Write balanced equations for the formation of the following compounds from their elements:a) ethanol(C2H6O)b) sodium sulfatec) dichloromethane (CH2Cl2

6.73 m is the  height h; the bottle be placed so the liquid pressure is 66 mm - hg

P=ρgh

P=pressure

g= gravity

h= height

ρ=density

P=ρgh

h=P/ρg

h=66/1×9.8

h=6.73 m

The definition of pressure is force/area. For instance, the weight of the snow divided by the area of the roof would be used to illustrate the pressure from snow on a roof. In chemistry, gases are a common source of pressure. The lack of pressure is referred described as a "vacuum." Since "nature abhors a vacuum," humans have long believed that vacuums are both impossibly rare and unnatural. This isn't actually the case

The quantity of pressure units is absurd. The torr or mmHg is a frequently used unit. All that is being discussed here is a mercury column's height. There are 760 torr, or mmHg, in the atmosphere. You may also have a look at mmH2O

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The pressure in the can that holds 2.00 moles of gas at 22.3°C is 48.49atm.

The pressure in a container can be calculated by using the following ideal gas law expression;

PV = nRT

Where;

According to this question, a 1.0L canister holds 2.00 moles of gas at 22.3°C. The pressure can be calculated as follows:

P × 1 = 2 × 0.0821 × 295.3

P = 48.49atm

Therefore, the pressure in the canister is 48.49 atm.

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Answer:

Nitrous oxide,Sulfur trioxide,  Lithium oxide, Lithium oxide,Aluminium oxide, Dichlorine monoxide, Sulfur dioxide, Chromium trioxide, Magnesium oxide,Dichlorine Pentoxide, Potassium oxide, Barium oxide

Explanation:

The concentration of H+ ions is 3.3 x 10^-10 M when [Cu2+] is 0.965 M.

The Ka expression for the given reaction is:

Ka =\([Cu(OH)2] /[Cu2+][H2O]\)

For the reaction to proceed, some of the Cu2+ ions react with water to form Cu(OH)+ ions. The equilibrium concentration of Cu(OH)+ ions is assumed to be negligible.

Therefore, the concentration of Cu(OH)2 is equal to the concentration of OH- ions formed by the reaction. This can be expressed as:

\(Ka = [OH-]^2 /[Cu2+][H2O]\)

Rearranging the equation:

\([OH-]^2 = Ka[Cu2+][H2O]\)

[OH-] = √(Ka[Cu2+][H2O])

Given [Cu2+] = 0.965 M, we can substitute the value in the equation:

[OH-] = √(Ka × 0.965 × 55.5)

At 25°C, the value of Kw (ion product constant for water) is 1.0 x 10^-14. Therefore, we can use the relationship:

Kw = [H+][OH-]

[H+] = Kw / [OH-]

[H+] = \(1.0 x 10^-14 / √(Ka × 0.965 × 55.5)\)

After substituting the value of Ka (equal to 3.00 x \(10^-4\)), we get:

[H+] = 3.3 x\(10^-10 M\)

Therefore, the concentration of H+ ions is 3.3 x \(10^-10 M\)when [Cu2+] is 0.965 M.

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Explanation:

It has to be C, because Carbon can bond with four other atoms and is like a four-hole wheel.

(Sorry if my elplanation was kinds choppy Oof, helpfully it makes sense?)

A. A poster that features brief sentences conveys urgency and simplifies content.

The amount of moles is therefore 0.23 mol 0.23 m o l.

molarity x number of litres = 0.2 x (75/1000) = 0.015 mol.

Molarity (M) is the most often used unit of solution concentration and is defined as the amount of solute in moles divided by the volume of solution in litres: M is the mole of solute per litre of solution. A 1.00 molar solution (written 1.00 M) contains 1.00 mole of solute per litre of solution.

The hydrochloric acid solution has a molarity of 3 M. This indicates that 1 L of solution contains exactly 3 moles of HCl. Our sample has a capacity of 50 mL.

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A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.

Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.

For example, farmers may selectively breed crops to make them resistant to pests or droughts.

One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.

One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.

One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.

Attached is an image of a farmer selectively breeding crops.

