The change in the entropy of the surrounding, ΔSₛᵤᵣ during the cooling process is 1000 J/K (Option C)
What is entropy?Entropy is simply defined as the measure of the degree of the disorderliness of a system. Mathematically, it can be expressed as:
ΔS = ΔH / T
Where
ΔS is the change in entropy of system
ΔH is the enthalpy change
T is the temperature
How to determine the entropy of the system (ΔSₛᵧₛ)Enthalpy change (ΔH) = –300 KJ Temperature (T) = 300 K Change in entropy of system (ΔSₛᵧₛ) =?ΔS = ΔH / T
ΔSₛᵧₛ = –300 / 300
ΔSₛᵧₛ = –1
ΔSₛᵧₛ = –1 × 1000
ΔSₛᵧₛ = –1000 J/K
How to determine the entropy of the surrounding Change in entropy of system (ΔSₛᵧₛ) = –1000 J/KChange in entropy of surrounding (ΔSₛᵤᵣ) =?ΔSsys = –ΔSsur
–1000 = –ΔSsur
ΔSₛᵤᵣ = 1000 J/K
Learn more about entropy:
https://brainly.com/question/13834300
Which set of measurements correctly identifies the speed of an object?
A.
Distance = 18 m
time = 2 hr
speed = 9m/hr
B.
Distance = 30 km
time = 17 min
speed = 1.8 km/hr
C.
Distance = 3 cm
time = 12 min
speed = 36 cm/min
D.
Distance
2 km
time = 24 sec
speed = 48 km/sec
Answer:
A. Distance = 18 m
time = 2 hr
speed = 9 m/hr
Explanation:
Speed is the same thing as velocity.
Velocity = distance/time
18m/2hr = 9m/hr
For choice B, the numbers are right, but the units are mixed (minutes were changed to hours)
One atom has 11 protons and 13 neutrons. Another has 11 protons and 12 neutrons. Are they the same or different elements? Explain your answer
Answer: Both the given species are isotopes of the same element.
Explanation:
An isotope is defined as the chemical species that have the same atomic number but a different mass number.
The atom consists of 3 subatomic particles:
Protons: They are positively charged particles present in the nucleus of an atom. Electrons: They are negatively charged particles present in the orbits around the nucleus of an atom. Neutrons: They are neutral particles present in the nucleus of an atom.An atomic number is defined as the number of protons or number of electrons present in a neutral atom. It remains specific for a particular element.
Mass number is defined as the sum of the number of protons and neutrons present in the nucleus of an atom.
Given values:
For isotope 1:
Number of protons = 11 = atomic number
Number of neutrons = 13
Mass number = 11 + 13 = 24
For isotope 2:
Number of protons = 11 = atomic number
Number of neutrons = 12
Mass number = 11 + 12 = 23
As the atomic number of both the isotopes is the same. Thus, they belong to the same elements.
Earth's surface is shaped and changed in many ways. Which of these can shape Earth's surface?
water
wind
ice
gravity
organisms (living things)
the sun
none of these
all of the above
Please answer correctly I still need help on this. I will give brainliest (No links or fake answers will receive no brainliest)
How many grams of AlCl3 are needed to completely react with 2.25 of NaOH?
Hope the picture help u understand I did it in steps so it would be easier to understand:)
Please help me school ends tomorrow
Which scenario describes a transfer of mechanical energy to heat and sound energy?
Question 7 options:
A)
a plant using energy from the sun to create food
B)
a very high pitched sound causing a glass to break
C)
talking into a microphone.
D)
clapping hands
Answer:
D) clapping handsExplanation:
hope it's helpful
Wetlands provide habitats for many living things because of their sheltered waters and what other feature?
Answer:
large supply of nutrients.
Explanation:
In a wetland, the soil is covered by water or is almost covered by water. This water may be coming upwards from an underground aquifer. Wetlands are covered by water for most of the year.
They are sheltered waters and do provide habitats for many living things.
Nutrients such as; Carbon sulfur, phosphorus, carbon, and nitrogen are cycled within the soil of wetlands hence wetlands have a large supply of nutrients.
Pls help me this is my last question
Answer: how much mass is in a certain amount of space
Explanation: density is g/mL; therefore it’s the mass (g) in a certain amount of space (mL)
Answer:
the answer would be how much mass is in a certain amount of space
Explanation:
Use the periodic table to identify the element indicated by each electron configuration by typing in the
chemical symbol for the element.
Answer:
Explanation:
1s22s22p6: Ne 1s22s22p63s23p3: P 1s22s22p63s23p64s1: K 1s22s22p63s23p64s23d8: Ni 1s22s22p63s23p64s23d104p65s24d3: Nb
We have that an element indicated by its electron configuration, we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
The Periodic table is categorized using the atomic number of elements and symbols are to aid search as well
For an element indicated by its electron configuration we can determine its Atomic number by selecting the electron represented on each orbit of the atom around the nucleus
Hence using the Periodic table to read the its Atomic Number
For more information on this visit
https://brainly.com/question/22552359?referrer=searchResults
Separation of mixtures by removing a layer of liquid
Answer:
Decantation
Explanation:
[tex]what \: is \: sound \: \: {?} [/tex]
Answer:
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the reception of such waves and their perception by the brain.
Explanation:
this is what i found hope it helps :)
Answer:
Sound is a form of energy which is caused due to the vibration of an object.
If you produce 35.7 grams of sodium chloride how many molecules of Chlorine gas were
needed?
2Na + Cl2 --> 2NaCl
(PLS HELP)
Answer: [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas are needed.
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of sodium chloride = 35.7 g
Molar mass of sodium chloride = 58.44 g/mol
Plugging values in equation 1:
[tex]\text{Moles of sodium chloride}=\frac{35.7g}{58.44g/mol}=0.611 mol[/tex]
The given chemical equation follows:
[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]
By the stoichiometry of the reaction:
If 1 mole of sodium chloride is produced from 2 moles of chlorine gas
So, 0.611 moles of sodium chloride will be produced from = [tex]\frac{2}{1}\times 0.611=1.222mol[/tex] of chlorine gas
According to the mole concept:
1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of molecules
So, 1.222 moles of chlorine gas will contain = [tex]\frac{6.022\times 10^{23}}{1mol}\times 1.222mol=7.36\times 10^{23}[/tex] number of molecules
Hence, [tex]7.36\times 10^{23}[/tex] number of molecules of chlorine gas is needed.
show the hybridization of co2
Answer:
Hybridization of CO2 (Carbon Dioxide)
Unit Test Review
Active
1
2
3
According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to
another?
O The volume and the shape stay the same.
O The volume increases to fill the new container, but the shape stays the same.
O The volume stays the same, but the shape changes to fit the new container
O The volume and the shape change to fill the new container
Answer:
the volume stays the same, but the shape changes to fit the new container
Explanation:
because the same amount/volume of liquid is being placed in a new container, the new container has a different shape to the old, thus changing the liquids shape but not volume.
Which of the following diagram is the correct electron dot diagram for AL
Answer:
the answer is a
Explanation:
what going on in each spot
nothing ksbsshshhzvsjajbsjshjsgdvdjhsbsj
Answer:
I don't know lol
Question 4 of 10
Which molecule is hexanal?
ОА, НС
ОН
В.
||
Ос. Н?
нсон
D.
Answer:
Hexanal, once commonly called caproic aldehyde, is a six-carbon straight-chain aldehyde. It is a clear liquid with an atmospheric-pressure boiling point of 131 ºC
Answer:
the answer is B the biggest one
Explanation:
4. How is ethanol made?
A. By fermenting sugars and starches
B. By composting grass cuttings and dinner table scraps
C. By boiling water and corn oi
D. By releasing carbon dioxide into the atmosphere
O
. Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9.
To which group in the Periodic Table does it belong?
a ] I
B] III
C] VII
D] 0
Answer:
C
Explanation:
it belong to that group as it needs 1 electron to be chemically stable
How much heat does it take to turn water from -30 degreesC to 120 degreesC?
If you actually know the answer please tell me! ASAP!!!
Answer:
110 degrees C
Explanation:
110 degrees
is your answer
Too much Carbon Dioxide in the atmosphere is a bad
thing. However, too little is also bad. Explain why it is important
for Carbon Dioxide to always exist in the atmosphere. Give specific examples of what it is used for to support your response.
Answer:
CO2 is an evil necessary element. co2 is needed for our survival. we need food for survival and food is produced by the plants through photosynthesis. for photosynthesis to take place co2 is one of the vital element. so no co2,no photosyntheseis maeans no food. no food no one will survive.
Drag the tiles to the correct boxes to complete the pairs.
Match each mineral with its main function in the body.
Answer:
Hello calcium maintains healthy bones and muscles. Zinc is for immune function. Iron carrier oxygen to blood. Sodium maintains fluid balance in the body.
Answer: Zinc : plays a role in immune system function
Iron: carries oxygen to all body tissues
Calcium: Maintains healthy bones and muscles
Sodium: maintains fluid balance in the body
Explanation: Got it right on PLATO/edmentum
How many particles are in 7.07x10^-6 moles of a substance?
Answer:
4.25*10^18
Explanation:
1 mole =6.023*10^23 particles
so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles
A mixture of He, Ne, and N2 gases has a pressure of 1.943 atm. If the pressures of He and Ne are 0.137 atm and 0.566 atm, respectively, what is the partial pressure of N2 in the mixture?  A. 0.703 atm  B. 1.24 atm  C. 0.151 atm  D. 1.943 atm
Answer:
The parcial pressure of N₂ in the mixture is 1.24 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=PHe + PNe + PN₂
You know:
PT= 1.943 atmPHe= 0.137 atmPNe= 0.566 atmPN₂= ?Replacing:
1.943 atm= 0.137 atm + 0.566 atm + PN₂
Solving:
1.943 atm= 0.703 atm + PN₂
1.943 atm - 0.703 atm= PN₂
1.24 atm= PN₂
The parcial pressure of N₂ in the mixture is 1.24 atm.
Hospital patients are administered oxygen from an pressurized
hyperbaric oxygen chamber. 600.0 L of oxygen is compressed in a
cylinder at 160.0 atm. What volume of oxygen can a cylinder supply at a
pressure of 3.0 atm?
Answer:
32000atm
Explanation:
Using Boyle's law equation;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (
V2 = final volume (L)
According to the question below:
P1 = 160.0 atm
P2 = 3.0 atm
V1 = 600L
V2 = ?
Using P1V1 = P2V2
160 × 600 = 3 × V2
96000 = 3V2
V2 = 96000/3
V2 = 32000atm
Pls help
Three gases are added to a single tan of the same size. The first gas is currently at 303.9kPa, the second at 1900tor and the third at 132.3PSI. To one
decimal place, what are the percentages for each gas of the total pressure in the tank?
Answer:
See Explanation
Explanation:
We must first convert the gas pressures to a common unit. I choose to convert all pressures to kiloPascal.
Since;
1 kilopascal = 7.501 torrs
X. =1900tor
X= 1900 × 1/7.501
X= 253.3 Kpa
Since 1 PSI =6.895 kilopascals
132.3PSI = 132.3 × 6.895/1
= 912.2 Kpa
Total pressure = 303.9kPa + 912.2 Kpa + 253.3 Kpa = 1468.8 kPa
For first gas;
303.9/1468.8 × 100 = 20.7%
For second gas;
912.2/1468.8 × 100 = 62.1%
For the third gas;
253.3/ 1468.8 × 100 = 17.2%
In the food chain below, what energy is available to the wolf?
A. Some of the energy transferred from the Sun, to the grass, to the deer.
B. All of the energy transferred from the Sun, the grass, and deer.
C. All of the energy transferred from the Sun to the grass.
D Some of the energy transferred from the Sun, but none from the grass or the deer.
Answer: A
Explanation:
The sun will give energy to the grass, giving the ability to grow. The deer will then come along and eat the grass transferring some of that energy to the deer, giving it the energy to do it's daily activities, then the wolf will eat the deer, only transferring some of the energy to the wolf, because the deer had ahead used some of the energy and it came out as feces ect.
Why is the C-14/C-12 ratio used to date once-living organisms?
A. C-12 becomes radioactive when an organism dies.
B. The amount of C-12 changes when an organism dies.
C. The half-life of C-14 changes when an organism dies.
D. An organism stops taking in carbon when it dies.
If an ecosystem is left alone after a disturbance, it will gradually change from being mostly competitive to being mostly cooperative. True or false?
true
false
plsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss answer with one of the options
Answer:
false
Explanation:
Answer:
True
Explanation:
I did the test, and I answered "false".... It was the wrong answer :(
I think the right anwser is "True" because after a disturbance an ecosystem can recover back its balanced state, so the organisms start to cooperate again.
Please help!!!!!
Due soon really need help
Answer:
a is 16 as the molar ratio is 4:2=2:1
b is 10 as the ratio is 4:2
500 ml of 3.31 M HCl is mixed with 56.1 g NaOH to produce water and table salt.
What mass of NaCl is produced?
ss
Answer:
m=1,48g
Explanation: