Answer:
ture
Explanation:
The potential energy of any system veritably depends upon the distance depending upon the types of forces acting on the objects. The potential energy undeniably depends upon the distance and is inversely proportional to each other. If the force between the two is attractive then the potential energy will increase with increasing distance between them both, and if the force is repulsive then the potential energy will increase will decreasing the distance between them.
(WILL TRY TO GIVE BRAINLY!!!!!!!)
Courtney burns wood in an outdoor firepit. She measures the mass of the ashes that remain after the fire, and the mass is much lower than the wood that she burned. What would be the best explanation for what Courtney observes?
A. gases are released into the air
B. water inside the wood solidifies
C. heat caused the molecules to lose density
D. atoms in the wood are destroyed
Answer:
When wood is burned, it undergoes a chemical reaction called combustion, which produces heat, light, and various gases such as carbon dioxide, water vapor, and nitrogen oxides. These gases are released into the air, leaving behind a residue of ash that is much lighter than the original wood. Therefore, option A is the best explanation for what Courtney observes.
why does direction matter please i beg you to help me its in science ill give you brainliest if the answer is right
In science, direction can be important because it can affect the outcome of an experiment.
What is direction?Direction is the process of guiding or instructing someone to a particular destination or goal. It can include giving instructions, leading and pointing out a path to follow, or providing assistance to help a person or group reach a certain destination. Direction can be provided verbally or using visual cues, such as maps or diagrams. It is an essential skill for many professions, such as teaching, management and leadership roles. Direction can also help with problem solving, as it can help to identify the steps needed to reach a desired result.
For example, if you are conducting a test on the effects of wind on a plant, the direction of the wind can have a significant effect on the results of the experiment. If the wind is blowing from the north, it will have a different impact on the plant than if it was blowing from the south. Direction can also be important in physics when looking at the movement of objects, or when understanding the forces that are acting on them.
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Express the rate of reaction in terms of the change in concentration of each of the reactants and products: 2D(g) + 3E(g) + F(g) → 2G(g) + H(g) Rate = − 2 Δ[D] Δt = − 3 Δ[E] Δt = − Δ[F] Δt = 2 Δ[G] Δt = Δ[H] Δt Rate = 1 2 Δ[D] Δt = 1 3 Δ[E] Δt = 2 3 Δ[F] Δt = − 1 2 Δ[G] Δt = − Δ[H] Δt Rate = − 1 2 Δ[D] Δt = − 1 3 Δ[E] Δt = − Δ[F] Δt = 1 2 Δ[G] Δt = Δ[H] Δt When [D] is decreasing at 0. 74 mol/L·s, how fast is [H] increasing?
The rate of the reaction is correlated with the variation in concentration of each reactant and product, as can be seen from the rate expressions provided.
Express the rate of reaction in terms of the change in concentration of each of the reactants and products:Rate = 1/2 [D] / [H] / [T]
This demonstrates that the reaction's rate and [H] concentration change are directly inversely related. Given that [D] is vanishing at a rate of 0.74 mol/L/s, the following conclusions can be drawn:
[D]/[t] = -0.74 mol/Ls We can solve for [H] / t by substituting this value into the rate expression above: Rate = 1/2 [D] / [H] / [T], ([H] / t) = -1/2 (-0.74 mol/Ls), [H]/[t] = 2(0.74 mol/L s) = 1.48 mol/L s With [D] decreasing at a rate of 0.74 mol/L, [H] is therefore increasing at a rate of 1.48 mol/L/s.
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Find the mass of liquid water required to absorb 3.12×10^4 kJ of heat energy on boiling.
Answer in units of g.
Approximately 13836 grams (or 13.8 kg) of liquid water is required to absorb 3.12×10^4 kJ of heat energy on boiling.
How to find the mass of liquid water required to absorb ?To find the mass of liquid water required to absorb 3.12×10^4 kJ of heat energy on boiling, we need to use the following formula:
q = m * ΔH
Where
q is the heat energy absorbedm is the mass of the waterΔH is the enthalpy of vaporization of waterThe enthalpy of vaporization of water is 40.7 kJ/mol.
