nasa measured the frequency of a cosmic ray emission to be 2.3 x 10^24 Hz. what is the wavelength in nm of this cosmic ray

The highest energy transition in the hydrogen atom among the following is from n=6 to n=3. Hence option d is correct.

Bohr model of atom proposed the modern atomic model based on the interpretations from quantum mechanics. According to this model, electrons are revolving around the atom through circular paths of fixed energy.

The energy of the se levels and the momentum of electrons can be determined using Bohr's equation. Electrons can transit between these energy levels. The Rydberg formula for the transition is written as follows:

[tex]\frac{1}{\lambda} = R [\frac{1}{n_{1}^2} -\frac{1}{n_{2}^2} ][/tex]

Here, R is the Rydberg constant and n1 and n2 be the first and second energy levels.

The transition n=6 to n=3 gives the higher value for this equation. Hence, this transition results highest energy absorption.

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The organic nomenclature of the condensed structural compound is 1. Octane.

1. Octane

2. But - 2- ene

3. ethylene

4. Penatne

5. But - 2 - yne

6. hept 1 - yne

7. Hexx-2 - ene

8. But -1 - yne

In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of naming natural chemical compounds as recommended by using the global Union of natural and applied Chemistry. it is posted inside the Nomenclature of Organic Chemistry.

The name of the organic compound is written out with the substituents in alphabetical order observed via the bottom call (derived from the wide variety of carbons in the discern chain). Commas are used among numbers and dashes are used between letters and numbers. There are no spaces inside the call.

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The empirical formulas of the two oxides are CO and [tex]CO_2[/tex] respectively. Thus, the figures illustrate the law of multiple proportions.

The law of multiple proportions states that when two elements form more than one compound, the ratios of the masses of the second element which combine with a fixed mass of the first element will always be ratios of small whole numbers.

Now, let's see if the figures quoted in the problem obey this law:

The first oxide:

C = 42.9

O = 100-42.9

   = 57.1

The equivalent mole of each atom would be:

C = 42.9/12

  = 3.56

O = 57.1/16

   = 3.56

Thus, the empirical formula of the first oxide is CO.

The second oxide:

C = 27.3

O = 100 - 27.3

   = 72.7

The equivalent mole of each atom will be:

C = 27.3/12

  = 2.27

O = 72.7/16

   = 4.54

Dividing the moles by the smallest mole

C = 2.27/2.27

  = 1

O = 4.54/2.27

   = 2

Thus, the empirical formula of the second oxide is [tex]CO_2[/tex].

In other words, the figures quoted obeys the law of multiple proportions.

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Explanation:

C

as the girl applies a resultant force on the volleyball causing it to accelerate, there's an unbalanced force acting on the ball.

Sulfur Dioxide, (SO2), is an inorganic compound, a heavy colorless poisonous gas.

Sulfur dioxide has a pungent, irritating odor, familiar as the smell of a just-struck match. It is produced in huge quantities in an intermediate setup. Occurring in nature in volcanic gases and in solution in the waters of some warm springs, sulfur dioxide usually is prepared industrially by the burning in air or oxygen of sulfur or such compounds of sulfur as iron pyrite or copper pyrite.

In the atmosphere, it can combine with water vapor to form sulfuric acid, a major component of acid rain. In the laboratory the gas may be prepared by reducing sulfuric acid (H2SO4) to sulfurous acid (H2SO3), which decomposes into water and sulfur dioxide, or by treating sulfites (salts of sulfurous acid) with strong acids, such as hydrochloric acid, again forming sulfurous acid.

Sulfur dioxide can be liquefied under moderate pressures at room temperatures; the liquid freezes at −73° C (−99.4° F) and boils at −10° C (14° F) under atmospheric pressure. Although its chief uses are in the preparation of sulfuric acid, sulfur trioxide, and sulfites, sulfur dioxide also is used as a disinfectant, a refrigerant, a bleach, and a food preservative, especially in dried fruits.

Molecular Formula: SO2

Molecular Weight: 64.07

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What do you mean by molarity?

Molarity-Molarity is a term that is used to show concentration of the solution . It is different from molality as it is expressed in mol per L , whereas molality is expressed in mol per kg.

Given:

The mole of Mgs is calculated as follows :

    Mole= Mass / Molar Mass

              = 25.7g/56.38 g/mol

              = 0.455 mol.

The molarity of Mgs solution is calculated as follows :-

            Molarity =Mole/Volume ( L )

                            =0.455mol/919ml* 1000ml/1L

                            =0.495M

Thus, the molarity of the solution is 0.495 M.

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Explanation:

I can't see the questions!!

Answer:

Explanation:

Manforce is a type of prescription in medical purposes used to treat erectile dysfunction for men. It usually comes in 100 mg tablets with price varying from 250- 350. It increases the blood flow within the person to maintain a erection in men.

