what volume is occupied by 18.0 g of argon gas at a pressure of 1.32 atm and a temperature of 454 k ?

Answer:

D

Explanation:

Energy is conserved in all chemical changes except burning. Therefore, the correct option is option D.

Chemical power The bonds within chemical molecules contain energy. Exothermic reactions are those in which chemical energy is released during the reaction, which usually takes the form of heat. Some of the heat energy needed for a reaction to continue can be stored as chemical energy within newly created bonds.

The body transforms the chemical energy within food into heat and mechanical energy. At a power plant, coal's chemical energy is transformed into electrical energy. Via the process of electrolysis, the chemical energy inside a battery can also generate electricity. Energy is conserved in all chemical changes except burning.

Therefore, the correct option is option D.

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The pressure inside the syringe is 0.68 Pa

The ideal gas law, also known as the general gas equation, is the equation of state for a hypothetical ideal gas. It has some limitations, but is a good approximation of the behavior of many gases under many conditions.

It is specified by the following formula:

PV = nRT

P =  nRT/V

n = mass/ molar mass

n = 0.1/28

n = 0.003 moles

R = 8.314 J/(mol.K)

T = 0°C or 273 K

V =  10 ml

P =  nRT/V

P =  0.003× 8.314×273/10

P = 0.68 Pa

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Answer:

A compound is a material formed by chemically bonding two or more chemical elements.

Explanation:

When a molecule of oxygen (O2) is combined with an atom of carbon (C), they form CO2, or carbon dioxide. The carbon and oxygen are the reactants in this chemical reaction; the CO2 is the product.

Answer:

Explanation:

When a molecule of oxygen (O2) is combined with an atom of carbon (C), they form CO2, or carbon dioxide. The carbon and oxygen are the reactants in this chemical reaction; the CO2 is the product.

The correct option is $26785.To calculate the total cost per equivalent unit using the weighted average method, we need to consider the costs incurred in both the beginning work in process and the units added during the period.

First, let's calculate the equivalent units of production for both conversion and materials:

Conversion costs:

Beginning work in process: 400 units × 20% complete = 80 equivalent units

Units added during the period: 2,000 units × 40% complete = 800 equivalent units

Total equivalent units for conversion = 80 + 800 = 880 equivalent units

Material costs:

Beginning work in process: 400 units × 30% complete = 120 equivalent units

Units added during the period: 2,000 units × 50% complete = 1,000 equivalent units

Total equivalent units for materials = 120 + 1,000 = 1,120 equivalent units

Next, let's calculate the total costs incurred:

Conversion costs:

Beginning work in process cost: $14,880

Costs added during the period: $409,200

Total conversion costs = $14,880 + $409,200 = $424,080

Material costs:

Beginning work in process cost: $9,900

Costs added during the period: $180,080

Total material costs = $9,900 + $180,080 = $189,980

Now, we can calculate the total cost per equivalent unit:

Total cost per equivalent unit = (Total conversion costs + Total material costs) / (Total equivalent units for conversion + Total equivalent units for materials)

Total cost per equivalent unit = ($424,080 + $189,980) / (880 + 1,120)

Total cost per equivalent unit ≈ $267.85

Therefore, the correct option is $26785.

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Stoichiometry is a branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It involves using chemical equations, which are like recipes, to determine the ratio of ingredients needed for a reaction.

The mole is a unit of measurement in chemistry that is used to ensure that the appropriate ratio of reacting particles is used for a particular reaction. A mole represents a certain number of particles, which is called Avogadro's number (6.02 x 10²³). By knowing the number of moles of a reactant, one can determine the number of moles of another reactant needed for the reaction to proceed in the appropriate ratio. This is important because chemical reactions are all about the ratio of reactants, not the absolute amounts.

Moles can also be used to determine the amount of product that will be generated by a reaction. This is done by using stoichiometry, which involves balancing the chemical equation and using mole ratios to calculate the amount of product that will be formed. This is important for industries that produce chemicals on a large scale, as they need to know how much product they will get from a certain amount of reactants.

