a rigid container holds hydrogen gas at a pressure of 3.4 atmatm and a temperature of 50 ∘c∘c. part a what will the pressure be if the temperature is lowered to -50 ∘c∘c ? express your answer with the appropriate units. p2p2
Answers
If the temperature of the hydrogen gas in the rigid container is lowered to -50 °C, the pressure will decrease. The exact value of the pressure can be calculated using the appropriate gas law equation.
To determine the pressure of the hydrogen gas when the temperature is lowered to -50 °C, we can use the ideal gas law, which states that the pressure (P), volume (V), and temperature (T) of a gas are related by the equation PV = nRT, where n is the number of moles of the gas and R is the ideal gas constant.
In this case, we have a rigid container, which means the volume remains constant. Therefore, we can rewrite the equation as P₁/T₁ = P₂/T₂, where P₁ and T₁ are the initial pressure and temperature, and P₂ and T₂ are the final pressure and temperature.
Given that the initial pressure (P₁) is 3.4 atm and the initial temperature (T₁) is 50 °C, we need to convert the temperatures to Kelvin by adding 273.15 to each value. Thus, T₁ = 50 + 273.15 = 323.15 K.
The final temperature (T₂) is -50 °C, which in Kelvin is T₂ = -50 + 273.15 = 223.15 K.
Now we can solve for P₂ by rearranging the equation:
P₂ = (P₁ * T₂) / T₁
Substituting the known values, we get:
P₂ = (3.4 atm * 223.15 K) / 323.15 K
Calculating this expression gives us the value of P₂, which represents the pressure of the hydrogen gas when the temperature is lowered to -50 °C.
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Related Questions
citric acid molecules are polar, as are water molecules, therefore they dissolve the polar molecules in the orange. french fries, however, contain grease which is made up of non-polar molecules which can not be dissolved with the polar molecules of water and is why grease is not washed away with just plain water. because soap contains both polar and nonpolar molecules, the polar end is attracted to the water molecules while the nonpolar end is attracted to the grease. the soap is then able to interact with the water and grease to cleanse the hands.
Answers
Citric acid and water are both polar molecules and dissolve polar molecules in orange juice, whereas grease in French fries is made up of nonpolar molecules that cannot be dissolved in water. Soap contains both polar and nonpolar molecules, allowing it to interact with both water and grease to cleanse hands.
Citric acid, which is found in oranges, is a polar molecule due to its asymmetric molecular structure that contains polar functional groups such as carboxylic acid and hydroxyl groups. Similarly, water molecules are polar due to their bent shape and the polarity of the oxygen-hydrogen bond. When combined, the polar molecules of citric acid and water are able to dissolve other polar molecules in the orange juice, such as sugar.
In contrast, grease is made up of nonpolar molecules, such as long-chain hydrocarbons, which cannot be dissolved in water due to the polar nature of water molecules. This is why washing hands with plain water is not effective in removing grease from the skin. However, soap contains both polar and nonpolar molecules, allowing it to interact with both water and grease. The polar end of the soap molecule is attracted to the water molecules, while the nonpolar end is attracted to the grease, allowing it to remove grease from the skin when washing hands.
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Need help labeling the potential energy diagram.
Answers
The labelled diagram of the potential energy has been attached below. Activation energy determines the rate of reaction.
What is activation complex?In chemistry, the activated complex is a temporary, unstable arrangement of atoms that forms at the highest point in the energy profile of a chemical reaction. It represents the transition state between the reactants and the products, where the bonds of the reactants are partially broken and the bonds of the products are partially formed. The activated complex is also known as the transition state or the activated state, and it has a higher energy than both the reactants and the products. The activation energy required to reach the activated complex determines the rate of the reaction.
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can yall please help answer these two ?
Answers
Answer:
19) Refraction will be the answer.
20) Diffuse reflection will be the answer.
Diffuse refraction
I need help with number 3
the equation is 4Al+3O2=2Al2O3
Answers
the two factors that combine to keep the planets in orbit are-
A.gravity and orbital speed
B.orbital speed and mass
C.mass and inertia
D.gravity and inertia
Answers
Answer:
D. Gravity and inertia
When it happens orbital motion occurs
expressthereactioninwhichethanolisconvertedto acetaldehyde (propanal) by nad in the presence of alcohol dehydrogenase as the difference of two half-reactions and write the corresponding reaction quotients for each half-reaction and the overall reaction.
Answers
The conversion of ethanol to acetaldehyde (propanal) by NAD+ in the presence of alcohol dehydrogenase can be expressed as the difference of two half-reactions.
One half-reaction involves the oxidation of ethanol to acetaldehyde, while the other half-reaction involves the reduction of NAD+ to NADH. The corresponding reaction quotients can be calculated for each half-reaction, as well as for the overall reaction.
Explanation:
The half-reactions can be written as follows:
Oxidation of ethanol:
CH3CH2OH + NAD+ -> CH3CHO + NADH + H+
Reduction of NAD+:
NAD+ + 2H+ + 2e- -> NADH
To calculate the reaction quotients for each half-reaction, we need to consider the concentrations of the reactants and products. The reaction quotient for a given half-reaction is the ratio of the product concentrations to the reactant concentrations, raised to the power of their stoichiometric coefficients.
For the oxidation of ethanol half-reaction, the reaction quotient can be written as:
Q1 = [CH3CHO][NADH][H+] / [CH3CH2OH][NAD+]
For the reduction of NAD+ half-reaction, the reaction quotient can be written as:
Q2 = [NADH] / [NAD+][H+]^2
The overall reaction quotient (Q) for the complete reaction is calculated by taking the ratio of the product concentrations to the reactant concentrations, raised to the power of their respective stoichiometric coefficients. In this case, since the two half-reactions are subtracted, the reaction quotient is given by:
Q = Q1 / Q2
The reaction quotients provide a measure of the relative concentrations of the species involved in the reactions and can be used to determine the direction and extent of the reaction.
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he ______ is the depth in the ocean at which calcareous skeletal material first begins to dissolve. Multiple choice question.
Answers
Answer: lysocline
Explanation:
Lysocline is the depth in the ocean at which calcareous skeletal material first begins to dissolve. It is the depth of the ocean whereby the dissolution rate of calcite has a dramatic rise.
Lysocline is also referred to as the transition zone upper bound where the CaCO3 content drops.
Given: sulfur, 3.04 g, 1.47 cm³
Wanted: density of sulfur in g/cm³?
Answers
Answer:
2.068
Explanation:
D = M/V
3.04 /1.47
= 2.068
HELP
Combustion Reactions : Fuel +O2 (g)->CO2 (g) +H2O(g)
Hexane , C6H14(l) oxygen ( g ) ->carbon dioxide ( g ) water ( g )
Answers
Combustion reactions involve the oxidation of a fuel by oxygen gas to produce carbon dioxide and water.
Combustion reactionsC6H14 (l) + 15O2 (g) -> 6CO2 (g) + 7H2O (g).In the case of hexane (C6H14), the combustion reaction is C6H14(l) + 9O2(g) -> 6CO2(g) + 7H2O(g).The hexane is oxidized by the oxygen to form six molecules of carbon dioxide and seven molecules of water.The hexane is the fuel, while the oxygen is the oxidizing agent.The reaction is exothermic and releases a large amount of energy.This energy is typically used to do work, such as heating and powering engines.Combustion reactions are important for producing energy in the form of heat, light, and motion, and are also necessary for the production of many of the materials used in everyday life.Combustion reactions involve the burning of a fuel with oxygen to produce carbon dioxide and water. In the combustion of hexane, C6H14(l), the hydrocarbon reacts with oxygen gas (O2) to produce carbon dioxide gas (CO2) and water vapor (H2O). The balanced chemical equation for this reaction is:2 C6H14(l) + 19 O2(g) -> 12 CO2(g) + 14 H2O(g).
The reaction is exothermic, meaning that heat is released when the reaction takes place. This heat helps to further break down the molecules of hexane, allowing the reaction to proceed. The reaction can be thought of as a combination of oxidation and combustion. The oxygen molecules oxidize the carbon atoms in the hexane, causing them to break down and bind to the oxygen molecules. The result is the production of carbon dioxide and water, the products of combustion. The reaction also produces large amounts of energy, which is released in the form of heat and light.To learn more about Combustion reactions refer to:
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when do you use the roman numerals when naming ionic compounds
Answers
Oxidation State
In chemistry, when naming ionic compounds there will sometimes be a roman numeral after the first element. This number represents the oxidation state of the element. An oxidation state is defined as the hypothetical charge of an atom, assuming that all of its bonds are fully ionic. In other words, the oxidation state shows how many electrons an atom gives or receives after ionization.
In ionic compounds, there will only ever be a roman numeral after the first element. This element will always be the cation (positively charged ion). So, the roman numeral will show how many electrons each cation gave.
When Roman Numerals are Necessary
This is necessary when you deal with transition metals or any other element that has multiple oxidation states. For example, iron can give 2 or 3 electrons. So, when naming a compound with iron you need to use a (II) or (III) to show how many electrons each iron atom gave.
When Roman Numerals are Unnecessary
On the other hand, roman numerals are unnecessary when using an element that only has one possible oxidation state. For example, Na can only give 1 electron ever, so it does not need a roman numeral. Additionally, elements in the second group like Mg can only ever give 2 electrons, so they also don't need a roman numeral to follow their name.
How many grams of Fe2O3 will be produced from 37.5 moles of iron?
Answers
37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.
To determine the number of grams of Fe₂O₃ produced from 37.5 moles of iron (Fe), we need to use the balanced chemical equation for the reaction in which iron reacts to form Fe₂O₃.
The balanced equation for the reaction is:
4Fe + 3O₂ -> 2Fe₂O₃
From the balanced equation, we can see that 4 moles of iron react to produce 2 moles of Fe₂O₃. This means that the molar ratio between Fe and Fe₂O₃ is 4:2 or 2:1.
Now, we can set up a simple proportion to calculate the number of moles of Fe₂O₃ produced:
(37.5 moles Fe) * (2 moles Fe₂O₃ / 4 moles Fe) = 18.75 moles Fe2O3
So, 37.5 moles of iron will produce 18.75 moles of Fe₂O₃.
To convert moles to grams, we need to use the molar mass of Fe₂O₃. The molar mass of Fe₂O₃ can be calculated by adding the atomic masses of iron (Fe) and oxygen (O) in the compound:
(2 x atomic mass of Fe) + (3 x atomic mass of O) = (2 x 55.845 g/mol) + (3 x 16.00 g/mol) = 159.69 g/mol
Now, we can calculate the mass of Fe₂O₃ produced:
Mass = moles x molar mass
Mass = 18.75 moles x 159.69 g/mol = 2990.31 grams
Therefore, 37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.
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Drag each label to the correct location in the equation. Not all tiles will be used. The density of mercury is 13. 6 grams per cubic centimeter. Complete the steps for converting 13. 6 g/cm3 to kg/m3. (1 kg = 1,000 g, 1 m3 = 106 cm3).
Answers
The Complete the steps for converting the density of mercury is
13.6 g x 1 Kg x 10⁶ cm³ = 13600Kg
cm³ 1000g m³
the method of changing 13.6 g/cm3 to kg/m3
A kilogram is equal to one thousand grams.
Consequently, it may be written as
1 Kg = 1000g
1g = 1kg
1000
Therefore, 1 kg will be entered into the first blank (numerator).
Currently, 100 centimeters make up 1 meter.
Thus,
1 m³ = (100)³ cm³
1cm³ = 1m³
10⁶
so the second blank (numerator). will be filled with 10⁶
Additionally, the third blank will be filled with 1 m³
And 13600 will be the final blank.
The final equation will look like this:
13.6 g x 1 Kg x 10⁶ cm³ = 13600Kg
cm³ 1000g m³
Your question is incomplete but most probably your full question attached below
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The volume of sample nitrogen gas at s.t.p is 1120cm^3. Calculate the mass and number of molecules of nitrogen gas in the sample.
