1000 silver atom weight 1.79×10^-19 g. calculate atomic mass of silver​

To enhance the concentration of u-235 and u-238, uranium must first be separated.

About 0.72 percent of naturally occurring uranium is the uranium-235 isotope. It is fissile, meaning it can sustain a nuclear chain reaction, unlike the prevalent isotope, uranium-238. It is the sole fissile isotope that was created as a primordial nuclide in nature.

The process of boosting the amount of uranium-235, which makes up only approximately 0.7 percent of natural uranium, to between 3 and 5 percent for use as nuclear reactor fuel. Gaseous diffusion, gas centrifuges, or laser isotope separation can all be used for enrichment.

By using lasers to separate the different isotopes of uranium, uranium can be enriched. Laser light has the ability to excite molecules, a process known as photoexcitation. A particular isotope's characteristics can be altered and it can be separated if the electrons have more energy thanks to the use of lasers.

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Answer:

electrons

Explanation:

electricity is the flow of electrons through a conductor

Answer:

protons

Explanation:

and neutrons never move from object to object. The energy that comes from these charged particles is called electrical energy.

Answer: things arnent always as they seem

Explanation:

False. A delocalized cloud containing electron density makes up orbitals. An electron from the valence band or ion that would be delocalized is one that is not bound to another atom a covalent bond.

A covalent bond is formed when two atoms exchange one or more sets of electrons. The two protons and neutrons are concurrently drawing these electrons to them. When there is a difference in the ionization energy of two atoms, a covalent connection is created.

Single hydrogen bonding, double hydrogen bonding, and triple side chains are the three varieties of covalent bonds. One sigma and one pi link make up a double covalent bond, while two pi but one sigma binding make up a triple covalent bond.

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Answer:

Impure substances tend to have a slightly lower melting point than the pure substance.

Explanation:

4.20325g of oxygen was used.

The reaction described is represented chemically by the equation 4NH3 + 5O2 = 4NO + 6H2O.

Ammonia produced by industry is used as fertilizer in agriculture to the tune of 80%. In addition to these uses, ammonia is made into polymers, explosives, textiles, insecticides, dyes, and other chemicals. It is also used to purify water sources.

As a result, 4 moles of NH3 and 5 moles of O2 react.

The molar mass of 1 mole of oxygen is 2 * 16 = 32g.

5 moles of oxygen are equal to 5 * 32, or 160g.

68g is equal to 4 (14 + 3*1) moles of NH3.

68g of NH3 reacts with 160g of O2 as a result.

However, we only have 9.89 g of oxygen.

68g and 160g interact.

9.89 and Xg react to form 4.20325g (Xg = 68*9.89/160).

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Answer:

Events that happen over and over form a pattern

No, a mixture of KI and Na2SO3 would not perform the same reduction and precipitation of copper(II) as a mixture of NaI and Na2SO3. This is because the reducing power of the two mixtures is different due to the different nature of the cations (K+ vs Na+).

What is Reduction?

Reduction is a chemical process in which a substance gains electrons and undergoes a decrease in oxidation state. It is a key aspect of many chemical reactions, including combustion, corrosion, and the synthesis of organic compounds.

In the reduction of copper(II) to copper(I), iodide ion (I-) acts as the reducing agent, which gets oxidized to iodine (I2). In the presence of sodium sulfite (Na2SO3), the iodine reacts with sulfite ion (SO32-) to form iodide ion and sulfate ion (SO42-), while copper(I) ions get precipitated as copper(I) sulfite.

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Answer:

Benzyl Acetate C9H10O2

Explanation:

Answer:

Np

Explanation:

No problem m8374893724873284972384823749832748937249873298478274923874983249872398479832497234

FALSE. The presence of a plaster ring does not affect the available volume for box fill calculations.

When a plaster ring is installed on a four-inch square junction box, it does not increase the available volume for the purposes of calculating box fill. The volume of the junction box remains the same regardless of the presence of a plaster ring.

The purpose of a plaster ring is to provide a surface for attaching the box to a wall or ceiling and to help protect the electrical wiring and connections within the box. It does not alter the internal volume of the junction box.

The volume of a junction box is important for determining the number and size of wires and devices that can be safely installed within the box while complying with electrical code regulations. The box fill calculation considers the internal dimensions of the junction box itself and does not take into account any external attachments or accessories like plaster rings.

Therefore, the presence of a plaster ring does not affect the available volume for box fill calculations.

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The pressure exerted by 4.24 g of helium gas, He, at 10.0 °C when placed in a 470. ml container is 26.1 atm.

The ideal gas equation is :

P V = n R T

p = n R T / V

where,

P = pressure of the gas

V = volume of the gas = 0.470 L

n = moles

R = gas constant

T = temperature = 10 °C = 283 K

The moles of the He = mass / molar mass

                                   = 4.24 / 8

                                   = 0.53 mol

Therefore, the pressure is :

P = n R T / V

P = ( 0.53 × 0.082 × 283 ) / 0.470

P = 26.1 atm

Thus, The pressure is 26.1 atm.

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Answer:B

Explanation: according  to the law of electrostatics it states that  "unlike charge attract each other and like charges repel each other ".

Answer:

Explanation:

The reactivity of elements in the periodic table is based on the number of electrons in there outermost shell. Elements (metals) that have few electrons in there outermost shell are highly reactive because it is easier to lose fewer number of electrons (in the outermost shell during a reaction) than to lose more electrons in the outermost shell - thus metals that have one electron in there outermost shell are most reactive and are more reactive than those that have two electrons in there outermost shell. Hence, metals in group 1 are the most reactive metals because they all have one electron in there outermost shell.

Non-metals that have fewer electrons to complete there octet configuration are highly reactive because it is easier to gain fewer number of electrons (in the outermost shell during a reaction) than to gain more number of electrons - thus nonmetals that have seven electrons in there outermost shell are more reactive than nonmetals that have six electrons in there outermost shell. Hence, nonmetals in group 17 are the most reactive nonmetals because they contain seven electrons and have just one electron left to complete there octet configuration.

Answer:

Rubidium

Explanation:

Rubidium has atomic number 37 and belong to group one alkali metals and has one valence electron at the outermost shell whiz is 5s1

The given electronic configuration is that of element rubidium which is a s-block element with one valence electron.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Thus,  given electronic configuration is that of element rubidium which is a s-block element with one valence electron.

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Answer: The answer is 41.5 C

(45.0 g)(x - 20 C) = (22.3 g)(85 C - x )

45.0x + 900 C = 1895.5 C - 22.3x

+22.3 x - 900 C = -900 C + 22.3 x

67.3x = 2795.5

2795.5 / 67.3 = 41.54 C

Explanation:

In an emergency, the best method of contacting help in your community is to call the local emergency services number, such as 911 in the United States.

This will connect you to a dispatcher who can send police, fire, or medical assistance to your location as needed. Make sure to provide clear and accurate information about the situation, your location, and any relevant details to ensure a timely and effective response from the emergency services.

Stay calm and follow any instructions given by the dispatcher until help arrives.

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Answer:

The bond order is 1.091

Explanation:

there really is no explanation.

The manufacture of ammonia by Haber's process is an example of homogenous catalysis. Homogeneous catalysis refers to a catalytic process where the catalyst is in the same phase as the reactants, typically a liquid or gas.

In the case of Haber's process, the reaction involves the combination of nitrogen and hydrogen gas to produce ammonia gas. This reaction is catalyzed by iron in the form of Fe3O4, which is present in the reaction mixture as a homogeneous catalyst. The iron catalyst speeds up the reaction by lowering the activation energy required for the reaction to occur, without being consumed in the reaction itself. This allows for greater efficiency in the production of ammonia.
The hydrogenation of oil is an example of heterogeneous catalysis, as the catalyst is typically a solid material that is in a different phase than the reactants. The manufacture of sulfuric acid by contact process and the hydrolysis of sucrose in the presence of dilute hydrochloric acid also involve heterogeneous catalysis.
In summary, the manufacture of ammonia by Haber's process is an example of homogenous catalysis, where the catalyst is in the same phase as the reactants.

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Answer:  the number of grams of AgNO3 present in its 7.4 moles is 1257.

Answer:

C

Explanation:

because it is product over reactants. hope this helps :)

The equilibrium expression for the reaction C(s) +\(O_{2}\)(g) ⇄ \(CO_{2}\) (g) will be

[\(CO_{2}\) ] / [ \(O_{2}\) ].

Chemical equilibrium is a state where no net change in the quantities of reactants as well as products takes place during a reversible chemical reaction.

The given reaction is C(s) +\(O_{2}\)(g) ⇄ \(CO_{2}\) (g) .

It is known that solid phase is not considered in equilibrium.

Hence, equilibrium expression = [\(CO_{2}\) ] / [ \(O_{2}\) ].

Therefore, the correct answer will be option (D).

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Answer:

Released

Explanation:

Answer:

making drinks, purifying water

Explanation:

When an acid such as hydrochloric acid (HCl) reacts with a metal like zinc (Zn), the gas produced is hydrogen gas (H₂).

When hydrochloric acid (HCl) reacts with zinc (Zn), something interesting happens. The acid gives away its hydrogen atoms (H⁺) to the zinc. At the same time, the zinc gives away some of its electrons. As a result, hydrogen gas (H₂) is produced. The gas forms little bubbles that you might see during the reaction. The remaining zinc combines with the chlorine atoms (Cl⁻) from the acid to form zinc chloride (ZnCl₂). So, to sum it up, when acid (like HCl) and metal (like zinc) react, they create hydrogen gas and a compound called zinc chloride. The hydrogen gas bubbles out, and the zinc chloride dissolves in the remaining acid.