To convert kJ to J, we multiply by 1000:
q = 3.12×10^4 kJ = 3.12×10^7 J
Substituting the values, we get:
3.12×10^7 J = m * (40.7 kJ/mol)
To solve for the mass of water, we need to first convert the enthalpy of vaporization to J/g:
40.7 kJ/mol = 40.7×10^3 J/mol
The molar mass of water is 18.015 g/mol, so we can calculate the enthalpy of vaporization per gram:
40.7×10^3 J/mol / 18.015 g/mol = 2257 J/g
Substituting this value, we get:
3.12×10^7 J = m * (2257 J/g)
Solving for m, we get:
m = 3.12×10^7 J / (2257 J/g)
m ≈ 13836 g
Therefore, approximately 13836 grams (or 13.8 kg) of liquid water is required to absorb 3.12×10^4 kJ of heat energy on boiling.
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HELP ME PLEASE
Which of the following best explains why ice help keep aquatic animal alive in the winters?
Responses
Because water temporarily freezes the fish and actually extends their life span.
Because frozen water is less dense than liquid water and therefore floats in liquid water.
Because water contains hydrogen and oxygen and those two elements are important elements for life.
Because the frozen water is more dense than liquid water and therefore floats in liquid water
Answer: Because frozen water is less dense than liquid water and therefore floats in liquid water.
True or False: As a ball falls toward the ground, the ball's potential energy decreases as it converts to kinetic energy.
Answer:
I think it is true
Explanation:
I just answer this question
In osmosis, if a membrane separates two solutions, liquid will tend to move from
the side with the stronger solution to the side with the weaker solution. A tea bag
is placed inside a cup of hot water. Which best describes the process of osmosis
in this situation?
1.Osmosis does not occur because the hot water is the only solution.
2.The water, having a stronger concentration, moves inside the tea bag.
3.The water near the tea leaves, having a stronger concentration of tea,
moves outside the tea bag.
4.The tea leaves, having a weaker concentration, release their juices
into the water.
Answer:
2.The water, having a stronger concentration, moves inside the tea bag.
Explanation:
This is a form of osmosis called hypotonic, in which a solution with higher amounts of fluids than the cell will cause the cell to swell and expand. The opposite happens in hypertonic when the solution has fewer fluids than the cell, causing the cell to shrink. Essentially the liquid moves from the higher concentration to the lower one.
Element X has an electronegativity of 2. 5 and Y has an electronegativity of 9. X is a ____ and Y is a _____. A) Metal, nonmetal
B) Nonpolar Metal, Metal C) nonmetal, Metal
D) Metal, nonpolar metal
Element X has an electronegativity of 2. 5 and Y has an electronegativity of 9. X is a metal and Y is a non-metal.
The correct answer is option a.
Element X has a lower electronegativity than Element Y, which means that Element X is a metal and Element Y is a nonmetal.
The capacity of an atom to draw electrons towards itself when it establishes a chemical connection with another atom is measured as electronegativity. It is a fundamental feature of atoms and is commonly measured on the Pauling scale, which provides numerical values ranging from 0.7 (for the least electronegative element, cesium) to 4.0 (for the most electronegative element, uranium) (for the most electronegative element, fluorine).
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How much carbon dioxide is produced with 1000 grams of gasoline
Burning 1000 grams of gasoline results in about 2.3 kilograms (5.1 pounds) of carbon dioxide.
What is carbon dioxide?One carbon atom and two oxygen atoms make up the odorless, naturally occurring gas known as carbon dioxide (CO2). The atmosphere of Earth contains most of it, which makes up roughly 0.04 percent of the air there.
Moreover, the respiration of animals, the burning of fossil fuels, and the fermentation of carbohydrates in beer and wine all produce carbon dioxide as byproducts.
A crucial component of the carbon cycle that occurs naturally on Earth and influences climate is carbon dioxide. Animals breathe out carbon dioxide whereas plants absorb it during photosynthesis.
