when 11.2 grams of ethane(g) react with excess oxygen(g), ______ kj of energy are ___.
Answers
When 11.2 grams of ethane (g) react with excess oxygen (g), 805.3 kJ of energy is liberated.
What is the meaning of energy?
Energy is defined as the ability to work or cause a change. When a substance is broken down, energy is released or absorbed. Enthalpy is used to represent the amount of energy that a substance contains or releases during a reaction.
Ethane and Oxygen react to form Carbon dioxide and Water.
Determining the energy released during the reaction:
The given balanced equation for this reaction is:
2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g)
Here, the energy change is expressed as ΔHc° = -1560 KJ mol⁻¹Step-by-step explanation for the given problem:Given: 11.2 grams of ethane(g) reacts with excess oxygen(g)
It is given that the energy change when 2 moles of C2H6 react with 7 moles of O2, ΔHc° = -1560. KJ mol⁻¹
So, the energy liberated when 1 mole of C2H6 reacts with 7/2 moles of O2 will be equal to:ΔHc° = -1560 / 2 = -780. KJ mol⁻¹The given mass of ethane is 11.2 g.
Molar mass of ethane = 2 × 12.01 + 6 × 1.01 = 30.07 g/mol
The moles of ethane that will react is given by:
n = mass / molar mass
n = 11.2 / 30.07 = 0.372 mol
As per the balanced equation, 2 moles of C2H6 react with 7 moles of O2.
So, the moles of O2 required to react with 0.372 moles of C2H6 will be equal to:mol of O2 required = 7/2 × n = 7/2 × 0.372 = 1.297 mol
So, we can conclude that when 11.2 grams of ethane(g) react with excess oxygen(g), -805.3 kj of energy is liberated.
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Related Questions
high quality charcoal that is light weight and easily broken is made from ______. multiple choice question.
Answers
High quality charcoal that is lightweight and easily broken is made from hardwoods such as oak, maple, and hickory.
Charcoal is a porous, black, carbon-rich material that is produced by heating organic matter (such as wood or coconut shells) in the absence of air. The quality of charcoal can vary depending on the type of organic matter used, as well as the production method.
High quality charcoal that is lightweight and easily broken is typically made from hardwoods such as oak, maple, and hickory. These woods have a high density and a low moisture content, which makes them ideal for producing charcoal with a high carbon content and low ash content. In addition, the heating process used to produce this type of charcoal is typically done at high temperatures for a short period of time, which helps to remove impurities and create a more porous and lightweight material.
Overall, the type of organic matter used and the production method are important factors in determining the quality of charcoal, with hardwoods being a common choice for producing high quality charcoal that is lightweight and easily broken.
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Which of the following is a chemical change?
A. Water vapor in the air turns to liquid water in the form of rain
B. The oxygen in the air forms ozone in presence of UV rays
C. Dust and soot particles being suspended in the air
D. Sulphur dioxide being released in the air
Answers
Answer:
It would be B)
Explanation:
It wont be C because nothing is happening its just being released, but in B its being changed by the UV rays. So this is a chemical change or looks like the best answer out of all these
What is the equilibrium? Does the safe's owner believe the thug's threat? Does the safe's owner open the safe? What is the subgame perfect Nash equilibrium? A. The Nash equilibrium is for the owner to open the safe and for the thug to only kill if the owner does not open the safe. B. The Nash equilibrium is for the owner to open the safe and for the thug to kill regardless of whether the owner opens the safe. C. The Nash equilibrium is for the owner to not open the safe and for the thug to only kill if the owner does not open the safe. D. The game does not have a Nash equilibrium. E. The Nash equilibrium is for the owner to open the safe and for the thug to not kill regardless of whether the owner opens the safe.
Answers
The thug will only murder if the owner opens the safe, according to the Nash equilibrium, which calls for the owner to do so. The game lacks a Nash equilibrium.
What exactly is equilibrium?Chemical equilibrium refers to the situation in a chemical process where both the reagents are present at levels that have no additional tendency to change over time, preventing any discernible change in the system's properties.