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The molarity of the nitric acid solution is approximately 21.44 M.

To find the molarity of the nitric acid solution, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, we need to determine the moles of nitric acid in the solution. To do this, we'll use the equation:

moles = mass / molar mass

The molar mass of HNO₃ is calculated as follows:

H = 1.01 g/mol

N = 14.01 g/mol

O = 16.00 g/mol (x3, as there are three oxygen atoms in HNO₃)

Molar mass of HNO₃ = 1.01 + 14.01 + (16.00 × 3) = 63.01 g/mol

Next, we'll calculate the mass of the nitric acid in the solution:

mass = volume × density

Given density = 1.35 g/mL and volume = 33.7 mL, we can calculate the mass as follows:

mass = 33.7 mL × 1.35 g/mL = 45.495 g

Now, we can calculate the moles of nitric acid:

moles = 45.495 g / 63.01 g/mol ≈ 0.722 mol

Finally, we can calculate the molarity using the moles of nitric acid and the volume of the solution in liters:

Molarity = 0.722 mol / (33.7 mL / 1000) L ≈ 21.44 M

Therefore, the molarity of the nitric acid solution is approximately 21.44 M.

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Answer:

3 valence electrons

Explanation:

Atoms of Boron have 3 valence electrons

Answer:

Isoelectronicity may be used to predict the properties and reactions of a species. It is used to identify hydrogen-like atoms, which have one valence electron and are thus isoelectronic to hydrogen.

Explanation:

Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

n=2,l=1,ml=1 n=3,l=2,ml=0 n=3,l=3,ml=2 n=4,l=2,ml=0.set of quantum numbers cannot specify an orbital.

a zone around a nucleus in an atom or molecule that can have 0–1–2 electrons, as stated theoretically. Around the nucleus, in structures known as orbitals, electrons arrange themselves into clouds. These orbitals are given numbers to represent their energy level and letters (s, p, d, and f) to represent their shape. S, P, D, and f are the four fundamental types of orbitals. Two electrons can fit into a s orbital, which is spherical in shape. There are three p orbitals, each of which is oriented differently in space but has the same fundamental geometry of a . Six electrons can fit in the p orbitals at once.

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The question is mostly solved. The definition of heat is used for this problem which tells us:

Where,

Q is the heat added to the system, 120 J

m is the mass of the metal, 5.0 g

Cp is the specific heat of the metal, 0.385J/g°C

dT is the change of temperature:

T2 is the final temperature, unknown

T1 is the initial temperature, 22°C

We clear the final temperature from the equation:

Now, we replace the known data:

Answer:

The final temperature of the metal will be 84°C

The change in the temperature will be 84°C-22°C=62°C

Answer:

Equal parts are needed to make glucose and oxygen. The excess oxygen is released into the air

Explanation:

This equation explains why having plants in your house is good.

Primary cells are those that produce electricity without first being charged by an electrical current from an outside source.

Thus, A voltaic cell is an electrochemical device that generates electricity through a chemical process.

An electrode where oxidation takes place is the anode. Reduction takes place on the cathode, an electrode. An electrolyte chamber called a salt bridge is required to finish the circuit in a voltaic cell.

Half-cells are compartments that separate the oxidation and reduction reactions. The external circuit, which typically has a load on it, is used to carry the flow of electrons between the electrodes of the voltaic cell.

Thus, Primary cells are those that produce electricity without first being charged by an electrical current from an outside source.

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Answer:

Noble gases

Explanation:

The temperature (in degrees Celsius) of the gas at a volume of 4250 mL and a pressure of 1.25 atm is -63.8 °C

The temperature of the gas at a volume of 4250 mL and a pressure of 1.25 atm can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

(1829 × 3.25) / 308 = (950 × 4.25) / T₂

Cross multiply

1829 × 3.25 × T₂ = 308 × 950 × 4.25

Divide both side by (1829 × 3.25)

T₂ = (308 × 950 × 4.25) / (1829 × 3.25)

T₂ = 209.2 K

Subtract 273 to obtain answer in °C

T₂ = 209.2 - 273 K

T₂ = -63.8 °C

Thus, we can conclude that the temperature is -63.8 °C

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Polonium-214 decays in part by the series of steps in which one alpha-particle as well as two beta-particles are released. The nuclide that results from this series of decays is polonium-210.