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HELP WOTH NUMBER 7 PLEAAASE AM A I TURNING 5 MOLES OF COPPER INTO COPPER II NITRATE? ORRRR……
The mass of copper (ii) nitrate formed is 469 g Cu(NO₃)₂
What moles of copper nitrate are formed?The balanced chemical equation for the reaction between copper and silver is as follows:
Cu + 2 AgNO₃ → Cu(NO₃)₂ + 2 AgFrom the equation, the mole ratio of Ag and Cu(NO₃)₂ is 2 : 1
5.0 moles Ag × 1 mole Cu / 2 moles Ag = 2.5 moles Cu
2.5 moles Cu × 1 mole Cu(NO3)2 / 1 mole Cu = 2.5 moles Cu(NO₃)₂
The mass of 2.5 moles Cu(NO₃)₂ = 2.5₂ × 187.56 g/mol
Mass of copper (ii) nitrate = 469 g Cu(NO₃)₂
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Please i need help urgently. Is the formation of a fluid bubble on the penny an example of cohesion or adhesion? Explain
Answer:
The attraction of water molecules to other substances, like soil or glass, is called adhesion. As drops of water are added onto a penny, the adhesive force between the water and the penny keeps the water from falling off.
Explanation:
The formation of a fluid bubble on a penny is an example of cohesion, not adhesion.
When a penny is wetted with a small amount of water, the water molecules are attracted to each other by cohesive forces, which are intermolecular forces that bind molecules of the same substance together. As a result, the water molecules tend to stick to each other rather than to the surface of the penny, forming a rounded shape or a "bubble".
The cohesive forces between water molecules are strong enough to overcome the gravitational force acting on the small volume of water on the penny, which is why the water does not run off the penny. This phenomenon is also known as surface tension, which is the cohesive force that acts between molecules at the surface of a liquid.
In contrast, adhesion refers to the intermolecular forces that bind different substances together, such as the attraction between water molecules and a surface. If the adhesive forces between water and the penny were stronger than the cohesive forces between water molecules, the water would spread out over the surface of the penny, rather than forming a bubble. However, in the case of the penny and water, the cohesive forces between water molecules are stronger than the adhesive forces between water and the penny, resulting in a fluid bubble.
If 625 g of Fe3O4 is produced in the reaction, how many moles of hydrogen re produced at the same time ?
Answer:
Explanation:
Really need the equation. But I am assuming it is this
3 Fe + 4 H20 --> Fe3O4 +4 H2
625 gFe3O4 / 232 g Fe3O4 X 4 moles H2 / 1 mole Fe3O4 = 10.78 moles H2
If this equation is different than the one in your question you just need to plug in the number in front of the H2 where I have written a 4.
If 625 g of Fe[tex]_3[/tex]O[tex]_4[/tex] is produced in the reaction, 10.78 moles of hydrogen are produced at the same time.
What is mole?In the Worldwide System of Units, the mole (sign mol) is indeed the unit of material quantity (SI). The quantity of a substance is a measurement that indicates how many elementary constituents of a certain substance are present in an object as well as sample.
The mole has been defined as having 6.022×10²³ elementary entities.
3 Fe + 4 H[tex]_2[/tex]O → Fe[tex]_3[/tex]O[tex]_4[/tex] +4 H[tex]_2[/tex]
625g Fe[tex]_3[/tex]O[tex]_4[/tex] / 232g Fe[tex]_3[/tex]O[tex]_4[/tex] X 4 moles H2 / 1 mole Fe[tex]_3[/tex]O[tex]_4[/tex] = 10.78 moles H[tex]_2[/tex]
Therefore, 10.78 moles of hydrogen are produced at the same time.
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How many moles are 5.42x10^26 atoms of calcium
900moles are 5.42x10²⁶ atoms of calcium.
What does the Avogadro number mean?
Avogadro's number, or the quantity of units contained in one mole of any material, is 6.02214076* 10²³. Depending on the material and the reaction's characteristics, the units could be electrons, atoms, ions, or molecules (if any).
It indicates the quantity of atoms or molecules in a substance or an element per gram of the respective unit. The number is 6.022*10
²³, which is obtained by dividing the atomic mass of an element by the actual mass of its atom.
There are 6.02*10²³ atoms in one mole
So, 5.42x10²⁶ atoms of calcium will be [tex]5.42x10^{26}/6.02*10 ^{23[/tex] moles i.e.
900moles.
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Amixture of0.5 mole of ethanoic acid and 1 mole of ethanol in Idm' was allowed to reach equilibrium at room temperature.