Hope it helps!

A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present.  the molar mass of this unknown gas is

given that :

the mass of unknown gas = 4.5 g

number of moles of unknown gas = 0.14 mol

the number of moles is given as :

number of moles = mass / molar mass

molar mass of unknown gas =  mass / moles

                                               = 4.5 / 0.14

                                               = 32.14 g/mol

Thus, A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present.  the molar mass of this unknown gas is

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Answer:for making the text look colored and bold

Explanation:It can reacting differently with different mass solution, it also depends on what concentration you're measuring, and what reaction

The percent yield of the water is 33.3%.

We know that the reaction that takes place between hydrogen and oxygen to give water is; [tex]2H_{2} (g) + O_{2} (g) ----- > 2H_{2}O(g)[/tex]. We now need to find the number of moles of hydrogen = 4 g/2 g/mol = 2 moles

Now;

If 2 moles of hydrogen reacts with 1 moles of oxygen

We can see that oxygen is the limiting reactant in this case.

1 mole of oxygen produces 2 moles of water

1.5 moles of oxygen produces 1.5 * 2/1

= 3 moles of water

Then the theoretical yield of water = 3 moles * 18 g/mol = 54 g

Percent yield = Actual yield / theoretical yield * 100/1

= 18/54 * 100/1

= 33.3%

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In an investigation of the decomposition of water, a student compared the amount of oxygen in one test tube to the amount of hydrogen in the other test tube is There is one - half as much as hydrogen.

In decomposition of water , water can be broken into the hydrogen gas and the oxygen gas. The water decomposition reaction is given as :

2H₂O   ------>     2H₂     +     O₂

The ratio of  hydrogen and oxygen in the decomposition reaction of water is 2 : 1.

Thus, In an investigation of the decomposition of water, a student compared the amount of oxygen in one test tube to the amount of hydrogen in the other test tube is There is one - half as much as hydrogen.

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The volume of a 2.50M NaOH solution required to make 725 mL of a 0.150M NaOH solution is 43.5mL.

The volume of a solution can be calculated using the following expression:

CaVa = CbVb

Where;

Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.

According to this question, 2.50M NaOH solution are required to make 725 mL of a 0.150M NaOH solution. The volume required can be calculated as follows:

2.5 × Va = 725 × 0.150

2.5Va = 108.75

Va = 43.5mL

Therefore, 43.5mL is the volume of the solution.

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0.33 mol is the amount of the unknown gas present.

The ideal gas law states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

P × V = n × R × T

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK ).

Given the data in the question;

Plug the given values into the ideal gas law formula and solve for n ( amount of gas in moles ).

P × V = n × R × T

n = ( P × V ) / ( R × T )

n = ( 1.00atm × 8.00L ) / ( 0.08206Latm/molK × 298.15K )

n = 8.00Latm / 24.466189Latm/mol

n = 0.33 mol.

Therefore, the amount of gas is 0.33 mol.

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The most water in the United States is used power plants (thermoelectric power)

What are thermoelectric power plants ?

Water flowing through the boiler's network of pipes is heated, turning it into steam. A shaft connecting a turbine to a generator rotates the blades of a turbine powered by high-pressure steam. As the generator turns, electricity is generated. The thermoelectric power of a given metal is that of a couple made of that metal with lead, with the thermoelectric power of lead being arbitrarily regarded as zero. Rate of change of the thermoelectromotive force of a thermocouple with temperature.

Industrial water withdrawals make up just 5% of all water withdrawals in the US, but thermoelectric power draws make up 49% of all withdrawals. About 12% of the public water supply is also used by industrial and manufacturing companies.

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HCN is classified as a weak acid because it partially ionizes in water to produce hydrogen ions as the only positive ion.

There are several definitions for acids.

HCN ionizes in water according to the following equation:

[tex]HCN < --- > H^+ + CN^-[/tex]

Because the HCN is only partially ionized and not a complete ionization, it is said to be a weak acid because hydrogen ion is still formed as the only positive ion.

Strong acids produce hydrogen ions as their only positive ions but are completely ionized in water, unlike weak acids.

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A common thing in everyday life that uses the magnetic field or an electric field is the transformer.

The term magnetic field is the region that is around a magnet where there is a the influence of a magnetic. Also, the region around a charge where the influence of the charge can be felt is called the electric field.

Most of the devices that we have at home do have a transformer such as a radio set and a television set. The transformer that is in this appliance causes the regulation of voltage in the appliance.

The transformer works on the principle of the magnetic field and the electric field.

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The pressure of a sample of gas placed in a 25.0L container at STP is 0.98atm.