Polonium-214 undergoes alpha decay to become lead-210, which is the daughter nuclide of the first decay. Lead-210 then undergoes beta decay to become bismuth-210, which is the daughter nuclide of the second decay. Finally, bismuth-210 undergoes beta decay to become polonium-210, which is the final daughter nuclide of the series. Therefore, the nuclide that results from this series of decays is polonium-210.

Polonium-210 is a radioactive element that undergoes alpha decay. During alpha decay, the atomic nucleus of the polonium-210 atom loses two protons and two neutrons, resulting in the emission of an alpha particle (helium nucleus) from the nucleus.

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Answer:

I think it's D

Explanation:

I'm so sorry if that's wrong, hope it helps!

The temperature at which the vapor pressure of a substance equals the air temperature at sea level. Therefore, the correct option is option D.

The temperature at which a liquid's vapor pressure equals the pressure around it and the liquid transforms into a vapor is known as the boiling point of a material.

A liquid's boiling point changes based on the atmospheric pressure in the area. Lower pressure, or partial vacuum, results in a liquid's boiling point being lower than it would be under atmospheric pressure. The temperature at which the vapor pressure of a substance equals the air temperature at sea level.

Therefore, the correct option is option D.

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Temperature change for water was slight compared to temperature change in metal because of specific heating capacities.

Specific heat capacity, moreover, known basically as specific heat, is the degree of the warm vitality required to extend the temperature of a unit amount of a substance by a certain temperature interim.

Regularly, the metal pole would be much hotter than the water. So, the conclusion can be made that the particular warm of metal is lower than the particular warm of water.

It requires less warm per unit mass to form a more noteworthy alteration in temperature for metal than it does for water.

Specific heat is additionally some of the time alluded to as heat capacity.

Casually, it is the sum of warm that must be included in one unit of mass of the substance in arrange to cause an increment of one unit in temperature. The SI unit of particular warm capacity is joule per kelvin per kilogram, J⋅kg −1 ⋅K −1.

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Answer:

FeCl3 + 3NH4OH ---> Fe(OH)3 + 3NH4Cl

Explanation:

Just make sure that both sides are equal

FeCl3 + 3NH4OH ---> Fe(OH)3 + 3NH4Cl

Answer:

Explanation:

- 3 - 3

yeah it's NaCl, I just looked it up

Answer:

Yes

Explanation:

NaCl is table salt

Also known as sodium chloride

Answer:

It is not equal to Avogadro constant

Explanation:

This is because Avogadro constant refer to the number of molecules or atoms of particles per mile substance and thus is equal to 6.022×10^23 per mile or unit of that substance.

The density of the liquid is 0.794 g/mL.

To calculate the density of the liquid, we can use the formula:

Density = Mass / Volume

Given information:

Mass of the graduated cylinder = 105.56 g

Volume of the liquid = 45.4 mL

Total mass of cylinder and liquid = 136.15 g

To find the mass of the liquid, we subtract the mass of the cylinder from the total mass:

Mass of the liquid = Total mass - Mass of the cylinder

Mass of the liquid = 136.15 g - 105.56 g

Mass of the liquid = 30.59 g

Now we can calculate the density:

Density = Mass of the liquid / Volume of the liquid

Density = 30.59 g / 45.4 mL

Converting mL to cm³ (since 1 mL = 1 cm³):

Density = 30.59 g / 45.4 cm³

Density = 0.674 g/cm³

Rounding to three decimal places, the density of the liquid is approximately 0.794 g/mL.

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An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵ m.

Scientific notation is also called as standard form. Scientific notation is used to express the number that is too large number  or too small is  convenient written in a decimal form. scientific notation contains two part decimal number multiply power of 10.

given data is as follows :

infrared wave has wavelength = 0.000005 m

the scientific notation of the wavelength given is = 5.0 × 10⁻⁵ m

Thus, An infrared wave has a wavelength of 0.00005 m. this wavelength in scientific notation is 5.0 × 10⁻⁵.

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