Explain how humans hear. Be sure to include the following terms in your response: outer ear, cochlea, eardrum, auditory nerve.

Answer:

State : Gaseous state  Colour : Pale yellow  Odour : Irritating

Explanation:

At 25 degree celsius which is approximately known as the room temperature, Fluorine being the highest electronegative element has weak van der waal forces due to which the electrons are apart from each other. At a high enough temperature(room temp. in this case) that is higher than their boiling point, the fluorine atoms become gaseous particles. Hope you understood my explanation....Happy Learning:)

Answer:

Heterotrophs

Explanation:

Heterotrophs are known as consumers because they consume producers or other consumers. Dogs, birds, fish, and humans are examples of heterotrophs. Heterotrophs occupy the second and third levels of the food chain, the chains of organisms that provide energy and nutrients to other organisms.

One mole of CS₂ and two moles of H₂S are formed as products and 3 moles of CH₄ are leftover.

A limiting reagent is a reactant that is fully exhausted from the reaction mixture at the completion of a  reaction. The limiting reactant will decide the maximum amount of product.

Given, a balanced chemical equation of the reaction between methane and sulphur is:

[tex]CH_4 + 4S\longrightarrow CS_2 +2H_2S[/tex]

Given, the number of moles of the sulphur = 4

The number of moles of methane = 4

From the chemical reaction, one mole of methane reacts with four moles of sulphur. Therefore, four moles of sulphur fully react with one mole of methane and three moles of methane leftover.

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The reactants' concentration needs to be raised.

What factors influence rate of reaction?

The rate of the reaction controls how quickly the chemical reaction moves forward. The reaction's rate is influenced by a number of variables. These elements are:

(i) The concentration of the reactant: As the reactant concentration rises, the reaction rate does as well.

(ii) The reactant's nature. The condition, reactivity, or solution type of the reactants all have an impact on the reaction's pace.

(iii)The pressure of the gases: As the pressure of the gases involved in a reaction rises, so does its rate.

(iv) The surface area of the solids—As exposed surface area increases, so does the rate of reaction.

Therefore, if we to speed up the process, she should raise the reactant concentration since the more reactant molecules there are, the more molecules will actually collide, which will enhance the rate of the reaction.

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Answer:

1s2 2s2 2p4

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. One mole of iron (ii) sulphate were reacted during the experiment.

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

The balanced equation is

FeSO[tex]_4[/tex](aq) + 2 NaOH (aq) [tex]\rightarrow[/tex] Fe (OH)[tex]_2[/tex] + Na [tex]_2[/tex] SO [tex]_4[/tex]

Stoichiometry, thet is written in the front of molecule or compound represents the number of moles of that compound. One mole of iron (ii) sulphate were reacted during the experiment.

Therefore, One mole of iron (ii) sulphate were reacted during the experiment.

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If if a reaction that should theoretically yield 20 g of a product has a 45% yield, The actual yield of product is 9g.

Using this formula to find  the actual yield of product

Actual yield of product = Actual yield × Theoretically yield

Where:

Actual yield  = 45% or 0.45

Theoretically yield = 20g

Let plug in  the formula

Actual yield  = 0.45 × 20g

Actual yield= 9g

Therefore the actual yield is 9g.

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Taking into account definition of percent yield, the actual yield of the product is 9 g.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

percent yield= (actual yield÷ theoretical yield)× 100%

where:

In this case, you know:

Replacing in the definition of percent yield:

45%= (actual yield÷ 20 g)× 100%

45%÷100%= actual yield÷ 20 g

0.45= actual yield÷ 20 g

0.45×20 g= actual yield

9 g= actual yield

Finally, the actual yield is 9 g.

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Answer: The answer would be C i think

Explanation:

X-rays and gamma rays have frequencies higher than microwaves but lower than UV radiation.

X-rays and gamma rays are both types of electromagnetic radiation. They are similar in that they are both invisible, travel at the speed of light, and can penetrate human tissue. They differ in their wavelength and energy. X-rays have a shorter wavelength and higher energy than gamma rays

Gamma rays are a type of electromagnetic radiation. They are the most energetic form of electromagnetic radiation. Gamma rays are produced by the most energetic events in the universe, such as supernova explosions and the merging of neutron stars.

X-rays are used in medicine and dentistry because they can penetrate the human body, which Gamma rays cannot.

