What increases the salinity of the ocean surface water, causing it to sinkdownward?
Help
Answers
Answer:
Thermohaline Circulation
Explanation:
The process is known as “Thermohaline Circulation”. In the Earth’s polar regions ocean water gets very cold, forming sea ice. As a consequence the surrounding seawater gets saltier, because when sea ice forms, the salt is left behind. As the seawater gets saltier, its density increases, and it starts to sink.
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What is the electron structure of nitrogen?1s22s22p3 1s22s23s22p1 1s32s32p1 1s12s12p5
Doing another onee! 50 points for answering thiss!
How is 0.00025 written in scientific notation
It is a strong base and a very poor conductor of electric current.
B.
It is a strong acid and a very good conductor of electric current.
C.
It is a weak base and a very good conductor of electric current.
D.
It is a weak acid and a poor conductor of electric current.
Answers
Substance A is mixed with water and donates 0.4% of its H⁺ ions, therefore given substance is a weak acid & show poor conduction of electric current.
What are acids?
According to the Arrhenius theory of acids and bases, acids are those species which gives H⁺ ion to the solution.
In the question it is given that, substance A is mixed with water and it donates H⁺ ion, from this it is clear that given substance is acid. It is also mention that it donates only 0.4% of its H⁺ ion means partial dissociation is observed, so we conclude that this acid is weak in nature. And due to weak dissociation and less number of available H⁺ ion it did not conduct electricity effectively.
Hence, option (D) is correct i.e. it is weak acid and a poor conductor of electric current.
To know more about acids, visit the below link:
Answer:
D
Explanation:
Answers
Answer:
Mole fraction = 0,0166
Explanation:
Mole fraction is defined as mole of a compound per total moles of the mixture. In the solution, the solute is fructose and the solvent is water. That means you need to find moles of fructose and moles of water.
The molecular mass of fructose is 180,16g/mol and mass of water is 18,02 g/mol. Using these values:
91,7g fructose × (1mol / 180,16g) = 0,509 moles of fructose
545g water × (1mol / 18,02g) = 30,24 moles of water
Thus, mole fraction of fructose is:
Mole fraction = 0,0166
I hope it helps!
Chemb.01.08.3b
Chemb.01.08.3c******
Chemb.01.08.3d
4. What happens to the partial pressure of oxygen in a sample of air if the temperature is increased?
It increases.
It stays the same.
It decreases.
The change cannot be determined. ******
5. A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.4 kPa if PHe = 82.5 kPa andChemb.01.08.06= 0.4 kPa?
82.9 kPa******
19.3 kPa
18.5 kPa
101.0 kPa
6. Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?
argon
oxygen
hydrogen *****
neon
Answers
Correct Answer: The average kinetic energy of the gas decreases.
Reason:
From the ideal gas equation, we know that PV = nRT
where, P = pressure, V = volume, n = number of moles of gas, R = gas constant and T = temperature.
From above equation, it can be seen that, Temp. as a direct relation with Pressure and Volume. Hence, as temperature of the gas in a balloon decreases, pressure and volume also decreases.
Also, from kinetic theory of gases, we know that, kinetic energy of gas increases with increasing temp. Hence, average kinetic energy of the gas decreases with decreasing temp.
Answer 2:
Correct answer: Out
Reason:
From the ideal gas equation, we know that PV = nRT
where, P = pressure, V = volume, n = number of moles of gas, R = gas constant and T = temperature.
Therefore, when a sealed syringe is heated, it's temp. will increase. This, will result in expansion of gas i.e volume will increase. Hence, syringe plunger move in outwards direction.
Answer 3: Volume = 6046 L
Reason:
From the ideal gas equation, we know that PV = RT
where, P = pressure, V = volume, R = gas constant and T = temperature.
Given: P1 = 99 kPa, V1 = 3000 L, T1 = 312 K, P2 = 45.5 KPa and T2 = 289 K.
Therefore, we have:
Thus,
Hence, V2 = 6046 L
Answer 4:
Correct Answer: It increases
Reason:
We know that, pressure of gas, it directly proportional to temp. Hence, when the temp. of as is increases. Total pressure of gas mixture increases. This is because, partial pressure of individual component (in present case oxygen) increases.
Answer 5:
Correct answer: 18.5 kPa
Reason:
We know that, total pressure is the sum of the partial pressures of the gases present in it. Mathematically, it can be expressed as:
Ptot = PO2 + PHe + PCO2
Therefore, partial pressure of oxygen, PO2:
PO2 = Ptot − PHe − PCO2
= 101.4 − 82.5 − 0.4
=18.5 kPa.
Answer 6:
Correct Answer: Argon
Reason:
Inert gases are the best choice for inflating a balloon that must remain inflated for a long period of time. Among given options, both neon and argon are inert gas, But, atomic weight of Ar is 40g/mol, while is more than that of neon (20 g/mol). Hence,. Argon gas is preferred over neon gas.1. As the temperature of the gas in a balloon decreases, the average kinetic energy of the gas decreases.
2. The direction in which the syringe plunger would move is Out.
3. The volume of the balloon under these new conditions would be calculated using the following conversion factor ratios 6046 L.
4. It increases
5. 18.5 kPa
6. Argon
What is the average kinetic energy?
The average kinetic energy is the one and a half of the mass (m) of each gas molecule multiplied by the square of the RMS speed (vrms). There is a relationship between the pressure of a gaseous substance and the temperature of a gas.
Given the pressure of the gas in question 2, we can expect the direction in which the syringe plunger would move to be out.
Learn more about average kinetic energy here:
TRUE
FALSE
Answers
Answer:
False
Explanation:
The temperature at which solid changes into liquid is known as the melting point.
Energy is required for a solid to melt into a liquid.
However viscosity is known as friction in liquids. It is the force that opposes movements in liquid. Viscosity causes liquids to be sticky. It is measured as a force per unit area.
As such, melting is the change from solid to liquid and not viscosity.
The answer is thus false.
The statement about “Viscosity is the tendency of a solid to melt to a liquid” is false. It is melting not viscosity. Viscosity is the tendency of how the fluids flow.
Answers
So: (1.53x10^3)/(275K) = V2/(372K)
V2= 2.07x10^3L
Answers
Answer: Option (d) is the correct answer.
Explanation:
At high temperature, there will be more collision between the molecules as a result more energy will generate. Thus, a wave can move quickly.
In case of solids, the particles are held more closely with each other. Therefore, when temperature is high then solid particles being closer can pass on the energy more quickly as compared to gases.
Thus, we can conclude that waves move fastest in high-temperature solids.
Final answer:
In Physics, waves move fastest in high-temperature solids due to the close proximity of particles which facilitates faster wave transmission and the increased kinetic energy at high temperatures.
Explanation:
In the study of Physics, the speed of sound waves varies depending on the properties of the medium through which they are traveling. Solids have tightly packed particles which facilitate faster wave transmission. Conversely, gases have loosely packed particles which slow down wave travel. Temperature, while affecting speed at some level, doesn't have as significant an influence as the state of matter itself.
Therefore, among the options you provided: low-temperature gases, low-temperature solids, high-temperature gases, and high-temperature solids, waves move fastest in high-temperature solids.
This is due to the increased kinetic energy of the particles in a high-temperature solid as compared to a low-temperature solid; and the closer proximity of particles in a solid as compared to a gas.
Learn more about Wave Speed here:
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