Using the periodic table to locate each element, write the electron configuration of(c) Ag.

Answer:

10,148

Explanation:

To solve this we must be knowing each and every concept related to Enthalpy. Therefore, 10,148KJ/mol is the ΔH for formation for the reaction 16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances. Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance.

The balanced equation for the given chemical reaction can be given as

16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

ΔH for formation= 10,148KJ/mol

Therefore, 10,148KJ/mol is the ΔH for formation for the reaction 16CO\(_2\)(g) + 18H\(_2\)O(g) \(\rightarrow\) 2C\(_8\)H\(_{18}\)(l) + 25O\(_2\)(g)

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The chemical formula of the ionic compound is XY₂.

During the formation of the ionic compound between an ion X that has a charge of 2+ and ion Y has a charge of 1-, two negatively charged ions of Y are required to form a neutral ionic ionic compound when they react with X.

The chemical the formula of the ionic compound they form is as follows;

X²⁺  + 2Y⁻ ---> XY₂

Therefore, the chemical formula of the ionic compound is XY₂.

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#you can see the formula in pic for more detail writting

Mg2+ + Cl- -> MgCl2

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The temperature in degrees Celsius that the reaction will go twice as fast is  32.4 ⁰C.

ln(k₂/k₁) = E/R(1/T₁ - 1/T₂)

where;

when rate is twice faster, k₂ = 2k₁ = 2(0.011) s⁻¹ = 0.022 s⁻¹

ln(0.022/0.011) = (45,500/8.31)(1/294 - 1/T₂)

0.693 = 5475.33(1/294 - 1/T₂)

1.2657 x 10⁻⁴ = 1/294 - 1/T₂

1/T₂ = 1/294 - 1.2657 x 10⁻⁴

1/T₂ = 3.275 x 10⁻³

T₂ = 305.4 K = 32.4 ⁰C

Thus, the temperature in degrees Celsius that the reaction will go twice as fast is  32.4 ⁰C.

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Answer:

oil floats on water because it is heavier than water

Salt is no longer visible after stirring as salt dissolves in water

by filtration

Using Hess's law, δG°rxn for the reaction ClO(g) + O3(g) → Cl(g) + 2 O2(g) is 524.1 kJ.

What is Hess's law?

Germain Hess, a Swiss-born Russian scientist, and physician who published it in 1840, is honored by having a relationship in physical chemistry named after him. This connection is known as Hess' law, Hess' law of constant heat summation, or simply Hess' law.

Determining δg°rxn:

To use Hess's Law to calculate δG°rxn for the reaction: ClO(g) + O3(g) → Cl(g) + 2 O2(g), we can follow these steps:

Step 1: Write down the given reactions and their respective δG°rxn values:
Reaction 1: 2 O3(g) → 3 O2(g); δG°rxn1 = 489.6 kJ
Reaction 2: Cl(g) + O3(g) → ClO(g) + O2(g); δG°rxn2 = -34.5 kJ

Step 2: Manipulate the given reactions to match the target reaction:
We need to reverse Reaction 2:
ClO(g) + O2(g) → Cl(g) + O3(g); δG°rxn2_reversed = 34.5 kJ

Step 3: Add the manipulated reactions to form the target reaction:
Reaction 1: 2 O3(g) → 3 O2(g); δG°rxn1 = 489.6 kJ
Reaction 2_reversed: ClO(g) + O2(g) → Cl(g) + O3(g); δG°rxn2_reversed = 34.5 kJ

Target Reaction: ClO(g) + O3(g) → Cl(g) + 2 O2(g)

Step 4: Add the respective δG°rxn values to find the δG°rxn for the target reaction:
δG°rxn_target = δG°rxn1 + δG°rxn2_reversed = 489.6 kJ + 34.5 kJ = 524.1 kJ

So, the δG°rxn for the reaction ClO(g) + O3(g) → Cl(g) + 2 O2(g) is 524.1 kJ.

