Answer:
Explanation:
a)
change in entropy of source = heat taken / temperature of source
= 6.28 x 10⁵ / (273 + 150)
= 628000 / 423
= 1484.63 JK⁻¹ ( decrease in entropy )
heat rejected in sink = 628000 x (273 + 50) / 423
= 628000 x 323 / 423
= 479536.64 J
change in entropy of sink = heat rejected / temperature of sink
= 479536.64 / (273 + 50)
=479536.64 / 323
= 1484.63 JK⁻¹ ( increase in entropy )
b )
net entropy change in the system
= +1484.63 - 1484.63
= zero.
Sulfur trioxide decomposes to form sulfur dioxide and oxygen, like this: SO3(g)-------SO2(g) + O2(g) Write the pressure equilibrium constant expression for this reaction.
Answer:
Kp = P(SO2) * P(O2) / P(SO3)
Explanation:
The equation is given as;
SO3(g) --> SO2(g) + O2(g)
In the pressurer equilibrium constant expression, only the gaseous entities are considered.
It is given as;
Kp = P(products) / P(reactants)
Product are SO2(g) and O2(g)
Reactant is SO3(g)
Kp = P(SO2) * P(O2) / P(SO3)
3.How many grams of lithium nitrate will be needed to
make 250 grams of lithium sulfate? Using the following
equation:
Pb(SO ), + 4 LINO - Pb(NO3), + 2 Li SO
4
Answer:
[tex]m_{LiNO_3}=314gLiNO_3[/tex]
Explanation:
Hello!
In this case, for the given chemical reaction:
[tex]Pb(SO_4 )_2, + 4 LiNO_3 \rightarrow Pb(NO_3)_4, + 2 Li_2 SO_4[/tex]
We can see a 4:2 mole ratio between lithium nitrate (68.946 g/mol) and lithium sulfate (109.94 g/mol); in such a way, via stoichiometry, the required mass of lithium nitrate to make 250 g of lithium sulfate turns out:
[tex]m_{LiNO_3}=250gLi_2SO_4*\frac{1molLi_2SO_4}{109.94gLi_2SO_4} *\frac{4molLiNO_3}{2molLi_2SO_4} *\frac{68.946gLiNO_3}{1molLiNO_3}\\\\m_{LiNO_3}=314gLiNO_3[/tex]
Best regards!
Convert for the following kelvin temperatures to degrees Celsius 188K 631K
Answer:
187,726.85 and 630,726.85
Find the number of moles of water that can be formed if you have 130 mol of hydrogen gas and 60 mol of oxygen gas.
Answer:
130 moles of water might be produced by the reaction.
Explanation:
We state the equation for production of water:
2H₂(g) + O₂ (g) → 2H₂O (l)
Moles of hydrogen: 130
Moles of oxygen: 60
We state that the limting reactant is the oxygen
For 2 moles of hydrogen, we need 1 mol of oxygen
For 130 moles of hydrogen, we would need 65 moles, and we only have 60. Ratio is 2:1
1 mol of O₂ can produce 2 moles of water
Then, 60 moles of O₂ will produce (60 . 2) /1 = 130 moles
need the answer ASAP
Answer:
d
Explanation:
What is the mass of this mineral sample?
15.5 grams
55 grams
110 grams
115.5
Answer:
110
Explanation:
Which of the following is true about the two atoms?
The table compares the number of subatomic particles in two atoms.
Atom Q- 3 protons, 3 electrons, 4 neutrons
Atom R- 3 protons, 3 electrons, 3 neutrons
Which of the following is true about the two atoms?
A)They have the same charge and same mass.
B)They have different charges but the same mass
C)They have different charges and different masses.
D)They have the same charge but different masses.
Thanks!
Answer:
The answer is D)They have the same charge but different masses.
The number of neutrons in a nucleus affects the mass of the atom but not its chemical properties. Thus, a nucleus with six protons and six neutrons will have the ...
Thank you and please rate me as brainliest as it will help me to level up
Answer: D
Explanation:just did it
In which of these three situations is the object accelerating?1. A trash truck takes off from the curb.2. A book rests on a shelf.3. An airplane banks to circle around the airport.only only 11only only 22both both 1 1 and and 331, 1, 2, 2, and and 33
Answer:
Only 1
Explanation:
Amplitude measures the light's
Select one:
a. frequency
b. equilibrium
c. wavelength
d. intensity
Answer:
d.) intensity
Explanation:
How are the formulas for ionic and covalent compounds determined?
Answer:
Pause the video to take as much time as needed. Pause it to create more wait-time to answer questions before I move on. One of the best ways to learn is to quiz yourself as you go along.
Explanation:
The ionic compound and covalent compound can be easily determined by electronegativity difference.
What is ionic compound?If the compound will be formed by transferring the electrons then such kind of compound or molecule will be considered as ionic compound.
What is covalent compound?If the compound will be formed by sharing the electrons then such kind of compound or molecule will be considered as covalent compound.
