Argon is a noble gas. How many electrons would you expect an atom of argon to have in its outer
shell?

When magnesium (Mg) is added to hydrochloric acid (HCl), a chemical reaction occurs, resulting in the formation of hydrogen gas (H₂).

The gas can be collected using various methods, such as displacement of water in a gas collection apparatus. To prove that the collected gas is indeed hydrogen, it can be tested using the "pop" test, where a flame is brought near the gas to observe a characteristic sound and a small explosion.

When magnesium reacts with hydrochloric acid, the following chemical equation reaction takes place: Mg + 2HCl → MgCl₂ + H₂. The magnesium displaces hydrogen from hydrochloric acid, resulting in the formation of magnesium chloride and hydrogen gas. This reaction is a redox reaction, where magnesium is oxidized and hydrogen is reduced.

To test the collected gas and confirm that it is hydrogen, the "pop" test can be conducted. A flame or a burning splint is brought near the opening of the gas collection apparatus. If the gas is hydrogen, it will ignite with a characteristic "pop" sound and a small explosion, indicating the presence of hydrogen gas.

By observing the characteristic properties of the collected gas during the "pop" test, one can confirm that it is indeed hydrogen gas formed from the reaction between magnesium and hydrochloric acid.

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When dissolved in a solvent, an electrolyte separates into ions and has the ability to conduct electricity, whereas a nonelectrolyte does not separate into ions and has neither of these properties.

The descriptions and classifications for the substances are as follows NaOH(s) - Nonelectrolyte HCl(aq) - Electrolyte C6H12O6(aq) - Nonelectrolyte (since it is not dissolved in a solvent) Electrolyte KNO3(aq), nonelectrolyte CH3OH(aq), and electrolyte NH3(aq) (to a limited extent due to its weak base nature) Water is an electrolyte and MgCl2(aq) is an electrolyte. It should be noted that a material's behavior in a solution determines whether it is an electrolyte or a nonelectrolyte, and the same chemical can act in a variety of ways depending on the solvent employed.

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Answer:

200Joules

Explanation:

W=Fd                                                                                                                                         W=10×20                                                                                                                             W=200J

Answer:

The answer is chlorine

Explanation:

Answer:

1s² 2s² 2p⁶ 3s²

Explanation:

La configuración electrónica muestra la secuencia de llenado de electrones en los orbitales de los subniveles guiada por algunos principios.

El número máximo de electrones en los orbitales de los subniveles es dos para el subnivel s (un orbital); seis para el subnivel p (tres orbitales); diez para el subnivel d (cinco orbitales) y catorce para el subnivel f (siete orbitales). Esto indica que el número máximo de electrones en un orbital es dos.

Se sabe que un elemento químico que tiene un número atómico Z = 12 y es un átomo neutro es Magnesio (Mg). Sin embargo, dado que tiene el mismo número de protones y electrones; La configuración electrónica esperada se puede escribir como:

1s² 2s² 2p⁶ 3s²

Answer:

Steak is abotic living organisms are abotic and steak was abiotic

Explanation:

Answer:

Steak would be considered biotic

Explanation:

why? because biotic can mean things which are derived from living organisms. Steak comes form cows, and cows and living organisms.

Answer:

electrons

Explanation:

since they are at the outer part of nucleus

Answer:

Weakly

Explanation:

Being farther from the nucleus and with more electrons shielding the protons results in the valence electrons being held weakly.

Answer:

Molecular Mass

Explanation:

It's asking for the numerical quantity. That quantity would be the Molecular Mass. Take the sample mass and divide it by the molecular mass to get the number of moles.

(14g N * 2) + (1g H *4) = 32g / mol of N2H4

To get # of moles, divide the sample mass by the molecular mass

25g / 32g = 0.78125 moles

Answer:

weight, length, speed

Answer: length, temperature, time, and mass.

Explanation:

In the text, it states "the metric system is a set of units for meauring length, temperature, time, and mass."

