What types of pros and cons might you need to consider when evaluating different energy sources, such as oil, gas, solar, and wind?

Answer:

mass=8,640g

Explanation:

\(n = \frac{mass}{molar \: mass} \)

where

mole(n)= 120mol

Molar mass = Ar2

= 36×2

= 72g/mol.

Mass = ?

Therefore mass =

\(120 = \frac{m}{72} . \\ 120 \times 72 = m \\ 8640g = m\)

It is absorption of reflected, radiation from earth surface by atmospheric gases then radiation is then re-emitted, including back to earth surface is the best describes albedo is with respect to earths climate patterns.

What is albedo?

Albedo can be understood as the earth's reflectivity, or the amount of incoming sunlight that is reflected back into space. The main factors that affect global albedo are cloud cover and land-based ice cover, especially in places like Greenland and Antarctica that have substantial ice caps.

What is earth climate ?

The climate of a place refers to its long-term weather patterns. Hour by hour, day by day, month by month, or even year by year, the weather could change. An area's climate is thought to be determined by its weather patterns, which are normally tracked for at least 30 years.

Therefore, It is absorption of reflected, radiation from earth surface by atmospheric gases then radiation is then re-emitted, including back to earth surface is the best describes albedo is with respect to earths climate patterns.

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The statement is false. According to the Lewis theory, the formula for a compound of magnesium and sulfur is MgS, not MgS2 as stated.

The Lewis theory is a model used to predict the formation of covalent bonds between atoms, and it is based on the sharing of electrons between atoms to achieve a stable electron configuration. In the case of magnesium and sulfur, magnesium is a metal that tends to lose two electrons to form a cation with a +2 charge, while sulfur is a non-metal that tends to gain two electrons to form an anion with a -2 charge. The ionic compound formed by the combination of these ions has a 1:1 ratio of magnesium to sulfur ions, giving the formula MgS. Understanding the Lewis theory and the formation of chemical compounds is important in many areas of chemistry, including materials science, biochemistry, and environmental chemistry.

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Answer: the answer is a

Explanation:

I took the test and got it wrong because someone said the answer was divergent boundary and it’s wrong. I hate them I hate them I hate them. I hate it I hate school

Transform boundary is the type of tectonic plate boundary is a volcano least likely to occur.

Transform boundary is the type of tectonic plate boundary is a volcano least likely to occur.

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To control ice build-up on a heat pump outdoor coil in the heating cycle, a defrost control is attached to a large diaphragm.

The defrost control detects when ice has accumulated on the coil and activates a defrost cycle. This cycle reverses the flow of refrigerant, causing the outdoor coil to become hot, melting the ice.

The defrost control ensures that the heat pump operates efficiently by preventing excessive ice build-up, which can hinder its performance.

By attaching the defrost control to a large diaphragm, it allows for accurate detection of ice accumulation and prompt activation of the defrost cycle.

This helps to maintain optimal heat transfer and overall heat pump performance during the heating cycle.

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In the 100 ml volumetric flask, 17.3 mL of a 0.2514 M NaOH solution will be needed to fully neutralise the benzoic acid.

The first step in calculating the volume of NaOH required to neutralize the benzoic acid is to determine how many moles of benzoic acid are present in the 100 ml volumetric flask.

We can do this by dividing the mass of benzoic acid by its molar mass:

0.5312 g / 122.12 g/mol = 0.004346 mol benzoic acid

Since benzoic acid is a weak acid, we can use the Henderson-Hasselbalch equation to calculate the pH of its solution:

pH = pKa + log([A-⁻]/[HA])

The pKa of benzoic acid is 4.20. At the equivalence point of the titration, [A-] = [HA], so we can simplify the equation to:

pH = pKa + log(1) = pKa = 4.20

This means that the benzoic acid will be fully ionized at pH 4.20, and the volume of NaOH required to neutralize it can be calculated by using the balanced equation:

C₆H₅COOH + NaOH → NaC₆H₅COO + H₂O

The stoichiometric ratio of benzoic acid to NaOH is 1:1, so the moles of NaOH required to neutralize the benzoic acid is also 0.004346 mol.

