10. In a household radiator, 1000.g of steam at 100.°C condenses (changes from gas to
liquid). How much heat is released?

Answer:

may be mp3 player......

Answer:

mp3 player

Explanation:

Neon sign contains Neon

Flash camera contains Xenon

Helium balloon contains Helium

The maximum solubility of Ag₂CO₃ = = 1 x 10⁻⁵

Given

0.02 M Na₂CO₃

Ksp of  Ag₂CO₃ is 8 x 10⁻¹²

Required

The solubility of Ag₂CO₃

Solution

Ag₂CO₃ ⇒ 2Ag⁺ + CO₃²⁻

s                  2s        s

s = solubility

Ksp Ag₂CO₃ = [Ag⁺]² [CO₃²⁻]

Ksp Ag₂CO₃ = (2s)².s

Ksp Ag₂CO₃ = 4s³

In 0.02 M Na₂CO₃ ⇒ 2Na⁺ + CO₃²⁻⇒ [ CO₃²⁻]=0.02, so Ksp Ag₂CO₃ :

8 x 10⁻¹² = [2s]² [0.02]

8 x 10⁻¹² = 4s² [0.02]

4s² = 8 x 10⁻¹² / 2 × 10⁻²

4s² = 4 x 10⁻¹⁰

s² = 1 x 10⁻¹⁰

s = √1 x 10⁻¹⁰

s = 1 x 10⁻⁵

A plant may go through a physiological response known as thermomorphogenesis in response to a heat stimulus. Option D.The plant grows tall. is correct.

This response may cause the plant to grow and develop in a variety of different ways, including enhanced stem elongation or modifications to the morphology of the leaves. As a result of enhanced stem elongation brought on by heat stress, plants can generally grow taller. This adaptation enables the plant to go away from the heat source and more easily absorb cooler air.

It is unusual for a plant to lose all of its leaves in response to a heat stimulation because this would mean a large loss of resources for the plant. Similar to how producing large fruit is not a usual reaction to heat stress, this is because the plant's energy resources might be diverted from reproduction to survival.

Heat stress may cause flowers to drop their petals, although this is not a universal reaction and would depend on the particular plant type and climatic factors.

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First, let's write the balanced chemical reaction:

2 H2O2 ---MnO2--> 2 H2O + O2

This reaction is a b. Decomposition Reaction of hydrogen peroxide.

Step 1. Let's transform 2.11 mg of H2O2 into moles using the following equation mole = mass / molar mass

Step 2. We are going to use the equation proportion to calculate the quantity in moles of each compound.

Step 3. We are going to transform moles into grams of each compound using the following equation: mass = mole x molar mass

Step 1.

We need to transform 2.11 mg to g. We just need to divide by 1000,

So: 2.11 x 10^-3 g of H2O

mole = 2.11 x 10^-3/34.02

mole = 6.20 x 10^-5 moles

Step 2.

2 moles of H2O2 ---- 2 moles of H2O

6.20 x 10^-5 moles ---- x moles of H2O

x = 6.20 x 10^-5 moles of H2O

2 moles of H2O2 ---- 1 moles of O2

6.20 x 10^-5 moles ---- x moles of O2

x = 3.10 x 10^-5 moles of O2

Step 3.

molar mass of O2 : 32 g/mol

molar mass of H2O: 18 g/mol

mass of H2O = 6.20 x 10^-5 x 18 = 1.12 x 10^-3 g

mass of O2 = 3.10 x 10^-5 x 32 = 9.92 x 10^-4 g

Option 1 is correct. There are three types of UV radiation: UVA, UVB, and UVC. UVC has the shortest wavelength, around 100-280 nm, but is mostly absorbed by the Earth's atmosphere and doesn't reach the surface. UVB has a wavelength of 280-320 nm and is responsible for sunburns and skin damage. UVA has the longest wavelength, around 320-400 nm, and can penetrate deeper into the skin, causing aging and wrinkling.

Option 2 is incorrect because UV radiation, in general, can be damaging to the Earth's surface, causing skin cancer, harming plant life, and contributing to climate change.

Option 3 is partially correct because UV radiation with a wavelength of 300 nm falls within the UVC range, but it's important to note that this type of radiation is mostly absorbed by the ozone layer before reaching the Earth's surface.