It is easy to know the nature of compound like ionic or covalent . If the electronegativity difference of given molecule lies between 0 to 2.1 then molecule will be covalent compound. If electronegativity difference will be greater than 2.1 then compound will be ionic compound.
To know more about ionic compound and covalent compound.
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This is my last one, thanks!
Answer:
Bigger
Explanation:
Answer:
Explanation:
it is the 3rd one
Explain the importance of camera focus in making good forensic pictures
Answer:
Depth of field, often called the plane of sharpness, is the area in a photograph where objects are in sharp focus. Crime scene and evidence photographs should have as much in focus as possible (a deep plane of sharpness). This is because out of focus areas of a photograph can become issues in court.
Explanation:
Hope this helps!
A Grignard reagent is prepared by reacting cyclopentanol with first thionyl chloride and then magnesium in ether. The Grignard reagent is then reacted with acetaldehyde (ethanal) and the reaction mixture acidified. What is the major final product of this series of reactions?
Answer:
Grignard reagent is a chemical compound having a halogen group along with magnesium and organic group.
Explanation:
When cyclopentanol reacts with thiogyl chloride, it gives chlorocyclopentane as the product which on further reaction with magnesium metal gives Grigmard reagent as the main product.
A Grignard reagent is a chemical compound which have the chemical formula of R−Mg−X. Here, R is an organic group, Mg is magnesium and X is halogen. The organic group may be aryl or alkyl.
The reaction and the final product is given below at the attachment.
What parts of the body make up the immune system?
Answer:
The immune system is made of lungs, liver, intestine, bone marrow, tonsils, adenoids.Spleen, appendix, lymph nodes, and nodes.
Explanation:
Why was the weight of the fire snake slightly less after it was lit on fire
Answer:
Why did the fire snake weigh a little bit less than the ingredients it came from? When Zoe weighs the ingredients (sugar and baking soda), it weighs 25 grams in total. When she weighs the “snake” it weighs 23 grams. This is because some carbon dioxide gas produced during the chemical reaction escapes into the air
Brainliest
maybe
A precipitation was formed after mixing two substance . is my question a chemical change or is not a chemical change?
Answer: It is
Explanation:
You throw a 2-kg rock with a force of 10 N. What is the acceleration of the rock?
Answer:
5 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{10}{2} \\ [/tex]
We have the final answer as
5 m/s²Hope this helps you
Plzz help
its science
The efficiency : 95%
Further explanationEfficiency : the ratio between output and input work
In general, the value of the output of a machine is less than the value of the input because of the frictional force in the machine.
The greater the efficiency of the engine, the better the machine
Can be formulated :
[tex]\tt E=\dfrac{W_{out}}{W_{in}}\times 100\%[/tex]
w output = 190 J
W input = 200 J
The efficiency :
[tex]\tt E=\dfrac{190}{200}\times 100\%=95\%[/tex]
a type of physical that occurs between two electrically charged particles?
help it is due in 15 min and i’m so confused
gas has little particles that float around but very slowly and split up all around the place
How many moles of CO2 are in 14.6 L of CO2 gas at STP
Hey there!
1 mole CO₂ ---------------- 22.4 L ( at STP )
moles CO₂ ? --------------- 14.6 L
moles CO₂ = 14.6 x 1 / 22. 4
moles CO₂ = 14.6 / 22.4
moles CO₂ = 0.651 moles
Hope this helps!
Which group in the Periodic Table contains elements that form ions which are larger than their atoms?
Answer:
Which group in the Periodic Table contains elements that form ions which are larger than their atoms?
The second.. . Luckily for you, I just happen to have a chart in my room.
The periodic table that contains elements that form ions which are larger than their atoms is group 2 .
Elements in group 2 of the periodic table known as alkali earth metal usually form ions that are larger than their atoms.
The elements in this group include the following;
Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).Thus, we can conclude that the group in the periodic table that contains elements that form ions which are larger than their atoms is group 2 .
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0.448 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL volumetric flask, which is then filled up to the mark. The solution is mixed by inverting multiple times.
25.00 mL of this solution is then transferred to an Erlenmeyer flask for the titration. What mass of the diprotic acid is in the 25.00 mL that is transferred?
According to the Question:
We initially had 0.448 grams of the unknown diprotic acid, which was added to about 60 mL of water and that solution was added to a 100 mL flask and filled to the 100 mL mark
The above is as mentioned in the question, our 0.448 grams of diprotic acid is basically diluted to 100 mL [it's volume has been increased to 100mL]
but the amount of the acid is still the same
Which means that we now have 0.448 grams of the diprotic acid in a 100mL solution
Percent of the diprotic acid that will be present in the Erlenmeyer Flask:
From this 100 mL solution, 25 mL is transferred to the Erlenmeyer Flask
Which means that (25/100) * 100 = 25 % of the 0.448 grams of diprotic acid is present in the 25 mL sample
Mass of di-protic acid in the 25 mL solution:
Since 25% of the initial amount remains in the final solution,
Mass of the diprotic acid in the final solution = 0.448 * 0.25
Mass in the final solution = 0.112 grams
Therefore, 0.112 grams of the di-protic acid will be present in the Erlenmeyer Flask
Do you think it might be efficient for an industry to be monopolistically competitive rather than perfectly competitive?defend your answer.