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Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature.

Mathematically the relation between Pressure, volume and temperature can be given as

PV=nRT

where,

P = pressure of chlorine gas =1 atm

V= volume of chlorine gas =18.5L

n =number of moles of chlorine gas

T =temperature of chlorine gas =298K

R = Gas constant = 0.0821 L.atm/K.mol

1 atm×18.5L= 0.0821×n×298K

1 atm×18.5L=n×24.4

n=0.75mol

mass of chlorine=0.75mol×35.453 g/mol

                          =26.55g

Therefore 26.55g of iron is needed to completely consume 18.5L chlorine gas at 25 degree Celsius and 1 atm pressure.

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The number of atoms of Oxygen in 7.23 moles of Fe(NO₃)₃ is 3.92 x 10²⁵.

Determine to total number of individual molecules of Fe(NO₃)₃ in 7.23 moles.

Use Avogadro's number for this: 1 mole = 6.02 x 10²³ molecules.

Thus, 7.23 moles of Fe(NO₃)₃ contains molecules,

7.23 x 6.02 x 10²³ = 4.35 x 10²⁴ molecules of Fe(NO₃)₃.

Determine how many oxygen atoms in one molecule of Fe(NO₃)₃. There are 3 Oxygen atoms in the nitrate NO₃, and 3 nitrate groups in Fe(NO₃)₃. Thus, number of oxygen atoms in Fe(NO₃)₃ is,

3 x 3 = 9 Oxygen atoms in 1 molecule of Fe(NO₃)₃.

Finally, multiply the number of O atoms in 1 molecule of Fe(NO₃)₃ by the total number of Fe(NO₃)₃ molecules.

9 x 4.35 x 10²⁴ = 3.92 x 10²⁵ total Oxygen atoms.

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The combined mass of the dog and the basket is equal to 5.71 Kg.

Work can be described as the energy used when applying a force to move an object through a definite displacement.

The work done by a force to move an object through a displacement can be represented as:

W = F.dcosθ

Where θ is angle between displacement and force.

Given, the height the basket lifted up, d = 1.4 m

The angle between force and displacement, θ = 0°

Thus, the work done when lifting the basket is:

W = F d cosθ

W = mg.d cosθ

W = mg.d cos0°

m = W/gd

m = 221/(9.8).(3.95)

m = 5.71 Kg

Therefore, the mass of the basket and dog is equal to 5.71 Kg.

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The box for the following fusion equation 2 H + 2 H —> (2H₂) + energy

An critical fusion reaction for practical electricity generation is that between deuterium and tritium (the D-T fusion reaction). It produces helium (He) and a neutron (n) and is written D + T → He + n. To the left of the arrow (earlier than the response) there are  protons and 3 neutrons. The same is genuine on the proper.

Fusion guarantees a without a doubt endless shape of power that, in contrast to fossil fuels, emits 0 greenhouse gases and, not like the nuclear fission electricity used today, produces no lengthy-lifestyles radioactive waste.three.

Calculation:-

2 H + 2 H —> (2H₂) + energy

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The order of boiling point from the highest to the lowest from the given compounds above are as follows:

CH3CH2CH2CH2CH2OH - CH3CH2CH2CH2CH2Br - CH3CH2CH2CH2CH3 - CH3CH2CH3.

The correct order is option b, d, c and a.

The boiling point of substances can simply be defined as that temperature at which liquids boils and then change to vapor or steam.

However, from the above given task, the organic compound, CH3CH2CH2CH2CH2OH has the same boiling simply because of its power to participate in hydrogen bond formation. This compound CH3CH2CH2CH2CH2OH is known as 1-pentanol.

So therefore, we can confirm that the compound from above the correct order of boiling point from the highest to the lowest is 1-pentanol, 1-bromopentane, pentane and propane respectively.

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Answer:

the number of protons in the nucleus of an atom. the number of protons define the identity of an element

The wavelength that is associated with the transition is  2145 nm.

We know that the wavelength can be obtained from the use of the Rydberg equation and we know that the Bohr's mode lets us know that an electron can move from from a higher to a lower energy level.