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Answer: The four most abundant elements in the human body – hydrogen, oxygen, carbon and nitrogen – account for more than 99 per cent of the atoms inside you. They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA and carbohydrates.

Explanation:

Answer:

A. a wild dog that finds and mates with a domestic dog.

Explanation:

Answer:

C2H3O

Explanation:

Use mass to find percentage composition

Find empical formula

Svante Arrhenius theory suggests that in order for a substance to release either H+ or OH- ions, it must contain that particular ion. However, this does not explain the weak base ammonia (NH3), In Bronsted-Lowry acid-base theory, acids are defined as proton donors; whereas bases are defined as proton acceptors.

With the chemical formula NH3, ammonia is a nitrogen and hydrogen inorganic compound. Ammonia is a colorless gas with a strong, pungent odor.

It is a stable binary hydride and the most basic pnictogen hydride. In terms of biology, it is a typical nitrogenous waste, especially among aquatic organisms, and it significantly contributes to the nutritional requirements of terrestrial organisms by acting as a precursor to 45 percent of the world's food and fertilizers.

Approximately 70% of ammonia is used to create fertilizers, including urea and diammonium phosphate, in a variety of shapes and compositions. Additionally, pure ammonia is sprayed onto the ground.

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Avogadro's number

1 mole = 6.02.10²³ particles (atoms, molecules, ions)

\(\tt 1.87\times 10^{24}\div 6.02\times 10^{23}=\boxed{\bold{3.11~moles}}\)

One mole of copper contains 6.02 × 10²³ copper atoms. Therefore, the number of moles that contains 1.87 ×10²⁴ copper atoms is 3.1 moles.

The number of atoms that constitutes one mole of a substance is called Avogadro number. It is equal to  6.02 × 10²³. Thus, one mole of every elements contains Avogadro number of atoms.

Similarly, one mole of a compound contains  6.02 × 10²³ number of molecules. Thus, one mole of carbon dioxide contains these much molecules.

Given the number of atoms of copper = 1.87 ×10²⁴

Then, no.of moles = number of atoms/ Avogadro number.

no.of moles =1.87 ×10²⁴ /6.022 × 10²³  = 3.1 moles.

Therefore, the number of moles of copper that contains 1.87 ×10²⁴ atoms is 3.1

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Humidity refers to the amount of water vapor in the air accurately describes it.

This can be defined as the gaseous phase of water as a result of heating in the atmosphere.

The amount of the water vapor in air is what is referred to as humidity which makes option D the most appropriate choice.

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Answer:

Chlorine

Explanation:

Each arrow represents one electron. Most of the boxes are filled, meaning they have two electrons. The last box only has one arrow, so it only has one electron. If you add it up, you get 17, which is Chlorine.

There are 1103.014 grams in 8.100 g-mol of calcium sulfate.

To calculate the grams in 8.100 g-mol of calcium sulfate, we need to determine the molar mass of calcium sulfate (CaSO₄) first. The molar mass is calculated by adding up the atomic masses of each element in the compound.

Calcium (Ca) has an atomic mass of 40.08 g/mol, sulfur (S) has an atomic mass of 32.07 g/mol, and oxygen (O) has an atomic mass of 16.00 g/mol.

The molar mass of calcium sulfate (CaSO₄) is therefore calculated as:
(1 * 40.08) + (1 * 32.07) + (4 * 16.00) = 136.14 g/mol.

Now we can calculate the grams in 8.100 g-mol of calcium sulfate using the following formula:
grams = molar mass * moles.

Plugging in the values:

grams = 136.14 g/mol * 8.100 g-mol = 1103.014 g.

Therefore, there are 1103.014 grams in 8.100 g-mol of calcium sulfate.

