3. describe natural sources of radiation. infer some of the dangers that radiation can impose.

An elementary step is characterized by its molecularity which is equal to the number of reactant particles in the step

A one-step reaction is referred to as an elementary reaction. The coefficients of the reactants in the balanced equation can be used to get the rate law for an elementary reaction. For instance, rate = k[A]2[B] is the rate rule for the elementary reaction 2A + B products.

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The persistence of vision is regarded as an optical illusion but it is actually part of human physiology.

The term persistence of vision is the idea that an object is able to remain is sight for a long time even when the object has been removed. This is often used by performers to create a remarkable impression on the audience. The persistence of vision is regarded as an optical illusion but it is actually part of human physiology.

The way that a performance can be designed to make the audience to know that this is the most important scene is called follow through.

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Answer:

A

Explanation:

If its going at a constant speed it will not accelarate wich means to speed up.

Answer:

This is called combination reaction

Answer: The hybridization that is involved in SF4 is sp3d type. Here will learn and understand how to determine SF4 hybridization. We will discuss the steps in detail.

Name of the Molecule Sulphur Tetrafluoride

Molecular Formula = SF4

Hybridization Type = sp3d

Bond Angle = 102o and 173o

Geometry = see-saw

Explanation:

In order to determine the hybridization of sulphur tetrafluoride, you have to first understand its Lewis structure and the number of valence electrons that are present. The SF4 molecule consists of a total of 34 valence electrons. Here 6 will come from sulphur and each of the four fluorine atoms will have 7 electrons.

During the formation of SF4, the sulphur atom will form bonds with each of the fluorine atoms where 8 valence electrons are used. Meanwhile, the four fluorine atoms will have 3 lone pairs of electrons in their octet which will further utilize 24 valence electrons. In addition, two electrons will be kept as lone pairs in the sulphur atom. Now we can determine sulphur’s hybridization by taking a count of the number of regions of electron density.

When bonding takes place there is a formation of 4 single bonds in sulphur and it has 1 lone pair. Looking at this, we can say that the number of regions of electron density is 5.

EXTERNAL LINKS :

https://www.chemtube3d.com/vseprshapesf4/

https://geometryofmolecules.com/sf4-lewis-structure-polarity/

Answer:

One of the elements must be a metal and another be a non metal.

One of the elements must lose electrons and the other must gain electrons.

The identity of the daughter nuclide from the positron emission of c-11/6  is option c)11/5-b

What is beta decay?

In the radioactive decay process known as beta decay, a parent nucleus emits an electron (or positron). An electron and a neutron can separate from certain neutrons in the parent nucleus. The parent nucleus will emit an electron, followed by the production of a further proton, increasing the atomic number. In terms of nuclear physics, some elements in group A can form daughter nuclei of elements that are next to them in the periodic table. Let's call it B in this situation.:

NZA→ 0−1e+NZ+1BZNA→ −10e+Z+1NB

where:Z is the atomic number,N is the mass number

If the emission is a positron, then the process is:

NZA→ 0+1e+NZ−1BZNA→ +10e+Z−1NB

So from the following equation we learn

11(top) 6(bottom) C ---> 0(top) 1(bottom) e + 11(top) 5(bottom) B

Therefore the identity of the daughter nuclide from the positron emission of c-11/6  is option c)11/5-b

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It should be noted that when Brian first sorted out his thoughts, the first thing that he thought would happen next is that he would probably be rescued that day.

It should be noted that in Chapter 5 of Hatchet, Brian wakes up in the forest and then, he realized that he was desperately thirsty.

When Brian first sorted out his thoughts, he figured this was the first day after the crash and that he would probably be rescued that day. He believed that he was going to wither up and die if he doesn't get anything that he'll drink.

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If a burst of light had a total energy of 4.50 kJ, it can release 0.0468 moles of electrons.

This number is calculated by dividing the total energy by the energy per mole of electrons, which is equal to the Faraday constant (96,485 C/mol). In this case, the answer is approximately 0.0468 moles of electrons.

The Faraday constant is a measure of the amount of electrical charge that is released when one mole of electrons is passed through an electrical circuit.

