Answer:
it is B. The Law of Conservation of Energy
Explanation:
hope this helps
Why is training important?
A mixture of 5 cm3 of CH4 and 100 cm3 of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All volumes are measured at room temperature and pressure.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
What is the composition of the resulting gas?
Answer:
The composition of the resulting gas;
A. 5 cm³ of CO₂, 10 cm³ of O₂, 80 cm³ of N₂, and 10 cm³
Explanation:
The given parameters are;
The volume of CH₄ in the mixture of air and methane = 5 cm³
The volume of air in the mixture of air and methane = 100 cm³
The percentage by volume of nitrogen, N₂ in the air = 80%
The percentage by volume of oxygen, O₂ in the air = 20%
The equation for the reaction of the chemical reaction between the methane and the air in the mixture is given as follows;
CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)
Therefore, we have;
1 mole of CH₄ reacts with 2 moles of O₂ to produce 1 mole of CO₂ and 2 moles of H₂O
By Avogadro's law, we have that equal volumes of all gases at the same temperature and pressure contains equal number of molecules
Therefore, we have;
1 cm₃ of CH₄ reacts with 2 cm³ of O₂ to produce 1 cm³ of CO₂ and 2 cm³ of H₂O
From which we have;
5 cm₃ of CH₄ reacts with 10 cm³ of O₂ to produce 5 cm³ of CO₂ and 10 cm³ of H₂O (steam)
The volume of the oxygen used in the reaction = 10 cm³
The volume of oxygen present in the air = 20% × 100 cm³ = 20 cm³
The volume of nitrogen present in the air = 80% × 100 cm³ = 80 cm³
Therefore, the composition of the resulting gas is given as follows;
1) 80 cm³ Nitrogen
2) 10 cm³ Oxygen
3) 5 cm³ CO₂
4) 10 cm³ H₂O
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
The mixture of air has been composed of 20 % oxygen and 80 % nitrogen. The volume of air has been [tex]\rm 100\;cm^3[/tex]. Thus, the volume of oxygen and nitrogen in the air has been:
The volume of oxygen, [tex]V_O_2=20\;\rm cm^3[/tex]
The volume of nitrogen, [tex]V_N_2=80\;\rm cm^3[/tex]
Since the reaction, the nitrogen has been remained unused, thus the final composition of nitrogen has been [tex]\rm 80 \;cm^3[/tex].
The balanced equation for the reaction of methane with oxygen has been:
[tex]\rm CH_4\;+\;2\;O_2\;\rightarrow\;CO_2\;+\;2\;H_2O[/tex]
According to Avogadro's law, the presence of gases at the same temperature has volume proportional to the moles of the gases.
Thus, from the balanced chemical equation:
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;O_2[/tex]
Thus,
[tex]\rm 5\;cm^3\;CH_4=10\;cm^3\;O_2[/tex]
Since the available oxygen has been [tex]\rm 20\;cm^3[/tex], the remaining oxygen after the reaction has been [tex]\rm 10\;cm^3[/tex].
Thus, the final composition of oxygen has been [tex]\rm 10\;cm^3[/tex].
Methane has been the limiting reactant. Thus, the concentration of carbon dioxide and water formed has been:
[tex]\rm 1\;cm^3\;CH_4=1\;cm^3\;CO_2\\5\;cm^3\;CH_4=5\;cm^3\;CO_2[/tex]
The final composition of carbon dioxide has been [tex]\rm 5\;cm^3[/tex].
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;H_2O\\5\;cm^3\;CH_4=10\;cm^3\;H_2O[/tex]
The final composition of water (steam) has been [tex]\rm 10\;cm^3[/tex].
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
For more information about the composition of gas, refer to the link:
https://brainly.com/question/4391235
The apparent height of a building 10.5 km away is 0.02 radians. What is the approximate height of the building to the nearest meter
Answer:
Approximate height of the building is 23213 meters.
Explanation:
Let the height of the building be represented by h.
0.02 radians = 0.02 × [tex]\frac{180^{o} }{\pi }[/tex]
= 0.02 x (180/[tex]\frac{22}{7}[/tex])
0.02 radians = 1.146°
10.5 km = 10500 m
Applying the trigonometric function, we have;
Tan θ = [tex]\frac{opposite}{adjacent}[/tex]
So that,
Tan 1.146° = [tex]\frac{h}{10500}[/tex]
⇒ h = Tan 1.146° x 10500
= 2.21074 x 10500
= 23212.77
h = 23213 m
The approximate height of the building is 23213 m.