Answers
The mass of nitrogen gas in the sample is 0.001355 g and the number of molecules of nitrogen gas in the sample is 2.91 x 10¹⁹ molecules.
At STP (Standard Temperature and Pressure), the temperature is 0°C (273.15 K) and the pressure is 1 atm (101.325 kPa).
Ideal gas law is: PV = nRT
Where P will be the pressure, V will be the volume, n is number of moles, R is the ideal gas constant, and T will be the temperature.
At STP, the value of R is 0.0821 L·atm/mol·K.
The volume of the nitrogen gas sample is 1120 cm³, which is equivalent to 0.00112 m³.
Using the ideal gas law;
n = PV/RT
n = (1 atm) x (0.00112 m³) / (0.0821 L·atm/mol·K x 273.15 K)
n = 0.0000483 moles of nitrogen gas
To calculate the mass of nitrogen gas, we use the molar mass of nitrogen, which is 28.02 g/mol.
Mass of nitrogen gas = n x molar mass
Mass of nitrogen gas = 0.0000483 moles x 28.02 g/mol
Mass of nitrogen gas = 0.001355 g
To calculate the number of molecules of nitrogen gas in the sample, we use Avogadro's number, which is 6.022 x 10²³ molecules/mol.
Number of molecules of nitrogen gas = n x Avogadro's number
Number of molecules of nitrogen gas = 0.0000483 moles x 6.022 x 10²³ molecules/mol
Number of molecules of nitrogen gas = 2.91 x 10¹⁹ molecules
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Compare a mixture and a compound. How are they alike?
Contrast a mixture and a compound. How are they different?
Answers
Answer:
gnzl8303
gnzl8303vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
Explanation:
Answer:
how they are alike: Both compound and mixture are combined in a definite ratio or in any proportion. Both compound and mixture consist of two or more substances/elements. Both compounds and mixtures have physical and chemical properties.
how they are different: The chemical composition of compounds is always fixed. A mixture can have a variable composition of the substances forming it. Mixtures can either be homogeneous or heterogeneous in nature. The constituents of a compound can only be separated by either chemical or electrochemical methods (like extraction).
Explanation:
Question 104
The final rinse water temperature of a heat sanitizing warewashing machine should cause the surface of the dishes and utensils to reach which temp?
a. 180F
b. 160F
c. 175F
d. 210F
Answers
The right response is a. 180F. In order to guarantee that the surface of the dishes and utensils reaches a temperature high enough to properly sanitise them, the final rinse water temperature of a heat sanitising warewashing machine should be at least 180F (82C). This is based on the FDA Food Code's criteria.
Water used to rinse or clean items like dishes or clothing is referred to as rinse water. To get rid of any last bits of dirt, soap, or other cleaning agents from the item being cleaned, it is frequently used as the last step in a cleaning procedure. Depending on the item being cleaned and the cleaning product being used, the rinse water might be either cold or warm. Rinse water can occasionally be recycled, such as when washing many loads of dishes or clothing, but it must still be sufficiently clean to be effective. It's crucial to properly dispose of wasted rinse water to prevent water sources from being contaminated.
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A partir de los siguientes números atómicos (Z) determina la configuración electrónica de cada uno de ellos junto con la gráfica de distribución de electrones de cada elemento químico
1. Z= 33
2. Z= 18
3. Z= 25
Answers
Match the provided labels to the appropriate point on the titration curve Buffering region 14 12 10 Excess titrant point 6 4 2 Volume of strong base (mb Part 2 (1 point) O See Hint Use the titration curve for the weak acid to calculate the pH of a 0.15 Msolution of that weak acid. Enter your answer with two significant figures. Round the pKa to the nearest whole number for the calculation, and use two significant figures for your final answer.
Answers
To match the provided labels to the appropriate point on the titration curve:
- Buffering region: 10
- Excess titrant point: 2
- Volume of strong base (mb): 6
As for the second question, to calculate the pH of a 0.15 M solution of a weak acid using the titration curve, we first need to determine the pKa of the acid. We can do this by finding the halfway point of the buffering region on the curve, which is at pH 4. This corresponds to a 50/50 mix of the weak acid and its conjugate base, which means that the pKa is equal to the pH.