This constant is important because it allows us to calculate how many moles of electrons can be released when a certain amount of energy is present.

By dividing the total energy of 4.50 kJ by the Faraday constant, we can determine the number of moles of electrons that can be released.

Although a part of your question is missing, you might be referring to this question:

A burst of light is being emitted through a photon.

If a burst of light described above had a total energy of 4.50 kj, how many moles of electrons can be released?

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The mass of a sample of platinum that has a volume of 3.50 cm³ and a density of 21.45 g/cm³ is 75.075 gm.

Solution :

∵ density = mass ÷ volume

so,  mass = density × volume

∴ mass of platinum sample = (density of sample) x (volume of sample)

                                             = 21.45 × 3.50

   mass of platinum sample = 75.075 gm

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Answer: c

Explanation:

The incorrect statement regarding the reaction between aqueous solutions of aluminum nitrate, Al(NO3)3, and ammonium carbonate, (NH4)2CO3, which form a precipitate of aluminum carbonate, Al2(CO3)3 is If 0.5 mole of (NH4)2CO3 react with sufficient Al(NO3)3, 3 moles of Al2(CO3)3 will be formed. Option C.

A chemical equation is a description of the chemical reaction that takes place. It contains the formulae of the reactants and products separated by an arrow. The arrow indicates the direction of the reaction. The stoichiometric coefficients in the equation represent the number of moles of each substance involved in the reaction.

Stoichiometry is a branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It's important to keep in mind that the law of conservation of mass applies to chemical reactions. This means that the number of atoms of each element present in the reactants must equal the number of atoms of that element present in the products. Thus, stoichiometry plays a significant role in determining how much product is formed from a given amount of reactant and vice versa. Option C.

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To find the concentration of HCl, we need to calculate the moles of base added to neutralize the acid, the moles of acid originally in the beaker, and then use these values to determine the molarity of HCl.

a) To find the moles of base (NaOH) added, we can use the formula:

Moles of NaOH = Volume of NaOH (in L) × Molarity of NaOH

Converting the volume to liters and using the given values:

Moles of NaOH = 0.080 L × 2.5 mol/L = 0.2 mol

b) Since the reaction is a 1:1 stoichiometric ratio between NaOH and HCl, the moles of acid (HCl) will be equal to the moles of base added. Therefore, there were also 0.2 mol of HCl originally in the beaker.

c) Now, we can calculate the molarity of HCl using the formula:

Molarity (M) = Moles of solute / Volume of solution (in L)

Given that the volume of the acid is 100.0 mL (or 0.100 L) and the moles of acid is 0.2 mol:

Molarity of HCl = 0.2 mol / 0.100 L = 2.0 M

Therefore, the molarity of the HCl solution is 2.0 M.

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Leonard uses a gas stove in a poorly ventilated kitchen, the gas which could rise to dangerous levels in Leonard's kitchen is Carbon Monoxide, option B.

Carbon monoxide is a toxic, combustible gas that has no colour, flavour, or taste and is slightly less dense than air.

When carbon monoxide accumulates in your bloodstream, it causes carbon monoxide poisoning. When there is an excessive amount of carbon monoxide in the air, your body replaces the oxygen in your red blood cells with carbon monoxide. This can result in severe tissue damage or even death.

Carbon monoxide is a colourless, odourless, and tasteless gas that is created when gasoline, wood, propane, charcoal, or any fuel is burned. Improperly vented appliances and engines, particularly in a closely sealed or enclosed location, may allow lethal quantities of carbon monoxide to develop.

If you suspect that you or someone you're with has carbon monoxide poisoning, get some fresh air and seek immediate medical attention.

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Answer: C

Explanation: Took the test

Answer:

Li and N

Explanation:

Answer:

c

Explanation:

I really don't know and i just guessed

Answer:

i think it is FALSE.

Explanation:

good luck

The absolute pressure of intergalactic space is very low, about 10⁻¹⁷ pascals.