The pressure of an ideal gas can be calculated by using the following formula:

PV = nRT

Where;

According to this question, a sample of gas is placed in a 25.0 L sealed container at STP. The container is heated to 25°C. The pressure in the container is as follows:

P × 25 = 1 × 0.0821 × 298

25P = 24.47

P = 0.98atm

Therefore, 0.98atm is the pressure of the gas

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The chemical substances that are made up of two or more elements are known as compounds.

Compounds are the chemical substances that are made up of two or more elements which bonded to each other with fixed ratio. When elements combine with each other some of there individual properties are lost and some new properties are observed in the newly formed compounds.

Compounds can be differentiated into two types:

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According to the given statement Na of the atoms listed below has the largest radius.

An atom is made up of a core nucleus and one or even more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make it up the nucleus may be present. The fundamental building components of matter are atoms.

Atoms are made up of a nucleus in the center that is surrounded by protons, neutrons, and electron. Uranium is divided into smaller atoms during the fission process, creating new atoms. The creation or atoms in enormous numbers can be seen in the Big Bang and Supernova phenomena.

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Answer:

the protons go in the direction of C, the electrons go in the direction of A and neutrons go the direction of B.

Explanation:

this is because electrons get attracted to positively charged objects and protons get attracted to negatively charged objects and neutrons have no attraction towards any charge.

The equation of the reaction can be obtained as the net ionic equation of the reaction is; [tex]Fe^{2+} (aq) + CO_{3} ^{2-} (aq) ----- > Fe CO_{3} (s)[/tex]

The term net ionic equation has to do with the fact that we have considered the is that did not participate in the reaction. These ions that did not change in the course of the reaction are called the spectator ions in the reaction.

As we look at the reaction, we can see that ions that did not change in the reaction are the chlorate ion and the sodium ion. Thus the net ionic equation can be written as; [tex]Fe^{2+} (aq) + CO_{3} ^{2-} (aq) ----- > Fe CO_{3} (s)[/tex].

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When chromium changes from an oxidation state of +3 to that of +6, the Cr3+ must: lose 3 electrons.

So option C is correct.

The oxidation state or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic which describes the degree of oxidation of an atom in a chemical compound. In any concept, the oxidation state may be positive, negative or zero.

When chromium changes from an oxidation state of +3 to + 6 it loses 3 electrons during the process. For example oxidation state of elemental atoms such as sodium, magnesium, iron is zero.

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In the Lac operon, multiple proteins form from the same mRNA due to RNA splicing.

An operon is a cluster of genes that are transcribed from the same promoter to give a  single messenger RNA (mRNA) molecule that contains multiple coding sequences that are used to make multiple proteins.

Such an mRNA molecule is called a polycistronic mRNA.

An example of an operon is the Lac operon which encodes the genes used to produce the various enzymes required for the metabolism of lactose.

Three of the enzymes in the lac operon are grouped together and are known as lacZ, lacY, and lacA.

Alternative splicing of the mRNA produces the different proteins in operons.

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Option D, A small, positive nucleus is mostly empty.

Rutherford's atomic version is the version which defined the atom as a tiny, dense, undoubtedly charged middle referred to as a nucleus, wherein almost all of the mass is focused, round which the light, bad constituents, referred to as electrons, flow into at a few distance, just like planets revolving across the Sun.

What is the Rutherford gold-foil test, A piece of gold foil became hit with alpha debris, that have a fantastic charge. Most alpha debris went proper through. This confirmed that the gold atoms had been normally empty space.

The 3 fundamental observations of the test had been: Most of the distance within the atom is empty. All the fantastic costs are focused in a completely small vicinity in the atom, referred to as the nucleus. The nucleus's length may be very small as compared to the scale of the atom.

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The ground state ion that has unpaired electrons is Sc²⁺ ion; option C is correct.

The ground state ion is the state in which all its electrons are in the lowest energy orbitals possible. You can get positive ions by removing electrons until you reach a noble gas configuration.

Ground state ion configurations are the foundation for understanding molecular bonding, properties, and structures. From the electrons in an atom to the differing orbitals and hybridization, the ground state ion configuration throws light on many different atomic properties.

For example, the electronic configuration of Sc²⁺ is 1s²2s²2p⁶3s²3p⁶ 3d¹ 4s.

In conclusion, understanding electronic configuration leads to an understanding of the periodic table.

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The pH of the 3.9M of pottasium fluoride is 0.591.

pH of a solution can be described as the figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline.

The pH of a solution can be calculated by using the following expression:

pH = -log {H}

Where;

According to this question, a 3.9 M potassium fluoride is given. The pH can be calculated as follows:

pH = - log {3.9}

pH = -0.591

Therefore, the pH of the solution is 0.591

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Answer:

Number of protons in the nucleus of an atom