So, the pKa of the weak acid is 4. We can then use the Henderson-Hasselbalch equation to find the pH of the 0.15 M solution:
pH = pKa + log([A-]/[HA])
We know that [HA] = 0.15 M, and [A-] = 0.85 M (since the solution is 85% conjugate base after the acid has been completely ionized). Plugging these values into the equation, we get:
pH = 4 + log(0.85/0.15) = 3.2 (rounded to two significant figures)
Therefore, the pH of the 0.15 M solution of the weak acid is 3.2.
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I know this is a lot to ask for but please help me!!
Answers
2) Mitochondria
3) developed country
4) metabolic process
5) cellular respiration
6) poverty
7) overpopulation
8) standard of living
Can you please describe 3 ways that are used to help eliminate a deception
Answers
Answer:
Explanation:
A story of self-deception, a story about deceiving others, and a story about accidental deception.
What mass of water in kg must evaporate in order for the person's body temperature to remain constant? use the enthalpy of vaporization of water at 298k is 44. 016 kj mol-1
Answers
The mass of water in kg must evaporate in order for the person's body temperature to remain constant is 0.0243 kg.
Internal energy, which emerges from the molecular state of motion of matter, is an energy form inherent in all systems. Internal energy is represented by the symbol U, and the unit of measurement is the joule (J).
Let mass of the body be x
We have,
enthalpy = 44.016 kj mol-1
Temperature be 298 K
As ideal gas,
Δ = 44.016 - x/18 x 8.314 x 10⁻³ x 298 K
40.66 = 44.016 - x/18
-3.356 x 10³/8.314 x 298 = x/18
-1.35 = x/18
x = 24.3 g
So the amount of water be 0.0243 kg.
Internal energy increases when temperature rises and states or phases transition from solid to liquid and liquid to gas. Planetary bodies can be viewed as hybrids of heat reservoirs and heat engines. Internal energy E is stored in the heat reservoirs, and heat engines transform some of this thermal energy into mechanical, electrical, and chemical energies.
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If the absorbance of the 200 μm solution is 0. 885, what should be the absorbance of the 25μm? write answer to three decimal places
Answers
If the absorbance of the 200 μm solution is 0. 885, then the absorbance of the 25μm is 0.221.
What is absorbance?Absorbance (A) is also known by the optical density (OD).
Absorbance is the capacity of a solution to absorb quantity of light.
And Transmittance is the quantity of light which is passes through a solution.
As we know that,
Absorbance / Concentration = Constant
That means, absorbance is directly proportional to the concentration
Therefore,
0.885/ 200 μm = x / 25 ,
where,
x is the absorbance at 25μm.
Calculating all values, we get
X = 25( 0.885/ 200 ) = 0.221
Thus, we calculated that the absorbance of the 200 μm solution is 0. 885, then the absorbance of the 25μm is 0.221.
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What is the simple definition of amino acid?
Answers
Answer: An amino acid is a type of organic compound that serves as the building blocks of proteins. It contains an amino group (-NH2) and a carboxyl group (-COOH), both attached to the same carbon atom, along with a side chain group that is specific to each amino acid. There are 20 different types of amino acids that can be found in nature, and they are essential for many biological processes, including the synthesis of proteins, enzymes, hormones, and neurotransmitters.
Explanation:
True/False: Energy can’t be created or destroyed: it can only be transferred from one place to another.
Answers
Answer:
true
Explanation:
Answer:
True.
Explanation:
It is true that energy cannot be made or lost, but it can move. For example, if you touch a metal pole and get a static shock, then the energy from the pole is being transferred to you. However, energy was not made or lost in the process. So, energy cannot be made or destroyed, but it can be moved. This also means there was the same amount of energy in the universe as there was millions of years ago. Hope this helps!
Why does sugar dissolve
Answers
Answer:
Sugar dissolves because energy is given off when the slightly polar sucrose molecules form intermolecular bonds with the polar water molecules.
Explanation:
Help me ASAP !!!!!!!!!!!
