Henry divides 1,060 g by 1.0 ml to find the density of his water sample. How many significant figures should be included in the density value that he reports?

Answer:

1. Born Haber cycle is used to calculate enthalpy of formation of an ionic solid

2. Resonance structures are used to represent the bonding in some chemical species.

Explanation:

The Born–Haber cycle is a method popularly known in chemistry used in computing enthalpy. The enthalpy of formation of an ionic solid cannot be measured directly. The lattice enthalpy refers to the enthalpy change involved in the formation of an ionic compound from gaseous ions the process is exothermic process. A Born–Haber cycle works on the principle of Hess's law. It can be used to calculate the lattice enthalpy by comparing the standard enthalpy change of formation of the ionic compound from the elements to the enthalpy required to make gaseous ions from the elements.

Resonance is an idea introduced by Linus Pauling to explain chemical bonding from the valence bond perspective. The idea of resonance affords us the opportunity to describe the bonding in certain molecules by combining several structures called chemical or canonical structures. The real structure of the specie lie somewhere between the structures indicated by the resonance structures. The resonance structures of the nitrate ion are shown in the image attached.

Hi there!

\(\large\boxed{4.04g}\)

To solve, we can use dimensional analysis to convert from molecules to grams.

We must use Avogadro's number (6.02 × 10²³) in converting from molecules to moles.

After converting, multiply by the atomic mass, or grams per mole.

\(1.204 * 10^{24} moles *\frac{1 mol}{6.02*10^{23}moles}* \frac{2.02g}{1mol }= 4.04g\)

Answer:

The bond order between carbon and oxygen in carbon dioxide (CO2) is two.

The Lewis structure of CO2 shows that each of the two double bonds (C=O) consists of one sigma bond and one pi bond. The bond order is the number of electron pairs being shared by a pair of atoms in a molecule, divided by the number of chemical bonds between the same pair of atoms. In CO2, there are two double bonds between carbon and oxygen, and each double bond has a bond order of 2. Therefore, the overall bond order between carbon and oxygen in CO2 is 2.

The absolute temperature of the gas is 325 K.

To determine the absolute temperature of the gas, we need to convert the given temperature from Celsius to Kelvin. The Kelvin scale is an absolute temperature scale where 0 K represents absolute zero, which is the lowest possible temperature.

To convert from Celsius to Kelvin, add 273.15 to the Celsius value. In this case, the given temperature is 52°C. So, to convert it to Kelvin, we perform the following calculation:

Temperature in Kelvin = 52°C + 273.15 = 325.15 K

Therefore, the absolute temperature of the gas is 325.15 K.

It's important to note that the Kelvin scale is used in scientific calculations involving temperature because it directly corresponds to the average kinetic energy of particles in a substance. Absolute zero on the Kelvin scale (0 K) represents the complete absence of molecular motion. The Kelvin scale is particularly useful in gas laws and other thermodynamic calculations as it provides a meaningful reference point.

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The mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur .

The molecular formula of Aluminum Sulfate is \(Al_2(SO_4)_3.\) In one molecule of aluminum sulfate, there are 3 sulfur atoms. To calculate the mass of aluminum sulfate, follow the steps below:

Step 1: Calculate the molar mass of aluminum sulfate using the periodic table.Al = 27.0 g/molS = 32.1 g/molO = 16.0 g/mol

(2 × Al) + (3 × S) + (12 × O) = molar mass of \(Al_2(SO_4)_3.\) = 342.2 g/mol

Step 2: Find the number of moles of sulfur in the given number of atoms of sulfur.2\(2.837*10^{26\) atoms of sulfur × 1 mol S/\(6.022 * 10^{23\)atoms S = 0.0470 mol S

Step 3: Use the molar ratio of sulfur to aluminum sulfate to calculate the number of moles of aluminum sulfate.1 mol \(Al_2(SO_4)_3.\) / 3 mol S = 0.333 mol\(Al_2(SO_4)_3.\) per mol S0.0470 mol S × 0.333 mol \(Al_2(SO_4)_3.\)/mol S = 0.0157 mol \(Al_2(SO_4)_3.\)

Step 4: Calculate the mass of aluminum sulfate.0.0157 mol \(Al_2(SO_4)_3.\) × 342.2 g/mol\(Al_2(SO_4)_3.\)= 5.373 g\(Al_2(SO_4)_3.\)

Therefore, the mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur.