To calculate the volume of 0.2514 M NaOH required to provide this number of moles, we can use the following equation:

moles = concentration x volume

0.004346 mol = 0.2514 mol/L x volume

volume = 0.0173 L = 17.3 mL

Therefore, 17.3 mL of 0.2514 M NaOH solution will be required to completely neutralize the benzoic acid in the 100 ml volumetric flask.

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=》 ᴛʜᴇʏ ʟᴏᴏᴋ ꜰᴏʀ ᴛʜᴇ ᴅᴇᴄᴀʏ ᴘʀᴏᴅᴜᴄᴛꜱ. ᴛʜᴇʏ ʟᴏᴏᴋ ꜰᴏʀ ᴛᴇʟʟᴛᴀʟᴇ ꜱɪɢɴꜱ ꜰᴏʀ ᴡʜᴇɴ 115 ᴅɪꜱɪɴᴛᴇɢʀᴀᴛᴇꜱ, ʙʏ ᴡʜᴀᴛ'ꜱ ᴄᴀʟʟᴇᴅ ᴀʟᴘʜᴀ ᴘᴀʀᴛɪᴄʟᴇ ᴇᴍɪꜱꜱɪᴏɴ. ᴡʜᴇɴ ᴛʜᴇʏ ꜱᴇᴇ ᴇɴᴏᴜɢʜ ᴏꜰ ᴛʜᴏꜱᴇ ꜱɪɢɴᴀʟꜱ, ᴛʜᴇʏ ᴄᴀɴ ꜱᴀʏ ᴛʜᴇʏ ᴘʀᴏʙᴀʙʟʏ ꜰᴏʀᴍᴇᴅ ᴀ ɴᴇᴡ ᴇʟᴇᴍᴇɴᴛ.

Answer:

bonding electron

Explanation:

because they will bond together.

Answer:

CNS (central nervous system)

Explanation:

The central nervous system is responsible for integrating sensory information and responding accordingly.

Neurons (specialized cells of the nervous system ) send signals along thin fibers called axons and communicate with other cells by releasing chemicals called neurotransmitters at cell-cell junctions called synapses.

The chemical P2 refers to the diphosphorus molecule, which is a compound made up of two phosphorus atoms bonded together.

Diphosphorus, also known as P2, is a chemical compound composed of two phosphorus atoms covalently bonded together. It is a highly reactive and unstable molecule that is rarely encountered in its pure form. Diphosphorus is an allotrope of phosphorus, meaning it is a different structural form of the same element.

At room temperature, diphosphorus exists as a colorless, odorless gas with a molecular weight of 60.98 g/mol. It is highly reactive and can easily ignite when exposed to air, making it a fire and explosion hazard. Diphosphorus is also highly toxic and can cause severe burns and respiratory problems if inhaled.

Diphosphorus has a unique electronic structure with a triple bond between the two phosphorus atoms. This triple bond makes the molecule highly reactive and unstable, as it seeks to break apart and form more stable bonds with other atoms. As a result, diphosphorus is a useful starting material for the synthesis of other phosphorus-containing compounds.

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The final gas volume, O, could be either larger or smaller than 2.96 L, depending on the final pressure and temperature. While heating the gas to a higher temperature, O could be larger than 2.96 L, but it could also be smaller.

The final gas volume, O, could be either larger or smaller than 2.96 L, depending on the final pressure and temperature. To understand why, we can look at the ideal gas law equation, PV = nRT. In this equation, P represents pressure, V represents volume, n represents the number of moles of gas, R is the gas constant, and T represents temperature.

Let's analyze the situation given in the question. We have a sample of xenon gas at a temperature of 306 K and a pressure of 0.847 atm, occupying a volume of 2.96 L. Now, if the pressure of the gas is decreased, while at the same time it is heated to a higher temperature, the final gas volume, O, could be either larger or smaller than 2.96 L.

If we decrease the pressure while keeping the temperature constant, according to Boyle's law, the volume of the gas will increase. So, in this case, O would be larger than 2.96 L. However, if we simultaneously increase the temperature while decreasing the pressure, the situation becomes more complex. The combined effect of the pressure decrease and temperature increase could lead to different outcomes for the final volume.