Answers
Answer:
What do you need help on
Explanation:
If the radius of a rhenium atom is 0.137 nm, what is the pd of the (0001) plane for rhenium in m-2?
Answers
The planar density (pd) of the (0001) plane for rhenium is approximately 2.92 x\(10^1^4\)atoms per square meter.
The planar density (pd) refers to the number of atoms present in a specific crystallographic plane per unit area. To calculate the pd of the (0001) plane for rhenium, we need to consider the atomic radius and the crystal structure of rhenium.
Rhenium belongs to the hexagonal close-packed (HCP) crystal structure. In an HCP structure, each atom is surrounded by six neighboring atoms in a close-packed arrangement. The (0001) plane represents one of the close-packed planes in the HCP structure.
To calculate the pd, we can use the formula:
pd = (2 / √3) * (N / A),
where N is the number of atoms in a unit cell and A is the area of the (0001) plane.
In an HCP structure, the number of atoms in a unit cell is 6, and the area of the (0001) plane can be calculated by multiplying the side length (a) of the unit cell by the height (h) of the (0001) plane. Since the (0001) plane is perpendicular to the c-axis, the height of the (0001) plane is equal to the c-axis length (c) of the unit cell.
Given the atomic radius of rhenium as 0.137 nm, we can determine the side length (a) and the c-axis length (c) using the relationship between the atomic radius and the lattice parameters of the HCP structure.
By substituting the values into the formula and performing the calculations, we find that the pd of the (0001) plane for rhenium is approximately 2.92 x\(10^1^4\) atoms per square meter.
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Which statement describes the reaction involved in cellular respiration?
A. Sugar is produced and stored until it is needed for energy.
B. CO2 is removed from the atmosphere, and O2 is released into the
atmosphere.
C. It is a redox reaction in which energy is released to ATP molecules.
D. O2 is removed from the atmosphere, and CO2 is released into the
atmosphere.
Answers
Answer:
C
Explanation:
Cellular respiration is the metabolic process and is a reduction-oxidation reaction that yields ATP molecules. Thus, option C is accurate.
What is cellular respiration?It is a redox reaction that utilizes glucose and oxygen molecules to release carbon dioxide and energy in the form of ATP. This energy released is used to drive the functions and roles of the cells.
The food molecule, glucose is broken in the presence of the oxygen molecule to release the carbon dioxide and the energy from the cells that are in the form of adenosine triphosphate molecule.
Therefore, option C. cellular respiration is a redox reaction is correct.
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154.42g of oxygen gas (O2) react with an excess of ethane (C2H6) produces how many moles of water vapor (H20)?
Answers
For every 60 grammes of ethane, 108 grammes of water are produced. We therefore obtain 10.8 g of water from the combustion of 6 g of ethane. As a result, is created in 0.6 moles.
How are moles determined when vapour pressure is involved?The mole fraction of the solvent must be multiplied by the partial pressure of the solvent in order to determine an ideal solution's vapour pressure. The vapour pressure would be 2.7 mmHg, for example, if the mole fraction is 0.3 and the partial pressure is 9 mmHg.
One mol of the solute is contained in one thousand grammes of the solvent (water) in a one molal solution. It follows that the solution's vapour pressure is 12.08 kPa.
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what should i buy from target.i was given 100 dollars. serious answers only!
Answers
Answer:
save it for future references
Explanation:
Answer:
some clothes or maybe even some makeup
A lump of zinc is tossed into a beaker of 500L of 14M hydrochloric acid. this reaction produces Hydrogen Gas and zinc (II) chloride. If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, what is the mass of the zinc?
Answers
If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .
Using the ideal gas law equation:
PV = nRT
n = (PV) / (RT)
= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)
= 42.71 moles
the balanced equation for the reaction between zinc and hydrochloric acid:
Zn + 2HCl -> \(ZnCl_{2}\) + \(H_{2}\)
1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.
The molar mass of zinc is 65.38 g/mol.
Mass of zinc = moles of zinc * molar mass of zinc
= 42.71 moles * 65.38 g/mol
= 2796.96 g
Therefore, the mass of the zinc is 2796.96 grams.
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