Find an everyday situation that involves density or buoyancy and explain it.
Answer:
Explanation:
Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.
Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.
Brainliest??
What is a positive component of Heath called:
Answer:
vegetables food, sport sport sport
Explanation:
????!!!!
What is a 60 kg car's velocity if it has a momentum of 2400 kg m/s?
Answer:
40m/s
Explanation:
momentum = mass * velocity
momentum / mass = velocity
2400kg*m/s / 60kg = 40m/s
Help answer these questions please!
You only have to answer the first one unless it’s already been answered then answer the next one (if you could explain how you did it, it would be much appreciated :))
Answer:
1a: Lead atoms are heavier than aluminum atoms, which means that a given mass of lead contains fewer atoms than the same mass of aluminum. Since the heat required to raise the temperature depends on the number of atoms, it takes less heat to raise the temperature of the lead than the temperature of the aluminum.
the measure of energy that a wave carries is known as what
Amplitude...........
Answer:
Amplitude
Explanation:
we took a test today and this same question showed up and it said it was Anplitude
A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at 1.2 m/s", which
force is closest to the net force acting on the vehicle?
Answer:
Gravitaitional pull
Explanation:
Guessing
Fish have gills that-
A. Help regulate body temperature
B. Take in oxygen needed for survival
C. Help maintain balance in the water column
D. Obtain carbon dioxide from water for survival
Answer:
B) Take in oxygen needed for survival
Explanation:
Even though fish can live their lives underwater, they still need oxygen to “breathe”
Most energy obtained from water is converted from _____.
groundwater
tidal generators
waterfalls
potential energy behind dams
Answer: potential energy behind dams
Explanation:
groundwater, tidal generators, and waterfalls don't produce enough kinetic energy.
A 400-kg space probe has a weight of 3,560 N on one of the above planets. According to the table
above, on which planet is the space probe? Show your work.
Answer:
Venus
Explanation:
To know the correct answer to the question, we shall determine the weight of the space probe on each planet to see which will correspond to 3560 N.
This is illustrated below:
For Mercury:
Mass = 400 Kg
Gravitational force = 3.7 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 3.7
Weight = 1480 N
For Venus:
Mass = 400 Kg
Gravitational force = 8.9 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 8.9
Weight = 3560 N
For Earth:
Mass = 400 Kg
Gravitational force = 9.8 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 9.8
Weight = 3920 N
For Neptune:
Mass = 400 Kg
Gravitational force = 11 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 11
Weight = 4400 N
For Jupiter:
Mass = 400 Kg
Gravitational force = 23.1 N/Kg
Weight =?
Weight = mass × gravitational force
Weight = 400 × 23.1
Weight = 9240 N
SUMMARY:
Planet >>>>>> Weight
Mercury >>>> 1480 N
Venus >>>>>> 3560 N
Earth >>>>>>> 3920 N
Neptune >>>> 4400 N
Jupiter >>>>>> 9240 N
From the above calculations, we can see that the weight of the space probe (i.e 3560 N) correspond to the weight on venus (i.e 3560 N)
Explain the term the refractive index of glass is 1.5
Answer:
Refractive index of a glass is 1.5 means that the speed of light travels 1.5 times SLOWER in that glass than in a vacuum.
Explanation:
Refractive index is defined as a ratio between the speed of light in a vacuum and the speed of light in a medium. Since the refractive index is a ratio between two speeds it is a dimensionless number. For the glass, having a refractive index of 1.5, means that the speed of light travels 1.5 times SLOWER in that glass than in a vacuum.
Please Help Me!!!!!!
Answer:
a.
Explanation:
Please I need help with this question (see image).
Show workings where necessary.
Answer:
I think the reason why ice is forming on the aluminium lumps and not the beaker, is because:
The beaker is already on the same temperature as the mixture inside it: as a result, there is no heat transfer.
on the other hand, the Aluminium Lumps is at a way lower temperature than the mixture and as a result, there is heat transfer from the water around the lumps to the aluminium Lumps itself.
turning the water into ice.
Heat is lost from the water, and gained on the aluminium.
Since the water was turned to ice.
we can say that the final temperature of the heat transfer process is 0°C.
Notice that we'll be making use of the latent heat of fusion for ice. since water is being converted to ice at 0°C.( workout is in above attachment)
To prevent dehydration when exercising on hot and humid days it is vital to:
Drink plenty of water only after you have exercised to avoid throwing up.
Drink water before, during, and after your exercise activity.
Wear fabric which keeps your sweat next to your body for cooling purposes.
Wear tight, constrictive clothing to help with aerodynamics.
Answer:
Drink water before, during, and after your exercise activity.
3. A 900 kg car has a velocity of 22.0 m/s.
a. Find the momentum (p) of the car.
Given:
m=
V=
Unknown:
P=
Solution:
p = mv
(IT IS NOT A Multiple choice question)
Answer:
19800kgm/s
Explanation:
Given parameters:
Mass of car = 900kg
Velocity = 22m/s
Unknown:
Momentum of the car = ?
Solution:
The momentum of a body is the quantity of motion it possess.
So;
Momentum = mass x velocity
So;
Momentum = 900 x 22 = 19800kgm/s
Complete the sentence with the word "element" or "compound."
O is a(n) ____
and H2O2 is a(n) ____
.
Answer:
"element"= There are four basic sentence patterns based on sentence construction element
Answer:
1st one. Element
2nd one. Compound
Explanation:
Fill in the blanks to complete the sentence.
Light acts like a
when it bounces off surfaces, and acts like a
when it bends around objects.
The answer is:
Fill in the blanks to complete the sentence.
Light acts like a PARTICAL when it bounces off surfaces,
and acts like a WAVE when it bends around objects.
I hope this helps you :>
Answer:
Particle and wave
Explanation:
Tonya is riding a motorcycle that goes from 30 m/s to 75 m/s in 5s. She is heading south to Florida. What is her acceleration?
How far would a car traveling at a speed of 35 miles per hour if it traveled for 3 hours?
Answer:
105
Explanation:
Simple math, 35x3=105.
Answer:
105
Explanation:
multiply your time by speed to get distance
approaching a dangerous intersection the driver slows her car from 40 meters per second to 15 meters per second in 5 seconds what is the acceleration
Answer:
- 5 m/s^2
Explanation:
Givens
vi = 40 m/s
vf = 15 m/s
t = 5 seconds
Formula
a = (vf - vi)/t
a = (15 - 40)/5
a = -25/5
a = - 5 m/s^2
Don't be bothered by the minus sign. It just means she is slowing down.
In the water cycle, water travels from bodies of water to the ____________. Then it travels back to the ground and to the oceans.
soil
mountains
air
lithosphere
Answer:
air
Explanation:
Water bodies are already found on the Earth's surface made up of soil which is part of the lithosphere
PLS HELP I WILL GIVE BRAINLYEST!!!
Given the equation P2 = A3, what is the orbital period, in days, for the planet Venus? (Venus is located 0.72 AU from the sun?) (2 points)
Group of answer choices
72 days
225 days
500 days
5,375 days
Answer:
225
Explanation:
Answer:
I am doing the test now let me make sure then I tell you ok, just a second..
225 is correct
Explanation:
How do scientists study pollen grains to help them understand climate change?
by analyzing and making inferences about them
by observing and listing facts about them
by studying and reading more about them
by writing hypothesis about them
Answer: A. by analyzing and making inferences about them
Explanation:
Answer:
by analyzing and making inferences about them
Explanation:
A light bulb has a resistance of 800 ohms. The current going through the bulb is 0.15 A. What is the potential difference across the light bulb?
A) 12 V
B) 5333 V
C) 120 V
D) 53.33 V
Answer:
120 V
Explanation:
v=i*r
v=0.15*800
v=120
Which two criteria are least important for engineers to consider when
developing a process to produce an important chemical?
A. The process should be located in a major city.
B. The process should use local, organic reactants.
c. The process should produce a significant amount of the product.
D. The process should be cost-effective.
Answer:
B C & D
Explanation:
should make you money, time well spent no time lost.
Answer:
B and C
Explanation: i looked at the test and i got it right
Which has more kinetic energy, a basketball rolling at a walking pace or a baseball rolling at the pace of someone running? How could we find out ?
Answer:
answer 2 because the baseball has less mass then the 1st one
A person is observing the oscillations of a wave. If the wave source begins to move away from the person, what will the person notice?
Answer:
Explanation:
C
Which of the following concepts helps explain the modern technology used in 3D films?
a. retinal disparity
b. convergence
c. overlap (interposition)
d. stroboscopic movement
Answer:
a.
Explanation: