Changing the volume of the reaction container for a reaction involving gases, changing the temperature of the system, and changing the concentrations of reactants or products can all disturb a chemical equilibrium.
Correct answer: letter B.Additionally, using a larger container for a reaction in aqueous solution can also cause a shift in the equilibrium.
Chemical equilibrium is a state of balance reached between the forward and reverse reactions in a chemical system. In a chemical equilibrium, the rate of the forward and reverse reactions is equal, and the concentrations of reactants and products remain constant. This is because the rate of the forward reaction is equal to the rate of the reverse reaction, and the system is in a state of dynamic balance.
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When 2.35Mg (OH)2 is added to 250.0mL of water, the temperature of the water raises from 20.5 degrees celsius to 36.0 degrees celsius. Calculate the molar enthalpy of solution
When 2.35Mg (OH)2 is added to 250.0mL of water, the temperature of the water raises from 20.5 degrees Celsius to 36.0 degrees Celsius. The molar enthalpy of solution is 169,493.7.
What is the molar enthalpy ?The term molar enthalpy is defined as the enthalpy of reaction for the formation of one mole of a compound from its constitutive elements in their standard states.
H = m × C × T.
Mass = 2.35Mg
C = 250.0
Temperature = 288.5K
By substituting these values in given equation, we get
H = 2.35 × 250 × 288.5
H = 169,493.7
Thus, the molar enthalpy of solution is 169,493.7.
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Are all neutral atoms of the same element the same?
No, all neutral atoms of the same element are not same. It is also the smallest piece of substance with chemical element-like characteristics.
What is atom?The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.
Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charge around a positive-charged nucleus made up of protons and neutrons. No, all neutral atoms of the same element are not same.
Therefore, no, all neutral atoms of the same element are not same.
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a mixture is made by combining 1.99 lb of salt and 4.88 lb of water. what is the percentage of salt (by mass) in this mixture?
Answer:
29%
Explanation:
1.99 / ( 1.99 + 4.88) x 100% = ~ 29%
In an experiment searching for the photoelectric effect, an incident beam of green light did not eject any electrons from a metal. In order to eject electrons, the experimenter should
Group of answer choices
try red light.
increase the brightness of the green light.
try blue light.
decrease the brightness of the green light.
try a combination of infrared and microwave.
Therefore, the experimenter should use blue light, that has a high number and intensity than green light, instead of red light, to expel electrons in the photographic reaction experiment.
What is the aim of photoelectric?When determining the position (or lack) of an item or the distances here between point and an object, a photodiode sensor is utilized. It has a photodiode receiver as well as a transmitter that emits visible red or infrared light.
What exactly is a photoelectric material?Materials that can produce, transform, transport, process, and store light signals are referred to as optoelectronic materials. mostly semiconductor photoelectric materials are among them.
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You mix 250 ml of 2.1 m hbr with 200 ml of 2.5 m koh . what is the ph of the resulting solution?
When you mix 250 ml of 2.1 m hbr with 200 ml of 2.5 m koh, the resulting solution will have a pH of 13.398 which is slightly basic in nature.
Water and salt are produced when 250 mL of 2.1 mHBR and 200 mL of 2.5 mKOH are combined.
The pH of the final solution can be determined using the amount of hydroxide ions (OH-) generated throughout the process.
The amount of KOH that was added, 2.5 M of OH-, is present in the solution.
The solution's pOH may be computed using the formula -log[OH-], and the pH can be derived by computing the negative logarithm of the hydroxide ion concentration.
The pH in this situation is 14 - 0.602 = 13.398 since the pOH is 0.602 in this case.
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which of these statements about atoms is incorrect? group of answer choices atoms are the smallest visible particles of an element. atoms are composed of protons, neutrons, and electrons. atoms are the building blocks of all matter. the smallest identifiable unit of an element is the atom. there are 91 different naturally occurring atoms.
There are 91 different naturally occurring atoms is incorrect. There are 118 different naturally occurring atoms.
Atoms are unable to exist on their own. The tiniest component of an element, an atom shares the same chemical characteristics as the element as a whole. Atoms, which make up all matter, are unbreakable and indivisible. An atom is the smallest piece of stuff. Protons, electrons, and neutrons are the charge, neutral, and vacuum particles that make up the nucleus of every atom. Protons and electrons both occur in equal numbers in an atom. Because the number of protons and electrons in an atom is always equal, an atom is electrically neutral.
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for each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. compound hydrogen-bonding force name formula or lewis structure between molecules of the compound? between molecules of the compound and molecules of water?
Conclusions about the hydrogen-bonding forces between each compound's molecules:
1. Fluoromethane [tex](CH_3F)[/tex]: Due to the polar covalent connection between the carbon and fluorine atoms, which generates partial positive and negative charges on the molecule, there would be hydrogen-bonding interactions between fluoromethane molecules.
2. N-chloromethylamine [tex](CH_3ClN)[/tex]: The existence of the N-H bond, which can create hydrogen bonds with other N-H or O-H groups, would result in hydrogen-bonding forces between molecules of N-chloromethylamine.
3. Methylamine [tex](CH_3NH_2)[/tex]: The existence of the N-H bond, which can create hydrogen bonds with other N-H or O-H groups, would result in hydrogen-bonding forces between molecules of methylamine.
4. Compound [tex]X_5[/tex]: It is not feasible to identify whether there would be hydrogen-bonding forces between the molecules of the compound or between the molecules of the compound and water without knowing more about the formula or structure of the chemical.
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Which type of pathway produces carbon dioxide and water?
Cellular respiration can occur either anaerobically (without oxygen) or aerobically. Glucose and oxygen interact during aerobic cell respiration. As byproducts, both water and carbon dioxide are produced.
In glycolysis, are CO2 and water produced?In the majority of cells, glycolysis turns glucose into pyruvate, which mitochondrial enzymes then oxidize to produce carbon dioxide and water. However, due to the absence of mitochondria in some platelets, most notably adult red blood mitochondria, glycolysis serves as the only method of ATP synthesis.
What is the carbon dioxide diffusion pathway?The carbon dioxide moves out of the circulation, via the capillaries, and onto the alveoli where it is ejected, while at the same time oxygen bonds with hemoglobin to be transported back to the tissues once the venous returns to the lungs.
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to make up 1 l of a 0.5 m solution of edta starting with the free acid, approximately how much 10 m naoh will have to be added to adjust the ph to 7.0? do you expect this solution to have a ph-buffering capacity? explain.
To make up 1 L of a 0.5 M EDTA solution starting with the free acid, you would need to adjust the pH to 7.0 by adding 10 M NaOH. The amount of NaOH required will depend on the initial pH of the EDTA solution and the desired final pH.
As for whether the solution will have a pH buffering capacity, it depends on the range of the pH buffer. EDTA is a weak polyprotic acid with four dissociation constants, and its buffering capacity will be dependent on the ratio of the protonated to deprotonated form of EDTA at a particular pH.
A pH buffer is typically considered to have buffering capacity over a range of pH values close to the pKa of the buffer. Since the pKa values of the four acetic acid groups on EDTA range from 2.0 to 10.26, it's possible that the solution may have buffering capacity over a broad pH range, but it will depend on the final pH achieved after adding NaOH and the concentration of EDTA in the solution.
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--The given question is incomplete, the complete question is
"To make up 1 l of a 0.5 m solution of EDTA starting with the free acid, approximately how much 10 m NaOH will have to be added to adjust the ph to 7.0? do you expect this solution to have a ph-buffering capacity? the pkas of the four acetic acid groups on edta are 2.0, 2.67, 6.16 and 10.26."--
if one electron in an atom is excited but does not have enough energy to escape, the energy of the excited electron must have one of a set of quantized values.T/F
True. When one electron within any atom gets excited but lacks the energy to leave the nucleus, its energy must fall into one of set of quantized values.
