In what way was the reaction of the splint and CO2 different from the reaction of the H2 to the flaming splint

The number of atoms in 16.25 g of Al is calculated here. One mole or 26.98 g of Al contains 6.022 × 10²³ atoms. Thus, the atoms in 16.25 g or 0.60 mol of Al contains 3.62 × 10²³ atoms.

Any substance containing 6.022 × 10²³ atoms is called one mole of that substance. This number is called Avogadro number. Therefore, one mole of every substances contains Avogadro number of atoms. The mass of one mole of an atom is called its atomic mass.

Al is 13th element in periodic table. Its atomic mass is 26.98 g/mol. Thus, the  number of moles of 16.25 g of Al is calculated as follows:

no.of moles = given mass/atomic mass

                    = 16.25/26.98 =0.60 moles.

1 mole of Al contains 6.022 × 10²³ atoms. Thus, 0.60 moles contains 6.022 × 10²³ × 0.60 =  3.62 × 10²³ atoms.

Therefore, to calculate the number of atoms in a given number of moles of an element multiply the number of moles with Avogadro's number.

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Fluorine atom substitution is the term used to describe the fluorine atom when it replaces hydrogen in drugs.

Hydrogen is often replaced with a fluorine atom in drugs to improve their activity, stability, and pharmacokinetic properties. The substitution of a hydrogen atom with a fluorine atom is known as fluorine atom substitution. In the design and development of drugs, fluorine atom substitution is one of the most important and widely utilized methods. It has been utilized in the preparation of various drugs for several years.

The substitution of hydrogen with fluorine has been utilized to enhance drug properties like metabolic stability, activity, lipophilicity, and others. The reason why a fluorine atom is used to replace hydrogen in drug development is because of its small size, high electronegativity, and the unique chemical properties that it imparts to a drug molecule. It has been found to be an effective method of modifying drug properties in a variety of ways.

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Answer:

Explanation:

See attachment

Answer:

Flerovium

Explanation:

Answer:

Fl or flerovium. Atomic number is the number above the element on a periodic table.

answer and explanation

we know that :

1 kg = 1000g

we can use this to calculate how many grams are in 3.5kg as follows

1000 g/ 1 kg x 3.5kg/1 = 3500 g/1 = 3500g

Answer: Mg and Ca

Explanation:

In the modern periodic table, Mg and Ca are the last pair of elects for which Newlands' Law of Octaves would hold true.

Law of Octaves is the generalization that was made by Newlands. It states that when chemical elements are arranged based on their increasing atomic weight, then the ones that have the same chemical and physical properties will occur after an interval of seven elements.

In such a case, every eighth element will have identical properties when the elements in the periodic table are arranged based on their atomic masses.

Based on the above information, Magnesium (Mg) has an atomic number of 12 while Calcium (Ca) has an atomic number of 20. Therefore, the elements follow the law of Octaves as they have a difference of 8 in their atomic numbers.

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Explanation:

K. from Latin name kalium

Option A,  Ninhydrin is a chemical that is used to detect the presence of amino acids in a sample. It reacts with the amino acids in a sample, such as skin, to form a complex that is blue in color.

Ninhydrin is a chemical that is used to detect the presence of amino acids in a sample. It reacts with the amino acids in a sample, such as skin, to form a complex that is blue in color. This is because when Ninhydrin reacts with an amino acid it forms a complex with the nitrogen in the amino group, and this complex is blue in color. It is also commonly used in forensic science to detect fingerprints, as fingerprints contain amino acids from the oils and sweat on the skin. The blue coloration of the skin is an indication of the presence of amino acids, which are found in many biological molecules such as proteins and enzymes.

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1. The longer distance for each choice is:

2. The complete statements are as follows;

3. The basic unit of length in the metric system is the meter and is represented by a lowercase m.

4. The meter is defined as the distance traveled by light in absolute vacuum in 1⁄299,792,458 of a second.

5. The values that complete each statement is given below:

6. The larger value for each option is:

7. The number of millimeters in 1 centimeter is 10 mm

8. Using the ruler and line, the answers are:

The unit for measuring distance in the metric system is the meter. Smaller and larger values of the meter are also used such as millimeters, centimeters, kilometers, etc.

Other units for measuring distance include yards, miles, and inches.

The various units for measuring distance can also be interconverted using their conversion factors.

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Since rate of reaction depends on the surface area of the reactants,  lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium carbonate.

The rate of reaction is affected by many factors among which is the surface area of the reactants. We must note that the greater the surface area the quicker the rate of reaction.

As such, the surface area of the powdered sodium carbonate is greater than that of the lumps of sodium carbonate. Therefore, lumps of sodium carbonate react more slowly with dilute nitric acid than powdered sodium carbonate. This is because the particles of the powdered sodium carbonate collide more easily with the acid molecules than the lumps of sodium carbonate.

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Answer: Hope it can help you :)

Explanation:

Answer:

Warmer, colder

Explanation:

\(\\ \sf\longrightarrow Molarity=\dfrac{Moles\:of\:solute}{Volume\:of\: solution\:in\:L}\)

\(\\ \sf\longrightarrow Molarity=\dfrac{0.65}{0.05}\)

\(\\ \sf\longrightarrow Molarity=0.13M\)

Answer:

Venus and Mars?

Explanation:

Visible light and radio waves are both forms of electromagnetic radiation, which has a dual nature and can exhibit properties of both particles (photons) and waves.

The wave nature of electromagnetic radiation is characterized by its wavelength and frequency, which are related by the speed of light (c = λν). Visible light having a shorter wavelength and higher frequency than radio waves, which have longer wavelengths as well as lower frequencies.

The particle nature of electromagnetic radiation is characterized by photons, which are discrete packets of energy that behave like particles. The energy of a photon is directly proportional to its frequency (E = hν), where h is Planck's constant. When electromagnetic radiation interacts with matter, it can transfer its energy to electrons in the material, causing them to be excited to higher energy levels or even ionized (knocked out of the material).

In summary, electromagnetic radiation, including visible light and radio waves, has both wave-like and particle-like properties, depending on the way it is observed and the context in which it is being studied.

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--The given question is incomplete, the complete question is

"Visible light and radio waves are both example of _____ radiation, which has a dual nature, possessing the properties of both ______ and waves."--

Answer:

10

Explanation:

Answer: 10 neutrons

This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.

Explanation:

If 2 equivalents of HBr are used in the reaction, the major product will be 2,3-dibromobutane.

If 2 equivalents of HBr are used in the reaction, the major product will be 2,3-dibromobutane. This is because the second equivalent of HBr will add to the carbocation that is formed in the first step of the reaction. The carbocation is more stable if it is tertiary, which is why the second equivalent of HBr will add to the carbon atom that is bonded to two other alkyl groups.

The reaction can be shown as follows:

CH3CH2CH(CH3)CH=CH2 + 2HBr → CH3CH2CH(CH3)CHBrCH2Br

The first step of the reaction is the addition of HBr to the double bond. This forms a carbocation, which is a positively charged carbon atom. The second step of the reaction is the addition of the second equivalent of HBr to the carbocation. This forms 2,3-dibromobutane.

The other possible product of the reaction is 1,2-dibromobutane. However, this product is less stable than 2,3-dibromobutane because the carbocation in 1,2-dibromobutane is secondary. Secondary carbocations are less stable than tertiary carbocations because they have a smaller positive charge and are less stabilized by alkyl groups.

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Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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January 19

Explanation:

every first 7 days of a month the moon roughly starts its full moon phase

The mass percentage of sugar in the sweet tea is 10%

From the question,

We are to determine the mass percentage of sugar in the sweet tea

\(Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{Mass\ of\ sugar\ in\ the\ solution}{Mass\ of\ the\ solution} \times 100\%\)

Mass of sugar in the solution = 20 g

Mass of the solution = 20g + 180g = 200g

\(Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{20}{200} \times 100\%\)

\(Mass\ percentage\ of\ sugar\ in\ the\ sweet\ tea = \frac{20}{2} \%\)

∴ Mass percentage of sugar in the sweet tea = 10%

Hence, the mass percentage of sugar in the sweet tea is 10%

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The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride. This polymer will form between layers of the solutions. To remove the nylon, one can choose to dissolve it in the 5% hexamethylenediamine or in the 5% adipoyl chloride.

Nylon, a synthetic polymer, is produced from the combination of adipoyl chloride and hexamethylenediamine. This process is called the synthesis of nylon. Nylon is a highly flexible material that is resistant to wear and tear, as well as chemical and heat degradation. The synthesis of nylon requires solutions of 5% hexamethylenediamine and 5% adipoyl chloride, respectively, for the two reactants to be mixed together.

The reaction between these two chemicals is exothermic, which means that it releases heat. The heat generated in the reaction drives the reaction forward, resulting in the formation of nylon. The chemical formula for nylon is (-CO-NH-)n, where n is a large number that reflects the degree of polymerization. To remove the nylon, it is soaked in an acid solution. The acid dissolves the nylon, separating it into its constituent components, which can then be purified and reused.

The most commonly used acid for this process is hydrochloric acid. The process of removing nylon from its solvent is called the "acid-catalyzed hydrolysis of nylon." Nylon is used in a variety of applications, including textiles, packaging materials, and electrical components, among others. Its properties make it ideal for use in applications that require durability, strength, and flexibility. Nylon's physical properties, including its resistance to heat and chemical degradation, make it ideal for use in applications such as electrical insulation, packaging materials, and textiles.

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Answer:

13

Explanation:

Let's consider the unbalanced equation for the combustion of propane.

C₃H₈ + O₂ ⇒ CO₂ + H₂O

We will begin balancing H atoms by multiplying H₂O by 4.

C₃H₈ + O₂ ⇒ CO₂ + 4 H₂O

Now, we balance C atoms by multiplying CO₂ by 3.

C₃H₈ + O₂ ⇒ 3 CO₂ + 4 H₂O

Finally, we get the balanced equation multiplying O₂ by 5.

C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O

The sum of the coefficients is 1 + 5 + 3 + 4 = 13.

Answer:

Loam is soil composed mostly of sand, silt, and a smaller amount of clay. By weight, its mineral composition is about 40–40–20% concentration of sand–silt–clay, respectively.

Explanation:

Density is inversely proportional to volume the smaller the volume occupied by a given mass, the higher the Density of the star is 1,587,553.58 g/cm³.

Density is defined as the  quantity that allows us to measure the amount of mass in a certain volume of a substance. Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies.

density= mass÷ volume

Density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

Replacing in the definition of density:

Density= 2×10³⁹ g÷ 1.2598×10³³ cm³

             =1,587,553.58 g/cm³

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Answer:

A. Because you have to simplify

Answer:

decomposition

Explanation:

i dont cap

Explanation:

i found this hope it helps