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Answer:

Hydrogen + carbon - hydrochloride

The concentration of the acid is \(0.25 M\).

Titration is a laboratory technique used to determine the concentration of a substance in a solution by reacting it with a standardized solution of known concentration.

The titration formula can be given by,

(Volume of the Base) \(\times\) (Normality of the Base) = (Volume of the Acid) \(\times\) (Normality of the Acid)

\(\Rightarrow V_1N_1=V_2N_2\)

Given, the volume of the base (\(NaOH\)), \(V_1 =25 ml\).

The concentration of the base (\(NaOH\)), \(M_1=0.5 M\).

The equivalence of the base (\(NaOH\)) is \(1\).

Hence, the normality of the base (\(NaOH\)), \(N_1=\frac{0.5}{1}N=0.5N\).

Given, the volume of the acid (\(HCl\)), \(V_2 =50 ml\).

Let us assume that the normality of the acid (\(HCl\)) \(N_2\).

Substitute the values in the given formula of titration.

\((25\times0.5)=(50 \times N_2)\\\Rightarrow 12.5=50N_2\\\Rightarrow N_2=\frac{12.5}{50} N\\\Rightarrow N_2=0.25 N\)

Hence, the normality of the acid (\(HCl\)), \(N_2=0.25 N\).

The equivalence of the acid (\(HCl\)) is \(1\).

Therefore, the concentration of the acid, \(M_1=\frac{0.25}{1}=0.25 M\).

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The molality of the isopropyl alcohol in the solution is 13.95 m

Mole = mass / molar mass

Mole of isopropyl alcohol = 45.6 / 60.11

Mole of isopropyl alcohol = 0.759 mole

Molality = mole / mass of solvent

Molality = 0.759 / 0.0544

Molality = 13.95 m

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The chemical name for the compound CH3CH₂CH₂CH3 is butane.

Alkanes are any acyclic saturated hydrocarbon with a carbon to carbon single bond e.g. methane, ethane etc.

Alkanes have a general molecular formula of CnH2n+2. The number of carbon atoms determines the name of the alkane member.

According to this question, a chemical compound with the molecular formula; CH3CH₂CH₂CH3 is given. This compound posseses 4 carbon atoms and 10 hydrogen atoms, hence, is butane.

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The equation that can be said to show incomplete combustion is option A

Unburned carbon particles and carbon monoxide (CO), as well as water vapor and other byproducts, are examples of incomplete combustion products that are produced when a fuel does not completely react with the oxygen that is present during the combustion process.

Complete combustion occurs when a fuel combines with oxygen in the presence of enough heat to produce the primary byproducts of carbon dioxide, water, and heat.

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Answer:

The answer is 87.5

The result of the computation when you follow the steps is 1.699.

A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"

What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.

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its true

Potential energy is the stored or latent energy in an object at rest. It’s fundamental to many physics-related concepts because its laws hold true on any level, from the planetary to the atomic level. The potential energy of an object is measurable.

Answer:

Molecules in the skin are moving faster than molecules in the glass.

Explanation:

Put it in your own words.

Answer:

The energy from the ice transferred to the glass.

Answer:

a) Q₁ = 58.82 KJ

b) Q₂ = 42.48 KJ

c) Q₃ = 29.22 KJ

d) Q = 130.52 KJ  

Explanation:

a)

In order to find the energy absorbed to heat the solid, we will use:

\(Q_{1} = mC_{1}\Delta T_{1}\)

where,

Q₁ = Heat absorbed for heating solid = ?

m = mass of solid = 488.3 g = 0.4883 kg

C₁ = Specific Heat Capacity of Solid = 2.96 J/g °C

ΔT₁ =  Change in temperature of Solid = Melting Temperature - Initial Temp.

ΔT₁ = 17.6°C - (-23.1°C) = 40.7°C

Therefore,

\(Q_{1} = (488.3\ g)(2.96\ J/g\ ^{0}C)(40.7\ ^{0}C)\)

Q₁ = 58.82 KJ

b)

In order to find the absorbed to melt the solid at 17.6°C, we will use:

\(Q_{2} = nH_{fus}\)

where,

Q₂ = Heat absorbed for melting solid = ?

H_fus = Heat of Fusion = 8.04 KJ/mol

n = no. of moles = \(\frac{m}{MM} = \frac{488.3\ g}{92.41\ g/mol} = 5.28 mol\)

Therefore,

\(Q_{2} = (5.28\ mol)(8.04\ KJ/mol)\)

Q₂ = 42.48 KJ

c)

In order to find the energy absorbed to heat the liquid, we will use:

\(Q_{3} = m C_{3}\Delta T_{3}\)

where,

Q₃ = Heat absorbed for heating Liquid = ?

m = mass of solid = 488.3 g = 0.4883 kg

C₃ = Specific Heat Capacity of Liquid = 1.75 J/g °C

ΔT₃ =  Change in temperature of Liquid = Final Temp. - Melting Temp.

ΔT₃ = 51.8°C - 17.6°C = 34.2°C

Therefore,

\(Q_{3} = (488.3\ g)(1.75\ J/g\ ^{0}C)(34.2\ ^{0}C)\)

Q₃ = 29.22 KJ

d)

Total amount of energy absorbed during entire process is:

\(Q = Q_{1} + Q_{2} + Q_{3}\)

\(Q = 58.82\ KJ + 42.48\ KJ + 29.22\ KJ\)

Q = 130.52 KJ

In order to heat a 488.3 g solid, 58.8 kJ are required. To melt the solid, 42.5 kJ are required. To heat the liquid, 29.2 kJ are required. The total amount of energy absorbed is 130.5 kJ.

Initially, a 488.3 g solid at -23.1 °C is heated up to 17.6 °C (melting point). We can calculate the heat required (Q₁) using the following expression.

\(Q_1 = c \times m \times \Delta T = \frac{2.96J}{g.\° C } \times 488.3g \times (17.6\° C-(-23.1\° C)) \times \frac{1kJ}{1000J} = 58.8 kJ\)

where,

At 17.6 °C, we can calculate the heat (Q₂) required to melt the solid using the following expression.

\(Q_2 = \Delta H_{fus} \times \frac{m}{MM} = 8.04 kJ/mol \times \frac{488.3 g}{92.41g/mol} = 42.5kJ\)

where,

The liquid is heated from 17.6 °C to 51.8 °C. We can calculate the heat required (Q₃) using the following expression.

\(Q_3 = c \times m \times \Delta T = \frac{1.75J}{g.\° C } \times 488.3g \times (51.8\° C-17.6\° C)) \times \frac{1kJ}{1000J} = 29.2 kJ\)

The total amount of energy absorbed (Q) is the sum of the energy absorbed in each step.

\(Q = Q_1 + Q_2 + Q_3 = 58.8kJ+42.5kJ+29.2kJ= 130.5kJ\)

In order to heat a 488.3 g solid, 58.8 kJ are required. To melt the solid, 42.5 kJ are required. To heat the liquid, 29.2 kJ are required. The total amount of energy absorbed is 130.5 kJ.

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Miscible liquids are separated via a kind of distillation called fractional distillation. he mixture is typically divided into component parts after a series of distillations and condensations.

Miscible liquids are separated via a kind of distillation called fractional distillation. The mixture is typically divided into component parts after a series of distillations and condensations. When the combination is heated to a specific temperature where some of the mixture begins to vaporise, the separation takes place.

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Approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

The relationship between the initial and final concentrations and volumes must be taken into account.