Mass of water vapor = 193 g

Given

435 kJ of heat are released

Required

mass of water vapor

Solution

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lv for water = 2256 kJ/kg or 2256 J/g or 40.7 kJ/mol

So the mass of water vapor :

\(\tt m=\dfrac{Q}{Lv}\\\\m=\dfrac{435000~J}{2256~J/g}\\\\m=192.8\approx 193~g\)

Answer:

it is alredy balanced

Explanation:

CaCO3 -------> CaO + CO2

In the reactant side In the product side

Ca = 1 atom Ca = 1 atom

C = 1 atom C = 1 atom

O = 3 atom O = 1+2 = 3 atom

so there is no need to balance it cause it is already balanced.

(2.03x10^22)/(6.02x10^23) = .033721 mol Li

I hope this helps, if not, i am sorry

La aspirina se prepara haciendo reaccionar ácido salicílico con exceso de anhídrido etanoico. En un experimento, 50.05 g de ácido salicílico se convirtieron en 55.45 g de aspirina. ¿Cuál fue el porcentaje de rendimiento?

In English:

Aspirin is prepared by reacting salicylic acid with excess ethanoic anhydride. In one experiment, 50.05 g of salicylic acid was converted to 55.45 g of aspirin. What was the yield percentage?

Answer:

el rendimiento porcentual para la cantidad dada de ácido salicílico es 84.99 %

In English:

the percent yield for the given amount of salicylic acid is 84.99%

Explanation:

La ecuación química equilibrada para la reacción se puede escribir como:

C₇H₆O₃ + C₄H₆O₃    →    C₉H₈O₄ + HC₂H₃O₂

Para la reacción mostrada arriba; El reactivo limitante de la reacción es el ácido salicílico. Ahora; calcular el porcentaje de rendimiento; se espera que primero determinemos el rendimiento teórico de la reacción.

Entonces; la fórmula para calcular el porcentaje de rendimiento: \(\mathbf {= \frac{actual \ yield }{theoretical \ yield } *100 }\)  

El rendimiento teórico se determina de la siguiente manera:

50.05 g * 1 mol / 138.21 g / mol de C₇H₆O₃ * 1 mol de C₉H₈O₄ / 1 mol de C₇H₆O₃ * 180.157 g / mol de C₉H₈O₄ = 65.24 g de C₉H₈O₄

Porcentaje de rendimiento \(\mathbf {= \frac{55.45 }{65.24 } *100 }\)

Porcentaje de rendimiento = 84.99%

Por lo tanto, el porcentaje de rendimiento para la cantidad dada de ácido salicílico es 84.99%

In English:

The balanced chemical eqaution for the reaction can be written as:

C₇H₆O₃ + C₄H₆O₃    →    C₉H₈O₄ + HC₂H₃O₂

For the reaction shown above;  The limiting reactant from the reaction is  salicylic acid. Now; to calculate the percentage yield ; we are expected to first determine the theoretical yield of the reaction.

So; the formula for calculating the percentage yield \(\mathbf {= \frac{actual \ yield }{theoretical \ yield } *100 }\)  

The theoretical yield is determined as follows:

50.05 g * 1 mol/ 138.21 g/mol of C₇H₆O₃ * 1 mol of C₉H₈O₄/ 1 mol of C₇H₆O₃ * 180.157 g/mol of C₉H₈O₄ = 65.24 g of C₉H₈O₄ is produced

Percentage yield \(\mathbf {= \frac{55.45 }{65.24 } *100 }\)

Percentage yield = 84.99%

Thus, the percent yield for the given amount of salicylic acid is 84.99%

Answer:

D. NH3

Explanation:

Hydrogen bonding exists only between hydrogen atoms, and is one of the strongest intramolecular forces. So you eliminate your choices down to B and D. HCl can't form Hydrogen bonding because of electron density and electronegativity but NH3 can, so your answer would be D.