What is an atom?The fundamental unit of chemistry is the atom. It is the lowest portion of matter where electrical charges particles cannot escape. It is also smallest material with properties resembling chemical elements.
What element contains atoms?An atom is a part of an element. In a given element, there is only one kind of atom per atom. The remaining components of an atom are subatomic particles called protons, neutrons, and electrons. The fusion of elements can produce molecules.
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The following data was collected when a reaction was performed experimentally in the laboratory.
Reaction Data
Reactants Products
Al(NO3)3 NaCl NaNO3 AlCl3
Starting Amount in Reaction 4 moles 9 moles ? ?
Determine the maximum amount of NaNO3 that was produced during the experiment. Explain how you determined this amount.
The maximum amount of NaNO3 that was produced during the experiment is 4 moles.
What is an experiment?An experiment is described as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
We determined by using the stoichiometry of the reaction, which states that for every mole of Al(NO3)3 that reacts, 1 mole of NaNO3 is produced.
So because the starting amount of Al(NO3)3 was 4 moles, it follows that the maximum amount of NaNO3 that could be produced is also 4 moles.
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Unfavorable temperatures and ph changes can cause a protein to change shape. this is called ?
Unfavorable temperatures and ph changes that can cause a protein to change shape is called Denaturation.
How would a protein react to a change in pH or temperature?The intrinsic relationships between the protein's amino acids can change if it is exposed to chemicals, changes in pH, or temperature changes, which could then modify how the protein looks.
What is the term for protein denaturation?Proteins lose their biological activity as a result of the helix structure's uncoiling, which also changes their chemistry. Denaturation of proteins refers to the process by which a protein loses its function and the helix structure unravels as a result of physical or chemical modifications.
How much does a change in pH influence protein structure?Variations in pH have an impact on the tertiary level of protein structure because a strongly acidic solution prevents these interactions from occurring.
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a certain ore is 21.5% 21.5 % nickel by mass. how many kilograms of this ore would you need to dig up to have 50.0 g 50.0 g of nickel?
We would need to dig up 0.233 kg of this ore to have 50.0 g of nickel.
To find the amount of ore required to obtain 50.0 g of nickel, we can use the following calculation:
Ore required = (Desired amount of nickel) / (Percentage of nickel in the ore)
First, we need to convert 50.0 g of nickel to kilograms: 50.0 g = 0.050 kg
Next, we'll use the percentage of nickel in the ore:
Ore required = (0.050 kg) / (0.215) = 0.233 kg
So, you would need to dig up 0.233 kg of this ore to have 50.0 g of nickel.
Dimensional analysis is a crucial component of calculations in chemistry since it transforms one unit or quantity into another. You must first determine the conversion factors in order to get the desired unit before doing the conversion. Expressing a given unit to another unit is crucial because some chemistry problems call for conversions to be made before applying a particular equation.
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two beakers each contain 200 ml of water. into one beaker, a student adds 5.0 g naf. into the other, she adds 5.0 g kf. what is the expected effect on the boiling points of the solutions?
The addition of NaF to one beaker of water would result in a decrease in the boiling point of the solution, while the addition of KF to the other beaker would result in an increase in the boiling point of the solution.
Effects of NaF and KF on Boiling Point of WaterAdding NaF (Sodium Fluoride) and KF (Potassium Fluoride) to two separate beakers of water would result in different effects on the boiling point of the solutions. NaF, being a soluble ionic salt, would cause a decrease in the boiling point of the water. This happens because the presence of ions in the solution reduces the strength of the attractive forces between the water molecules, making it easier for them to vaporize at a lower temperature. On the other hand, KF, which is a slightly soluble ionic salt, would result in an increase in the boiling point of the water. This occurs due to the elevation effect of solutes, where the solute particles raise the vapor pressure of the solvent, making it more difficult for the solvent to vaporize. In summary, the boiling point of water can be either raised or lowered depending on the type of ionic salt that is added to it.
