1.scientists who capture fish from depths of 1000m or more for study have to bring them to the surface in pressurized containers. why do they do this?
2.a car of mass 600 kg has four tyres each of surface area 0.005m^2. determine the pressure exerted by each tyre on the ground
3.give reasons
a.non metals general do not displace hydrogen from dilute acids
b.aluminium easily combines with oxygen but still can be used for making kitchen utensils
4.can we store ferrous sulphatebsolution in zinc container?give reasons and write the chemical equation involved
@PsyDAG these poor kids asked this only beczuse they have a doubt they write what they know and what they dont know they ask to people who know and if you dont know then keep quiet let the geniuses answer loser
Exactly! If the kids have a doubt they will have to ask someone, right? Doing their homework without knowing what the real answer is isn't going to take them anywhere!
I can't believe you dad. I have you.
I agree mom and dad. PsyDAG, you have disappointed all of us!
1. Scientists bring fish captured from depths of 1000m or more to the surface in pressurized containers because of a phenomenon known as decompression sickness, or "the bends." As fish live at these extreme depths, they are subjected to high pressure conditions. Bringing them rapidly to the surface would cause a sudden decrease in pressure, leading to the formation of gas bubbles in their tissues. This can result in severe physiological damage or death. By placing the captured fish in pressurized containers, scientists can gradually decrease the pressure over time, allowing the fish to adjust to the change and minimizing the risk of decompression sickness.
2. To determine the pressure exerted by each tire on the ground, we need to use the equation:
Pressure = Force / Area
In this case, the force exerted by each tire is equal to the weight of the car, which is given by the formula:
Force = Mass x Gravity
where Mass = 600 kg and Gravity = 9.8 m/s^2 (acceleration due to gravity).
Area = 0.005 m^2 (surface area of each tire).
Plugging the values into the equation:
Pressure = (Mass x Gravity) / Area
Pressure = (600 kg x 9.8 m/s^2) / 0.005 m^2
Pressure = 117600 N / 0.005 m^2
Pressure = 23,520,000 Pa
Therefore, the pressure exerted by each tire on the ground is 23,520,000 Pascal (Pa).
3a. Nonmetals generally do not displace hydrogen from dilute acids because hydrogen is usually less reactive than nonmetals. Nonmetals are located on the right side of the periodic table, and their outermost electron shells are usually almost complete. Hence, nonmetals do not readily lose electrons to form positive ions. On the other hand, metals, which are located on the left side of the periodic table, tend to be more reactive and can displace hydrogen from dilute acids.
3b. Although aluminum easily combines with oxygen, it can still be used for making kitchen utensils because aluminum reacts with oxygen in the air to form a thin layer of aluminum oxide on its surface. This layer acts as a protective coating, preventing further oxidation and corrosion of the metal. It makes aluminum utensils resistant to rust and other forms of degradation. Therefore, despite its reactivity with oxygen, aluminum is suitable for making kitchen utensils.
4. We cannot store ferrous sulfate solution in a zinc container because ferrous sulfate is an iron-based compound, and when it comes in contact with zinc, a process called galvanic corrosion occurs. This corrosion happens due to the difference in electrochemical potentials between zinc and iron. The chemical equation involved is:
Zn (s) + FeSO₄ (aq) → ZnSO₄ (aq) + Fe (s)
This equation shows that zinc from the container will react with ferrous sulfate, resulting in the formation of zinc sulfate and solid iron. As a result, the storage container made of zinc would deteriorate and potentially contaminate the solution. Therefore, it is not suitable to store ferrous sulfate solution in a zinc container.