If we have 1 mole of silver, we would need 0.5 moles of hydrogen sulfide to completely react with the silver.

Hydrogen sulfide (H₂S) is a colorless, flammable gas that has a strong odor of rotten eggs. It is a naturally occurring gas that is produced by the decay of organic matter and can be found in crude petroleum and natural gas deposits, volcanic gases, and hot springs. Hydrogen sulfide is also produced by human and animal wastes and is a byproduct of some industrial processes.

Hydrogen sulfide is toxic and can be deadly in high concentrations. It can cause irritation of the eyes, nose, and throat at low concentrations, and at higher concentrations, it can cause unconsciousness, coma, and death.

In addition to its toxic properties, hydrogen sulfide is also flammable and can form explosive mixtures with air. Despite its dangers, hydrogen sulfide has some uses in industry, such as in the production of sulfuric acid and in the refining of petroleum.

Balanced chemical equation for the reaction of hydrogen sulfide (H₂S) and silver (Ag) is:

2Ag + H₂S → Ag₂S + H₂

From the equation, we can see that 2 moles of silver reacts with 1 mole of hydrogen sulfide. Therefore, if we have 1 mole of silver, we would need 0.5 moles of hydrogen sulfide to completely react with the silver.

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The crude death rate in Rome in 2013 was 0.9269, or 0.9269 deaths per 1,000 people.

The crude death rate (CDR) is the number of deaths in a population divided by the total population, multiplied by a constant factor (usually 1,000 or 100,000) to express the rate per unit of population.

The formula for CDR is:

CDR = (Number of deaths / Total population) x Constant factor

We are given the following values:

Number of deaths (D) = 2.41 x 10^4

Total population (P) = 2.6 x 10^6

Constant factor = 1,000

Substituting these values into the formula for CDR, we get:

CDR = (D / P) x Constant factor

CDR = (2.41 x 10^4 / 2.6 x 10^6) x 1000

CDR = 9.269 x 10^-1

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Peptide bonds are an example of covalent bonding.

A chemical bond is a link between two atoms in a molecule. It is a chemical bond that binds atoms together. Covalent bonds are one of three main types of chemical bonds in the field of chemistry, the other two being ionic bonds and metallic bonds.

The electrons are shared between atoms in covalent bonds, resulting in stable molecules being formed. When two atoms share a pair of electrons, a covalent bond is formed. Both atoms are bound together by the bond's energy and, as a result, become more stable.  Examples of covalent bonds include bonds that are found in diatomic elements and compounds containing carbon (such as hydrocarbons).

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The condition that would most likely require the National Weather Service to issue a severe thunderstorm warning is "a meeting of two air masses with major differences in temperature and moisture."

Severe thunderstorms often form when there is a collision between two air masses with contrasting properties. This collision can create an unstable atmosphere and trigger the development of severe weather conditions, including thunderstorms.

When two air masses with significant differences in temperature and moisture interact, it creates a strong contrast in atmospheric conditions. The warm, moist air from one air mass clashes with the cooler, drier air from the other air mass. This clash sets the stage for intense convection and the potential for severe thunderstorm formation.

The collision of these air masses results in the rapid uplift of warm, moist air, leading to the formation of towering cumulonimbus clouds. These clouds are capable of producing severe weather phenomena, such as heavy rainfall, strong winds, hail, and even tornadoes.

Given the potential hazards associated with severe thunderstorms, including the risk of property damage and threats to human safety, it is crucial for the National Weather Service to issue timely warnings to alert the public and help them take necessary precautions.

By closely monitoring the conditions of air masses and identifying areas where major differences in temperature and moisture exist, meteorologists can anticipate the potential for severe thunderstorm development. This allows them to issue appropriate warnings and advisories to keep the public informed and safe during severe weather events.

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Answer: B.has the highest air pressure

Explanation:

The most electronegative atom is Flourine and the least is Hydrogen

The attached image indicates how the highly electronegative Fluorine atom takes away most of the electron density (red-to-blue colored cloud) from a hydrogen–fluoride covalent bond.

An electronegative atom is an atom that has a tendency to attract electrons towards itself when it is part of a chemical bond. The most common example is the oxygen atom. The ability of an atom to attract electrons is known as its electronegativity.

The higher the electronegativity of an atom, the more it will pull electrons towards itself. The electronegativity of an atom is determined by its atomic number and the number of electrons in its outermost shell.

Therefore, the correct answer is as given above

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The amount of sensible and latent heat of mass of 0.1 kg of water will be q₁ = 9.486 kJ, q₂ = 226 kJ, q₃ = 31.5 kJ, and \(\rm q _{total } = 226.986\) kJ.

It is a branch of science that deals with heat and work transfer.

A sample of water has a mass of 100 g.

The amount of heat required to change the sample from ice at -45.0°C to liquid water at 75.0°C.

We know that the state of water from -45.0°C to 0°C is solid that requires sensible heat (q₁), 0°C solid to 0°C liquid is a transition that requires latent heat (q₂), and 0°C to 75.0°C is liquid that requires sensible heat (q₃).

m = 0.1 kg

The specific heat capacity of ice is 2.108 kJ/kg-K.

The specific heat capacity of water is 4.18 kJ/kg-K.

The latent heat of water at 0°C is 2260 kJ/kg.

The sensible heat is required for ice from -45.0°C to 0°C will be

q₁ = m × c × (T₂ - T₁)

q₁ = 0.1 × 2.108 × [0 - (-45)]

q₁ = 9.486 kJ

The latent heat is required for ice to water at 0°C will be

q₂ = m × LH

q₂ = 0.1 × 2260

q₂ = 226 kJ

The sensible heat is required for water from 0°C to 75.0°C will be

q₃ = m × c × (T₂ - T₁)

q₃ = 0.1 × 4.18 × (75 - 0)

q₃ = 31.35 kJ

The total energy will be

\(\rm q _{total } = q_1 + q_2 +q_3\\\\q _{total } = 9.486 + 226 + 31.5\\\\q _{total } = 226.986\)

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Answer:

q1 = ⇒ 9.42 kJ

q2 = ⇒ 226 kJ

q3 = ⇒ 31.4 kJ

qtot = ⇒ 267 kJ

Explanation:

Classification of chemical reaction is as follows:

1. Addition reaction

2. Oxidation-reduction reaction

3. Isomerization reaction

4.  Nucleophilic substitution reaction

1. Ethene undergoes an addition reaction with bromine, where the double bond is broken, and each carbon atom forms a single bond with a bromine atom.

2. The oxidation-reduction reaction involves the conversion of 2-propanol to acetone through the loss of hydrogen atoms (oxidation) and gain of oxygen atoms (reduction).

3. The isomerization reaction occurs when glucose is enzymatically converted to fructose, leading to a rearrangement of the atoms within the molecule to form an isomer.

4. The reaction between methyl chloride and sodium hydroxide involves the substitution of a chlorine atom in methyl chloride by a hydroxide ion, resulting in the formation of methanol. This is a nucleophilic substitution reaction.

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Complete question is:

classify each chemical reaction as an addition, oxidation-reduction, isomerization, or nucleophilic substitution.

1) Ethene (C2H4) reacts with bromine (Br2) to form 1,2-dibromoethane (C2H4Br2).

2) 2-propanol (C3H8O) is oxidized to form acetone (CH3COCH3).

3) Glucose (C6H12O6) is converted to fructose (C6H12O6) in the presence of an enzyme.

4) Methyl chloride (CH3Cl) reacts with sodium hydroxide (NaOH) to form methanol (CH3OH).

To find the concentration of sulfide ion when hydroxide ion begins to precipitate, we need to determine the point at which the reaction between sodium sulfide and iron(III) nitrate produces a precipitate.

This reaction can be represented by the following balanced equation: Na2S(aq) + Fe(NO3)3(aq) → FeS(s) + 2NaNO3(aq) First, let's write the balanced equation for the reaction between potassium hydroxide and iron(III) nitrate:

3KOH(aq) + Fe(NO3)3(aq) → Fe(OH)3(s) + 3KNO3(aq)

From the balanced equation, we can see that for every 3 moles of potassium hydroxide (KOH), we get 1 mole of Fe(OH)3(s) precipitate.

Therefore, when hydroxide ion begins to precipitate, the concentration of sulfide ion will be equal to the concentration of potassium hydroxide. Given that the concentration of sodium sulfide is 1.27×10^(-2) M and the concentration of potassium hydroxide is 1.35×10^(-2) M, the concentration of sulfide ion [S^2-] at the point of precipitation is also 1.35×10^(-2) M. Therefore, the concentration of sulfide ion when hydroxide ion begins to precipitate is 1.35×10^(-2) M.

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The amount of boiling stones necessary in a distillation can vary depending on the specific requirements of the distillation setup and the volume of the liquid being distilled.

Boiling stones, also known as boiling chips, are added to the distillation flask to provide nucleation sites for the formation of bubbles and to prevent bumping or sudden violent boiling.

A general guideline is to add a small amount of boiling stones to the distillation flask, typically a few pieces (around 2-3), which is usually sufficient to promote smooth boiling.

The exact amount can also depend on the size of the flask and the nature of the liquid being distilled.

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Answer:

1500

Explanation:

I believe this is correct but am not sure, I shall update when I submit my quiz...

You can substitute the given temperature, 313 K, into the equation along with the value of R to calculate the Kp value.

The question asks us to calculate the Kp value for the given reaction at 313 K. The reaction is represented as:

x(g) + 2y(g) ↔ 2z(g)

We are given the Kc value, which is 0.0689 at 313 K. Kc is the equilibrium constant expressed in terms of concentrations. In order to calculate Kp, the equilibrium constant expressed in terms of partial pressures, we can use the ideal gas law.

The ideal gas law states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

To calculate Kp, we need to relate the partial pressures of the gases to their concentrations. Since the reaction involves the gases x, y, and z, we can assume that the gases behave ideally.

Let's assume that the initial partial pressures of x, y, and z are Px0, Py0, and Pz0 respectively.

At equilibrium, the partial pressures will be Px, Py, and Pz.

Using the stoichiometry of the reaction, we can write the equilibrium expression in terms of partial pressures:

Kp = (Pz)^2 / (Px * Py^2)

To find Kp, we need to determine the relationship between concentrations and partial pressures. We can use the ideal gas law to relate the number of moles and partial pressures:

P = (n/V) * RT

Since the volume and temperature are constant, we can rewrite the equation as:

P = (n/V) * R * T

Since the moles and volume are constant, the ratio of partial pressures is equal to the ratio of concentrations:

(Px / Py^2) = (Cx / Cy^2)

Therefore, we can rewrite the equilibrium expression in terms of concentrations:

Kc = (Cz)^2 / (Cx * Cy^2)

Since Kp and Kc are related by the equation:

Kp = Kc * (RT)^∆n

Where ∆n is the difference in the number of moles of gaseous products and gaseous reactants.

In this case, ∆n = (2-1-2) = -1.

Substituting the values into the equation, we get:

Kp = Kc * (RT)^-1

Kp = 0.0689 * (R * T)^-1

Kp = 0.0689 / (R * T)

Where R is the ideal gas constant and T is the temperature in Kelvin.

Please note that the ideal gas constant R is 0.0821 L·atm/(mol·K).

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Answer:

1 mole is equal to 1 moles Copper(II) Oxide, or 79.5454 grams. Note that rounding errors may occur, so always check the results.

Explanation: