Determine the wavelength of the third Balmer line (transition from n = 5 to n = 2 ).

The neutral grain spirit is essentially known as rectified spirits or ethyl alcohol.

neutral grain spirit can be defined as raw material that is very concentrated with alcohol used to produce strong alcoholic products.

neutral grain spirit as the name implies is neutral in nature that is it can be blended with any other alcoholic product.

In conclusion, The neutral grain spirit is essentially known as rectified spirits or ethyl alcohol.

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Answer:

B. the role of creativity in scientific discovery

Explanation:

Watson and Crick's ball-and-stick model of DNA demonstrates the importance of creativity in science. Creativity involves having a questioning mind that is always searching for answers and which employs logical reasoning to arrive at these answers. After Rosalind Franklin obtained an X-ray diffraction of DNA, Scientists Watson and Crick expanded on this knowledge by creatively organizing ball and sticks in a manner that represenseted the structure of the DNA.  

This simple creative act led to more discoveries about the DNA including the facts that their was a pairing wherein Adenine paired with Thymine and Cytosine paired with Guanine. They also found that the DNA structure could be unzipped and that copying was also possible. They used the simple things around them to arrive at this conclusion. This is an example of the importance of creativity in science.

Area of Wedge = (Central Angle / 360°) * (π * Radius^2)

The area of the wedge, we need to calculate the central angle corresponding to the given arc length. The formula to find the central angle is:

Central Angle = (Arc Length / Circumference) * 360°

The circumference of the metal disc can be calculated using the formula:

Circumference = 2 * π * Radius

Substituting the given values, we have:

Circumference = 2 * π * 8 inches

The central angle can be calculated as:

Central Angle = (3 inches / (2 * π * 8 inches)) * 360°

Simplifying this expression gives us the central angle in degrees. Once we have the central angle, we can find the area of the wedge using the formula:

Area of Wedge = (Central Angle / 360°) * (π * Radius^2)

Substituting the values, we can calculate the area of the wedge.

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The moles of carbon atoms are there in 0.500 mole of C₂H₆ is:

c. 1.00 mole

To determine the number of moles of carbon atoms, we need to use the mole ratio between C₂H₆ and carbon atoms. The mole ratio is based on the balanced chemical equation, which shows the relationship between the number of moles of different elements or compounds.

In this case, the mole ratio between C₂H₆ and carbon atoms is 1:2. This means that for every 1 mole of C₂H₆, there are 2 moles of carbon atoms.

Using this mole ratio, we can set up a conversion factor to calculate the moles of carbon atoms:

0.500 mole C₂H₆ * (2 moles C / 1 mole C₂H₆)

By multiplying the given quantity (0.500 mole C₂H₆) by the conversion factor, we cancel out the mole unit for C₂H₆ and end up with the moles of carbon atoms.

Calculating this expression gives us:

0.500 mole C₂H₆ * (2 moles C / 1 mole C₂H₆) = 1.00 mole C

Therefore, there are 1.00 mole of carbon atoms in 0.500 mole of C₂H₆.

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The δs for the sublimation of 1 mol of co2(s) in this phase transition is 87.9 j/(K.mol).

The heat necessary to sublimate (transform from solid to gas) one mole of a substance at a specific combination of temperature and pressure, typically standard temperature and pressure, is known as the enthalpy of sublimation or heat of sublimation in thermodynamics (STP). It is equivalent to the solid's cohesive energy. It is also equal to the typical enthalpy of production of the gaseous metal atoms for elemental metals. Typically, kJ/mol is used to express the heat of sublimation.

From the given data,

δh = 26.1 kj/mol of CO2(s)

δs = ?

for transition phase, Temperature (T) = 298.15 K

then,

δs = δh/T = 26100 j/mol /298.15 K = 87.9 j/(K.mol)

δs = 87.9 j/(K.mol)

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Answer:

A

Explanation:

Aromatic hydrocarbons are denser and have poorer self-ignition qualities, and also, they produce more soot in burning.

The number of moles of gas added to the container is 6.11 mol.

We know that for a fixed amount of gas, pressure and temperature are directly proportional to volume (Boyle's Law). This means if the pressure and temperature remain constant, then the ratio of the initial and final volume should be the same as the ratio of the initial and final number of moles of gas, given by Avogadro's Law.

Initial volume = 5.12 L, Initial moles of gas = 4.51 mol
Final volume = 12.1 L, Final moles of gas = x (unknown)
Using the Avogadro's Law formula:

Initial moles / Initial volume = Final moles / Final volume
4.51 mol / 5.12 L = x mol / 12.1 L

Solving for x:

x = (4.51 mol / 5.12 L) * 12.1 L
x = 10.62 mol

Therefore, the final number of moles of gas in the container is 10.62 mol. The number of moles of gas added to the container is the difference between the final and initial moles of gas:

Moles added = 10.62 mol - 4.51 mol
Moles added = 6.11 mol

However, we are asked to find the number of moles of gas added to the container from the initial volume to the final volume. Therefore, we only need to calculate the number of moles added beyond the initial 4.51 mol.

Moles added = Final moles - Initial moles
Moles added = 10.62 mol - 4.51 mol
Moles added = 6.11 mol.

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Answer: D. If the reaction occurs in the gas phase

Explanation:

Answer:

D is correct via A P e x

Explanation:

A polymer is formed by a chemical process called polymerization. During polymerization, small molecules, called monomers, combine to form a large chain-like molecule. When you change the monomer, you can create a new polymer.

The given monomer is shown as C₀NCIHIDI₀C. The polymerization process produces a small molecule as well. The formula for the small molecule produced is (HCl).

The modification of monomers to create one repeat unit of the polymer are given below:

Step 1: Draw the structure of the given monomer, which is C₀NCIHIDI₀C.

Step 2: Identify the repeating unit in the structure. In this case, the repeating unit is C₀NCI.

Step 3: Write the repeating unit in brackets and add the subscript 'n' to show the number of repeating units in the polymer. So, the polymer will look like this: (C₀NCI)n.

Step 4: To show the bond between the repeating units, add a bond sign, which is usually '—'. Therefore, the polymer is represented as: (C₀NCI)n—.

The small molecule produced in the reaction is hydrogen chloride (HCl). HCl is formed due to the elimination of a hydrogen ion from one monomer and a chloride ion from another monomer. The chemical equation of this reaction is given below:

C₀NCIHIDI₀C → (C₀NCI)n + HCl

The formula for the small molecule produced is (HCl).

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The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14.  pH is a unitless quantity. Therefore,  the pH of the solution is  2.7.

What is pH?

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

Number of moles =  .650M ×75.0 mL  = 3.5 × 10⁻³ moles

Molarity of the methylamine = 3.5 × 10⁻³ moles/75.0 mL = 0.012 M

               AH(aq) +H₂O ⇔H₃O⁺ (aq) + A⁻(aq)

I                 0.012                       0                 0

C               - x                             +x               +x

E               0.012 -x                     x                 x

Kb= Antilog (-3.5) =5.0 x 10⁻⁴

Kb = [H₃O⁺] [A⁻]/[AH]

3.2 × 10⁻⁴ = x²/0.012 -x

3.2 × 10⁻⁴ (0.012 -x ) =  x²

3.84 ×10⁻⁶ - 3.2 × 10⁻⁴x =   x²

Solving the resulting quadratic equation

x=0.0018 M

pH=-log(0.0018 M) = 2.7

Therefore,  the pH of the solution is 2.7.

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Answer:

Explanation:

Hope it helps:)

Answer:

\( \huge{ \boxed{ \boxed{0.13 \: moles}}}\)

Explanation:

The number of moles of the given mass of calcium chloride can be found by using the formula;

\( n = \dfrac{m}{M} \)

where

m is the mass in grams

M is the molar mass in g/mol

n is the number of moles

From the question

m = 14.3 g

Molar mass (M) of calcium chloride ( \( CaCl_2 \)) = 40 + (35 × 2) = 40 + 70 = 110 g/mol

\(n = \dfrac{14.3}{110} = 0.13 \\ \)

We have the final answer as

Answer:

"ite"

Explanation:

Se sabe que los elementos del grupo 16 de la tabla prioritaria muestran estados de oxidación o valencias de 2,4 y 6 respectivamente, dependiendo del compuesto formado.

Por ejemplo, el azufre forma los siguientes compuestos;

sulfato de sodio (el azufre tiene una valencia de 6)

Sulfito de sodio (el azufre tiene una valencia de 4)

Sulfuro de sodio (el azufre tiene una valencia de 2)

Por lo tanto, en compuestos en los que exhiben una valencia de 4, la terminación común es "ite"

Answer:

ite

Explanation:

Hope this helps

Tetrasulfur dinitride, with the chemical formula S₄N₂, is a compound composed of four sulfur atoms (S) and two nitrogen atoms (N).

It is known for its explosive nature when subjected to heat or shock. The compound undergoes a rapid decomposition reaction under these conditions, releasing large amounts of energy and generating highly reactive products. This decomposition is exothermic and can result in an explosion. The exact mechanism of the decomposition is complex, involving the breakage of the S-N bonds and the formation of various sulfur and nitrogen-containing species. Due to its explosive properties, tetrasulfur dinitride is handled with extreme caution and is used primarily in specialized applications.

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Answer:

in a chemical reaction, the total mass of the products compared to the total mass of the ... How many moles of Nitrogen will be needed to produce 0.84 moles of NH3? ... What volume of CO2 are produced if 2.3 x 10^24 molecules of benzene ...

Answer:

The Human Genome Map was completed on (April 14, 2003) and  gave us the ability, for the first time, to read nature's complete genetic blueprint for building a human being.

Answer:

154.61 g.

Explanation:

he balanced chemical equation for the reaction of KCIO3 to form KCl and O2 is:

2KCIO3 -> 2KCl + 3O2

From this equation, we can see that for every 1 mole of KCIO3, 2 moles of KCl and 3 moles of O2 are produced.

First, we need to calculate the number of moles of KCIO3:

n = mass / molar mass

= 125g / (138.2 g/mol)

= 0.902 moles

Now that we have the number of moles of KCIO3, we can calculate the masses of the products:

Mass of KCl = 0.902 moles * (74.55 g/mol) = 67.53 g

Mass of O2 = 0.902 moles * (32.00 g/mol) * 3 = 87.08 g

So the total mass of the products will be:

67.53 g + 87.08 g = 154.61 g.


ALLEN

Answer:

CO 2 is non polar molecule although it contains polar C-O bonds. This is because of the symmetrical linear structure of CO2 (O=C=O), the strength of polarity of each C-O bond being same and in opposite direction the polar bonds cancel the effect of each other, thus give rise to non polar molecule

Answer:

There are three major classifications of substances known as acids or bases. The Arrhenius definition states that an acid produces H+ in solution and a base produces OH-. This theory was developed by Svante Arrhenius in 1883. Later, two more sophisticated and general theories were proposed. These are the Brønsted-Lowry and the Lewis definitions of acids and bases. The Lewis theory is discussed elsewhere.

The Arrhenius Theory of Acids and Bases

In 1884, the Swedish chemist Svante Arrhenius proposed two specific classifications of compounds; acids and bases. When dissolved in an aqueous solution, certain ions were released into the solution. An Arrhenius acid is a compound that increases the concentration of H+ ions that are present when added to water. These H+ ions form the hydronium ion (H3O+) when they combine with water molecules. This process is represented in a chemical equation by adding H2O to the reactants side.

HCl(aq)→H+(aq)+Cl−(aq)(1)

In this reaction, hydrochloric acid ( HCl ) dissociates completely into hydrogen (H+) and chlorine (Cl-) ions when dissolved in water, thereby releasing H+ ions into solution. Formation of the hydronium ion equation:

HCl(aq)+H2O(l)→H3O+(aq)+Cl−(aq)(2)

The Arrhenius theory, which is the simplest and least general description of acids and bases, includes acids such as HClO4 and HBr and bases such as NaOH or Mg(OH)2 . For example the complete dissociation of HBr gas into water results generates free H3O+ ions.

HBr(g)+H2O(l)→H3O+(aq)+Br−(aq)(3)

This theory successfully describes how acids and bases react with each other to make water and salts. However, it does not explain why some substances that do not contain hydroxide ions, such as F− and NO−2 , can make basic solutions in water. The Brønsted-Lowry definition of acids and bases addresses this problem.

An Arrhenius base is a compound that increases the concentration of OH- ions that are present when added to water. The dissociation is represented by the following equation:

NaOH(aq)→Na+(aq)+OH−(aq)(4)

In this reaction, sodium hydroxide (NaOH) disassociates into sodium (Na+) and hydroxide (OH-) ions when dissolved in water, thereby releasing OH- ions into solution.

the answer is b

Explanation: its b

Answer:

D

Explanation:

once a hypothesis is proven true, it becomes a theory and cannot be disproved.

Im so glad i got help with this one because i got a hundred bc of someone.

According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

Answer:

All countries need to move their economies away from fossil fuels as soon as possible. Invest in renewable energy. Changing our main energy sources to clean and renewable energy is the best way to stop using fossil fuels. These include technologies like solar, wind, wave, tidal and geothermal power

Answer:

hydrogen is a non-metal, and has one valence electron.

Explanation:

Hope this helps!!

Hydrogen shows properties of both metals and nonmetals. However, hydrogen is placed with the alkali metals since it contains one valence electrons.

Hydrogen is the first element in the periodic table. It has only one electron and it is the valence electron of hydrogen. Therefore, hydrogen is placed in the first group of periodic table.

Hydrogen needs one more electrons to become stable. The 17th group elements halogens also have a valency of  one. Hence, hydrogen shows some chemical similarities with halogens also.

Mostly hydrogen forms covalent bonds like non-metals and in rare cases, hydrogen forms ionic bonds by donating its electron. Therefore, hydrogen is mostly considered as a non-metal.

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Answer:

c

Explanation:

The commercial technology commonly uses plasma is a television. The correct option is c.

Commercial technology is any technology that is employed in the business world, including electric power, radio, television, phones, and other similar devices. These items are employed commercially in a variety of fields. An electrical gadget called television is used to watch entertainment.

Plasma is a substance found in televisions; these gas-filled pockets receive electricity to transform into plasma screens. The UV rays that these plasmas then emit create a picture as they pass through the phosphorus cells.

Thus, the correct option is c. a television, regarding a commercial technology that commonly uses plasmas.

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Answer:The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.

Explanation:

Answer:

Ano po ba grade hirap namn po yan

Answer:

A) 60

Explanation:

Given data:

Distance traveled by car = 210 km

Time taken = 3.5 hour

Speed of car = ?

Solution:

Formula:

S = d/t

s = speed of car

d = distance

t = time

by putting values,

s = 210 km / 3.5 hour

s = 60 km/hour