Answer: a) [tex]2H_2(g)+O_2(g)\rightarrow 2H_2O(g)[/tex]
b) 4.00 L of [tex]H_2O[/tex] will be produced
Explanation:
a) The balanced chemical reaction is:
[tex]2H_2(g)+O_2(g)\rightarrow 2H_2O(g)[/tex]
b) According to avogadros law, equal moles of gases occupy equal volumes at same temperature and presure conditions.
According to stoichiometry :
2 L of [tex]H_2[/tex] require = 1 L of [tex]O_2[/tex]
Thus 4.00 L of [tex]H_2[/tex] will require=[tex]\frac{1}{2}\times 4.00=2.00L[/tex] of [tex]O_2[/tex]
Thus [tex]H_2[/tex] is the limiting reagent as it limits the formation of product and [tex]O_2[/tex] is the excess reagent.
As 2 L of [tex]H_2[/tex] give = 2 L of [tex]H_2O[/tex]
Thus 4.00 L of [tex]H_2[/tex] give =[tex]\frac{2}{2}\times 4.00=4.00L[/tex] of [tex]H_2O[/tex]
Thus 4.00 L of [tex]H_2O[/tex] will be produced
a. The balanced reaction for the process should be 2h_2(g) + O_2(g) ⇒2H_2O(g)
b. The number of liters of water vapor should be 4.00 liters of H_2O.
Avogadro's law:a. The balanced reaction for the process should be 2h_2(g) + O_2(g) ⇒2H_2O(g)
b. As per the law, the equal moles of gases occupied equal volumes at the similar temperature
So, the number of liters should be
= 2/2*4.00
= 4.00 of H_2O
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Which gas will have the least collisions between its particles?
A. Helium at 20 C
B. Oxygen at -45 C
C. Carbon dioxide at 80 C
D. Argon at 265 K
The gas that has the least collisions between its particle is helium at 20° C. The correct option is A.
What is collision?Collision is a term used when two particles or object collides or clash and there is an exchange or transformation of energy between them. When a collision happens, the force is exerted on each other.
Helium is the second most abundant element present in the atmosphere. It is the lightest gas and its particle collides when there is an increase in the temperature.
Thus, the correct option is A. Helium at 20° C., regarding the collision of particles between its particles.
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One of the greatest dangers in a tornado is from flying objects. A 15 pound piece of lumber can turn into a flying missile that could severely damage walls and homes. A piece of steel with a mass of 200 pounds and travelling at the same velocity would cause even more damage. Select any evidence from the list below that you could use to explain why a 200 pound piece of steel would cause more damage than a 15 pound piece of wood travelling at the same velocity.
As the kinetic energy of an object increases, the force it can exert on another object decreases.
As the kinetic energy of an object increases, the force it can exert on another object increases.
Objects with more mass have less kinetic energy.
Objects with more mass have more kinetic energy.
As the velocity of an object increases, its kinetic energy decreases.
As the velocity of an object increases, its kinetic energy increases.
Answer:
As the kinetic energy of an object increases, the force it can exert on another object decreases.
Explanation:
The disaccharide lactose can be decomposed into its constituent sugars galactose and glucose. This decomposition can be accomplished through acid-based hydrolysis or by the enzyme lactase. Lactose intolerance in humans is due to the lack of lactase production by cells in the small intestine. However, the stomach is an acidic environment; therefore, one might expect lactose hydrolysis to still be an efficient process. The following data were obtained on the rate of lactose decomposition as a function of acid and lactose concentration.
Initial Rate (M^-1 s^-1) [Lactose]o (M) [H+](M)
0.00116 0.01 0.001
0.00232 0.02 0.001
0.00464 0.01 0.004
Required:
Using this information, determine the rate law expression for the acid-based hydrolysis of lactose.