For example, if the pressure decrease is significant and the temperature increase is relatively small, the volume may still increase, resulting in O being larger than 2.96 L. On the other hand, if the pressure decrease is small and the temperature increase is significant, the volume may actually decrease, resulting in O being smaller than 2.96 L.

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The classification of the metals is;

Main group/ representative metals - Tl

Main group non metal - Se, Rn

Main group metalloid - As

Transition metal - Mo

Inner transition metal - Ru, Eu

The periodic table is a classification of elements according to their atomic numbers. We know that elements are arranged in the periodic table in order of increasing atomic numbers of the elements.

Let us now classify each element as required;

Main group/ representative metals - Tl

Main group non metal - Se, Rn

Main group metalloid - As

Transition metal - Mo

Inner transition metal - Ru, Eu

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Answer:

A precipate is formed as a result of double displacement reaction.

Explanation:

When two subsatances in solution react they yield a solid and an aqueos compound.

Answer:

*it can cause the atom to become and ion

Answer:

hope it helps

Explanation:

It is polar. That is why water sticks to your skin, unlike wax, a nonpolar substance.

The positively charged center in an atom is called as Nucleus. It is made up of positively charged protons and neutral sub-atomic particle called as neutrons.

What is meant by protons ?

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Answer:

e

Explanation:

Answer: pH=−log(3.1×10−3M)=2.508638306 =2.51

Explanation:

There are two ways you can do this. The easy way is to realize that

HCl

is a strong acid, so its dissociation is considered complete, and

[HCl]=[H+].

EASY WAY

Recall:

pH=−log[H+]

From the knowledge that

pH=−log[H+]=−log[HCl], we can say:

pH=−log(3.1×10−3M)=2.508638306 =2.51

The ionization constant for a weak acid, HA, that is 1.60% ionized in 0.0950 M solution Is 2.47 x 10⁻⁵. Option e is correct.

In this case, we are given that the weak acid HA is 1.60% ionized in a 0.0950 M solution. This means that only 1.60% of the HA molecules have dissociated into their conjugate base (A-) and a hydrogen ion (H+).
To calculate Ka, we need to first find the concentrations of HA, A-, and H+ at equilibrium. Since HA is a weak acid, we can assume that the initial concentration of HA is equal to its equilibrium concentration (since only a small amount dissociates). Therefore, [HA] = 0.0950 M x (1 - 0.0160) = 0.0931 M.
Since HA dissociates into A- and H+, the equilibrium concentration of A- is equal to the equilibrium concentration of H+. Let x be the amount of HA that dissociates at equilibrium, then [A-] = [H+] = x. The equilibrium concentration of HA is then [HA] - x.
The equation for the dissociation of HA is: HA ⇌ A- + H+
The equilibrium expression is: \(Ka=\frac{[A-][H+]}{[HA]}\)
Substituting in the concentrations at equilibrium, we get:
\(Ka=x^{2} /(0.0931-x)\)
Since HA is only 1.60% ionized, x is very small compared to the initial concentration of HA. Therefore, we can assume that 0.0931 - x ≈ 0.0931.
Simplifying the equation, we get:
Ka = x² / 0.0931
We are now left with the task of finding x, which is the amount of HA that dissociates at equilibrium. We can use the approximation that x is very small compared to the initial concentration of HA, so we can assume that x ≈ [H+] ≈ [A-].
Therefore, x = 1.60% x 0.0950 M = 0.00152 M.
Substituting this value into the equation for Ka, we get:
Ka = (0.00152 M)² / 0.0931 M = 2.47 x 10⁻⁵
Therefore, the answer is e) 2.47 x 10⁻⁵.

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Answer:

Objects that can emit light energy by themselves are known as luminous objects. Objects that cannot emit light energy by themselves are known as non-luminous objects.

Explanation:

Explanation:

Luminous objects:- The objects that can emit light energy by themselves are known as luminous objects.

Objects like the sun that give out or emit light of their own are luminous objects.

Other examples of luminous bodies are Electric bulb, torch etc.

Non-luminous objects:- the objects that can not emit light energy by themselves are known as Non- luminous objects.