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Answer: 6Fe + 6HCl → 3FeCl3 + 3H2

Explanation:

The equation for the reaction is: 6Fe + 6HCl → 3FeCl3 + 3H2

The relative atomic mass of iron is 55.85. To calculate the amount of hydrogen chloride, we need to first calculate the moles of iron that is reacting. This can be done by dividing the mass of iron (6.16 g) by its molar mass (55.85 g/mol). This gives us 0.11 mol of iron.

Since the reaction is a 1:1 ratio, we know that the same amount of moles of hydrogen chloride will be needed. Thus, 0.11 mol of hydrogen chloride is needed. To calculate the mass of hydrogen chloride, we need to multiply the moles of hydrogen chloride (0.11 mol) by its molar mass (36.45 g/mol). This gives us 4.01 g of hydrogen chloride.

Therefore, the relative atomic mass of iron is 55.85 and the mass of hydrogen chloride needed for the reaction is 4.01 g.

The circulating water through a chiller is essential for efficient and effective cooling in many industrial and commercial applications.

Water must be circulated through a chiller for several reasons. First and foremost, a chiller is a device used to remove heat from a liquid via a refrigeration cycle. In many industrial and commercial applications, water is used as a cooling agent to remove heat generated by equipment or processes. The water is then circulated through the chiller, where it is cooled and returned to the system to continue its cooling function.

Circulating water through a chiller also helps to maintain consistent temperatures and prevent overheating. It allows for precise temperature control and helps to prevent damage to equipment due to excess heat. Additionally, circulating water through a chiller can improve energy efficiency by reducing the amount of energy required to cool water. This is because the chiller is designed to remove heat from the water more efficiently than other cooling methods.

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2-chloro-2-methyloctane of the following compounds is most likely to undergo rearrangement in a solvolysis reaction.

The correct option is B.

The action of a triglycerides with a straightforward alcohol, such as methanol or ethanol. to produce the methyl or benzyl esters of the fatty acid as well as glycerol, is an illustration of a solvolysis reaction. As a result of the interchange of the alcohol fragments, this reaction is more frequently referred to as a transesterification reaction.

Alkyl halides are hydrolyzed through a solvolysis process, which is a nucleophile reaction. Similar to nucleophilic substitution reaction two, the nucleophile, solvent, and leaving group all have an effect on SN1 (Unimolecular Nucleophilic Substitution) reactions (SN2).

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2-chloro-2-methyloctane of the following compounds is most likely to undergo rearrangement in a solvolysis reaction.

The correct option is B.

The action of a triglycerides with a straightforward alcohol, such as methanol or ethanol. to produce the methyl or benzyl esters of the fatty acid as well as glycerol, is an illustration of a solvolysis reaction. As a result of the interchange of the alcohol fragments, this reaction is more frequently referred to as a transesterification reaction.

Alkyl halides are hydrolyzed through a solvolysis process, which is a nucleophile reaction. Similar to nucleophilic substitution reaction two, the nucleophile, solvent, and leaving group all have an effect on SN1 (Unimolecular Nucleophilic Substitution) reactions (SN2).

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According to the question the final temperature of the mixture is 305.7 K.

Energy is the ability to do work. It is present in many forms, such as heat, light, sound, electricity, and chemical energy. Energy can be transferred from one form to another, or it can be converted from one form to another. Energy can be used to power machines, heat homes, light up cities, and create new materials.

Before mixing:

Heat energy = mass x specific heat capacity x change in temperature

Heat energy before mixing = (27.0 g)(4.184 J/g⋅°C)(285 K - 273 K) + (47.0 g)(4.184 J/g⋅°C)(320 K - 273 K)

Heat energy before mixing = 1040 J + 7012 J = 8052 J

After mixing:

Heat energy = mass x specific heat capacity x change in temperature

Heat energy after mixing = (74.0 g)(4.184 J/g⋅°C)(T - 273 K)

Heat energy after mixing = 8052 J

Therefore,

(74.0 g)(4.184 J/g⋅°C)(T - 273 K) = 8052 J

T = (8052 J / (74.0 g)(4.184 J/g⋅°C)) + 273 K

T = 305.7 K

Therefore, the final temperature of the mixture is 305.7 K.

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Answer:

base

Explanation:

The substance NaOH will be disassociated in ions of Na and OH.

Ahrrenius concept of base it's anything that dissolved in water produces OH.

Explanation:

Hey there!

The volume of an object: The volume of a water displaced by the object.