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Answer:

3.56x10²³ atoms

Explanation:

To solve this question we need first to determine the moles of iron (II) chloride, FeCl₂, using its molar mass. Then, using Avogadro's number we can solve for the number of atoms:

Moles FeCl₂ - Molar mass: 126.751g/mol-

25g FeCl₂ * (1mol / 126.751g) = 0.1972 moles

Number of atoms:

1 mole of FeCl₂ are 6.022x10²³ molecules of FeCl₂, that means 0.1972moles are:

0.1972mol * (6.022x10²³ molecules / 1mol) = 1.188x10²³ molecules of FeCl₂

In 1 molecule of FeCl₂ there are 3 atoms (1 of Fe and 2 of Cl), in 1.188x10²³ molecules of FeCl₂ there are:

1.188x10²³ molecules of FeCl₂ * (3atoms / molecule) =

As a system reaches thermal equilibrium, heat has been transferred from areas of high to low temperature.

In other words, when a system reaches thermal equilibrium, there is no longer a temperature difference between its different parts, and the heat has been evenly distributed throughout the system. This can happen through a variety of mechanisms, such as conduction, convection, and radiation, and the specific mechanism will depend on the properties of the system and the materials it is made of. Once thermal equilibrium has been reached, the system will remain at a constant temperature until something changes, such as the addition or removal of heat or a change in the materials or structure of the system.

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If reddish stains appear on plumbing fixtures, it is likely that the water contains an elevated concentration of iron. Iron is a common mineral found in the Earth's crust, and it can dissolve in water sources, especially if the water is acidic or has low oxygen content.

When the iron-containing water comes into contact with the plumbing fixtures, the iron compounds undergo oxidation reactions, leading to the formation of reddish-brown stains. Iron staining is a common issue in households with well water or older plumbing systems. The presence of iron in water not only affects the appearance of fixtures but can also result in metallic tastes and odors in drinking water. Furthermore, iron deposits can accumulate in pipes, reducing water flow and potentially causing plumbing problems.

To address iron staining, water treatment methods such as oxidation, filtration, or sequestration can be employed. These techniques aim to remove or prevent the formation of iron compounds, improving the quality and aesthetics of the water. Regular maintenance of plumbing systems and periodic testing of water quality can help identify and address iron-related issues effectively.

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The atomic radius of the atoms in the face-centered cubic unit cell is 2.79 × 10⁻⁸ cm. The volume of the unit cell is given, and we know that it is a face-centered cubic unit cell, which has 4 atoms. Using the formula for the volume of a sphere, we can rearrange it to solve for the atomic radius.

To calculate the atomic radius of the atoms in the face-centered cubic unit cell, we need to use the following formula:
Volume of unit cell = (4/3) x π x (atomic radius)³ x number of atoms

In a face-centered cubic unit cell, there are 4 atoms. Therefore, we can rearrange the formula to solve for the atomic radius:
Atomic radius =\([(3 * Volume of unit cell) / (4 * \pi * number of atoms)]^{1/3}\)

Substituting the given values, we get:
Atomic radius = \([(3 * 9.32 * 10^{-23} cm^{3} ) / (4 *\pi * 4)]^{1/3}\)
Atomic radius = 2.79 × 10⁻⁸ cm

Therefore, the atomic radius of the atoms in the face-centered cubic unit cell is 2.79 × 10⁻⁸cm.

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Answer:

A

Explanation:

A reaction with a negative ΔH and a positive ΔS is spontaneous at high temperatures.

When considering the enthalpy change (ΔH) and entropy change (ΔS) of a reaction, their signs provide insights into the spontaneity of the reaction.

A negative ΔH indicates an exothermic reaction, releasing energy to the surroundings. A positive ΔS suggests an increase in the disorder or randomness of the system.

In the given scenario, where the reaction has a negative ΔH and a positive ΔS, the reaction is spontaneous at high temperatures.

This means that at elevated temperatures, the reaction will proceed in the forward direction without requiring an external input of energy.

The increase in disorder (positive ΔS) overcomes the decrease in energy (negative ΔH), driving the reaction forward.

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By first vaporising the component and then condensing the vapour back into a liquid form, distillation purifies a compound.

The fundamental idea underpinning distillation is that different liquid mixtures may be distinguished by the difference in their boiling points. When a liquid's vapour pressure reaches atmospheric pressure, that temperature is known as the boiling point. This technique divides liquids into volatile and non-volatile categories.

It is then boiled after being placed in the RB flask. The more volatile or lower boiling point component evaporates more quickly and is collected in a different container. Condensation is accelerated with the aid of a condenser.

For instance, distillation can be used to separate a chloroform and aniline mixture. Aniline has a boiling point of 189°C while chloroform has a boiling point of 60°C. Thus, a mixture of chloroform and aniline can be separated by distillation.

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The stroke volume in the next few cardiac cycles will be 100 ml if the end-diastolic volume is increased from 135ml to 165m.

The formula for stroke volume is given as;

SV = EDV - ESV

Here SV represents stroke volume, EDV represents end-diastolic volume and ESV represents end-systolic volume.

First, we calculate this person's end-systolic volume as follows;

If the person’s stroke volume was 70ml and his initial diastolic volume was 135 ml, then:

70 = 135 - ESV

70 - 135 = -ESV

-65 = -ESV

ESV = 65ml

Now the stroke volume in the next few cycles if the end-diastolic volume increase to 165 ml can be calculated as follows;

SV = 165 - 65

SV = 100ml

Therefore, the stroke volume in the next few cardiac cycles is calculated to be 100ml.

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The diameter is given 20 Armstrong and length of the DNA molecule is 24 micrometer. Then, the axial ratio of the DNA molecule is 12000.

DNA is the genetic material in all living bodies. It is inheriting from the parents to the offsprings. DNA is located inside the cell nuclei. Chromosomes are the genetic materials which contain DNA molecules.

A DNA molecule is a polynucleotide with sugar units and phosphate groups attached. The DNA segments are of different size and all are having double helical structure.

Given the diameter of the DNA sample = 20 Armstrong = 20 × 10⁻¹⁰ m.

length = 24 micrometer = 24 × 10⁻⁶ m

axial ratio  = length/diameter

                 =   24 × 10⁻⁶ m/ 20 × 10⁻¹⁰ m

                 = 12000.

Therefore, the axial ratio of the DNA molecule is 12000.

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(a) In the reaction CaCO3 → CaO + CO2, the hybridization of the underlined C atom in CO3 changes from sp2 to sp (in CO2).
(b) In the reaction BF3 + NaF → NaBF4, the hybridization of the underlined B atom remains the same, sp2.
(c) In the reaction PCl3 + Cl2 → PCl5, the hybridization of the underlined P atom changes from sp3 to sp3d (from PCl3 to PCl5).
(d) In the reaction HC≡CH2 + H2 → H2C=CH2, the hybridization of the underlined C atoms changes from sp to sp2.
(e) In the reaction SiF4 + 2F- → SiF6^2-, the hybridization of the underlined Si atom changes from sp3 to sp3d2.

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Answer:

false

Explanation:

use the rapid quark for a explain

Answer:

VII'th group, negative ion

Explanation:

Usually fluorine is located in the seventh(VII) group as fluorine has 7 electrons in it's outer shell with chemical symbol "F"
Fluorine has 7 electrons in it's outer shell therefore, it needs one more electron to get the noble gas configuration. So more electrons means negative ion.

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In the below given ways we can give 3 laws and 3 goals that can make a better community. Law is a system of rules formed and enforced by social or political organizations.

Law is a system of rules formed and enforced by social or political organizations to regulate conduct, the precise definition of which has long been debated. It has been regarded as a science as well as an art form.

3 laws and 3 goals that can make a better community are:

When enforcing community rules, be fair.

Keep an eye out for anonymous complaints.

Keep community rules as well as terminology as minimal as possible.

Therefore, in the above given ways we can give 3 laws and 3 goals that can make a better community.

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Answer:

A and B is the answer

Answer:

option b

Explanation:

Answer:

Physical Chanhe is the answer : )