What elements influence equilibrium?The system's heat, pressure, and concentration all have an impact on equilibrium. The game's equilibrium is disturbed when one these possible unintentional, and it adjusts until it finds equilibrium once more.
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When an object that is made of magnetic material but is not a magnet comes in contact with a magnet _____. PLS ANSWER FAST
Answers
Answer:
Magnetic domains fall into alignment and it begins to attract other objects.
A sample of certain gas have Volume of 1.25 L ATM _125 degree Celsius and5.0 ATM the gas is compressed 50.0 ATM a volume of 325 mL. what is final temperature?
Answers
The final temperature of the gas is approximately 40.96 Kelvin.
To determine the final temperature of the gas, we can use the ideal gas law, which states:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles of the gas, R is the ideal gas constant, and T is the temperature in Kelvin.
First, let's convert the given temperatures to Kelvin. We have:
Initial temperature: -125 degrees Celsius = 148 K (approximate)
Final temperature: Unknown
The initial conditions of the gas are as follows:
Initial pressure (P1) = 1.25 atm
Initial volume (V1) = 1250 mL = 1.25 L (since 1 L = 1000 mL)
Initial temperature (T1) = 148 K
The final conditions of the gas are as follows:
Final pressure (P2) = 50.0 atm
Final volume (V2) = 325 mL = 0.325 L
Final temperature (T2) = Unknown
Using the ideal gas law, we can set up the following equation:
(P1 * V1) / T1 = (P2 * V2) / T2
Substituting the known values:
(1.25 atm * 1.25 L) / 148 K = (50.0 atm * 0.325 L) / T2
Simplifying the equation:
T2 = (50.0 atm * 0.325 L * 148 K) / (1.25 atm * 1.25 L)
T2 = 40.96 K
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1. Calculate the number of moles present in 40g of sodium
hydroxide (NaOH)
Answers
Answer:
1 mole
Explanation:
No of moles=mass/molar mass
molar mass=23+1+16=40
No of moles=40/40
No of moles=1
. Sodium hydroxide is added drop by drop to some hydrochloric acid in a beaker. Which of the following occurs in the beaker? .
Answers
Answer:
Table salt+water
Explanation:
When hydrochloric acid and sodium hydroxide interact it results in the formation of salt and a release of heat. The result of these 2 highly aggressive compounds is table salt and water. (Compounds that are ultimately harmless, even beneficial to us human beings)
Hope i helped
A cylinder, with a piston pressing down with a constant pressure, is filled with 2.10 moles of a gas (n1), and its volume is 46.0 L (V1). If 0.700 mole of gas leak out, and the pressure and temperature remain the same, what is the final volume of the gas inside the cylinder?
Answers
Answer:
The volume is \(V_2 =15.33 \ L\)
Explanation:
From the question we are told that
The number of moles of the gas is \(n_1 = 2.10 \ moles\)
The volume of the gas is \(V = 46.0 \ L\)
The of moles of the gas that leaked is \(n_2 = 0.700 \ mol\)
Generally from the ideal gas law
\(PV = nRT\)
Generally at constant pressure and temperature
\(\frac{V}{n} = constant\)
So \(\frac{V_1 }{n_1} = \frac{V_2 }{n_2}\)
=> \(V_2 = \frac{ V_1 * n_2 }{ n_1}\)
=> \(V_2 = \frac{ 46.0 * 0.700 }{ 2.10 }\)
=> \(V_2 =15.33 \ L\)
Questions 7-10 refer to the following types of energy. (A) Activation energy (B) Free energy (C) Ionization energy (D) Kinetic energy (E) Lattice energy 7. The energy required to convert a ground-state atom in the gas phase to a gaseous positive ion __________ 8. The energy change that occurs in the conversion of an ionic solid to widely separated gaseous ions ___________ 9. The energy in a chemical or physical change that is available to do useful work ___________ 10. The energy required to form the transition state in a chemical reaction ___________
Answers
Answer:
7. Ionization energy
8. Lattice energy
9. Free energy
10. Activation energy
Explanation:
I. Ionization energy: The energy required to convert a ground-state atom in the gas phase to a gaseous positive ion. Thus, it is the minimum energy required to remove or detach an electron from a neutral atom in a gaseous state. Generally, atoms with relatively large atomic radii tend to have a low ionization energy.