Let us write;

1/λ = RH(1/[tex]n_{2} ^2[/tex] - 1/[tex]n_{1} ^2[/tex])

λ = wavelength

RH = Rydberg constant

[tex]n_{1}[/tex] = initial level

[tex]n_{2}[/tex] = final level

Then;

1/λ = 1.097 * 10^7 (1/4^2 - 1/7^2)

1/λ = 1.097 * 10^7 ( 0.0625 - 0.020)

λ =  2145 nm

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Answer:

A) Warmer

Explanation:

it says above 0

For any component: Proton count equals atomic number

Number of protons plus number of electrons equals the atomic number.

The number of neutrons is equal to the atomic number-mass number.

The quantity of protons in an element's atom is known as the atomic number. The atomic number of krypton in our illustration is 36. This indicates that the nucleus of a ruthenium atom contains 36 protons.

Every atom of ruthenium has 44 protons, which is intriguing. A Ruthenium atom cannot exist if it does not have 44 protons. A distinct element is produced by changing the number of protons in an atom's nucleus. An atom of rhodium is produced, for instance, by taking one proton away from a krypton atom.

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The ratio of Fe²+: Fe³+ in Fe3O4 is 1:2

What is ore?

An ore is a naturally occurring deposit of geologic material (rock) that contains a sufficient quantity of one or more valuable elements or compounds to be economically mined. Metals such as copper, platinum, iron, lead, gold, silver, aluminium, nickel, and others are among these valuable elements. Nonmetals such as silicon and diamond may be found in ore. These valuable chemicals can be extracted and used in a variety of ways, from jewellery creation to electronic gadget manufacture. Ores vary greatly based on the parent rock's chemical composition as well as the natural mechanism by which they were created.

Mining corporations carefully analyse various issues before deciding to mine because extracting anything from the earth involves time, money, and effort. The ore grade, for example, indicates how much of the desired precious element or combination occurs inside the parent rock. The rock is regarded an ore if the required component is present in sufficient concentration for processing to be viable. Larger grade ores have higher concentrations of the desired ingredient, and vice versa.

Fe304 contains both Fe²+ and Fe³+

Then we have to deduce the ratio of Fe²+ and Fe³+.

We know that

Fe0  + Fe2O3 ---------> Fe3O4

Fe in Fe0 is Fe(II)

Fe in Fe2O3 is Fe(III)

Then we have see that

on combine Fe 2+ with Fe3  , Fe304 is form

Hence,

The ratio of Fe²+: Fe³+ in Fe3O4 is 1:2

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Following are reactant and product states and the  balanced chemical equation for the specified chemical reaction: NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)

How do you balance a chemical equation?

Step 1: In both reactants and products, count each kind of atom.

Check whether there is exactly the same amounts of each atom on either side of the arrow. Otherwise, the equation is unbalanced, and you must move on to step 2.

Step 2: To increase the amount of atoms or molecules in the substances, place coefficients in front of the symbols or formulas as necessary. Make use of the fewest coefficients you can.  Chemical formulations should never have their subscripts changed. The substances involved in the reaction can be altered by changing subscripts. Only modify the coefficients.

Till the equation is balanced, go back and repeat steps 1 and 2.

Following are reactant and product states and the  balanced chemical equation for the specified chemical reaction:

In the reaction between sodium hydroxide and hydrogen chloride, sodium chloride and water are produced.

Hence,

NaOH(aq)+HCl(aq) → NaCl(aq)+H2O(l)

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2 NH3 + 3 CuO → 3 Cu + N₂ + H₂O in the equation the compounds that are on the left side were reactants and the compounds on the right side was products.

what is reactants and products?

Chemical reactions form and dissolve the chemical bonds that hold atoms together to form molecules. During a chemical reaction, the atoms are re organized; they become disengaged and reattached to one another in various ways, resulting in new compounds with diverse characteristics. Every chemical reaction has two parts:

Reactants – The beginning elements of a chemical reaction; what enters into the reaction

Usually written on the left side of a chemical reaction

Products — What is produced as a result of a chemical reaction.

Usually written on the right side of a chemical reaction.

among the given options the false statement was

H20 is a reactant was the false statement.

but the H2O was actually a product.

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The final temperature (°C) of the air at this elevation is 326.3K.

