arrow need accuracy to hit a target. It needs precision to hit the small target
what is a mixture of elements and compounds
The substance in the image above would be classified as a mixture of elements (option E).
What is a compound and mixture?A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.
On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.
According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.
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Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements.
C :
H:
N:
O:
P:
CI:
Answer:
Look at the screenshot below.
Those are your answers!
Good Luck.
Explanation:
The number of valence electrons for neutral atoms is the same as the number of the atom's main group.A periodic table element's column can be used to determine its main group number.For instance, carbon, which belongs to group 4, has four valence electrons.
Use the periodic table to identify the number of valence electrons available for bonding for each of the following elements?
This rule states that each group of elements has one valence electron, two valence electrons in group 2, three valence electrons in group 13, four valence electrons in group 14, and so on. C : Six electrons make up the atom of carbon: four valence (outermost shell) electrons in the 2s and 2p orbitals, and two inner shell (core) electrons in the 1s orbital. H : As the initial element, hydrogen has an electron configuration of 1s1.Its valence shell only contains one electron.The outermost electrons or those with the highest energy level are called valence electrons. N : The periodic table's Group 15 is headed by nitrogen, which has either 3 or 5 valence electrons. O : On the periodic table, column 6 contains oxygen (symbol O).Its valence electrons number six.To obtain an octet, two bonds must be created. Ci : If chlorine removes one of its seven valence electrons, it will have eight (an octet).When chlorine gains one electron, its electron configuration resembles that of argon.If chlorine had given up all seven of its valence electrons and sodium had taken them, the octet rule would have been met.To learn more about periodic table refer
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Tessa knows that the sea grape tree can grow well in areas of high st and poor soil. She has seen sea grape growing along the beach strands and coastal hammocks of south Florida. She sets up an experiment to see which amount of salt is best for sea grape. She chooses two plants. She gives pure water to the first plant and a strong salt water solution could Tessa do to improve her experiment? the econd. Then, she measures growth.
The normal boiling and freezing points of argon are 87.3 K and 84.0 K. The triple point is at 82.7 K and 0.68 atmosphere. Use the data above to draw a phase diagram for argon. In the diagram, label the spots where the solid, liquid, and gas phases are stable as well as show the position of the normal boiling point.
INFORMATION:
We know that:
- The normal boiling and freezing points of argon are 87.3 K and 84.0 K
- The triple point is at 82.7 K and 0.68 atmosphere.
And we must draw a phase diagram for argon using the data
STEP BY STEP EXPLANATION:
To draw the diagram, we must graph first the triple point since it is the common point for the three states of the argon
Then, we need to use that the normal boiling and freezing points of argon are 87.3 K and 84.0 K to divide he states of the argon in the graph
Finally, we need to show the position of the normal boiling point
So, we obtain the next graph
ANSWER:
Help me please…………..d
Why had the number of bolsheviks increased so much by 1917
There were several factors that contributed to the significant increase in the number of Bolsheviks by 1917.
Firstly, the harsh living conditions of the Russian people, particularly the peasants and industrial workers, created a sense of dissatisfaction with the government and the ruling class. The Bolsheviks offered a radical solution to these problems, promising a revolution that would establish a socialist system that would benefit all people.
Secondly, the leadership of Vladimir Lenin was crucial in the growth of the Bolshevik Party. Lenin was a skilled orator and strategist, and he was able to rally support for the Bolshevik cause through his speeches and writings. He also recognized the importance of creating a strong, centralized party organization, which allowed the Bolsheviks to coordinate their efforts and gain support from a wide range of people.
Finally, the events of World War I and the Russian Revolution of 1917 created a volatile political environment that favored the Bolsheviks. The war led to widespread discontent among the Russian people, and the revolution weakened the authority of the government and the ruling class. The Bolsheviks were able to capitalize on these conditions, using their organization and ideology to gain support and eventually seize power in October 1917.
Overall, the increase in the number of Bolsheviks by 1917 can be attributed to a combination of factors, including the harsh living conditions of the Russian people, the leadership of Vladimir Lenin, and the political environment created by World War I and the Russian Revolution.
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Write any three acids which are used in our daily life. Also, write an application of each
The chemical equation below shows the reaction of methane (CH4) and oxygen gas (O2) to form carbon dioxide (CO2) and water (H2O).
CH4 + 2O2 → CO2 + 2H2O
In this equation, which of the following are products?
Answer:
CO2 + 2H2O
Explanation:
left side of the equation is the products side, right side is the reactant side
Answer:
Carbon Dioxide(CO2) and Water (H2O)
Explanation:
Whatever is on the right side of the equation is the products, the left side is the reactants.
Which part of the periodic table would contain an element with a partially filled fsublevel?
Answer:
The lanthanides
Explanation:
The lanthanides and actinides section of the periodic table is known as the f block, and they usually are all metals and are similar in reactivity to the Group 2 (the alkaline earth metals)
1. The motion of an object is described as 240 mph to the northeast. What form of
motion is being described?
a. Speed
b. Velocity
c. Acceleration
d. None of the above
The form of motion which is described is velocity as it is describing the speed as well as the direction.
What is motion?Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.
Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.
Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic mechanics is based on modern kinematics.
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I'll give brianliest if correct .
Answer:
the answer is decaying wood
Which term is defined as the sum of protons and neutrons in an atom.
Answer:
Mass number
Explanation:
Two comets are 300 m apart. One
comet has a mass of 80,000 kg. The
force between them is
1.48 x 10-6 N. What is the mass of the
other comet?
A) 25,000 kg
B) 250 kg
C) 3700 kg
D) 500 kg
Answer:
a
Explanation:
A reaction at equilibrium has 2 moles of gas as reactants and 3 moles of gas as products. Explain how the reaction will shift to relieve the stress if the pressure is increased.
If the pressure is increased in a reaction at equilibrium with 2 moles of gas as reactants and 3 moles of gas as products, the system will shift towards the reactant side to reduce the pressure by decreasing the concentration of gas molecules.
If the pressure is increased in a reaction at equilibrium, the system will shift in a way that reduces the overall pressure to relieve the stress. This is based on Le Chatelier's principle, which states that when a system at equilibrium is subjected to a change, it will respond by shifting in a direction that minimizes the effect of the change.
In this case, increasing the pressure means that the system is experiencing higher concentrations of gas molecules per unit volume. To reduce the pressure, the system will shift in the direction that reduces the total number of moles of gas.
To accomplish this, the reaction will favor the side with fewer moles of gas molecules. According to the given information, there are 2 moles of gas as reactants and 3 moles of gas as products. Therefore, to decrease the pressure, the system will shift towards the side of the reaction with fewer moles of gas.
By shifting towards the side with fewer gas moles, the system will reduce the total pressure exerted by the gas molecules. This shift can be achieved by either decreasing the number of gas molecules on the product side or by increasing the number of gas molecules on the reactant side.
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How many atoms are in 14 moles of carbon?
Answer:
8.42800000E+24 (E meaning an exponant of 10)
Explanation:
1 mole = 6.02×10^23
14 moles = 1 mole × 14
14 moles = 8.42800000E+24
4. Describe in words the reaction represented by the equation and
include a description of the composition of each kind of molecule.
2 H2 + O2 → 2 H2O
the process of _____ determines a substance’s physical or chemical identity with as near absolute certainty as existing analytical techniques will permit.
The process of spectroscopy determines a substance's physical or chemical identity with as near absolute certainty as existing analytical techniques will permit.
Spectroscopy is the study of the interaction of electromagnetic radiation with matter and is a crucial tool in chemical analysis. By studying the spectrum of a substance (the way it absorbs, emits, or reflects light), spectroscopy can provide information about the composition, structure, and properties of the substance, thereby allowing for its identification with high accuracy.
Spectroscopy is a broad and interdisciplinary field that encompasses many different techniques for studying the interaction of electromagnetic radiation with matter. It plays a crucial role in various areas of science, including physics, chemistry, biology, and materials science. Spectroscopy provides information about the composition, structure, and properties of substances by analyzing the way they interact with light.
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