II. Lattice energy: The energy change that occurs in the conversion of an ionic solid to widely separated gaseous ions. This ultimately implies that, it is the energy generated during the conversion of an ionic solid into gaseous ions and as such is a measure of the cohesive force binding the ions of an ionic compound using the Born-Haber cycle.
III. Free energy: the energy in a chemical or physical change that is available to do useful work. Thus, it is a thermodynamic quantity that measures the maximum capacity of a system to do work at constant temperature and pressure.
IV. Activation energy: The energy required to form the transition state in a chemical reaction. When the activation energy of a reaction is low, the rate of the reaction would be faster. Therefore, an enzyme speeds or catalyzes the rate of a reaction by lowering its activation energy.
what is the percent ionization of a 0.337 m hf solution? ka of hf is 3.5 x 10-4 .
Answers
The percent ionization of a 0.337 M HF solution can be calculated using the Ka of HF, which is 3.5 x 10-4.
The percentage oxidized indicates what proportion of the starting substance has been converted into ions.
As a result, we evaluate the concentration of the ion in solution by contrasting it to the initial concentration of the neutral species.
In a particular solution of a mild acid, the percentage of ionization will change depending on the initial concentration of the acid, and it will get lower as the concentration of the acid gets higher.
1. Write the ionization equilibrium expression for HF:
HF ⇌ H+ + F-
Ka = [H+][F-] / [HF]
2. Assume 'x' is the concentration of H+ and F- ions at equilibrium, so:
Ka = (x)(x) / (0.337 - x)
3. Plug in the given Ka value (3.5 x 10^-4) and solve for 'x':
3.5 x 10^-4 = (x)(x) / (0.337 - x)
4. Solving for 'x' using a calculator or a suitable approximation method, you will get the value of 'x', which represents the equilibrium concentration of H+ ions.
5. Calculate the percent ionization by dividing the concentration of H+ ions (x) by the initial concentration of HF (0.337 M) and multiplying by 100:
% ionization = (x / 0.337) x 100
Using this method, you can find the percent ionization of the 0.337 M HF solution.
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all in a day's work cryptogram
Answers
Answer:
yup!
Explanation:
i dont know what else to say.
Density is defined as
Responses
A volume/massvolume/mass
B length to mass ratiolength to mass ratio
C mass to length ratiomass to length ratio
D mass/volumemass
Answers
Answer:
D. Density is defined as mass/volume.
Cations are formed when neutral atoms lose neutrons positrons protons electrons
Answers
Cations are formed when neutral atoms lose electrons from the valence shell of an atom.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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Ammonia, NH3 (Delta. Hf = –46. 2 kJ), reacts with oxygen to produce water (Delta. Hf = –241. 8 kJ) and nitric oxide, NO (Delta. Hf = 91. 3 kJ), in the following reaction: 4 upper N upper H subscript 3 (g) plus 5 upper O subscript 2 (g) right arrow 6 upper H subscript 2 upper O (g) plus 4 upper N upper O (g). What is the enthalpy change for this reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants. -900. 8 kJ –104. 6 kJ 104. 6 kJ 900. 8 kJ.
Answers
The change in enthalpy for the reaction has been 900.8 kJ. Thus, option D is correct.
Enthalpy change has been defined as the amount of heat energy produced, or absorbed or released by the reactants in the chemical reaction for the formation of products.
Computation for the Enthalpy change of reactionThe given chemical reaction has been:
\(\rm 4\;NH_3\;(g)\;+\;5\;O_2\;(g)\;\rightarrow\;6\;H_2O\;(g)\;+\;4\;NO\;(g)\)
The change in enthalpy in the reaction has been given as:
\(\Delta H_{rxn}=\Delta H_{Product}-\Delta H_{Reactant}\)
The enthalpy for products and reactants has been given in the table attached.
The change in enthalpy for reaction has been given by substituting the values as:
\(\Delta H_{rxn}=6\;\times\;\Delta H (\rm{H_2O} )\;+\;4\;\times\;\Delta H (\text{NO})-4\;\times\;\Delta H(\rm{NH_3})\\\Delta \textit H_{\textit {rxn}}=6\;\times\;(-241.8)\;+\;4\;\times\;(91.3)\;-\;4\;\times\;(-46.2)\;kJ\\\Delta \textit H_{\textit {rxn}}=900.8\;kJ\)
The change in enthalpy for the reaction has been 900.8 kJ. Thus, option D is correct.
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thank you so much for putting all the answers in there
Answers
Answer:
\(\huge\color{cyan}{\colorbox{magenta}{Answer}}\)
thank you
According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus?
Answers
According to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus is specific allowed orbits.
What is orbits?Encyclopedic entry. An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.An orbit is a regular, repeating path that one object takes around another object or center of gravity. Orbiting objects, which are called satellites, include planets, moons, asteroids, and manmade devices.Objects orbit each other because of gravity. Gravity is the force that exists between any two objects with mass. Every object, from the smallest subatomic particle to the largest star, has mass. The more massive the object, the larger its gravitational pull. Gravitational pull is the amount of force one object exerts on another object.
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The Kinetic Molecular Theory describes the behavior as well as the characteristics of an ideal gas. What are the five postulates of this theory? Provide at least 3 examples to describe these postulates.
Answers
Answer:
See explanation
Explanation:
The postulates of the kinetic theory of matter are;
Every substance is made up of tiny particles called molecules. Brownian motion and diffusion illustrates this fact.The molecules that compose matter are in constant random motion.There exists an attractive force between the molecules in matter. The attractive forces between gases are negligible. Solids have a definite shape and volume due to a high magnitude of intermolecular forces. Liquids have a volume but no definite shape due to weaker intermolecular forces. Gases have the weakest intermolecular forces hence the do not have both a shape and volume. They take on the volume of the container into which they are put. This illustrates this fact.The actual volume occupied by gas molecules is negligible relative to the volume of the container. The fact that gases are easily compressible illustrates this fact.Temperature is a measure of the average kinetic energy of the molecules of a body.What is solute?
A. The mixture of one substance dissolved in another
B. The substance that is dissolved in another substance
C. The remaining substance that does not become dissolved
D. The substance that dissolved another substance
Answers
Answer:The substance that is dissolved in another substance
Explanation:
The solute is what is dissolved in a solvent, and the result is a solution.
Answer:
B
Explanation:
cuz solute is the minor component in a solution, dissolved in the solvent so it is a substance that dissolve in solvent
in my opinion the second idea is describe solute
Wich SI unit is most appropriate for measuring density?
Answers
Answer
The most used SI unit for density is gram per liter (g/L).
Explanation
Density = m/V where m is the mass in grams, g and volume in liters, L
Therefore the unit will be g/L
When are elements heavier than iron formed by stars?(1 point)
1. in small, old stars
2. as a dying star explodes
3. as a star is first formed
4. in young stars
Answers
Answer:
2
Explanation:
What volume (in liters, at 703 k and 2.04 atm) of chlorine gas is required to react with 3.39 g of p?
Answers
The volume of chlorine required is 7.71 L.
The reaction between phosphorus and chlorine is:
2P + 5Cl₂→ 5PCl₅
Therefore, 2 moles of P requires 5 moles of chlorine to react with it.
Given mass of P =3.39 g
Molar mass of P=30.97 g/mol
No. of moles of P = given mass/ molar mass = 3.39 / 30.97 = 0.109 moles
2 moles of P requires 5 moles of chlorine
0.109 moles of P will require 0.109 x 5/2 = 0.2725 moles of chlorine
According to ideal gas equation
PV=nRT
2.04 x V = 0.2725 x 0.0821 x 703
V = 0.2725 x 0.0821 x 703 / 2.04
V = 7.71L
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How can humans cut down on the amount of carbon that is in the atmosphere?.
