what is mass of sodium hydroxide NaOH is present in 0.25 mole of sodium hydroxide
pls be quick​

Answer:

People show more interest in personal broadcasting.

Explanation:

The art of oration (speaking) is being  replaced by personal broadcasting mean now people used webcam or camcorder for creating its own content and transmit it to other people through internet. Personal broadcasting provides audio and video to the individual that make it more interesting as compared to oration. People show more interest in personal broadcasting as compared to oration so that's why oration is replaced by personal broadcasting.

Answer:

I drew an amazing picture explaining everything....

Explanation:

Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!

−xXheyoXx

Answer:

You right!

Explanation:

Answer: Yes your right

The relative strengths of acids can be compared based on their acid dissociation constants (Ka), which are a measure of the extent to which an acid dissociates in solution to form H+ ions. Therefore, the formula for the strongest acid is HF.

The lower the pKa value, the stronger the acid. The Ka and pKa values for the three acids are:

Acid 1: nitrous acid, HNO2

Ka = 4.5 x 10^-4

pKa = 3.35

Acid 2: hydrofluoric acid, HF

Ka = 7.2 x 10^-4

pKa = 3.14

Acid 3: carbonic acid, H2CO3

Ka = 4.3 x 10^-7

pKa = 6.37

Comparing the pKa values, we can see that hydrofluoric acid is the strongest acid since it has the lowest pKa value. This means that hydrofluoric acid is the most likely to donate a proton and form H+ ions in solution.

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It would be most recommended to open all of the house's windows when the outdoor temperature is cooler than the indoor temperature. Option D is correct.

This is because opening the windows allows for air to circulate and cool down the inside of the house, provided that the outside air is cooler than the inside air. However, if the outside temperature is hotter than the inside temperature, opening the windows may actually make the inside of the house even hotter as it lets in warm air.

It would be better to keep the windows closed and use other methods such as fans or shades to keep the house cool. It's also important to consider the humidity levels outside, as opening the windows in humid conditions may increase the humidity inside the house and make it feel even warmer. Option D is correct.

The complete question is

Kamal is stuck at home on a hot day. The air conditioning system in his home is broken, so he does online research to find another way to cool down the house. One source advises that he open all of the house's windows, although it also warns him that this idea may not always work. In which of the following situations would it be most recommended to open all of the house's windows?

a) In a hot and humid climate

b) In a hot and dry climate

c) In a cold and humid climate

d) In a cold and dry climate

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Answer:

the first picture is of prophase and the second one is interphase

Explanation:

please Mark as BRAINLIEST

Answer:

The answer is energy levels

Explanation:

The process of a liquid becoming a gas is called boiling (or vapourization) and the process of a solid becoming a liquid is called melting.

Vaporization is the process of converting a liquid into a gas. It is also called evaporation. Since we know that the particles of a gas are moving faster than those of a liquid, an input of energy must be required for a liquid to become a gas.

Melting is a physical process that results in the phase transition of a substance from a solid to a liquid. During melting, the energy goes exclusively to changing the phase of a substance; it does not go into changing the temperature of a substance. Hence melting is an isothermal process because a substance stays at the same temperature.

Example 1: Industrially, salt is recovered from seawater by the process of vaporization. Wet clothes are dried up due to the process of vaporization. The process is used in many industrial processes for separating the components of a mixture.

Example 2: Ice to water - Ice melts back into the water when it is left out at temperatures above the freezing point of 32 degrees. Rocks to lava - Rocks in volcanoes can be heated until they are molten lava. Metal to molten liquid - Metals such as steel and bronze can be molten down.

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To solve this problem, we can use the Ideal Gas Law, which states that  the pressure inside the flask is 0.768 atm, rounded to the nearest thousandth.

A gas is a state of matter in which a substance has no fixed shape or volume and can expand indefinitely to fill any container in which it is placed. Gases are made up of molecules or atoms that are in constant, random motion and have no long-range order or cohesion.

Gases are compressible, meaning that their volume can be reduced by applying pressure, and they can also expand to fill any available space. The properties of gases are described by gas laws, which relate variables such as temperature, pressure, and volume.

Examples of gases include oxygen, nitrogen, carbon dioxide, and hydrogen. Gases are found in a wide range of natural and human-made environments, including the atmosphere, industrial processes, and many chemical reactions.

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Answer: \(\text{N}_{5}\text{O}_{10}\)

Explanation:

This means the molecular mass of nitrogen dioxide is \(14.0067+2(15.9994)=46.0055\) g/mol.

Dividing this molecular mass of the compound we need to find, we get that

\(\frac{230.05}{46.0055} \approx 5\).

So, the final answer is \(\boxed{\text{N}_{5}\text{O}_{10}}\)

Incandescent lamps function by using poor conductors, specifically a tungsten filament, that become hot due to electrical resistance.

They emit light as a result of this. When an electric current is passed through the filament, the electrons encounter resistance as they move, which generates heat. As the filament's temperature increases, it starts to emit visible light through a process called incandescence.

This phenomenon occurs because materials at high temperatures release energy in the form of electromagnetic radiation. In the case of incandescent lamps, the heat causes the tungsten filament to glow red or even white-hot, depending on the lamp's operating temperature. The light emitted by the filament ranges from warm, yellow tones to cooler, white hues, depending on the lamp's design and power.

While incandescent lamps have been widely used for many years, they are known to be energy inefficient. This is because the majority of the electrical energy consumed by the lamp is emitted as heat rather than light. As a result, more energy-efficient alternatives, such as compact fluorescent lamps (CFLs) and light-emitting diode (LED) bulbs, have been developed and are gradually replacing incandescent lamps in various applications. These modern alternatives are designed to produce more light using less energy, reducing energy consumption and contributing to a more sustainable future.

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Answer:

\(40 \times 1 = 40\)

Answer:

The calculated volume of the gas (in mL) at 20.0c and 740.mmHg when volume of gas collected at temperature of  11.0° C and pressure of 710 mmHg measures 0.148L is 78. 1 mL

Explanation:

The combined gas law combines the three gas laws, Boyle's law, Charles's law and Gay- Lussac's law. It states that the ratio of the product of pressure and volume and the absolute temperature of a gas is equal to a constant.

P V ÷ T = K

P1 × V1 ÷ T1 = P2× V2 ÷ T2

Parameters :

P1 = Initial pressure = 710.0 mmHg

V1 = 0. 148 L , converting it to mL = 0.148L × 1000 = 148 mL

T1 = Initial temperature = 11° C

P2 = Final pressure = 740 mmHg

V2 = Final volume in mL

T2 = Final temperature = 20° C

Calculations:

V2 = P1 × V1 × T2 ÷ P2 × T1

V2 = 710 × 148 × 11 ÷ 740 × 20

V2 = 1155880 ÷ 14800

V2 = 78.1 mL

Therefore, the calculated volume is 78.1 mL

Water 3.0 deals mainly with sewage treatment. The primary aim of this project is to reduce the harmful impacts of chemical pollutants from industrial and agricultural activities on natural water resources.

Currently, used wastewater treatment technologies can break down some of the chemicals in wastewater but not all of them. Chemicals that are not broken down are referred to as persistent organic pollutants. These chemicals persist in the environment for long periods, and they can cause severe damage to aquatic life and human health.
Currently, the primary challenge facing water treatment technologies is the removal of persistent organic pollutants such as pesticides, pharmaceuticals, and endocrine-disrupting chemicals from wastewater.

These pollutants are generally water-soluble and resist microbial degradation, making them hard to remove from wastewater using current water treatment technologies. For example, conventional activated sludge treatment used in wastewater treatment plants does not remove some persistent organic pollutants from wastewater.
Failure to remove these pollutants from wastewater can have significant environmental and health impacts.

For example, pharmaceutical chemicals can cause antibiotic resistance, while endocrine-disrupting chemicals can cause birth defects, cancer, and other health problems.

Therefore, there is a need to improve wastewater treatment technologies to remove persistent organic pollutants from wastewater.
In conclusion, wastewater treatment technologies can break down some chemicals but not all. Chemicals that are not broken down are persistent organic pollutants and pose a significant risk to the environment and human health. Therefore, it is important to develop wastewater treatment technologies that can remove these pollutants from wastewater.

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14.0067 u  is the molecular mass of Nitrogen.

What is molecular mass ?

Molar mass is the mass of one mole of a substance, defined as its atomic or molecular mass in grams.  It is defined as the number of units (atoms, molecules, ions, etc.) in a substance that contains the same number of units as 12 grams of pure carbon-12. The molar mass of a substance is important because it provides a conversion factor between the  mass of a substance and the number of moles of a substance, allowing chemical reactions and composition of compounds to be more easily calculated. Molar mass can be calculated by summing the atomic masses of all atoms in a molecule of a substance. For example, the molar mass of water (H2O) is 18.015 g/mol. This means that 1 mole of water weighs 18.015 grams .

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More than one, but not all, of the reactions described above could occur

Electrolyte solutions conduct electricity as a result of the movement of electrons inside the solution.

A solution that is electrically conductive and typically contains ions, which are atoms or molecules that have gained or lost electrons, is referred to as an electrolyte. This leads to frequent use of the term "ionic solutions," however there are some instances where the electrolytes are not ions.

The three different kinds of strong electrolytes are salts, strong bases, and strong acids.

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A business can incorporate all of these options to align with green design principles.

Employees can produce fuel, heat, or power from renewable sources for use inside their workplace. Wind, biomass, geothermal, solar, ocean, hydropower, landfill gas, and municipal solid waste are a few examples of these sources.

The practise of taking into account and limiting environmental effect while producing goods is known as sustainable design or green design. Green design principles provide businesses a variety of opportunities to cut waste, repurpose resources, and recycle goods and materials.

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When Aaron took Organic Chemistry he discovered that the work was too difficult for him. That is, the level of difficulty was very high for Aaron.

Organic chemistry is the branch of chemistry that deals with the compounds of carbon and hydrogen, known as organic compounds. These compounds are widely found in nature, and can be either naturally occurring or man-made. Organic chemistry is concerned with the structure, properties, and reactions of organic compounds, as well as the preparation and isolation of these compounds from natural sources. It also includes the study of synthetic organic compounds and their application in various fields such as medicine, agriculture, and industry. Organic chemists use a variety of methods and techniques to study the structure of organic compounds and understand their behavior in different environments.

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Stoichiometrically, the mole ratio of C3H8 to O2 to CO2 to H2O is 1:5:3:4.

According to the equation, the mole ratio of C3H8 to O2 is 1:5. This means that 1 mole of C3H8 will require 5 moles of O2 for complete reaction.

Also, 1 mole of C3H8 when completely burned in 5 moles O2, will produce 3 moles of CO2 and 4 moles of H2O.

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Flask 3 has higher mean square value.

Flask 1 (CO) – P1 = 760 torr

Flask 2 (N2) – P2 = 250 torr

Flask 3 (H2) – P3 = 100 torr

All these have same volume and temperature

•  Average Kinetic Energy:

(K.E.) avg = 3/2 RT

(K.E.) avg ∝ T, here T = Temperature

And all the flask has same temperature

So, they all have same Kinetic Energy.

The root mean square speed (C.R.M.S.) is given by,

CRMS = √ (3RT/Mo) = √ (3PV/Mo), where Mo is the molar mass

From above CRMS ∝ √ (P/Mo)

So, higher molar mass gas molecule has lower crms.

CO = Mo = (Mo)c + (Mo)o = 12 + 16 = 28

N2 = Mo = 2(Mo)N = 2 * 14 = 28

H2 = Mo = 2(Mo)H = 2 * 1 = 2

(Mo): - H2 < N2 = CO

Hence CRMS for Flask 3 > Flask 2 > Flask 1.

So, FLASK 3 has highest CRMS

•  Rate of effusion of gas (r) is inversely proportional to square root of density (d)

r ∝ 1 / √d

r ∝ 1 / √ Mo

therefore density (d) = Mo / 2

Mo: H2 < CO = N2

r: H2 > CO = N2

Flask 3 effuses higher than flask 1 & 2.

Thus,

Flask 3 has higher mean square value.

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Answer:

allylcyclopentane.

it may have other names but this is the most oniwn for this compound

Answer:

The structure of a nucleus encompasses the nuclear membrane, nucleoplasm, chromosomes, and nucleolus. The nuclear membrane is a double-layered structure that encloses the contents of the nucleus. ... A fluid-filled space or perinuclear space is present between the two layers of a nuclear membrane.

Explanation:

An atom is stable if the forces among the particles that makeup the nucleus are balanced.

The element with the highest melting point is bromine (Br2). As a result, choice (A) is the right one.

The attractive and repellent forces that form between the molecules of a substance are known as intermolecular forces. The majority of the chemical and physical characteristics of matter are governed by these forces. Vander Waals forces are the intermolecular forces that hold molecules together.

Intermolecular forces are those that exist within the molecules themselves. Intermolecular forces keep the particles of solids and liquids bound together.

Dipole-Dipole Interactions, Ion-Dipole Interactions, Ion-Induced Dipole Interactions, Dipole-Induced Dipole Interactions, and Dispersion Forces are the intermolecular forces.

A significant amount of energy will be needed to break bonds as atom sizes grow because of the stronger intermolecular force. Since among all the elements, bromine is the largest in size. Bromine will therefore have the highest melting point.

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The standard molar enthalpy for the reaction C(s) + ½ O2(g) → CO(g) is -111KJ.

Molar enthalpy is the amount of energy per mole. In light of this, the primary distinction between enthalpy and molar enthalpy is that the former refers to the total heat content of a thermodynamic system, whereas the latter refers to the total heat per mole of reactant in the system.

C(s) + O₂(g) → CO₂(g)    ΔHO = -394 kJ ----(1)

CO₂(g) → CO(g) + 1/2O₂(g)      ΔHO = +283 kJ -----(2)

Adding 1 & 2

C(s) + ½ O₂(g) → CO(g)  

ΔHO = -394 kJ + 283 kJ

ΔHO = -111KJ.

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Complete question is " Find the standard molar enthalpy for the reaction C(s) + ½ 02(g) → CO(g)

Given that

C(s) + O2(g) → CO2(g) AHO = -394 kJ

CO2(g) → CO(g) + ¹/2O2(g) AHO = +283 kJ ".

Answer:

8 and 0

Explanation:

8 and 0 together make 80

Answer:

E)Li

Explanation:

Electronegativity is the tendency of an atom to attract a pair of bonding electrons. In the periodic table, electronegativity increases across the period and decrease down the group.

This means the element at the top of the group would have the highest electronegativity.

The correct option is;

E)Li

Answer:

Have a Nice Best Day : )

It's five minutes before your lab period begins and you realize that you are not properly dressed for lab. You could F. A, B and D

Return to your residence to get the proper clothing, if time permits. This is a good option if you live close to the campus and can quickly change into the appropriate clothing without wasting too much time. However, if you live far away or have a long commute, this may not be a practical option.

Go to the Student Stores to purchase the proper clothing. This is a good option if the Student Stores are nearby and if they carry the clothing that you need. However, this may not always be the case, and you may end up wasting time and money trying to find suitable clothing.

Ask a friend to bring proper clothing, if time permits, is a good option if you have a friend who is nearby and willing to help. However, this may not always be the case, and you may end up causing inconvenience to your friend by asking them to drop everything and bring you the clothing that you need.

Overall, the best option is to plan ahead and ensure that you are properly dressed for lab well in advance. This will help you avoid any last-minute emergencies and ensure that you are able to focus on your lab work without any distractions. Therefore, the correct option is F.

The Question was Incomplete, Find the full content below :

It's five minutes before your lab period begins and you realize that you are not properly dressed for lab. You could (choose all correct options):

A. Return to your residence to get the proper clothing, if time permits.

B. Go to the Student Stores to purchase the proper clothing.

C. Try to sneak into lab while your TA is not looking.

D. Ask a friend to bring proper clothing, if time permits.

E. All of the above

F. A, B and D

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Answer: 2, 4, 6

Explanation: A beta particle is a high energy electron, emitted from the radioactive disintegration of an atomic nucleus. It has a -1 charge.