Objects like the moon that do not give out or emit light of their own are Non- luminous objects.

Moon is an example of a non-luminous object as we can see the moon because it reflects light from the sun.

Other examples of Non luminous bodies are pen, pencil, chair, wood etc.

Luminosity – It is defined as the luminous intensity in a particular direction; or we can say it is the apparent brightness of an image.

The brightness of a star is defined as the total energy radiated in unit time. It is related to the surface area (A) and the effective temperature (TT) ( the temperature of a black body having the same radius as the star and radiating the same amount of energy per unit area in one second ) by a form of Stefan’s law, here is given by

⇒L=AσT4⇒L=AσT4

where 

σ is the Stefan’s constant and L is the luminosity.

Note:

The laptop screen, mobile screen you are looking at right now is luminous but the page of your book is a non-luminous object, which is why you need a light on to read it.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of gold = 30 cm³

density = 19 g/cm³

The mass is

mass = 19 × 30

We have the final answer as

Hope this helps you

Answer:

40.34 g

Explanation:

First, we divide the heat to release by the heat of combustion to obtain the required moles of compound:

541.20 kJ/(1160.00 kJ/mol) = 0.4665 mol

So, we have to burn approximately 0.47 mol of the compound. We convert the moles to mass in grams by using the molar mass:

mass = molar mass x moles = 86.47 g/mol x 0.4665 mol = 40.34 g

Therefore, you must burn 40.34 grams of the compound to release 541.20 kJ of heat.

To perform the procedure, slowly add the calculated amount of 0.2 F AgNO3 from a buret while maintaining constant stirring. Additionally, incorporate a 10% excess of AgNO3 as directed by the instructor.

In this procedure, the objective is to add a specific amount of 0.2 F AgNO3 solution with constant stirring. The use of a buret allows for precise control over the volume being added. By adding the solution slowly, the reaction can be monitored and controlled more effectively.

Furthermore, it is mentioned that a 10% excess of AgNO3 should be added. This means that an additional 10% of the calculated amount of AgNO3 should be incorporated. The purpose of this excess is to ensure that all the reactants are fully consumed, promoting a complete reaction and maximizing the desired outcome.

The instructor will provide the 0.2 M AgNO3 solution, which is a solution with a known concentration. This concentration allows for accurate calculations of the required volume to achieve the desired amount of AgNO3.

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8.  The pressure of the gas in the container is 369.7 mmHg.

9. The new pressure of the gas in atmospheres is 1.47 atm

10. The temperature in Kelvin will 0. 1243 moles of fluorine exert a pressure of 2. 02 atm at a volume of 0. 625 L is 124 K.

The ideal gas equation is expressed as :

P V = n R T

8. The gas law is :

P₁ V₁ = P₂ V₂

P₂ =  P₁ V₁ / V₂

P₂ = ( 256.4 × 362 ) / 251

     = 369.7 mmHg

9. P₁ V₁ / T₁ = P₂ V₂ / T₂

P₂ = P₁ V₁ T₂ V₂T₁

P₂ = ( 1 × 32.4 × 352) / 28.4 × 273

    = 1.47 atm

The pressure is 1.47 atm

10. P V = n R T

T = P V / n R

T = ( 2.02 × 625 ) / 0.1243 × 0.082

T = 124 K

Thus, the temperature is 124 K.

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Match each subatomic particle with the correct descriptions

Has a positive charge - proton

Has a negative charge - electron

Has a neutral charge = neutron

Found in nucleus of atom - proton and electron

Mass of 1 AMU - proton and neutron

Subatomic particle are the particle which is smaller than atom in size or of or relating to the inside of the atom

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(a) When more gas is added, the number of moles of the gas increases, and  the total pressure of gas inside same vessel will increase.

(b) When the conatiner's volume is increased, the total pressure of gas inside the vessel will decrease.

The ideal gas law of general gas equation, can be used to describe the behavior of an ideal gas.

The ideal gas law is given as;

PV = nRT

where;

When more gas is added, the number of moles of the gas increases, and  the total pressure of gas inside same vessel will increase.

When the conatiner's volume is increased, the total pressure of gas inside the vessel will decrease.

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Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state