Why does Earth get more energy from the sun than from all the other stars in the universe combined?

A.) The sun is much hotter than the other stars.

B.) The sun is much more dense than the other stars,

C.) The sun is much closer than the other stars.

D.) The sun is much larger than the other stars,

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cde PLZ BRAINLEST PLZ

Answer:

I am not sure but I think it is D

Brainliest please ;-)

Answer:

A

Explanation:

Answer:

A. Sorry if wrong, but if i'm right can you mark brailniest pls?

Answer:

hey jazmin! I have been on your friends list for a while on brainly, I thought I'd say hi.

Three of the following compounds are insoluble in water: SrSO4, AlPO4, and K2S.

Solubility in water depends on the nature of the compound and its ability to form hydrogen bonds with water molecules. Compounds that are composed of ions or polar molecules are typically more soluble in water than nonpolar molecules. LiC2H3O2 is a salt that dissociates into Li+ and C2H3O2- ions in water, and is therefore soluble. K2S is also a salt, but it forms S2- ions which are too large to effectively interact with water molecules, making it insoluble. SrSO4 and AlPO4 are both insoluble because they have low solubility product constants (Ksp) and do not dissociate into ions to a significant extent in water.

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2 (lithium acetate) is soluble in water.

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Option (b) is correct. The molarity of the resulting solution is 0.652 M. This is calculated using the expression of ideal gas equation and molarity.

12.7 l of argon at 33°c and 735 torr are dissolved in enough water to give a final volume of 0.750l. so,

P = 735.0 torr

 = (735.0/760) atm.

 = 0.9671 atm.

V = 12.7 L

T = 33.0 o C

 = (33.0+273) K

 = 306 K

We can find the  number of moles using ideal gas equation. The ideal gas law, also called the general gas equation, is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions. The ideal gas equation is,

         P * V = n*R*T

        0.9671 atm. * 12.7 L = n * 0.08206 atm. L/mole . K * 306 K

        n = 0.4891 mole

Now, we will calculate Molarity. Molarity or molar concentration is the number of moles of solute per liter of solution, which can be calculated using the following equation,

Molarity = number of mole / final volume

 = 0.4891 mole / 0.750 L

 = 0.652 M

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The average speed is approximately 19.0 kilometers per hour.

When we say the average speed is approximately 19.0 kilometers per hour, it means that over a given time period, the object or person in question traveled a total distance of 19.0 kilometers divided by the total time it took to cover that distance. In this case, the given speed is 19 kilometers per hour.

To calculate the average speed, we use the formula:

Average Speed = Total Distance / Total Time

In the given question, the speed is already mentioned as 19 kilometers per hour. So, we can conclude that the total distance covered is 19 kilometers.

However, to find the total time taken, we need more information. The question only provides the speed but not the duration of the journey. Without knowing the total time, we cannot determine the average speed accurately. Therefore, in the absence of further information about the time, we can only state that the average speed is approximately 19.0 kilometers per hour based on the given speed.

Average speed and how it is calculated by considering the total distance and total time traveled.

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Answer:

i have no clue whats going on here but imma act like i do.....

Explanation:

Answer:

Adenine=33%

Thymine=33%

Guanine=17%

Explanation:

the base pairs percentages must be the same

The relationship between atmospheric content and global warming is a key aspect of understanding climate change.

The Earth's atmosphere is composed of various gases, including carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water vapor. These gases, often referred to as greenhouse gases, act as a natural "blanket" by trapping heat radiated from the Earth's surface and preventing it from escaping into space. This process, known as the greenhouse effect, is essential for maintaining a habitable temperature on Earth.

However, human activities, particularly the burning of fossil fuels (such as coal, oil, and natural gas) and deforestation, have significantly increased the concentration of greenhouse gases in the atmosphere, particularly CO2. The increased atmospheric concentrations of these gases have enhanced the greenhouse effect, leading to an increase in the Earth's average surface temperature. This phenomenon is commonly known as global warming.

There is substantial scientific evidence supporting the current explanation for global warming. Multiple lines of evidence, including temperature records, ice core data, and computer modeling, have demonstrated a clear correlation between the rise in greenhouse gas concentrations and the increase in global temperatures over the past century. The Intergovernmental Panel on Climate Change (IPCC), a leading scientific body, has provided extensive assessments based on a comprehensive review of scientific research that consistently supports the link between human activities, greenhouse gas emissions, and global warming.

Furthermore, the impacts of global warming are already being observed worldwide. These impacts include rising sea levels, melting glaciers and polar ice caps, more frequent and intense heatwaves, changes in precipitation patterns, and shifts in ecosystems. These changes have significant implications for human societies, including risks to food security, water resources, biodiversity, and public health.

Efforts to mitigate global warming and its consequences involve reducing greenhouse gas emissions, transitioning to renewable energy sources, improving energy efficiency, and implementing sustainable land-use practices. Additionally, international agreements like the Paris Agreement aim to limit global warming to well below 2 degrees Celsius above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5 degrees Celsius.