The temperature of a gas can be calculated using the combined gas law equation as follows:

P₁V₁/T₁ = P₂V₂/T₂

Where;

According to this question, 1.20L weather balloon on the ground has a temperature of 25.0°C and is at atmospheric pressure (1.00 atm). When it rises to an elevation where the pressure is 0.730 atm, then the new volume is 1.80L. The final temperature can be calculated thus:

1 × 1.2/298 = 0.730 × 1.8/T₂

0.004027T = 1.314

T = 326.3K

Therefore, 326.3K is the final temperature of the balloon.

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The difference between the molecules that have dipole forces and those that have London forces is that the molecules that have dipole forces are polar while those that have London forces are not.

We know that dipole forces are one of the kinds of intermolecular forces that exist. Let us note that a molecule is composed of the primary bond forces that hold the atoms of the molecule together and then the secondary bond forces that do hold the molecules together.

Now, the kind of interactions that exists between the molecules is the reason for the properties of the compound that we see. The molecules have not been shown here but I would discuss the properties of the London forces and the dipole forces.

Note that the molecules that do have the dipole forces have an electronegativity difference between the atoms of the molecule. The molecules that have the London forces are largely non polar.

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The metal that absorbs the greatest amount of heat energy is lead.

Heat energy is the result of the movement of tiny particles called atoms, molecules  liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.

The equation that relates the specific heat capacity to the heat absorbed by the metal is given by:

q= m[tex]C_{p}[/tex]ΔT       where q = heat absorbed by the the metal, m = mass  of the metal, [tex]C_{p}[/tex] = heat capacity of the metal and ΔT is the change in temperature

In the above given question, the mass of the metal and change in the temperature is the same for all the metals. Therefore, we can determine the metal that will absorb the lowest amount of energy by using the specific heat capacity.

From the equation the heat absorbed by the metal (q) is directly proportional to the specific heat ([tex]C_{p}[/tex]). Hence we can see that lead has the highest specific heat capacity and therefor Lead absorbs the maximum amount of heat.

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24.2 g of Argon has 0.6057 moles in it.

We know that the number of moles in a given mass of an element can be calculated by using the formula

⇒ No. of moles = [tex]\frac{Mass of the element }{Molar mass of the element}[/tex]  (i)

Here, the mass of the element Argon = 24.2 grams (ii)

The molar mass of Argon is = 39.948 a.m.u. (iii)

Using the values for the molar mass and mass of the element (ii and iii), we get

⇒ [tex]\frac{24.2}{39.948}[/tex]

⇒ 0.6057 moles present in the given mass of Argon.

Therefore, there are going to be 0.6057 moles in 24.2 g of Argon which is given.

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Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The correct option is option A.

Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.

Out of given compound, a polymer of ethene that is polyethylene will have highest molar mass. Polymer is a long chain of same or different monomer unit. Polymer has higher mass than the individual compound.

Therefore, option A is correct.

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Answer: polyethylene, a polymer of ethene

The nuclear equation for this reaction shows the gamma rays that are released when cobalt-60 is produced. 5927Co+10n⟶6027Co+γ

What is nuclear reaction ?

In nuclear physics and chemistry, a nuclear reaction is the process by which two atomic nuclei or nuclei and external particles collide to produce one or more new nuclides. Therefore, a nuclear reaction must transform at least one nuclide into another nuclide. When a nucleus interacts with another nucleus or particle and they separate without changing the properties of the nuclide, this process is simply called a form of nuclear scattering and is not a nuclear reaction.

Although in principle two or more particles could react and collide, the probability of three or more nuclei colliding in the same place at the same time is much lower than for two nuclei, so such Incidents are very rare.

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Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Zinc is the element, that represents the given electronic configuration.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

In the given electron configuration [Ar]4s²3d¹⁰. Argon has 18 electrons. So, we have to add 12 electrons from s and d subshells to 18. The total number of electrons that we get on adding is 30. The element that corresponds to atomic number 30 is zinc that is Zn.

Therefore, Zinc is the element, that represents the given electronic configuration.

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Yes. The reaction is an addition reaction.

Addition reactions are reactions where 2 or more reactants combine to form a single product. Addition reactions are otherwise known as synthesis reactions because they often result in the synthesis of new molecules entirely.

Generally, addition reactions can be represented by the following equation:

A + B ---> AB

They are quite different from decomposition reactions in which a single product decomposes to form 2 or more products or substitution reactions in which an atom displaces another atom in a compound.

Thus, the reaction [tex]A_2 + C_3H_6 --- > C_3H_6A_2[/tex] is an addition reaction.

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