Which material from the table is a liquid at 50°C and a gas at 300°C?

Answer:

33 minutes

Explanation:

60 km/h = 37.28 mi/h

20/37.28 = 0.5364 h

0.5364 * 60 min = 32.2 minutes

Answer:

Disturbance

Explanation:

I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.

Before starting a titration equation, we need to find the pH of this initial solution.

Titration is a method of chemical analysis where the quantity of a sample's constituents is determined by adding a precisely measured amount of a different substance to which the desired ingredient will react in a specific, known proportion. A burette, which is simply a long, graduated measuring tube with a stopcock and a delivery tube at its bottom end, is used to gradually administer a standard solution of titrating reagent, or titrant, to a specified concentration. When the equivalence point is achieved, the addition is terminated.

An exact comparable quantity of titrant has been applied to the sample at the equivalence point of a titration. The end point is the experimental point at which a signal indicating the end of the reaction appears. The indicator's colour changing or a change in an electrical characteristic that is being monitored throughout the titration can both serve as this indication. The titration error, which is the difference between the end point and the equivalence point, is minimised by selecting an appropriate end-point signal and a technique for detecting it.

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Answer:

sight, taste, touch, hearing and smell

Explanation:

Anything detected with the five senses is considered a sensory perception or sensory experience

Our five senses are sight (vision), hearing (audition), taste (gustation), touch (tactile perception), and smell (olfaction). These senses allow us to perceive and interpret information from the external environment.

When stated as "detected with the five senses," which means gather information about the world around us through these sensory experiences.

For example:

1. Sight (Vision): We perceive visual information through our eyes, allowing us to see colors, shapes, and movements.

2. Hearing (Audition): We perceive auditory information through our ears, allowing us to hear sounds and distinguish between different tones and pitches.

3. Taste (Gustation): We perceive taste sensations through our taste buds on the tongue, allowing us to distinguish between sweet, sour, salty, bitter, and umami flavors.

4. Touch (Tactile Perception): We perceive tactile sensations through our skin, allowing us to feel textures, pressure, temperature, and pain.

5. Smell (Olfaction): We perceive smells through our olfactory system, located in our nose, allowing us to detect and identify various scents and odors.

All the sensory experiences , whether through sight, hearing, taste, touch, or smell, contribute to our understanding of the world and our surroundings.

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Answer:

3000 ÷ 150

Explanation:

acceleration = N/kg

Answer:

2 grinding of wheat is just a physical change

plz brainlist

The specific surface area per mL is 251 m²/mL, and the specific surface area per gram is 251 m²/g.

To calculate the specific surface area per mL and per gram accurately, we need to consider the dimensions and units properly.

Given:

Granule size: 5 micrometers

Density: 2 g/mL

First, let's calculate the surface area of a single granule. The surface area of a sphere is given by the formula:

Surface area = 4πr²

where r is the radius of the sphere.

The radius of a granule is half of its diameter, so the radius would be 2.5 micrometers (0.0025 mm).

Surface area of a single granule = 4π(0.0025 mm)² = 4π(6.25 × 10^(-9) mm²) = 3.14 × 10^(-8) mm²

Next, let's calculate the number of granules in 1 mL and 1 gram of the sample.

1 mL of the sample has a volume of 1 mL, and since the density is 2 g/mL, the mass of 1 mL of the sample is 2 grams.

Number of granules in 1 mL = (1 mL / 5 micrometers)^3

= (1 mL / (5 × 10^(-3) mm))^3

= (1 × 10^6 mm³ / (5 × 10^(-3) mm))^3

= (2 × 10^5)^3 = 8 × 10^15 granules

Number of granules in 1 gram = (1 gram / 2 grams) × (1 mL / 5 micrometers)^3

= (1 × 10^3 mm³ / (5 × 10^(-3) mm))^3

= (2 × 10^5)^3

= 8 × 10^15 granules

Finally, we can calculate the specific surface area per mL and per gram:

Specific surface area per mL

= Surface area of a single granule × Number of granules in 1 mL

= 3.14 × 10^(-8) mm² × 8 × 10^15

= 2.51 × 10^8 mm²

Specific surface area per gram = Surface area of a single granule × Number of granules in 1 gram = 3.14 × 10^(-8) mm² × 8 × 10^15 = 2.51 × 10^8 mm²

To convert the specific surface area from mm² to m², we divide by 10^6:

Specific surface area per mL = 2.51 × 10^8 mm² / 10^6 = 251 m²/mL

Specific surface area per gram = 2.51 × 10^8 mm² / 10^6 = 251 m²/g

Therefore, the specific surface area per mL is 251 m²/mL, and the specific surface area per gram is 251 m²/g.

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A buffer solution is defined as a solution that resists a change in pH when a small amount of acid or base is added to it. the buffer capacity of the solution will prevent the pH from changing too much.

The buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will experience the following changes when a small amount of HClO4 is added to it: The HClO4 added to the buffer solution will react with the potassium nitrite, KNO2, to form the salt, KClO4.T

he HNO2 will be converted to nitric acid, HNO3, by the HClO4.The HNO3 formed in the previous step will react with the potassium nitrite, KNO2, to form nitric oxide, NO, and potassium nitrate, KNO3.The net effect of adding HClO4 to the buffer solution containing nitrous acid, HNO2, and potassium nitrite, KNO2, will be to shift the buffer solution to a more acidic pH range.

However, the buffer capacity of the solution will prevent the pH from changing too much.

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Answer:

Halogens are used in, water and sanitation, plastics, pharmaceutical, pulp and paper, textile, military and oil industries. Bromine, chlorine, fluorine and iodine are chemical intermediates( bleaching agents and disinfectants). Chlorine is used to purify water. Chlorine also is part of salt, sodium chloride, which is one of the most widely used chemical compounds. Fluorine is used in fluorides, which are added to water supplies to prevent tooth decay.

hopes this helps~

Answer:

What are some uses of halogen elements? Chlorine is used to purify water. Chlorine also is part of salt, sodium chloride, which is one of the most widely used chemical compounds. Fluorine is used in fluorides, which are added to water supplies to prevent tooth decay.

Explanation:

Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At), and tennessine (Ts). They were given the name halogen, from the Greek roots hal- (“salt”) and -gen (“to produce”), because they all produce sodium salts of similar properties, of which sodium chloride—table salt, or halite—is best known.

Because of their great reactivity, the free halogen elements are not found in nature. In combined form, fluorine is the most abundant of the halogens in Earth’s crust. The percentages of the halogens in the igneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine. Astatine and tennessine do not occur in nature, because they consist of only short-lived radioactive isotopes.

29.1 grams of potassium hydroxide was used, 29.1 grams of potassium sulfate will be formed upon the complete reaction

Potassium is a chemical element with symbol K and atomic number 19. It is a silvery-white metal that is soft enough to be cut with a knife. Potassium is an important mineral for human health and is found in a variety of foods including fruits, vegetables, dairy, and grains. Potassium helps maintain proper fluid balance, regulates nerve and muscle function, and supports the body’s metabolism. It is also important for the kidneys to function properly. Potassium is found as an ion in the body’s cells and is essential for the proper functioning of the heart, muscles, and other organs. Low levels of potassium can lead to fatigue, weakness, and cramping.

The equation for the reaction is:\(2KOH + KHSO_4 - > K_2SO_4 + 2H_2O\)

Since there is excess potassium hydrogen sulfate, we can assume that all of the potassium hydroxide will be consumed in the reaction. Therefore, the amount of potassium sulfate produced will be equal to the amount of potassium hydroxide used.

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The time taken for the light from the sun to reach the earth is 8.33 minutes.

Convert the distance from Earth to the Sun from kilometres to meters:

1.5 x \(10^{8}\) km = 1.5 x \(10^{8}\) x \(10^{3}\) m = 1.5 x \(10^{11}\) m

Time = Distance/ Speed = 1.5 x \(10^{11}\) m/ (3.0 x \(10^{8}\) m/s) = 0.5 x \(10^{3}\) s

To convert this time to minutes, divide by 60 (the number of seconds in a minute):

Time = 0.5 x \(10^{3}\) s / 60 s/min = 8.333 min

So, it takes about 8.333 minutes for light from the Sun to reach Earth.

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Answer:

• Note that dissolving rate is known as solubility

• Increase in particle size:

• Increase in temperature:

• Increase in concentration:

• Increase in agitation [ high water concentration ]:

\(.\)

To raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c, 222.92J heat is required.

Heat is a form of energy and it is associated with the motion of particles. The amount of heat required to change the temperature of a substance depends on its mass, the specific heat capacity of the substance and the change in temperature.

The mass of carbon tetrachloride is given as 10.35g. The specific heat capacity of carbon tetrachloride is given as 0.85651 J/g°C and the change in temperature is given as 24.3°C. Putting these values into the formula: q = m × C × ΔTq = 10.35 g × 0.85651 J/g°C × 24.3°Cq = 222.92 J. Therefore, 222.92 Joules of heat are required to raise the temperature of a 10.35g sample of carbon tetrachloride from 32.1°c to 56.4°c.

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15. F

16. E

17. H

18. B

19. G

20. i

21. A

22. C

23. D

You're welcome :)

In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

NO3 that is the answer to the question

The molecular structure of the covalent molecules, as well as the electron dot diagrams of hydrogen, ammonia, hydrochloric acid, water, and methane, are found in the attachment.

Covalent molecules are molecules that are formed by covalent bonds between two or more atoms of the same or different elements.

The inorganic elements hydrogen, fluorine, chlorine, water, and ammonia as well as all organic compounds are examples of molecules with covalent connections.

A covalent bond is formed when two atoms exchange one or more pairs of electrons. The two atomic nuclei are concurrently drawing these electrons to them. When the difference between the electronegativities of two atoms is too tiny for an electron transfer to take place to create ions, a covalent bond is formed.

In electron dot diagrams, the valence electrons of an atom are represented by dots that are positioned all around the symbol of the element.

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Out of the compounds given, A, B, D, and E are conjugated dienes because they contain a chain of alternating double bonds.

In a conjugated diene, the double bonds are separated by a single bond, which results in a system of overlapping p-orbitals that form a delocalized pi-electron system. This delocalization stabilizes the molecule and can lead to unique chemical reactivity.

Compound C, on the other hand, is not a conjugated diene because it has two adjacent double bonds, which means there is no single bond separating them. Therefore, the p-orbitals of the double bonds cannot overlap and form a delocalized pi-electron system.

In summary, A, B, D, and E are conjugated dienes, while C is not. It is important to note the differences between these compounds' structures and understand how they affect the properties and behavior of the compounds.

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water into vapor is the answer

Answer:

liquid water turning into vapor

Explanation:

because physical changes alter only the size

Answer:

I just love the killua pfp

I think b

Answer:

c

Explanation:

because it forces and help it

0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years, according to radioactive decay.

Given data,

\(t\frac{1}{2} of Co-60 = 5.20years\)

amount of sample = 2.000mg initially = 0.002grams

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

(\(N_{0} - 0.002\) )λ = \(\frac{0.693}{t\frac{1}{2} }\) = \(\frac{0.693}{5.20}\)  = 0.133

According to radioactive decay,

\(N_{t} = N_{0}e^{-λt}\)

\(lnN_{t} = lnN_{0}\) - λt

\(lnN_{t}\) = ln0.002 - (0.133×6.55)

       = -6.21 - 0.87 = -7.08 = 0.00084g = 0.84mg

Therefore, 0.84 milligrams of a 2. 000 mg sample remain after 6. 55 years.

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Answer:

1.Sulfur dioxide and nitrogen oxide

2.a)it forms carbonic acid

b)

3.the community can use renewable energy like solar and wind power cause they produce less pollution

If you were to cut a metal element over and over a given, to the point that is barely visible would still be considered as an element. Yes, it is merely being chopped; nothing about its atomic composition is changed.

As a result of these stray neutrons splitting new atoms, more energy and neutrons are released, setting off a chain reaction. Only lasers, magnetic fields, and chemical reactions are capable of "breaking" objects apart at the atomic level.

Precision, ease of use, and clarity define the metal element. It also stands for joy, righteousness, and integrity. You may include the metal element into your home's design using the following items to enhance these aspects in your life: Colors include white, grey, and metallic hues.

The tiniest component of ordinary matter, an atomic , makes up a chemical element. Neutral or ionised atoms make up every solid, liquid, gas, and plasma. Atoms typically have a diameter of 100 picometers or less.

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It is simpler to understand and predict how atoms will interact to form chemical bonds when you know how phosphorus (atomic number 15) is configured: 1s2 2s2 2p6 3s2 3p3.

The periodic table, also known as a table of elements, reveals that the atomic number of phosphorus, denoted by the symbol P, is 15. As a result, an atom has 15 protons. The ion's mass number is 15 + 16 = 31. The ion has a net charge of 3 due to its composition of 15 protons and 18 electrons, which is three more electrons than protons.

The phosphide ion, P3-, is the most stable monoatomic ion produced from phosphorus. Phosphorous already has 5 valence electrons, so adding 3 more will make it isoelectronic with the stable noble gas argon, resulting in the formation of the P3- ion.

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The segregation model for an inert tracer pulse test can be used to determine the conversion of A for a liquid-phase first-order reaction. The segregation model is a model that is based on the assumption that the tracer concentration in the reactor's fluid stream is proportional to the concentration of A,

and it can be expressed as a function of time.The segregation model's  is Ctr = Cao(1- e^(-kt)), where Ctr is the tracer concentration in the reactor's fluid stream, Cao is the initial concentration of the tracer, k is the rate constant of the first-order reaction, and t is time.The concentration of A at the reactor's exit can be calculated by dividing the tracer concentration at each time interval by the segregation model's as shown below.Explanation:Ctr = Cao(1- e^(-kt))Segregation model's= Ctr / Cao,

the concentration of A at reactor exit = Ctr / (k * V)We can compute the value of k * V by dividing the area under the curve by Cao. Using the trapezoidal rule, we can determine the area under the curve. Time (min)Tracer Conc. (M) 0 0.0 1 1.0 2 2.51 3 5.0 4 2.5 5 1.0 6 0.0Area under the curve = (1/2)(1.0 + 2.51)(1-0) + (1/2)(2.51 + 5.0)(3-1) + (1/2)(5.0 + 2.5)(4-3) + (1/2)(2.5 + 1.0)(5-4) = 15.265 M * min.The value of k * V = Area under the curve / Cao = 15.265 / 1 = 15.265 min^-1. The conversion of A can be calculated by substituting the above values into the segregation model's main answer.Ctr = Cao(1- e^(-kt))where t = 6, k = 15.265, and Cao = 1 mol/L.Ctr = 1(1- e^(-(15.265)(6))) = 0.993 mol/LThe concentration of A at the reactor's exit is Ctr / (k * V) = 0.993 / (15.265 * 1) = 0.065 or 6.5%.Therefore, the conversion of A for this isothermal reactor is 6.5%.

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