So, at first we need to find the volume of a water displaced by the object.

On the first figure the initial volume of a water is 60.5ml . Similarly, in second figure when an object is immersed then its volume is 90ml.

Now, volume of a water displaced =?

We have;

Displaced volume = final volume - initial volume.

Or, displaced volume = (90 - 60.5) ml.

= 29.5ml.

As per the condition, volume of a water displaced by the object = volume of an object.

Therefore, the volume of an object is 29.5ml.

Hope it helps...

The Maxwell distribution of velocities describes the distribution of speeds of gas molecules at a given temperature. It is based on the kinetic theory of gases and provides insights into the behavior of gas molecules.

As the molecular mass of a gas increases, several characteristics of the Maxwell distribution change. Firstly, the spread of speeds widens. This means that the range of velocities observed for heavier gases becomes broader compared to lighter gases. In other words, the distribution of speeds becomes more spread out Secondly, fewer molecules have speeds close to their average speed. The average speed of gas molecules is determined by the temperature, but as the molecular mass increases, the likelihood of individual molecules having speeds very close to the average decreases. This suggests that there is a greater dispersion or variation in the speeds of molecules in heavier gases. Lastly, as the molecular mass increases, a higher proportion of molecules have very high speeds. This means that heavier gas molecules are more likely to exhibit velocities that are significantly higher than the average speed. This trend can be attributed to the increased mass of the molecules, which affects their kinetic energy and consequently their speeds.

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Answer:

Hello! your answer is A,C, and D!

Explanation:

These are things only females would do/have, I hope I helped and good luck!

Have a wonderful day/night!

Answer:

38.7 g

Explanation:

First we convert 27.3 grams of C₈H₁₈ into moles, using the given molar mass:

Then we convert 0.239 moles of C₈H₁₈ into moles of H₂O, using the stoichiometric coefficients of the reaction:

Finally we convert 2.151 moles of H₂O into grams, using water's molar mass:

Answer:

A. The total mass of the reactants in a reaction equals the total mass of the product(s).

Explanation:

The law of conversation of matter tells us that in a chemical reaction, matter is never created or destroyed, it's simply converted from one form to another. So the mass of reactants should always equal the mass of the products in a chemical reaction.

The difference in binding energy per nucleon between 23/11 Na and 23/12 Mg can be calculated by finding the total binding energy for each isobar and dividing it by the respective number of nucleons.

To calculate the difference in binding energy per nucleon between the isobars 23/11 Na and 23/12 Mg, we need to find the total binding energy for each isobar and then divide it by the respective number of nucleons.

The atomic mass of 23/11 Na is 23, which means it has 23 nucleons (protons and neutrons). The atomic number is 11, indicating it has 11 protons.

The atomic mass of 23/12 Mg is also 23, so it has 23 nucleons. However, the atomic number is 12, indicating it has 12 protons.

We can use the equation:

Binding Energy per Nucleon = (Total Binding Energy) / (Number of Nucleons)

To find the total binding energy, we can consult a table or use an approximate average value. Let's assume the average binding energy per nucleon for both elements is 8.5 MeV (million electron volts).

For 23/11 Na:

Binding Energy per Nucleon = (Total Binding Energy of Na) / (Number of Nucleons)

                         = (8.5 MeV) / (23 nucleons)

For 23/12 Mg:

Binding Energy per Nucleon = (Total Binding Energy of Mg) / (Number of Nucleons)

                         = (8.5 MeV) / (23 nucleons)

The difference in binding energy per nucleon can then be calculated by subtracting the value for Na from the value for Mg.

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The partial pressures of NO2, O2, and N2 can be found by multiplying the total pressure by the mole fraction of each gas component. The partial pressures of NO2, O2, and N2 are 0.60 atm, 0.66 atm, and 0.74 atm, respectively

Mole fraction is a unitless quantity used to express the ratio of the number of moles of a particular substance to the total number of moles in a mixture. It is defined as the ratio of the number of moles of a component in a mixture to the total number of moles of all components in the mixture. The mole fraction of a component can range from 0 to 1, and the sum of the mole fractions of all components in a mixture is always equal to 1.