The equilibrium mixture was quickly titrated and 40 cm° of 2 mol dm sodium hydroxide was used in the titration.
(a) Why was the reaction titrated quickly?
(b) Using the titration results, calculate the number of
moles of
(t) ethanoic acid left in the equilibrium mixture. (ii) ethanoic acid reacted. (ili) ethanol reacted.
(iv) ethanol left in the equilibrium mixture.
(e) Caleulate the equilibrium constant for the reaction between ethanoic acid and ethanol at room temperature.
(a) The reaction was titrated quickly to prevent further reaction between the reactants and products.
(bi) Number of moles of ethanoic acid left in the equilibrium mixture = 0.42 mol
ii) Number of moles of ethanoic acid reacted is 0.08 mol
iii) the number of moles of ethanol reacted is also 0.08 mol.
iv) Number of moles of ethanol left in the equilibrium mixture = 0.92 mol
(e) The equilibrium constant for the reaction between ethanoic acid and ethanol at room temperature is 0.209 dm^3/mol.
Titration of Ethanoic Acid(a) The reaction was titrated quickly to prevent further reaction between the reactants and products. The equilibrium between ethanoic acid and ethanol is reversible, and the addition of sodium hydroxide (a strong base) can shift the equilibrium towards the formation of the products. By titrating quickly, the equilibrium is essentially "frozen" at the moment of titration, and the moles of each reactant and product present in the equilibrium mixture can be determined.
(b) The balanced equation for the reaction between ethanoic acid and ethanol is:
CH3COOH + C2H5OH ⇌ CH3COOC2H5 + H2O
(i) Number of moles of ethanoic acid left in the equilibrium mixture:
Number of moles of sodium hydroxide used = 40 cm^3 × 2 mol/dm^3 = 0.08 mol
Since the stoichiometric ratio between sodium hydroxide and ethanoic acid is 1:1, the number of moles of ethanoic acid reacted is also 0.08 mol.
Number of moles of ethanoic acid left in the equilibrium mixture = 0.5 mol - 0.08 mol = 0.42 mol
(ii) Number of moles of ethanoic acid reacted:
0.08 mol
(iii) Number of moles of ethanol reacted:
Since the stoichiometric ratio between ethanol and ethanoic acid is 1:1, the number of moles of ethanol reacted is also 0.08 mol.
(iv) Number of moles of ethanol left in the equilibrium mixture:
Number of moles of ethanol initially present = 1 mol
Number of moles of ethanol reacted = 0.08 mol
Number of moles of ethanol left in the equilibrium mixture = 1 mol - 0.08 mol = 0.92 mol
(e) The equilibrium constant (Kc) for the reaction can be calculated using the concentrations of the reactants and products at equilibrium. At equilibrium, the concentration of each component can be calculated as follows:
[ethanoic acid] = 0.42 mol / 1 dm^3 = 0.42 mol/dm^3
[ethanol] = 0.92 mol / 1 dm^3 = 0.92 mol/dm^3
[ethyl ethanoate] = 0.08 mol / 1 dm^3 = 0.08 mol/dm^3
Kc = ([ethyl ethanoate] x [H2O]) / ([ethanoic acid] x [ethanol])
= (0.08 mol/dm^3) / (0.42 mol/dm^3 x 0.92 mol/dm^3)
= 0.209 dm^3/mol
Therefore, the equilibrium constant for the reaction between ethanoic acid and ethanol at room temperature is 0.209 dm^3/mol.
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help i dont understand how to answer the question
Pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
What is Boyle's law?Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, seems to be an observational gas law that specifies the connection between confined gas pressure and volume.
If the temperature as well as quantity of gas stay constant within a closed system, the absolute pressure applied by a constant amount of an ideal gas seems to be inversely correlated with the volume it fills. Pressure is independent variable and volume is dependent variable.
Therefore, pressure is independent variable and volume is dependent variable. During the investigation, the temperature and quantity of gas are kept constant.
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Pls I need help urgently. Find the Lewis dot structure for water and ethanol and examine the structures and identify which part is partial negative and partial positive.
Both the hydrogen and oxygen atoms in water have a partial positive and negative charge. Both hydrogen and carbon ions are both somewhat positive in ethanol, while oxygen is partially negative.
Are ethanol and alcohol the same thing?The c (C), oxygen (O), & hydrogen (H) atoms that make up alcohols are combined to form organic molecules. The alcohol is known as ethanol if it contains two carbons (also known as ethyl alcohol). In beverages like beer and wine, alcohol is present in the form of ethanol.
Is alcohol ethanol's fundamental form?An constituent in alcoholic drinks including beer, wine, and brandy, ethanol is also known as alcohol, ethyl alcohol, and grain alcohol. It is a transparent liquid with no color. Ethylene can be hydrated to make ethanol, which is a naturally occurring result of plant fermentation.
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The Lewis dot structures for water (H2O) and ethanol (C2H5OH) are as follows:
Water (H2O):
H
/
H O
\ /
H
Ethanol (C2H5OH):
H H
\ /
C
/
H H
|
O
|
H
In both structures, the oxygen atom has a higher electronegativity than the hydrogen or carbon atoms, meaning it attracts electrons more strongly. As a result, the oxygen atom in both water and ethanol has a partial negative charge (denoted by the symbol δ-), while the hydrogen atoms have a partial positive charge (denoted by the symbol δ+). This polarity arises due to the unequal sharing of electrons between the oxygen and hydrogen atoms, with the oxygen atom attracting the electrons more strongly.
In water, the partial negative charge on the oxygen atom creates a hydrogen bond with the partial positive charge on a neighboring hydrogen atom of a nearby water molecule, resulting in the formation of a network of hydrogen bonds. These hydrogen bonds give water its unique properties, such as high surface tension and high boiling and melting points.
In ethanol, the partial negative charge on the oxygen atom is also responsible for the molecule's polarity. The carbon atom is partially positive due to the electron-withdrawing effect of the oxygen atom, which makes ethanol more soluble in polar solvents such as water. Ethanol can also form hydrogen bonds with water due to the presence of the hydroxyl (OH) group.
What term describes the application of water to farmland from
a source such as a lake or river?
The term that describes the application of water to farmland from a source such as a lake or river is "irrigation."
What is Irrigation?
Irrigation is the process of artificially supplying water to crops or plants to promote their growth and development. It involves the application of water to agricultural land using various techniques, such as sprinklers, drip systems, or flood irrigation. The primary purpose of irrigation is to supplement the natural rainfall that is insufficient or irregular in certain regions, allowing farmers to grow crops in areas that would otherwise be unsuitable for farming. Irrigation systems can be designed to deliver the required amount of water directly to the roots of plants, which can increase crop yields and improve the quality of the produce. However, overuse or mismanagement of irrigation can lead to waterlogging, soil salinization, and other environmental problems.
Irrigation is the artificial application of water to land for the purpose of agricultural production. It is a critical practice in areas where rainfall is insufficient or unreliable, as it provides a reliable source of water for crops to grow. Irrigation systems can vary widely depending on the type of crops being grown, the availability of water, and the topography of the land.
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The oxidation of so2 to so3 is accelerated by no2. The reaction proceeds according to:no2(g)+so2(g)⟶no(g)+so3(g)2no(g)+o2(g)⟶2no2(g)part ashow that, with appropriate coefficients, the two reactions can be summed to give the overall oxidation of so2 by o2 to give so3. Express your answer as a chemical equation. Identify all of the phases in your answer
The overall reaction for the oxidation of SO2 by O2 to give SO3 is:
SO2(g) + O2(g) ⟶ 2SO3(g)
The two given reactions are:
NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)
2NO(g) + O2(g) ⟶ 2NO2(g)
Adding these reactions, we get:
NO2(g) + SO2(g) ⟶ NO(g) + SO3(g)
2NO(g) + O2(g) ⟶ 2NO2(g)
2NO2(g) + SO2(g) + O2(g) ⟶ 2NO(g) + 2SO3(g)
Therefore, the overall reaction for the oxidation of SO2 by O2 to give SO3 is:
SO2(g) + O2(g) ⟶ 2SO3(g)
where the catalyst NO2 is not explicitly shown. All the reactants and products are in the gas phase.
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Give one which the candle experiment and lavoisier experiment are same and different
Answer:
There are two different effects. Both a chemical and a physical reasoning are needed to explain what we can see. Both physics and chemistry matter. The initial cancellation effect can confuse the observer. Mathematics plays a role when the chemical equations are balanced.
Explanation:
hope this helps u:))
How many milligrams of ca2+ are present in 10. 0 ml of blood if 20. 72 ml of 0. 000903 m kmno4 solution is needed for the titration
Answer: 87690.67
Explanation: I don't even know if that's correct but i tried and i got close to that answer the i looked it up to see if i did it correctly and it rounded it up to that sooooooooo.........yeah.
How many moles of water will be produced from the complete combustion of 3 moles of C3H8?
If you have 3 moles of carbon dioxide and 4 moles of water that is being produced by a combustion of propane. That would make your answer be 4 moles
Hope this helps :)
The tails of animals can serve many important functions. They are mainly used in balance and locomotion. Many lizards have a fragile, detachable tail that will come off when they are attacked by predators, allowing them to escape.
Why is the presence of a brightly colored, detachable tail an advantage for some lizards?
Answer:
The presence of a brightly colored, detachable tail can be advantageous for some lizards because it serves as a distraction or decoy for predators. When a predator attacks, the lizard can quickly detach its tail, which wriggles and continues to move for a short period of time. This sudden movement can divert the predator's attention away from the lizard's body, allowing the lizard to escape.
The bright coloration of the tail can also help to draw the predator's attention towards it, instead of the lizard's body. Bright colors are often used in the animal kingdom as warning signals, indicating that an animal is toxic or dangerous. While the lizard may not necessarily be toxic or dangerous, the bright colors of its tail can create a similar effect, deterring predators from attacking in the first place.
Additionally, the detachable tail can serve as a form of self-defense, allowing the lizard to escape from a predator's grasp. By detaching its tail, the lizard can leave the predator with a distraction while it makes its escape. Over time, the lizard can regrow its tail, allowing it to continue to use this defense mechanism in the future.
What mass, in kg, of lithium hydroxide can be produced from 9.41 moles of lithium nitride? 1kg = 1000g
1Li3N + 3H2O = 3LiOH + 1NH3
Answer:
0.67752kg
Explanation:
Mole ratio of LiOH to Li3N
=n(LiOH)/n(Li3N
=3/4
If a volume of a gas is at 19 L and 45C with a pressure of 25 atm, what will the pressure be, in mmH, if the volume is changed to 23 L if the molar mass and temperature are held constant?
• 15693.998 mmHg
• 1203.5 mmHg
• 20.6 mmHg
• 168 mmHg
Considering the Boyle's law, the pressure will be 5693.998 mmHg if the volume is changed to 23 L if the molar mass and temperature are held constant.
Definition of Boyle's lawBoyle's law states that the pressure of a gas in a closed container is inversely proportional to the volume of the container, when the temperature is constant and is expressed mathematically as:
P×V= k
where
P is the pressure.V is the volume.k is a constant.Considering an initial state 1 and a final state 2, it is fulfilled:
P₁×V₁= P₂×V₂
Pressure in mmHgIn this case, you know:
P₁= 25 atm V₁= 19 LP₂= ?V₂= 23 LTemperature are held constant.Replacing in Boyle's law:
25 atm× 19 L= P₂× 23 L
Solving:
(25 atm× 19 L)÷ 23 L= P₂
20.65 atm= 15693.998 mmHg= P₂ (being 1 atm= 760 mmHg)
Finally, the pressure will be 5693.998 mmHg.
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3.7522 mol of F2 is held at 7.25 atm and 770.56 K. What is the volume of its container in liters? Input your answer to the nearest whole number.
By using the ideal gas law to solve this problem and we get the volume of the container is approximately 1383 liters.
What is ideal gas law?
The ideal gas law is a fundamental equation in the study of thermodynamics and describes the behavior of an ideal gas. The ideal gas law relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:
PV = nRT
The ideal gas law assumes that the gas particles have negligible volume and do not interact with each other, except through elastic collisions. While real gases deviate from this ideal behavior at high pressures and low temperatures, the ideal gas law is still a useful approximation for many practical applications.