In summary, stoichiometry is a fundamental concept in chemistry that involves using chemical equations and mole ratios to determine the appropriate ratio of ingredients for a reaction and the amount of product that will be generated. The mole is a unit of measurement that plays a crucial role in stoichiometry, as it ensures that reactions proceed in the correct ratio of reactants.

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Therefore, +17 + (-10) = +7 is the effective nuclear charge. Simply counting the number of electrons in the outer shell—without applying any charges—will get the same result. That would be the 3s2 3p5 for Cl, where 2 + 5 = 7.

Use the formula Zeff = Z - S, where Z is the atomic number and S is the number of shielding electrons, to calculate the effective nuclear charge of an atom. By deducting the number of valence electrons from the total number of electrons in the atom or ion, one can calculate the number of shielding electrons. Effective nuclear charge (Zeff) is an atom's net positive charge that attracts an electron. The closest estimate of this net charge is. Effective nuclear charge (Zeff) is calculated as Z minus Zcore.

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Answer:

C

Explanation:

Answer:

Hydrogen peroxide does not make a good antiseptic for open wounds because catalase in human tissues neutralizes it.

Explanation:

The neutralization of hydrogen peroxide by the enzyme catalase present in the cells of an open wound can cause damage to the cells and impede the healing process, making hydrogen peroxide not a good antiseptic for open wounds.

When it comes in contact with the living tissue, the enzyme catalase catalyzes the breakdown of the hydrogen peroxide into water and oxygen. This process can generate heat and cause damage to the cells in the area. Additionally, the breakdown of hydrogen peroxide can also generate free radicals, which can further damage the cells in the wound. Furthermore, the neutralization of hydrogen peroxide by catalase can cause the wound to dry out, making it more difficult for new cells to grow and the wound to heal.

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Answer:

Alex forgot to get a flu shot and missed two weeks of school

The balanced chemical equation for the given reaction is: 2IrCl3(aq) + 3NaOH(aq) → Ir2O3(s) + 3HCl(aq) + 3NaCl(aq)

Use the atomic masses to translate each element's mass into moles. By dividing the total number of moles by the smallest number of moles, you may determine the ratio or the number of moles of each element.

The mole ratio of the reactants and products are represented by the coefficients in a balanced chemical equation. Hence, the total mole ratio for the indicated reaction is:

2 moles of IrCl3 : 3 moles of NaOH : 1 mole of Ir2O3 : 3 moles of HCl : 3 moles of NaCl

This can also be expressed in simpler terms as:

2:3:1:3:3

As a result, 3 moles of NaOH are needed to completely react with every 2 moles of IrCl3. 3 moles of HCl, 3 moles of NaCl, and 1 mole of Ir2O3 are the end products.

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When a strong acid and weak base are combined, the salt that will form is ammonium chloride (NH4Cl). Ammonium chloride (NH4Cl) is a salt that is formed when a strong acid (HCl) is combined with a weak base (NH3).

The reaction between hydrochloric acid (HCl) and ammonia (NH3) can be expressed as follows:HCl + NH3 → NH4ClThe reaction is an acid-base neutralization reaction, where the acid (HCl) donates a proton (H+) to the base (NH3) to form a salt (NH4Cl).In this reaction, hydrochloric acid (HCl) is a strong acid and ammonia (NH3) is a weak base. Therefore, the resulting salt, ammonium chloride (NH4Cl), is a salt that is formed when a strong acid and weak base are combined.In contrast, NaCl is formed when a strong acid (HCl) is combined with a strong base (NaOH). AICI3 is a salt that is formed when aluminum (Al) reacts with hydrochloric acid (HCl). H20, or water, is not a salt; it is a covalent compound.

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The structures of the initially formed tautomers in the reaction of propyne and dicyclohexylethyne with dicyclohexylborane followed by NaOH and H2O2 is (E)-prop-1-en-1-ol and (E)-1,2-dicyclohexylethen-1-ol respectively

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Answer:

I think is c

Explanation:

I hope this helps you

Answer:

Acid solutions and base solutions

Explanation:

Answer:

measure in cups or fluid ounces

Explanation:

Answer:

Liters

Explanation:

Trust me

Answer:

a

Explanation:

The heat capacity of a substance is the heat energy required to rise its temperature per one degree Celsius. Hence its unit is J/°C.

Heat capacity is the amount of heat energy required to raise the temperature of a substance by 1 degree Celsius or 1 Kelvin. It is expressed in the following units:

Joules per degree Celsius (J/°C)

Joules per Kelvin (J/K)

Calories per degree Celsius (cal/°C)

Calories per Kelvin (cal/K)

Joules per gram per degree Celsius (J/(g·°C))

Joules per gram per Kelvin (J/(g·K)) etc.

If in terms of simply the energy, then, The following units are used.

Joules (J) , Calories (cal) , Degrees Celsius (°C), Kelvin (K)

The choice of unit depends on the specific application and the system of units being used. The SI unit for heat capacity is J/K, while the traditional unit is cal/°C.

The use of per gram units is common in the context of specific heat capacity, which is the amount of heat energy required to raise the temperature of a unit mass of a substance by 1 degree Celsius or 1 Kelvin.

Therefore, here, the unit of heat capacity is J/°C.

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The gas with the lowest average velocity is Xe (xenon).

According to the kinetic theory of gases, the average velocity of gas particles is inversely proportional to the square root of their molar mass.

Xenon (Xe) has the highest molar mass among the three gases, followed by nitrogen (N₂), and carbon disulfide (CS₂) has the lowest molar mass.

Since the average velocity is inversely proportional to the square root of the molar mass, the gas with the highest molar mass (Xe) will have the lowest average velocity, while the gas with the lowest molar mass (CS₂) will have the highest average velocity.

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Answer: it is red

Explanation: it is getting hotter

The pH of a 0.25 M solution of NaNO2= 6.65.

Given the concentration of NaNO2, we can find the concentration of NaOH and HNO2 as follows:

NaNO2 = 0.25 MNaOH = HNO2 = x

(since they have equal concentrations due to the stoichiometry of the reaction)

Thus, we can write the equilibrium constant expression as:

Ka = x^2/0.25

Now, let's solve for x:

x^2 = 0.25 x 4.5 x 10^-4x = √(0.25 x 4.5 x 10^-4) = 0.015

This value represents the concentration of both HNO2 and NaOH. Since we are interested in pH, we need to find the concentration of H+ ions using the following equation:

Kw = [H+][OH-]

Since we have found the concentration of OH- (which is the same as the concentration of NaOH),

we can solve for H+:

Kw = 1.0 x 10^-14[H+][0.015] = 1.0 x 10^-14[H+] = 6.7 x 10^-13

Finally, we can find pH:

pH = -log[H+]pH = -log(6.7 x 10^-13)pH = 6.65

Therefore, the correct option is d) pH = 6.65.

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Answer:

The number of electrons in the outermost shell of an atom determines its reactivity. Noble gases have low reactivity because they have full electron shells. Halogens are highly reactive because they readily gain an electron to fill their outermost shell

Explanation:

does that help

Answer:

as molecular mass increases, more molecules have speeds close to their average speed.

Explanation:

A plot of the Maxwell distribution of velocities for several different gases measured at the same temperature shows that "as molecular mass increases, more molecules have speeds close to their average speed."

This is evident in the fact that the Maxwell distribution of speeds for a given selection of gas at a given temperature shows certain traits if one of the main variables is changed, such as

1. Mass: The proportion of speeds for a given selection of gas is narrower and the average speed is lower for gas of higher molecular weight.

2. Temperature: The proportion of speeds for a given selection of gas is wider and the average speed is higher as the temperature of a gas increases.

The volume of the solution is 0.01216 L

What is  volume of a solution ?

A three-dimensional space's occupied volume is measured.  It is frequently measured numerically with SI-derived units (such the cubic meter and litre) or with other imperial units (such as the gallon, quart, cubic inch). Volume and length are related in how they are defined (cubed). The volume of a container is typically thought of as its capacity, or the amount of fluid (gas or liquid) that it could hold, as opposed to the amount of space the container occupies.

Given ,

molarity (M )= 0.400 M

Number of mole  ( n)= 0.0304 mol

Volume (V)=nM

V = 0.400 * 0.0304

V = 0.01216 L

Hence, volume of solution is 0.01216 L

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The correct IUPAC name for the compound is e) 1,1-dimethyl-4-heptanone.

In the IUPAC naming system, we prioritize the functional group, which in this case is a ketone (a carbonyl group attached to two alkyl groups). We start by numbering the longest carbon chain, which in this case is the heptane chain (7 carbons). We number the carbons so that the ketone group has the lowest possible number, which is carbon 4 in this case.

Next, we identify and name the substituents attached to the main chain. The methyl groups on carbons 1 and 1 are both considered substituents. Since they are the same, we use the prefix "dimethyl" to indicate two methyl groups.

Putting it all together, we get the name "1,1-dimethyl-4-heptanone". This name accurately describes the compound's structure and follows the rules of IUPAC nomenclature.

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At pH 5, the hypochlorous fraction is 0.00029. At pH 9, the hypochlorous fraction is 0.48. At pH 11, the hypochlorous fraction is 0.999.

The best pH for having the highest disinfection is pH 11, since it has the highest hypochlorous fraction. At higher pH values, the hydrogen ion concentration is lower and there is a higher concentration of HOCl, which is a better disinfectant.

Hypochlorous acid (IUPAC name chloro (I) acid) is a weak acid with the chemical formula HClO. It is produced when chlorine dissolves in water. It cannot be isolated in pure form due to rapid equilibration with the precursor. HClO is used as a bleach, oxidizer, deodorant, and disinfectant.

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Explanation:

The polarity of a bond is given by the difference in electronegativity between the two atoms that form said bond.

Coulomb's law explains the interaction between charged particles and is applicable to the ionic bond in potassium bromide (KBr) and the polar covalent bond in acetaldehyde (CH3CHO).

In KBr, the potassium (K) atom donates an electron to the bromine (Br) atom, forming an ionic bond. This results in the formation of K+ cations and Br- anions. These charged particles are held together by electrostatic attraction according to Coulomb's law. The magnitude of the force of attraction between the ions is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

On the other hand, acetaldehyde (CH3CHO) has a polar covalent bond. The oxygen (O) atom is more electronegative than the carbon (C) atom, causing a partial negative charge on the oxygen atom and partial positive charges on the carbon and hydrogen atoms. The bonding electrons are pulled closer to the oxygen atom, resulting in a partial positive charge on the hydrogen atoms.

Now, let's consider the melting points:

1. KBr: The ionic bond between K+ and Br- ions involves strong electrostatic attraction. The positive and negative charges are tightly held together, requiring a significant amount of energy to break these bonds and convert the solid into a liquid. Hence, KBr has a relatively high melting point.

2. CH3CHO: In acetaldehyde, the intermolecular forces are primarily dipole-dipole interactions. The partial positive charges on the hydrogen atoms of one molecule attract the partial negative charges on the oxygen atom of another molecule. These intermolecular forces are weaker compared to the ionic bonds in KBr. Consequently, less energy is required to overcome these forces and convert acetaldehyde into a liquid. Thus, CH3CHO has a lower melting point compared to KBr.

In summary, the higher melting point of KBr compared to CH3CHO is due to the stronger ionic bonds formed between the K+ and Br- ions, resulting in stronger electrostatic attractions according to Coulomb's law.

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Answer: Sea Level

Explanation: facts