Answer : The correct option is (d).
Explanation:
Hydrosphere : It is portion or surface covered by water or fluid on the Earth. Such as : oceans, lakes , lakes, clouds etc.
Geosphere: It is a solid portion of the Earth system which includes substance found on interior side of the Earth like: rocks,minerals landforms etc. Basically it provides shape to outermost layer of the earth.
Biosphere: Regions of surface, atmosphere and hydrosphere of the Earth occupied by living organisms is known as biosphere.
Chronospere: It is mass teleportation device which can move object through space and time.
So, from all the above options chronosphere is not a part of the earth system. Hence correct option is (d).
Write a few sentences summarizing what you already know about these topics.
The choice of renewable energy sources to be developed depends on the geographical and environmental characteristics of an area. Wind and tidal energy could be suitable for a coastal region, solar energy might be ideal for a sunny, arid region, and biomass energy could work well in forested areas. Setup and costs can vary depending on the specific circumstances.
The optimal types of renewable energy sources to be developed in a given area typically depend on the environmental and geographic factors of that area. In a coastal region, for example, harnessing wind energy and tidal energy could be very appropriate and effective. Wind turbines can be set up onshore or offshore to generate electricity from the consistent and powerful coastal winds, while tidal power plants can harness the energy of incoming and outgoing tides.
On the other hand, in a sunny, arid region like a desert, solar energy would likely be the most feasible and abundant source of renewable energy. Solar panels can be efficiently installed in these areas to convert sunlight directly into electricity.
Finally, in an area with abundant biomass resources (such as forested areas), biomass energy can be a good choice. This form of energy uses organic materials (like wood, crop waste, or even algae) to create heat, fuel, or electricity.
The ease of setup and costs associated with each type of renewable energy source can vary significantly depending on the specific factors of each location, as well as the type and scale of the energy project.
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Answer:
There is a lot but here are some!
Wind: Wind power is growing rapidly, and is becoming a well-recognized renewable energy resource. Using wind power to turn turbines that generate electricity can provide a cheap source of energy. Building and maintaining equipment could provide thousands of jobs and cost-efficient and clean electricity. Wind farms, however, are not particularly popular. They can impact local environment and wildlife, and even provide noise pollution. Additionally, many people feel that the equipment used obstructs scenic views.
Solar: This is perhaps the most recognized renewable energy source. Energy from the sun is captured using cells made from special materials (silicon is quite popular right now) and then converted into electricity. The biggest factor in solar cell production is cost. However, with technological advancements solar is becoming more cost efficient, and high efficiency solar cells are being developed. This is important, since high efficiency cells are hard to come by. New materials are providing solar cells that are easier to transport and install. Flexible solar cells can be used for residential use, and building solar arrays is becoming popular. One of the main factors in efficiency is the fact that solar panels only generate electricity during daylight hours, and can be hampered by cloudy conditions or pollution. Some sort of storage is needed in order to make full use of solar power.
Water: We have been studying water-based renewable energy for quite some time. Hydroelectricity has been a source of energy for years. However, even though the energy production process does not put off pollution, there are other environmental concerns associated with the damming of rivers and ecological impacts stemming from this practice. But hydroelectric power remains one of the more cost-efficient means of generating renewable energy.
Geothermal: Geothermal energy is extracted from the natural processes of the earth. A great deal of heat is created below Earth's surface, and efforts are being made to extract and use this power. While the ancient Romans knew about and used geothermal heating, now Earth's processes are being used to generate electricity -- going beyond space heating. Geothermal power does not put off greenhouse gases (although some harmful gases from deep in the earth would be released -- and need to be contained), and it is reliable. However, it can only be used in areas where there is tectonic activity.
Nuclear: Perhaps the most controversial form of renewable energy is nuclear energy. Electricity is produced from the energy released by nuclear reactions. While fission (splitting) is the main source used today, interest continues in developing cold fusion. Currently, though, power plants generating power using nuclear fission are among the safest plants. They also generate power without emitting pollution. In Europe, France benefits greatly as its nuclear energy produces the cheapest electricity (according to 60 Minutes).
What is the pressure, in atm, of the methane gas?
Express the answer using 3 significant figures.
atm
Answer:
P = 0.979 atm
Explanation:
Given data:
Number of moles of methane = 40.8 mol
Volume of container = 1020 L
Temperature = 298 K
Pressure of gas =?
Solution:
According to ideal gas equation,
PV = nRT
P = pressure
V = volume
n = number of moles
R = general gas constant
T = temperature
Now we will put the values,
P = nRT/V
P = 40.8 mol × 0.0821 atm.L/mol.K × 298 K / 1020 L
P = 998.2 atm /1020
P = 0.979 atm
B. [Na +3] / [PO43-]
C. [Na +] }[PO43-)
D. [Na] +3/[PO4) 3 -
The solubility product expression for Na3PO4(s) is [Na+]^3[PO4^3-], which denotes the ion concentration in the solution after the dissolution of sodium phosphate. therefore, option A is correct
The solubility product expression for Na3PO4(s) would be written as [Na+]^3[PO4^3-]. The solubility product, Ksp, is the equilibrium constant for the dissolution of a sparingly soluble substance. The solubility product expression depends on the stoichiometry of the dissolution reaction. Sodium phosphate, Na3PO4, dissociates in water into 3 sodium ions, Na+, and 1 phosphate ion, PO4^3-. Therefore, the solubility product expression is [Na+]^3[PO4^3-], where [Na+] and [PO4^3-] represent the molar concentration of these ions in the solution.
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The solubility product expression of Na3PO4 is not among the given options because Na3PO4 is soluble in water and for soluble compounds, we don't write a solubility expression.
The solubility product expression is typically written for an ionic compound that is sparingly soluble in water. The solubility product expression of Na3PO4 is not among the options you've provided because every ionic compound has its own specific solubility product expression. Na3PO4 is soluble, so we don't write a solubility expression for it. In general, for a reaction where a solid dissolves in water such as A3B (s) ↔ 3A+ (aq) + B3- (aq), the solubility product expression would be [A+]^3 [B3-].
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ANSWER
empirical formula is the simplest ratio of whole numbers of components making up a compound
molecular formula is the actual composition of components making up a compound
to analyse each statement
A.They are always different for the same compound. -
the empirical formula in some instances can be the same as the molecular formula. therefore this statement is incorrect.
B. Subscripts of empirical formulas can be reduced
empirical formula gives the simplest ratios and the subscripts cannnot be further simplified therefore this is incorrect
C. Molecular formulas can be determined from empirical formulas
using the empirical formula, the molecular formula can be determined. therefore its correct.
D. They both show the actual ratio of elements for a compound
only the molecular formula gives the actual ratio of elements whereas the empirical formula gives the simplest ratio of elements. this statement is incorrect
The correct statement is C.
Answer:
Molecular formulas can be determined from empirical formulas.
Explanation:
CuO(s) + H₂(g) → Cu(s) + H₂O(l)
CuO(s) + H₂(g) → Cu(s) + H₂O(l)