Given: Initial concentration \((C^1) = 1 M Initial volume (V^1) = 250 mL\)

\((C^2) = 3 M final concentration\)

We can use the equation:

\(C^1 * V^1 = C^2 * V^2\)

Where:

\(V^2\)is the final volume of the solution

Rearranging the equation to solve for V2:

\(V^2 = (C^1 * V^1) / C^2\)

Substituting the given values:

\(V^2 = (1 M * 250 mL) / 3 M\)

\(V^2 = 250 mL / 3\)

\(V^2\) ≈ \(83.33 mL\)

To find the amount of water that needs to be evaporated, we subtract the final volume from the initial volume:

Amount of water to be evaporated = \(V^1 - V^2\)

Amount of water to be evaporated = 250 mL - 83.33 mL

Amount of water to be evaporated ≈ 166.67 mL

Therefore, approximately 166.67 mL of water needs to be evaporated from 250 mL of 1 M Ca(OH)2 to make it 3 M.

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According to Boyle's law, the pressure in the acetylene tank is 268.33 atmospheres.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

In the given problem , by substituting values in formula P₁V₁=P₂V₂, P₂=115×7/3=268.33 atmospheres.

Hence, the pressure in acetylene tank is 268.33 atmospheres.

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its correct

Answer:

In physics, motion means a continuous change in the position of a body relative to a reference point, as measured by a particular observer in a particular frame of reference.

Explanation:

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

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The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

Zn (s) + 2 HCl (aq) --→ ZnCl2 (aq) + H2 (g) Zn being oxidized during the reaction: Correct answer is 1. oxidized. Zn's oxidation status is shifting from 0 to +2.

A chemical process called oxidation occurs. As a result of atoms or groups of atoms losing electrons, it is described as a process. The addition or loss of oxygen or hydrogen in a chemical species is another method to define oxidation. An oxidation reaction takes place when oxygen interacts with a substance or an element. Another way to think of oxidation is as the process of removing hydrogen from the species of reactants. Molecule, atom, or ion oxidation is the process of losing electrons. Initially, reactions where an element interacts with oxygen were referred to as oxidations. For instance, the chemical interaction between magnesium metal and oxygen to produce magnesium oxide is the oxidation of magnesium.

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Asteroids in the main asteroid belt at certain distances from the Sun are in an orbital resonance with Jupiter, the period of a belt asteroid in an 11:5 orbital resonance with Jupiter is mathematically given as

TA=5.4090years

Generally, the equation for the ratio is mathematically given as

asteroid in an 11:5 orbital resonance= 11/5

Therefore, with Jupiter at

TJ=11.9years

Hence

11/4=TJ/TA

TA=5/11)*11.9

TA=5.4090years

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Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

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The balanced chemical equation for the reaction is: H2SO4 + 2KOH → K2SO4 + 2H2O. It can be concluded that the basicity of tetraoxosulphate VI acid is 2.

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Answer:

o temperature increases

Answer:

Overall reaction equation is:

Cl2(g) + CHCl3(g) --> HCl(g) + CCl4(g)

The intermediates are Cl(g), CCl3(g).

Rate law= ka^1/2 c

Explanation:

This reaction is a non elementary reaction. A non elementary reaction is one that does not take place in a single reactive encounter. In other words, the reaction is comprised of many steps.

The overall reaction equation is the sum of all the reaction steps after all intermediates have been cancelled out. The rate law is obtained from the slowest step in the reaction sequence.

A major purchase refers to a high-cost item or service that is considered a significant investment for an individual or household, such as a car, home, or college education. Major purchases usually involve a large sum of money and require careful planning and consideration before a final decision is made.

Any item that a person or a household buys for their own use or consumption is called a consumer good. Durable and non-durable goods are two types of consumer goods that can be classified. Consumer goods are tangible items that people or households buy for their own use or consumption.

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Your question is incomplete, most probably the complete question is:

The difference between Major purchase and Consumer good​?