Answer:
Because a good is always priced higher than its marginal cost, a monopolistically competitive market can never achieve productive or allocative efficiency. ... Because monopolistic firms set prices higher than marginal costs, consumer surplus is significantly less than it would be in a perfectly competitive market.
Explanation:
I think
A monopolistically competitive market can never achieve productive or allocative efficiency since a good is always priced higher than its marginal cost. In monopolistically competitive businesses, suppliers will underproduce.
What is efficiency ?Efficiency is the ability to achieve something or get a desired outcome without wasting resources, time, money, energy, or effort. In a broader sense, it is the capacity to carry out tasks effectively, efficiently, and without wasting time.
Due to the fact that it does not produce at the minimum of its average cost curve or where P = MC, a monopolistically competitive firm is inefficient. As a result, a firm that is monopolistically competitive would typically produce less at a greater cost and charge a higher price than a firm that is perfectly competitive.
Thus, In monopolistically competitive businesses, suppliers will underproduce.
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This volcano is surrounded by water. When the lava hardens, what landform will you see.
Question 9 (1 point)
For the following hypothetical reaction:
3A + 2B --> 60
How many moles of C can you produce with 4 moles of A and excess B?
(Enter just the number; not the number and units)
Your Answer:
Answer
Answer:
8 moles of C
Explanation:
From the question given above, the following equation was obtained:
3A + 2B —> 6C
From the equation above,
3 moles of A reacted to produce 6 moles of C.
Thus, the number of mole of C produced by reacting 4 moles of A can be obtained as follow:
From the equation above,
3 moles of A reacted to produce 6 moles of C.
Therefore, 4 moles of C will react to produce = (4 × 6)/3 = 8 moles of C
Thus, 8 moles of C can be obtained from the reaction of 4 moles of A with excess B
Testbank, Question 143 A compound with molecular formula C8H14O4 exhibits a triplet at δ 1.3 (6H), a singlet at δ 2.6 (4H) and a quartet at δ 4.2 (4H) in its 1H NMR spectrum. Its IR spectrum shows a strong absorption band near 1740 cm-1. What is the structure for this compound
Answer: fun fact an apple onion and potatoe all taste the same if you plug your nose
Explanation:
How many moles are present in 1.2L of a 0.1 M NaCl solution?
Answer:
0.12 mole.
Explanation:
From the question given above, the following data were obtained:
Molarity of NaCl solution = 0.1 M
Volume of NaCl solution = 1.2 L
Mole of NaCl =.?
Molarity of a solution is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:
Molarity = mole /Volume
Thus, we can obtain the mole of NaCl in the solution by using the above formula as follow:
Molarity of NaCl solution = 0.1 M
Volume of NaCl solution = 1.2 L
Mole of NaCl =.?
Molarity = mole /Volume
0.1 = mole of NaCl /1.2
Cross multiply
Mole of NaCl = 0.1 × 1.2
Mole of NaCl = 0.12 mole
Therefore, 0.12 mole of NaCl is present in the solution.
How many Joules of heat are needed to raise the temperature from 50°C
to 95°C for 35 g of water?
Answer:
Q = 6583.5 J
Explanation:
Given data:
Heat required = ?
Mass of water = 35 g
Initial temperature = 50°C
Final temperature = 95°C
Solution:
Specific heat capacity of water is 4.18 j/g.°C
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = 95°C - 50°C
ΔT = 45°C
Q = 35 g×4.18 j/g.°C × 45°C
Q = 6583.5 J
Which two options are a result of convection currents in the air on Earth?
A. Electromagnetic waves
B. Clouds
O C. Tides
D. Storm systems
The correct answers are B. Clouds and D. Storm systems.
Explanation
Convection currents are the result of a physical-chemical process in which chemicals are heated and this decreases their density, causing their elevation. At the same time, the elements in the top sink because of lost temperature and increase in density, creating a cycle. According to the above, the correct answers are B Clouds and D. Storm Systems. Clouds are the result of a cycle of water, in which the water on the earth in a liquid state evaporates due to the caloric energy from the sun, changing to a gas state and go up until becoming droplets again in a process called condensation forming cloud. Once the cloud is very heavy and lost its temperature, it precipitates to the earth due to the force of gravity, and then the cycle starts again. Secondly, storm systems are a kind of cloud, those clouds develop vertically thanks to the convection process, in this, the same process occurs but the clouds have an internal air stream that makes that the clouds grow up vertically producing storms, those clouds are known as Cumulonimbus and Cumulus congestus. So, the correct answers are B. Clouds and D.Storm systems.
Answer:
D. Storm systems
Explanation:
B. Clouds