Answer:
Rate = 116m⁻¹s⁻¹[lactose][H]⁺
Explanation:
the formula for rate of reaction is given as
Rate = k[lactose]∧α[H]⁺∧β
we solve for the value of α and β
([lactose]₁/[lactose]₂)∧α
α = [tex]\frac{ln\frac{0.00116}{0.00232} }{ln\frac{0.01}{0.02} }[/tex]
when we divide this equation
α = [tex]\frac{ln0.5}{ln0.5}[/tex]
α = 1
we find β
R₁/R₂ = 0.01/0.02(0.001/0.001)∧β
0.00116/0.00232 = 0.5(1)∧β
β = 1
Rate = k[lactose]∧α[H]⁺∧β
we have to find the value for k
k = 0.00116/0.01(0.001)
k = 0.00116/0.00001
= 116m⁻¹s⁻¹
Rate = 116m⁻¹s⁻¹[lactose][H]⁺
Lüderitz and Florianopolis are the same distance from the equator and they are both near the ocean. Use the information on the map to answer these questions: How does the air temperature of Lüderitz compare to the air temperature of Florianopolis? Why?
Answer: At Luderitz, only a little energy is transferred from the ocean to the air. At Florianopolis, a lot of energy is transferred from the air to the ocean. ... Even though the ocean water at each location is a different temperature, the same amount of energy is transferred to the air at both locations.
Explanation:
Both locations are at the same distance from the equator at Lüderitz, only a little energy is transferred from the ocean to the air. Hence option A is correct.
Where is Lüderitz ocated ?The Lüderitz is a coastal town and is located in southwestern nambia and is known for its colonial buildings. It has a desert climate and moderate temperatures throughout the year.
The windy and cold climate occurs due to the south Atlantic current. The place has a little energy that is transferred from the oceans to the air as compared to Florianopolis hat has lots of energy even though the water has different temperatures same energy is transferred to both locations.
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Which of these items is made up of one or more molecules?
Gold
Hydrogen
Salt
Neon
The item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
What is a Molecule?A molecule may be defined as a group of one or more atoms that are held together by numerous chemical bonds. It is the smallest particle of a substance that has all sorts of physical and chemical properties of that substance.
Among the given options, gold and neon are the elements, while salt is a compound. Hydrogen is a gas of diatomic molecules bearing the formula H2. It is colorless, tasteless, odorless, non-toxic, and highly combustible. Hydrogen in its molecular form is more common.
A hydrogen molecule is one of the simplest possible molecules which significantly consists of two protons and two electrons. These protons and electrons are remarkably held together by electrostatic forces.
Therefore, the item that is significantly made up of one or more molecules is hydrogen. Thus, the correct option for this question is B.
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A two metal alloy is 85% iron by mass. How many grams of manganese are found in a 36 gram sample of the alloy?
Answer:
5.4g
Explanation:
Metal Alloy = Iron + Manganese
Composition of Iron = 85%
Mass of Alloy = 36 g
Mass of Iron = 85/100 * 36 = 30.6g
Mass of Manganese = Mass of Metal Alloy - Mass of Iron
Mass of Manganese = 36g - 30.6 g = 5.4g
PLZ HELP ILL GIVE BRAINLIEST PLS 20 POINTS!!!.
Energy generated from wind has both advantages and disadvantages. What is true about wind energy?
No greenhouse gases are given off by wind power, but payback for construction takes many years.
Some erosion occurs around the towers of wind turbines, but electrical fires are highly unlikely.
There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use.
Modern turbines are safe for birds and bats that fly in the area but can reduce the number of crops grown on farmland.
Explanation:
I wanna go with the 3rd option
Answer:
Its "There is enough wind power in the U.S. to drive the entire country, but aesthetic considerations cause some people to oppose its use."
Explanation:
Yw! :D took the test
D: ____________________________________________
E: ____________________________________________
Answer:
I think the awnser would be c urf mom
Explanation:
species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. which pf the following best explains this difference
A: Bacteria reproduce more rapidly, allowing species to evolve more quickly
B:Bacterial populations are more isolated, permitting increases in genetic variability
C:certain bacteria grow more steadily over time, giving an evolutionary advantage over mammals
D: Individual bacteria have the same genes, providing opportunities for increased biodiversity in one population.
Answer:A
Explanation:
Species evolve at different rates. for example, bacteria are unlikely to become extinct because they adapt more quickly than mammals to environmental changes. Bacteria reproduce more rapidly, allowing species to evolve more quickly best explains this difference. Therefore, option A is correct.
What allows bacteria to evolve so quickly ?Bacterial species evolve quickly because of their large populations, which provide numerous opportunities for mutations, and because they readily exchange genetic information, even between species. Some of this genetic diversity influences drug sensitivity or resistance, providing material for Darwinian selection.
Bacteria are among the world's fastest reproducing organisms, doubling every 4 to 20 minutes. Some pathogenic strains of E. coli grow quickly.
Bacterial populations evolve antibiotic resistance so quickly due to their fast generation times, large population sizes, and unique gene acquisition methods. These are some of the reasons bacteria have been so successful in evolution.
Thus, option A is correct.
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A barometer is used to measure air pressure.
Please select the best answer from the choices provided
Т
F
Barry makes a hypothesis that driving with his windows closed will increase
his gas mileage. If the gas mileage does not change, what should Barry do
next?
A. Conclude that the gas additive has gone bad
B. Assume that the hypothesis is not useful because it made a wrong
prediction
C. Change the results to show that the hypothesis is correct
D. Repeat the experiment to confirm the result
Answer: D. Repeat the experiment to confirm the results
How does black and coloured objects absorb light and convert it into heat?
Answer:
Light energy can be converted into heat energy. A black object absorbs all wavelengths of light and converts them into heat, so the object gets warm. A white object reflects all wavelengths of light, so the light is not converted into heat and the temperature of the object does not increase noticeably.
The solubility product for Zn(OH)2 is 3.0×10−16. The formation constant for the hydroxo complex, Zn(OH)2−4, is 4.6×1017. What is the minimum concentration of OH− required to dissolve 1.7×10−2 mol of Zn(OH)2 in a liter of solution?
Answer:
[tex][OH^-]= 1.12 \times 10^{-2} \ M[/tex]
Explanation:
[tex]\text{From the information given:}[/tex]
[tex]K_{sp} \ of \ Zn(OH)_2 \ is \ 3.0 \times 10^{-16}[/tex]
[tex]K_f \ of \ Zn(OH)_2 = 4.6 \times 10^{17}[/tex]
[tex]\mathtt{K_{sp} \ \ \ \ \ \ \ \ \mathtt{Zn(OH)_{2(s)}} \to Zn^{2+}_{(aq)} + 2OH^{-}_{(aq)} }[/tex]
[tex]\mathtt{K_{f} \ \ \ \ \ \ \ \ \mathtt{Zn^{2+}_{(aq)} } + 4OH^-_{(aq)} \to Zn(OH)^{2-}_{4}_{(aq)}}[/tex]
[tex]\mathtt{K \ \ \ \ \ \ \ \ \mathtt{{Zn(OH)_{2}_{(s)}}} + 2OH^{-}_{(aq)} \to Zn(OH)^{2-} _{4(aq) }}[/tex]
[tex]\text{To calculate the minimum concentration of OH}^{-}[/tex]
[tex]K = \dfrac{Zn(OH)^-_4}{[OH^-]^2} \\ \\[/tex]
[tex][OH^-]^2= \dfrac {0.017}{1.380 \times 10^2}[/tex]
[tex][OH^-]^2=1.232 \times 10^{-4}[/tex]
[tex][OH^-]= 1.12 \times 10^{-2} \ M[/tex]
The minimum concentration of OH- required to dissolve [tex]1.7\times10^-2\; mol[/tex] [tex]Zn(OH)_2[/tex] in a liter of solution is [tex]1.12 \times 10^-^2 \; M[/tex].
What is concentration?Concentration refers to the accumulation of a substance in a specific place.
The solubility equilibrium
[tex]ksp\;of\; Zn(OH)_2 = 3.0 \times 10^-^1^6\\kf \;of\; Zn(OH)_2 = 4.6 \times10^1^7[/tex]
Calculating the minimum concentration
[tex]k =\dfrac{Zn(OH)^-^4}{[OH^-]^2} \\\\[/tex]
[tex][OH^-]^2 = \dfrac{0.017}{1.380 \times 10^2} \\\\[OH^-]^2 = 1.232 \times 10^-^4\\[OH^-]^2 = 1.12 \times 10^-^2[/tex]
Thus, the minimum concentration of OH- required is [tex]1.12 \times 10^-^2 \; M[/tex]
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For parts a & b below, derive only the initial value problem set up.
A tank of capacity 200 gallons holds 100 gallons of water with 25 pounds of sugar in solution. Pure water is poured into it at the rate of 2 gallons per minute, and the well-stirred mixture flows out of this tank at a rate of gallon per minute and into the second tank that initially contained 50 gallons of fresh water. The well-stirred mixture in the second tank is allowed to leave the tank at the same rate (1 gal/min).
1. Determine an Initial value problem that satisfied by the amount of sugar in the first tank (Tank A).
2. Determine an Initial value problem that satisfied by the amount of sugar in the second tank (Tank B).
Answer:
Explanation:
From the given information:
Let y(t) be the amount of sugar in tank A at any time.
Then, the rate of change of sugar in the tank is given by:
[tex]\dfrac{dy}{dt}= (rate \ in ) - ( rate \ out )[/tex]
The rate of the sugar coming into the tank is 0
[tex]\text{rate of sugar going out }= \dfrac{y(t) \ pound}{100}\times \dfrac{1 }{min} \\ \\ = \dfrac{y}{100} \ pound/min[/tex]
[tex]So; \\ \\ \\ \dfrac{dy}{dt} = 0 - \dfrac{y}{100} \\ \\ \implies \dfrac{dy}{y }= -\dfrac{dt}{100 } \\ \\ \implies dx|y| = -\dfrac{t}{100}+C \\ \\ \implies e*{In|y|}= e^{-\dfrac{t}{100}+C} \\ \\ \implies y = Ce^{-\dfrac{t}{100}}[/tex]
Initial amount of sugar = 25 Pounds
Now; y(0) = 25
25 = Ce⁰
C = 25
So; y(t) = 25 [tex]e^{-\dfrac{t}{100}[/tex]
Thus, the amount of sugar at any time t = [tex]\mathbf{25 e^{^{-\dfrac{t}{100}}}}[/tex]
B) For tank B :
[tex]\dfrac{dy}{dt}= 1 - \dfrac{y}{50 } \\ \\ \dfrac{dy}{dt}= \dfrac{50-y}{50} \\ \\ \dfrac{dy}{50-y }= \dfrac{dt}{50}[/tex]
Why do materials interact to light differently?
Answer:
Refracted (refraction) – the bending of transmitted light as it travels across the boundary of one material into another material in which it's speed is different. Unlike diffraction, this change in direction of light occurs because light is changing its speed in the different substances in it traveling in.
Explanation:
Hope it helps
A hot piece of copper was dropped into 155 g of water at 23.6 °C and 2,100 J of energy was transferred to the water. What is the final temperature of the water?
Answer:
26.8 °C
Explanation:
Step 1: Given and required data
Mass of water (m): 155 gEnergy transferred to the water (Q): 2100 JInitial temperature of the water (T₂): 23.6 °CFinal temperature of the water (T₁): ? Specific heat of water (c): 4.184 J/g.°CStep 2: Calculate the final temperature of the water
We will use the following expression.
Q = c × m × (T₂ - T₁)
T₂ = 2100 J/(4.184 J/g.°C) × 155 g + 23.6 °C = 26.8 °C
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What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?
The physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table is the gaseous state at room temperature.
What are Physical properties?Physical properties may be defined as those properties of matter that do not involves any chemical manifestation or appearance within the element. These properties are measurable and state the alteration between momentary states. Some examples of physical properties are as follows:
Physical appearance or color.Hardness of elementDensity.Melting and boiling points.Electrical conductivity.The groups located in the rightmost column of the periodic table are known as the halogens and the noble gases. These elements are typically gaseous in phase at room temperature. Apart from this, halogens also have high electronegativities because these elements have seven electrons in their valence electrons.
Therefore, the gaseous state at room temperature is the physical property that is characteristic of all of the elements in the group located in the rightmost column of the periodic table.
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What happens to an elements property when he doesnt pay his taxes?
Answer:
I've got a feeling...
Explanation:
What?
Each element is made of
A.many types of atoms
B.the periodic table
C.one type of atom
D.molecules
if the pressure of 200 cm cube of a gas is half at constant temperature.what will be the new volume
Answer:
hbjeofjwwkjjhhwhhyuhcuh
Explanation:
bjsdhoooiiifckuvghvvr
PLEASE HELP ME ASAP AND DONT GUESSSS!!!!!!!
Answer:
Digestive
Explanation:
It is necessary for the body to function so it is technically an organ
Answer:
[tex]Question ...4 : D[/tex]
[tex]Question...5: B[/tex]
Explanation:
Hope this helps
Have a nice day
If the percent yield for the following reaction is 65.0%, and 30.0 g of NO2 are consumed in the reaction, how many grams of nitric acid, HNO3(aq), are produced?