A single displacement reaction, also known as a metal-acid reaction, occurs when hydrochloric acid (HCl) and zinc (Zn) are in contact. This reaction results in the creation of zinc chloride (ZnCl₂) and hydrogen gas (H₂) as the zinc metal displaces the hydrogen in the hydrochloric acid. While the acid's hydrogen ions lose electrons and undergo oxidation, the zinc atoms acquire electrons and undergo reduction. It is a redox (reduction-oxidation) reaction because it includes both oxidation and reduction reactions.

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Answer:

Competition

Explanation:

Peppered moths get their color in lieu to become the fittest among all so that they can survive easily. During industrial age, when pollution suddenly became high these moths changed their color through evolution in order to save themselves from their predators.

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The animal bone is approximately 19,028 years old based on the 40% loss of carbon-14.

To determine the age of an animal bone based on the percentage of carbon-14 remaining, we can use the concept of half-life. The half-life of carbon-14 is approximately 5,750 years, which means that after this time, half of the carbon-14 originally present will have decayed.

If the bone has lost 40% of its carbon-14, it means that only 60% of the original carbon-14 remains. We can calculate the number of half-lives that have passed to reach this percentage.

Let's assume the original amount of carbon-14 in the bone was 100 units. After one half-life, 50 units of carbon-14 would remain (50% of the original amount). After two half-lives, 25 units would remain (50% of 50 units). Similarly, after three half-lives, 12.5 units would remain (50% of 25 units).

To find out how many half-lives it took to reach 60%, we can set up the following equation:

12.5 units (remaining amount) = 100 units (original amount) * (1/2) ^ n (number of half-lives)

Solving for n:

12.5 = 100 * (1/2) ^ n

Dividing both sides by 100:

0.125 = (1/2) ^ n

Taking the logarithm of both sides:

log(0.125) = log[(1/2) ^ n]

n * log(1/2) = log(0.125)

n = log(0.125) / log(1/2)

Using a calculator, we can find:

n ≈ 3.3219

Therefore, approximately 3.3219 half-lives have passed.

Since each half-life is approximately 5,750 years, we can calculate the age of the bone:

Age = Number of half-lives * Half-life duration

Age = 3.3219 * 5,750 years

Age ≈ 19,028 years

Thus, the animal bone is approximately 19,028 years old based on the 40% loss of carbon-14.

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Answer:

compression

Explanation:

Hope it helps!!!!!!!!!!

the density of the oxygen gas sample is 1.123 g/L. The density of a gas can be calculated using the ideal gas law equation: Density = (Molar mass * Pressure) / (Gas constant * Temperature) In this case, we are given that the density of oxygen gas is g/L. We also know the pressure is 0.893 atm and the temperature is 41 °C.

To convert Celsius to Kelvin, we add 273.15 to the Celsius temperature. So, the temperature in Kelvin is 41 + 273.15 = 314.15 K. Now, let's solve the equation for density using the given values Density = (Molar mass * Pressure) / (Gas constant * Temperature) To use the ideal gas law equation, we need to convert the temperature to Kelvin.


Since the molar mass of oxygen is 32 g/mol and the gas constant is 0.0821 L·atm/(mol·K), we can substitute these values into the equation g/L = (32 g/mol * 0.893 atm) / (0.0821 L·atm/(mol·K) * 314.15 K) Now, we can calculate the density by simplifying the equation.

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According to the question 100.3 is the possible boiling point for a 1.0 M solution of sugar in water.

Boiling point is the temperature at which a liquid changes to a gas or vapor. It is the temperature at which the vapor pressure of the liquid becomes equal to the atmospheric pressure. Water boils at 212°F (100°C) at sea level, but the boiling point decreases as altitude increases. Boiling point is an important property of liquids and is used to separate mixtures of liquids, to determine the purity of a substance, and to measure the composition of a mixture of liquids.

100.3 is the possible boiling point for a 1.0 M solution of sugar in water. The boiling point of a solution will be higher than that of pure water due to the increased solute concentration. The increase in boiling point is dependent on the molarity (moles of solute per liter of solution) of the solution. For a 1.0 M solution of sugar, the boiling point should be about 100.3 degrees Celsius.

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Answer:

Mountain ranges and prevailing winds.

Explanation:

Mountain ranges and prevailing winds are the factors that is responsible for the difference in the precipitation between Nevada and Washington states. The Washington state is located along the coastal region of pacific ocean and having more mountain ranges which causes more rainfall in that region while on the other hand, Nevada state comprise of plateau, basins and far away from the ocean which is the main cause of lower rainfall as compared to Washington state.