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how can you protect your hands when working with corrosive chemicals?
Your hands are shielded by protective gloves while working with corrosive chemical. There are several different types of materials for gloves, including nitrile, natural rubber, and latex.
How can you defend against corrosive chemicals?Additional eye/facial protection, including such goggles or a face shield, should be used when there is a chance of significant splash risks. When handling chemicals that are corrosive, gloves should be worn. In typical laboratory settings, nitrile gloves ought to be adequate for handling the vast of them.
What is corrosive chemical first aid?If a shower is available, take off any contaminated clothing or jewellery and rinse the chemicals away for at least 20 minutes. Keep from getting chemicals in your eyes. Dress the burn. Apply a fresh bandage to the burn.
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one unique characteristic of gyros is that the rotor of a free gyro always points in the same direction no matter which way the base of the gyro is positioned. this is referred to as
The rotor of a free gyro always points in the same direction no matter which way the base of the gyro is positioned. this is referred to as Gyroscopic rigidity.
Gyroscopic stiffness is the force that prevents a gyroscope's orientation from changing. Additionally known as gyroscopic rigidity. This characteristic results from the spinning wheel's angular momentum, which opposes any shift in orientation. In order to maintain a stable path, gyroscopic stiffness is crucial for the operation of huge vehicles like ships, planes, and spacecraft. Other gyroscopic devices and machinery, such compasses and other navigational tools, as well as vibration dampening, make use of gyroscopic stiffness.An instrument used to determine or maintain orientation and angular velocity is a gyroscope. It is a spinning wheel or disc where the spin axis is unrestricted in its orientation choices. According to the law of conservation of angular momentum, while the mounting is rotating or tilting, the orientation of this axis is unchanged.
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Simple diffusion of a molecule down its concentration gradient requires an input of energy to the system.a. Trueb. False
The statement is False. Simple diffusion of a molecule down its concentration gradient requires an input of energy to the system.
In chemistry, concentration is the abundance of a constituent divided by means of the full quantity of a mixture. numerous forms of mathematical description may be distinguished: mass awareness, molar attention, range concentration, and volume concentration. The concentration can discuss with any type of chemical aggregate, However, most regularly refers to solutes and solvents in solutions. The molar (amount) concentration has versions, along with everyday awareness and osmotic awareness.
Concentrations are frequently known as degrees, reflecting the intellectual schema of ranges on the vertical axis of a graph, which can be high or low (for instance, "high serum stages of bilirubin" are concentrations of bilirubin within the blood serum that are extra than normal).
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The correct name for p3o2
The correct name for p3o2 is B. Phosphorus pentoxide.
What is Phosphorus pentoxide?Phosphorus pentoxide (P32O2) is a chemical compound composed of phosphorus and oxygen.
It is a white, crystalline solid that is highly reactive and forms acidic solutions when dissolved in water.
This compound is used in a variety of applications, including as a dehydrating agent, a desiccant, and as a raw material for the production of phosphoric acid and other phosphorus compounds.
In general, Phosphorus pentoxide is a strong oxidizing agent, and it reacts with many organic and inorganic compounds to form new compounds.
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which, if any, of the following nitrogen oxides have the same empirical formula? choose one or more: n2o5 no no2 n2o4 n2o
The same empirical formula can be found in the following nitrogen oxides: N2O5 and NO .The empirical formula of a chemical compound gives the simplest whole-number ratio of the atoms present in a compound. However, it doesn't provide the actual number of atoms present in a molecule.
Among the given nitrogen oxides, the empirical formula of N2O4 and N2O5 is the same, which is N2O. The empirical formula of NO and NO2 is NO, which is different from N2O. The empirical formula of N2O is N2O itself. So, N2O4 and N2O5 are the nitrogen oxides that have the same empirical formula, N2O.
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which of the following are colligative properties? group of answer choices enthalpy of formation boiling point elevation density freezing point depression temperature change osmotic pressure
The four complementary characteristics of colligative properties that a solution can display are an increase in boiling point, a decrease in freezing point, a relative decrease in vapor pressure, and an increase in osmotic pressure.