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Answer:

(i) Ionization enthalpy:

Alkaline earths have higher ionization enthalpy values than alkali metals. This is because the atomic size of alkaline earths is smaller than that of alkali metals.

(ii) Basicity of oxides:

On dissolution in water, the oxides of alkali metals and alkaline earth metals form basic hydroxides. The basicity of alkali metal oxides is higher than that of alkaline earth metal oxides due to lower ionization enthalpy of alkali metals than that of corresponding alkaline earths. Due to this, the M-OH bond in alkali metal hydroxides can more easily ionize.

(iii) Solubility of hydroxides:

Alkaline earths have larger lattice energies than alkali metals due to small size and high charge. Hence, alkaline earth metal hydroxides have lower solubility than alkali metals.

Comparison between the alkali and alkaline earth metals are that alkali metals are soft, have high M.P. & shows magnetism and alkaline are hard, have low M.P. & no magnetism.

Alkali earth metals are those elements which are present in the first period of the periodic table and alkaline earth metals are those which are present on the second group of the periodic table.

Hence the comparison between them are discussed above.

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0.525 moles of bromide ions in 0.500 L of a 0.350 M solution of AlBr3. The answer (rounded to two significant figures) is (a) 5.00 mol.

The first step to solve this problem is to write the balanced chemical equation for the dissociation of AlBr₃ in water:

AlBr3(s) → Al3+(aq) + 3Br-(aq)

According to this equation, one mole of AlBr₃ produces three moles of Br- ions.

Next, we need to use the concentration and volume information given to calculate the number of moles of AlBr₃  present in the solution. We can use the formula:

moles = concentration × volume

moles of AlBr₃ = 0.350 M × 0.500 L = 0.175 moles

Finally, we can use the stoichiometry of the balanced equation to calculate the number of moles of Br- ions present in the solution:

moles of Br- ions = 3 × moles of AlBr₃

      = 3 × 0.175 moles = 0.525 moles

Therefore, there are 0.525 moles of bromide ions in 0.500 L of a 0.350 M solution of AlBr₃. The answer (rounded to two significant figures) is (a) 5.00 mol.

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The density of gasoline id 0.008 g/ml is 18.64 gram.

Density is defined as mass per unit volume it means that mass is present in one meter cube.

S.I unit of density is kg/meter^3.

Mathematically

Density = Mass/Volume.

In above question

Volume = 2330 mL

Density = 0.008 g/mL

Density = mass/ volume

So,

Mass = density x volume

Mass = 0.008 x 2330

Mass = 18.64 gram

Therefore, The density of gasoline id 0.008 g/ml is 18.64 gram.

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Equation 3.5 can be used to get the volume of a Zr cell as Venture capital = nAZr/PN A.

Now, for Absorption coefficient. Az = 91.22 h t and for Hc, n = 6 atomic nuclei cell. Vc = 6 atoms per unit cell, 91.22 g/mol, and 6.51 g/cm3 as a result.

Equation: What is it?

Those who are learning English Equation definition two expressions are identical if and only if (for example, 8 + 3 = 11 and 2x - 3 = 7) a complex circumstance or problem: assuming that two things are equivalent the process of comparing items

What is formula 1a?

Equation definition 1a: the process or act of equating c: a specific state of someone being equated Governmental organizations and the payment for them come into urgent consideration when there is a close relationship or identity. R.G. Tugwell 2a

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Answer:

20

Explanation:

calculated saturated solutions

The compounds A, B and C are ammonium chloride, ammonia gas and silver chloride respectively.

Ammonium chloride,  is a white crystalline solid which is soluble in water. On heating with sodium hydroxide it will produce ammonia gas, which is a colorless gas and has a odor or pungent smell.

So,  Ammonia gas will turn red litmus into blue as it's pH is 11.6.

When Ammonium chloride reacts with silver nitrate  in  presence of dilute Nitric acid ,  it produces Silver chloride and Ammonium nitrate

AgCl is soluble in Ammonia because it can form complexes which

makes it behave like an ion, making it soluble.

Therefore, Compound A is Ammonium chloride,

B is ammonia gas

and C is Silver chloride.

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The complete question is

A white solid A when heated with sodium hydroxide solution gives a pungent gas B which turns red litmus paper blue. The solid when dissolved in dilute nitric acid is treated with Silver nitrate solution to give white precipitate C, which is soluble in ammonia.

(A) What are the substance A, B, and C?

Answer:

A

Explanation:

The two ways in which humans have negatively affected groundwater are Fertilizers and pesticides.

Fertilizers were chemical substances that are applied to crops in order to boost their yield.

Pesticides are chemicals that are being used to keep pests at bay. Herbicides, insecticides, nematicides, and molluscicides are examples.

Fertilizers and pesticides applied to the land, manure from livestock as well as other animals, landfills, mining operations, even unintended releases such as chemical spills or storage tank leaks are all factors that affect groundwater quality.

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Answer:

65.21g

Explanation:

\((48.89 \div 100) \times 63.929 = 31.25 \\ (27.81 \div 100) \times 65.996 = 18.35 \\ (23.3 \div 100) \times 67.002 = 15.61 \\ 31.25 + 18.35 + 15.61 = 65.21\)

Answer: option c) the strongest base in aqueous solution is NaOH

Explanation:

the strongest base in aqueous solution is NaOH because strength of a base is determined by its ability to donate hydroxide ions (OH-) in solution. and NaOH dissociates completely in water to produce Na+ and OH- ions. The presence of a fully dissociated hydroxide ion makes NaOH a strong base.

While, HOC2H4OH and CH3OH are weak acids. HOC2H4OH is ethylene glycol and CH3OH is methanol are weak acid due to the presence of the   (-OH) group.

Also, NH3 (ammonia), is a weak base though it can accept H⁺ to form NH4+

The solubility of a compound in a particular solvent depends on several factors, including the polarity of the solvent and the solute. Nonane is a nonpolar solvent, which means that it cannot dissolve polar compounds effectively. In general, compounds with nonpolar properties are more soluble in nonane compared to polar compounds.

1-pentanol, ethanol and acetic acid are polar compounds because they contain a hydroxyl group (-OH) or carbonyl group (C=O) that makes them more soluble in polar solvents such as water. Benzene and ethyl methyl ketone are nonpolar compounds because they lack any polar functional groups and contain only carbon and hydrogen atoms.
Based on their polarities, we can predict that benzene and ethyl methyl ketone will be the most soluble in nonane because nonane is a nonpolar solvent. The polar compounds (1-pentanol, ethanol, and acetic acid) will not dissolve well in nonane due to their polarity. Acetic acid may have some solubility in nonane because it has a relatively small polar functional group and a large nonpolar hydrocarbon chain. In conclusion, the most soluble compound in nonane is likely to be benzene or ethyl methyl ketone, both of which are nonpolar. The polar compounds are not expected to be very soluble in nonane due to the nonpolar nature of the solvent.

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Answer:

kevin gates with his fine self.

Explanation:

Answer:

Today's classification is called Linnaean system of classification. Is is important because it is according to the data of evolutionary studies and modern data.

Explanation:

It classifies plants, animals, algae fungi , and bacteria in a specific groups. It is important because this classification is somehow verified by the genetics and molecular biology.

7 levels of Linnaean classification system.

Kingdom

/Phylum

Class

Order

Family

Genus

Specie

Answer:

-2

The charge on an oxygen ion is -2. An oxygen atoms contain six electrons in its valence electron shell.

Explanation:

In NH2Br, there are a total of 6 bonds. To determine the number of polar and non-polar bonds, we need to examine the electronegativity difference between the atoms involved in each bond.

In NH2Br, the central atom is nitrogen (N), and it is bonded to two hydrogen atoms (H) and one bromine atom (Br).

The N-H bonds are polar because nitrogen is more electronegative than hydrogen, creating a partial negative charge on nitrogen and a partial positive charge on hydrogen.

The N-Br bond is also polar because nitrogen is more electronegative than bromine, resulting in a partial negative charge on nitrogen and a partial positive charge on bromine.

Therefore, in NH2Br, there are 3 polar bonds (N-H, N-H, N-Br) and 3 non-polar bonds (H-H, H-H, Br-H).

To summarize:

Total bonds: 6

Polar bonds: 3 (N-H, N-H, N-Br)

Non-polar bonds: 3 (H-H, H-H, Br-H)

It's important to note that the polarity of a bond is determined by the electronegativity difference between the atoms involved. If the electronegativity difference is significant, the bond is considered polar; otherwise, it is considered non-polar.

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Answer:

Buoyancy.

Explanation:

Buoyancy is a force created by the water that is displaced by an object. It is directly proportional to the amount of water that is being displaced by an object.

Hence, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up.

The buoyancy of an object is given by the formula;

\(Fb = pgV\\\\But, V = Ah\\\\Hence, Fb = pgAh\)

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for the buoyancy of an object is Newton (N).

The van't Hoff factor for sodium chloride in the mystery liquid can be calculated based on the freezing point depression caused by its dissolution. By comparing the freezing point depression caused by sodium chloride to the freezing point depression caused by alanine, the van't Hoff factor can be determined.

Freezing point depression is a colligative property that depends on the number of solute particles in a solution. The van't Hoff factor (i) represents the number of particles a solute molecule dissociates into in a solution.

Given that the freezing point of the solution containing alanine is higher than the freezing point of pure solvent, it indicates that alanine does not dissociate into multiple particles when dissolved. Therefore, the van't Hoff factor for alanine is 1.

However, when sodium chloride is dissolved in the same mass of the mystery liquid, the freezing point of the solution is lower than the freezing point of the pure solvent. This suggests that sodium chloride dissociates into multiple particles when dissolved.

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