First, we need to calculate the mole fractions of each gas component:
The mole fraction of NO2 = 0.300 (given)
The mole fraction of O2 = 0.330 (given)
The mole fraction of N2 = 0.368 (given)
The mole fraction of trace gases = 0.002 (calculated as 1 - sum of other mole fractions)
Next, we can calculate the partial pressures of each gas component:
The partial pressure of NO2 = 2.00 atm x 0.300 = 0.60 atm
The partial pressure of O2 = 2.00 atm x 0.330 = 0.66 atm
The partial pressure of N2 = 2.00 atm x 0.368 = 0.74 atm
Therefore, the partial pressures of NO2, O2, and N2 are 0.60 atm, 0.66 atm, and 0.74 atm, respectively.

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0.00371 mol and 0.0244 mol are contained in each number of grams of fructose c6h12o6, molar mass 180.2 g/mol, a carbohydrate that is about twice as sweet as table sugar.

What do you mean by carbohydrates?
A carbohydrate is a biomolecule composed of carbon (C), hydrogen (H), and oxygen (O) atoms, with a hydrogen-oxygen atom ratio of 2:1 (as in water) and thus the empirical formula Cm(H2O)n. However, not all carbohydrates (for example, uronic acids and deoxy-sugars like fucose) meet this exact stoichiometric requirements, and not all substances that do meet this definition are automatically classified as carbs (e.g. formaldehyde and acetic acid).

To get number of moles,we have-

a)   Mole=wb/mb.            

=0.670/180.2

=0.00371 mol

b)  Mole=wb/mb

=4.40/180.2

=0.0244 mol

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Answer:

???

Explanation:

Acids are proton donors, whereas bases are proton recievers. The more positive the charge on an atom, the higher its acidity. More concentrated electrons = more stable base = weaker acid. But electronegativity = more concentrated electrons. And electronegativity = stronger acid.

Answer:Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics.

Explanation:

Answer:

Explanation:

Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. 

hope it helps!

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question we have

\(density = \frac{20}{4} = 5 \\ \)

We have the final answer as

Hope this helps you

Answer:

- 10.6° C

Explanation:

Given that,

In the aqueous sucrose solution,

Molality of the solution (m) = 5.7

Freezing point constant (K) = 1.86

To find,

The freezing point of the solution = ?

Method:

To find its freezing point, we will first find out if the solute demonstrates an electrolyte or not.

In case it is not, the van't Hoff factor i.e. ration of particles' concentration denoted by (i) would be taken as 1. So,

ΔT(change in temperature) = i * m * K              (putting the given values)

= 1 * 5.7 * 1.86

= 10.6° C

Thus, the freezing point equals to 0 - 10.6° C = -10.6° C.

Answer:

no

Explanation:

this experiment could not be replicated, because there are no specific measurements. the details would not be the same because it does not include the type of paper used nor the diameter, width or length. A guess of the measurements would be the only way to replicate this experiment but other then that, no you cannot.

A significant heat-trapping gas, or greenhouse gas, called carbon dioxide (CO2) is produced through the production and burning of fossil fuels like coal, oil, and natural gas as well as during wildfires and other natural processes like volcanic eruptions.

Thus, The first graph displays atmospheric CO2 measurements made recently at Hawaii's Mauna Loa Observatory without accounting for seasonal or natural variations.

The air bubbles trapped in ice sheets and glaciers over Earth's last three glacial cycles are used in the second graph to depict CO2 levels during those periods.

Human activities have increased atmospheric CO2 by 50% since the start of the industrial era (in the 18th century), bringing it to 150% of its value in 1750.

Thus, A significant heat-trapping gas, or greenhouse gas, called carbon dioxide (CO2) is produced through the production and burning of fossil fuels like coal, oil, and natural gas as well as during wildfires and other natural processes like volcanic eruptions.

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The products of the given chemical equation is given serially 1) zinc nitrate and lead bromide,2) hydrogen chloride and copper bromide 3) sodium phosphate and potassium acetate .

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

Explanation:

Charlotte, driving at 60.2 mi/h, would travel approximately 344 feet during the 3.91 seconds that she looked at her phone.

To find out how far Charlotte traveled, we can first convert her speed to feet per second since we're given the time she looked at her phone in seconds. We know that 1 mile is approximately 5280 feet, so Charlotte's speed in feet per second is 60.2 miles per hour multiplied by 5280 feet over 3600 seconds (the number of seconds in an hour). This comes out to be approximately 88 feet per second.

Therefore, in the 3.91 seconds that Charlotte looked at her phone, she would've traveled 88 feet per second times 3.91 seconds, which equals roughly 344 feet.

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