What are colligative properties?
Some characteristics of diluted solutions containing non-volatile solutes depend only on the quantity of solute particles present and not on the solute type. Collaborative qualities are what these traits are known as. Most frequently, diluted solutions exhibit these characteristics.
Collaborative properties can also be defined as those that result from the dissolution of a non-volatile solute in a volatile solvent. Typically, the solute alters the characteristics of the solvent by removing some of the solvent molecules from the liquid phase. Additionally, the concentration of the solvent is reduced as a result of this.
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The empirical rule tells the approximate percentage of the data which falls into certain ranges. to which distributions does the empirical rule apply?
The Empirical Rule (or 68-95-99.7 Rule) applies to data that follows a normal distribution.
This means that roughly 68% of the data will fall within one standard deviation of the mean, 95% of the data will fall within two standard deviations of the mean, and 99.7% of the data will fall within three standard deviations of the mean.
This means that if you have a normal distribution, you can use the Empirical Rule to predict how much of your data will fall within certain ranges. For example, if you know the mean and standard deviation of your data, you can use the rule to approximate how many of your scores will fall within a certain range. This can be useful for understanding the spread of your data and making predictions about it.
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When ammonium chloride is dissolved in water the solution becomes colder. The change is
Ammonium chloride undergoes an endothermic process when it is dissolved in water. The solution cools as a result. The transformation is hence endothermic.
Ammonium chloride makes water cooler for what reason?Thermal Responses
A beaker would get frigid if ammonium chloride was added and then dissolved in water. This is due to the endothermic nature of the reaction, in which the water-based solvent and its surroundings provide energy for the ammonium chloride to absorb.
In cold water, does ammonium chloride dissolve?An inorganic substance with the formula NH4Cl, ammonium chloride is white, crystalline salt that is very soluble in water.
Why are cold packs made using ammonium chloride?Ammonium chloride, or NH4Cl, is safer to use and also causes a significant temperature drop. 4. When the temperature rises as the sodium carbonate dissolves, your students might be taken aback.
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SOMEONE PLEASE HELP! I WILL REWARD BRAINLIEST IF CORRECT!
A given compound had the following composition: 20.3g mercury and 1.70g oxygen. Find the empirical formula.
To find the empirical formula of the compound, you need to find the ratio of the elements present in the smallest whole numbers. You can do this by dividing each element's mass by its atomic mass and then dividing the result by the smallest ratio found.
For example:
Mercury (Hg) atomic mass = 200.59 g/mol
Oxygen (O) atomic mass = 15.999 g/mol
Hg mass = 20.3 g / 200.59 g/mol = 0.101 mol
O mass = 1.70 g / 15.999 g/mol = 0.106 mol
Dividing the two mole ratios by the smaller ratio (0.106), we get:
Hg = 0.101 / 0.106 = 0.95 (rounded to 1)
O = 0.106 / 0.106 = 1.0
So, the empirical formula of the compound is HgO.
Answer:
HgO
Explanation:
hi how is the earth floating pls i need the answer fast,
Answer: The Earth is "floating" due to the gravity of outer space.
Explanation: Objects with greater mass have greater gravitational pull therefore the Earth floats.
1.4 what will the relative impact be on co2 for heating and for cooling, assuming the buildings in question 1.1 are located in the midwest (hot summers, cold winters)?
The relative impact of heating and cooling on CO2 emissions will depend on the energy source used for heating and cooling.
If the buildings in question are heated using fossil fuels such as natural gas, oil, or coal, the heating will result in significant CO2 emissions. In contrast, if the buildings are heated using clean energy sources such as geothermal, solar, or wind power, the heating will have a minimal impact on CO2 emissions.
For cooling, the primary energy source is often electricity, and the CO2 emissions associated with cooling will depend on the sources of electricity generation. If the electricity is generated from fossil fuels, the cooling will result in significant CO2 emissions. If the electricity is generated from clean energy sources, the cooling will have a minimal impact on CO2 emissions.
In general, the relative impact of heating and cooling on CO2 emissions will vary depending on the energy mix in the region. In the midwest, where the buildings are located, the relative impact of heating and cooling on CO2 emissions will be influenced by the sources of energy used for heating and cooling, as well as the energy mix of the electricity grid in the region.
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What is the total pressure exerted by a mixture containing two gases if the partial pressure of one gas is 70 torr and the partial pressure of the other gas is 30 torr?
The total pressure exerted by a mixture containing two gases is 100 torr.
The sum of the partial pressures of each gas makes up the total pressure exerted by two gases.
In this instance,
The sum of the partial pressures of the first and second gases is the total pressure.
=30+70=100 torr
The overall pressure exerted by a mixture of gases is equal to the sum of the partial pressures exerted by each individual gas in the mixture, according to the gas law known as Dalton's law of partial pressures.
The thermodynamic activity of a gas's molecules is gauged by its partial pressure. In contrast to their concentrations in gas mixtures, gases dissolve, diffuse, and respond according to their partial pressures.
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graphene is a special form of carbon bonded into a flat sheet that is only one atom thick. what is the bonding type between individual graphene sheets?
Graphene is a single layer of carbon atoms arranged in a hexagonal lattice pattern. The individual carbon atoms in graphene are bonded to each other through strong covalent bonds.
The bonding type between individual graphene sheets is called van der Waals interactions. These interactions are weak, non-covalent bonds that result from the attraction between the positively charged nucleus of one atom and the negatively charged electrons of another atom.
In the case of graphene, the van der Waals interactions between adjacent graphene sheets are strong enough to hold the layers together, but weak enough to allow for easy separation. This combination of strong covalent bonding within each graphene layer and weak van der Waals interactions between layers makes graphene an ideal material for use in applications such as flexible electronics, energy storage, and water filtration.
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6. Based on Reference Table F, which
salt is the most soluble?
(1) Agl
(2) AgBr
(3) ZnCO3
(4) K₂SO4
6
Answer:
Explanation:
Of the options listed, K2SO4 (Potassium sulfate) is the most soluble.
which is an example of a homogeneous mixture? group of answer choices soil (dust) vodka oily water sodium chloride aluminum
An example of a homogeneous mixture is vodka. Mixtures that are homogeneous have the same structure or composition.
Which substance is a mixture that is homogeneous *?A mixture with a uniform composition throughout is known as a homogeneous mixture. Because the dissolved salt is evenly distributed throughout the entire salt water sample, the above-described salt water is homogeneous.
Which of the following is an example of pure water in a homogeneous mixture?Homogeneous Compound: Mixtures are formed when substances do not chemically bond. Pure water (H2O H 2 O) is an example of a compound that is homogeneous. The oxygen forms a bond with the hydrogen. Another example of a homogeneous compound is carbon dioxide.
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2H2+O2 - 2H2
What will be the volume of water vapor produced when 8 grams of H2 reacts at STP
2H₂ + O₂ ⇒ 2H₂ for this reaction the volume of water vapor produced when 8 grams of H₂ reacts at STP is 179.2 Litre.
What do you mean by STP ?The standard temperature and pressure (STP) adverts to the nominal conditions in the atmosphere at sea level. These conditions are 0 degrees Celsius and 1 atmosphere (atm) of pressure.
The formula for STP can be represented as, VP = nRT.
"P" is pressure, "V" is volume, n is the number of moles of a gas, "R" is the molar gas constant and "T" is temperature.
Given:
Number of mole = 8 grams
8 g of hydrogen = 8 × 1
= 8 mol.
At STP 1 mole H₂ occupies 22.4 L volume.
Therefore, 8 moles of hydrogen occupy = 8 × 22.4
= 179.2 L.
Thus, the volume of water vapor produced when 8 grams of H₂ reacts at STP is 179.2 Litre.
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