This is because there is very little matter in intergalactic space. The average density of hydrogen atoms in intergalactic space is about one atom per cubic centimeter, and the temperature is about 6 × 10³ K. The pressure can be calculated using the following equation:

Pressure = nkT / V

where:

n = number density of particles

k = Boltzmann constant

T = temperature

V = volume

Plugging in the values:

Pressure = (1 atom/cm³)(1.38 × 10⁻²³ J/K)(6 × 10³ K) / (1 cm³)

= 10⁻¹⁷ Pa

This is a very low pressure, about a trillion times less than the atmospheric pressure at sea level.

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Answer:

Acid Rain

Explanation:

Because it was even the main reason for discoloration of Taj mahal over years.

Hope it was helpful !

Another word which can be used to replace gas is air.

Air is a gas simply because it is a mixture of a number of gases. In order words, air consists of different gases including hydrogen gas, oxygen gas, carbon dioxide gas, rare or noble gases, dust, moisture, nitrogen gas and so on and so forth. Because air is an embodiment of different gases, it is on this premise that the word " air " can be used instead of gas.

However, there are so many other words which can be used as synonyms for gas or to replace gas; among which include: fart, vapor or even steam.

So therefore, we can now confirm from the detailed explanation above that when we talk about gas, we are referring to air as well.

Complete question:

What is another word for gas?

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The angle between the two O-H covalent bonds in a molecule of water is approximately 104.5 degrees (to the tenth place).

Water, also known as H2O, has a tetrahedral molecular shape, which means it has four electron pairs and two lone pairs. This causes the O-H bonds to be pushed down from a perfect tetrahedral angle of 109.5 degrees to approximately 104.5 degrees, causing the bond angle to be less than the ideal angle.

Because of the unequal distribution of electron density, the H-O-H bond angle in water is bent, and its molecular shape is described as a V-shape or bent shape. When an oxygen atom is covalently bonded to two hydrogen atoms, it forms a water molecule, and the O-H bond angle is approximately 104.5 degrees (to the tenth place).

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Of the compounds below, a 0.1 M aqueous solution of KCN, Ka of HCN = 4.0 × 10⁻¹⁰ will have the highest pH.

The pH is given as :

pH = pka + log [base] / [acid]

ka for the HCN is 4.0 × 10⁻¹⁰ , the pka = -log ka.

pka = - log (4.0 × 10⁻¹⁰)

pka = 9.30

pH = pka + log [KCN ] / [HCN]

The KCN  is the salt of the strong base and the weak acid. The salt of the weak acid and the strong base will have the highest pH . so among the given option , the salt of weal acid and the strong base is the KCN, Ka of HCN = 4.0 × 10⁻¹⁰.

The question is incomplete, the complete question is :

Of the compounds below, a 0.1 m aqueous solution of ________ will have the highest ph.

NaOAc, Ka of HOAc = 1.8 × 10⁻⁵

NaClO, Ka of HClO = 3.2 × 10⁻⁸

NH₄NO₃, Kb of NH3 = 1.8 × 10⁻⁵

KCN, Ka of HCN = 4.0 × 10⁻¹⁰

NaHS, Kb of HS- = 1.8 × 10⁻⁷

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Answer:

i do not know

Explanation:

Answer:

a

Explanation:

I'm not completely sure tho veary sorry if it's wrong

Answer:

the answer is C

Explanation:

as the yeast feeds on sugar and yields the ATP per glucose molecule and Carbon dioxide

Answer:

B

Explanation:

Both plain and plateau have flat surfaces. However, a plain is located in a low-lying area while a plateau is located on an elevated area. In essence, a plateau can be viewed as an elevated plain or a plain that is bordered by cliffs.

The correct option is B.

Answer:

solid rock

Explanation:

696.32 mmHg is the final pressure of the gas.

The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.

Given data:

\(P_1\) = 720 mmHg              

\(P_2\) = ?

\(n_1\) = 2.5 mol                

\(n_2\) = 3.2 mol

\(V_1\) = 34 L            

\(V_2\) = 45 L

Formula

Combined gas law

\(\frac{P_1 V_1}{n_1} = \frac{P_2 V_2}{n_2}\)

\(P_2\) = 696.32 mmHg

Hence, 696.32 mmHg is the final pressure of the gas.

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