We can use the ideal gas law to solve this problem:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
First, we need to convert the temperature to Kelvin:
770.56 K = 497.41 °C + 273.15
T = 1043.56 K
Next, we can plug in the values and solve for V:
V = (nRT)/P
V = (3.7522 mol)(0.08206 L·atm/(mol·K))(1043.56 K)/(7.25 atm)
V ≈ 1383 L
Therefore, the volume of the container is approximately 1383 liters.
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If 2.852 mol O2 is reacted with 5.088 mol CO2
2CO + O2 = 2CO2
a. how many moles of CO2 will be formed?
b. How many moles of the excess reactant remains?
According to the stoichiometry of the chemical equation, 5.704 moles of carbon dioxide are formed and 3.704 moles of the excess reactant remains.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
1 mole of oxygen gives 2 moles carbon dioxide thus 2.852 moles of oxygen will give 2×2.852=5.704 moles and moles of excess reactant remaining=5.704-2=3.704 moles.
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Which of the following demonstrates how natural selection can occur within a population?
a)Competition within the population decreases because of unlimited resources
b)The number of organism in the population decreases because of a limited number of births
c)Females choose mates based in the brightness of the coloration of males within the population
d)The organism in the population experience genetic stability with regard to physical traits
Answer:
C. Females choose mates based in the brightness of the coloration of males within the population
Explanation:
Natural selection occurs when individuals with certain genotypes are more likely than individuals with other genotypes to survive and reproduce, and thus to pass on their alleles to the next generation.
What volume of oxygen can be produced from the decomposition of 25 g of aluminum chloride at 28°C in 750 mmHg
Answer:
Therefore, approximately 8.5 mL of chlorine gas can be produced from the decomposition of 25 g of aluminum chloride at 28°C and 750 mmHg.
Explanation:
The decomposition of aluminum chloride will not produce oxygen. Instead, it produces aluminum oxide and chlorine gas. The balanced chemical equation for this reaction is:
2AlCl3(s) → Al2O3(s) + 3Cl2(g)
To determine the volume of chlorine gas produced from the decomposition of 25 g of aluminum chloride, we need to use the ideal gas law, which is PV = nRT, where P is the pressure of the gas in atmospheres, V is the volume of the gas in liters, n is the number of moles of gas, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature of the gas in Kelvin.
First, we need to determine the number of moles of aluminum chloride. The molar mass of AlCl3 is 133.34 g/mol, so:
25 g AlCl3 × (1 mol AlCl3/133.34 g AlCl3) = 0.187 moles AlCl3
According to the balanced chemical equation, 2 moles of AlCl3 will produce 3 moles of Cl2 gas. Therefore, 0.187 moles of AlCl3 will produce:
0.187 moles AlCl3 × (3 moles Cl2/2 moles AlCl3) = 0.2805 moles Cl2
Now we can use the ideal gas law to calculate the volume of Cl2 gas produced. We need to convert the temperature from Celsius to Kelvin by adding 273.15.
PV = nRT
V = nRT/P
V = (0.2805 mol) × (0.0821 L·atm/mol·K) × (301.15 K) / (750 mmHg × 1 atm/760 mmHg)
V = 0.0085 L or 8.5 mL (rounded to two significant figures)
Therefore, approximately 8.5 mL of chlorine gas can be produced from the decomposition of 25 g of aluminum chloride at 28°C and 750 mmHg.
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.75 moles of Lithium Oxide (Li2O) to units of Lithium Oxide (Li2O)
The number of formula units is 4.5 * 10^23 formula units. This was obtained from the number of moles given in the question.
How do you find the number of formula units from the moles?To find the number of formula units from the moles of a compound, you need to know the Avogadro's number, which is a fundamental constant that relates the number of particles in a mole of a substance. Avogadro's number is approximately 6.02 x 10^23 particles per mole.
Once you know the Avogadro's number, you can use the following formula to find the number of formula units:
Number of formula units = number of moles x Avogadro's number
We know that;
1 mole would contain 6.02 * 10^23 formula units
0.75 moles will contain 0.75 * 6.02 * 10^23 /1
= 4.5 * 10^23 formula units
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