Answers
The atmosphere Moves to alternative technologies that use less or less gas.
We can't stop global warming overnight but we can slow and limit global warming by reducing human emissions of heat-trapping gases and soot. Emissions can be reduced by switching to alternative technologies that use less or no gas.
Using public transport carpooling biking and walking reduces the number of cars on the road and greenhouse gases in the atmosphere. Carbon dioxide is removed from the atmosphere by passing the air through large air filters and is stored deep underground. This technology already exists and is being used on a small scale.
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an unbalanced 16.0 N force is applied to a 2.0 kg mass. what is the acceleration of the mass
Answers
The acceleration of the mass is 8.0 m/s² when an unbalanced 16.0 N force is applied to a 2.0 kg mass.
To calculate the acceleration of the mass, we can use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).
We know that the force acting on the object is 16.0 N, and the mass of the object is 2.0 kg. So, we can use the equation to solve for the acceleration:
a = F ÷ m
where, a = acceleration, F = force (16.0 N), m = mass (2.0 kg)
So,
a = 16.0 N ÷ 2.0 kg = 8.0 m/s²
Therefore, the acceleration of the mass is 8.0 m/s²
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Please answer thank you so much!
Answers
A scuba diver’s air tank contains oxygen, helium, and nitrogen at a total pressure of 205 atmospheres. The partial pressure of nitrogen is 143 atmospheres, and the partial pressure of helium is 41 atmospheres. What is the partial pressure of oxygen in the tank?
Answers
answer is 20
explanation: total Pressure = 205
partial pressure of N = 143
partial pressure of He = 41
total pressure = partial pressure of N + partial pressure of O + partial pressure of He
partial pressure of O = 205 - 185 = 20
Answer:
20
Explanation:
choose the biggest number A: 5 B:22 C:8 D:5580
Answers
Answer: A
jk D
Explanation: because its math
Drag and drop the words that accurately complete the chart below. Example a lion and a cheetah mistletoe on a tree a coyote eating a rabbit a remora and a shark clownfish and anemone parasitism friendship competition Type of Symbiosis mutualism 1:10 predation relationship commensalism collaboration alliance
Answers
Answer:
Lion and cheetah - Competition
Mistletoe on a tree - Parasitism
Coyote eating rabbit- Predatation
Remora and Shark - Mutualism
Clownfish and Anemone - Relationship
Explanation:
Which letter represents the location of the resister in this diagram?
Answers
A resistor is shown with a zig zag, so D is the resistor
Answer:
letter D
Explanation:
letter A represent the battery
letter B represent the key
letter C represent nothing
letter D represent the resistance
The elements mercury and bromine are both liquids at room temperature, but mercury is considered a metal, and bromine is considered a non-metal. How can that be? Explain using properties you know of.
Answers
Answer:
At room temperature, mercury and bromine are of fluid consistency, it is because their melting or melting temperature is very low, so low that it reaches room temperature.
Compared to mercury and other metals, the more traditional metals have much higher melting temperatures.
On the other hand, bromine is not a metal, since it does not have the ability to oxidize with the presence of oxygen and also does not give up electrons.
Explanation:
Mercury in the periodic table is Hg, and bromine is Br
A soccer player applies a force of 56.6 N to a soccer ball while kicking it. If the ball has a mass of 0.46 kg, what is the acceleration of the soccer ball?
Answers
Answer:
\(a=123.04\ m/s^2\)
Explanation:
Given that,
Force applied to a soccer player, F = 56.6 N
The mass of the ball, m = 0.46 kg
We need to find the acceleration of the soccer ball. The force acting on the ball is given by :
F = ma
Where
a is the acceleration
\(a=\dfrac{F}{m}\\\\a=\dfrac{56.6 }{0.46 }\\\\a=123.04\ m/s^2\)
So, the required solution is \(123.04\ m/s^2\).