3 NO2(aq) + H2O(l) --> 2 HNO3 (aq) + NO (g)
Answer:
17.8 grams HNO₃
Explanation:
Given: 3NO₂(g) + 2H₂O(l) => 2HNO₃ + NO
30.0g/46g/mol 2/3(0.652mol)
= 0.652mol = 0.435mol (theoretical)
actual yield (65.0%) = 0.65(0.435mol) = 0.283mol(63g/mol) = 17.8 grams HNO₃
HELP PLEASE!! (100 points)
Describe what happens to particles of matter as you cool the matter to absolute zero
(OK). In your description, be sure to explain the changes in kinetic energy and
particle motion
Answer:
As you cool a matter to absolute zero, their kinetic energy reduces significantly and the molecules slows down and begins to aggregate together. ... As heat is added, the molecules gain more kinetic energy. This shown in their increase motion. When heat is withdrawn, the particles slows down hope this helped
If you were to heat up a 1-kilogram rock and 1 kilogram of water, you would see that the rock both gains heat and loses heat faster than the water. If you allow them to cool down, which one will come back to room temperature faster?
Answer: If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water
Explanation:
Answer:
If you were to heat up a 1-kilogram rock and 1 kilogram of water and allow them to cool down, you would notice that the rock returns to room temperature much faster than the water.
Explanation:
edmentum/plato
What happens because of nuclear fusion?
A. Earth experiences cold temperatures neede to sustain life.
B. Plants are unable to produce their own food.
C. Animals receive too much heat and begin to die out.
D Earth is provided with heat and light energy needed to sustain life.
Answer:
d
Explanation:
Salt is an ionic compound that is produced when a cation and an anion from an acid-base reaction combine, and solutions of salts can be neutral, acidic, or basic, depending on the acid-base properties of the constituent cations and anions.
a. True
b. False
Answer:
a. True
Explanation:
The statement given regarding salt is correct,
Salt is ionic in nature, as it is composed of a positive ion, i.e. , cation and a negative ion, i.e. , anion.
Salt can be made by the combination of respective acid and base.
There are three nature of salt, acid, base and neutral.
Hence, from the given statement of the question,
The correct option is a. True.
A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 3.30kg of water at 23.8°C. During the reaction 112.kJ of heat flows out of the bath and into the flask. Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18·J·g−1K−1. Round your answer to 3 significant digits. °C
Answer:
[tex]T_2= 31.9\°C[/tex]
Explanation:
Hello there!
In this case, it is possible to propose an energy balance in order to illustrate how the heat released by the reaction is absorbed by the water:
[tex]-Q_{rxn}=Q_{water}[/tex]
Thus, since the heat released by the reaction is -112 kJ (-112000 J), it is possible to define the hear absorbed by the water in terms of mass, specific heat and temperature change:
[tex]-(-112000J)=m_{water}C_{water}(T_2-T_1)[/tex]
In such a way, it is possible to define the final temperature as shown below:
[tex]T_2=23.8\°C+\frac{112000J}{3300g*4.18\frac{J}{g\°C} }\\\\T_2= 31.9\°C[/tex]
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Explain Which enthalpy diagram shows that the reaction above is an exothermic reaction that produces -550 kJ of heat? Why? The
Answer:
no answer of this question
Which of the following does not contain ionic bonds?
Sulfur dioxide
Aluminum oxide
Sodium oxide
Answer:
Sulfur dioxide
Explanation:
Sulfur dioxide does not contain ionic bonds.
Ionic bonds are formed by transfer of electrons while covalent bonds are formed by sharing of electrons.
Ionic bonds are also called electrovalent bonds. They are formed by transfer of electrons from one specie to another.
On the other hand covalent bonds are formed by sharing electrons. Covalent bonds are usually formed between two nonmetals while ionic bonds are usually formed between a metal and a nonmetal.
Sodium oxide is ionic because it is formed from sodium and oxygen (metal and nonmetal). The same applies to aluminium oxide.
The only compound formed from two nonmetals is Sulfur dioxide. It contains covalent bonds.
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The simpler compounds/elements in a synthesis reaction will be in the___ side of the chemical equation
Answer:
Reactants
Explanation:
Synthesis is where two simpler compounds or elements combine. The left side with the simple elements are the reactants and the complicated synthesized compound is the product side.