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This liquid level differential corresponds to a pressure of 16.220 mmHg s, or four sig figs. when the liquid level inside the eudiometer was 22.06 cm greater than the liquid level in the beaker

The force perpendicularly applied to an object's surface divided by the area over which it is dispersed is known as pressure. The gauge pressure, also known as gauge pressure, is the pressure in relation to the surrounding air pressure.

A liquid level sensor is an instrument for measuring the height of a liquid and converting it to an electrical signal which is sent to other instrumentation to display, monitor, log or control the liquid level.

Height = 22.06 cm

1 mm Mg = 13. 60 mm.

= 22.06 cm x (10 mm*1cm)

= 220.6 mm X (1 mm Hg *13. 60 mm)

= 220.6 mm/ 13.60mm

=16.220 mmHq

= 16.220 mmHg

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If the balloons are placed in a warmer room, all of the balloons will increase in volume equally because they have equal numbers of molecules.

The correct answer is D.

According to the ideal gas law, the volume of a gas is directly proportional to its temperature when the pressure and number of moles are held constant.

When the balloons are placed in a warmer room, the temperature increases resulting in an increase in volume. Since all three balloons have the same number of molecules and experience the same increase in temperature, they will all increase in volume equally.

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Answer:

it have been already balanced

2H2 + O2 = 2H2O.

The possible values of l are 2, 1, and 0, indicating the dxy, dyz, dzx, dxz, and dx2-y2 orbitals.

1. The value of 1 is not represented by a d orbital.

The azimuthal quantum number (l) specifies the shape of an orbital and can take values ranging from 0 to (n-1).

For example, when n = 2 (representing the second energy level or shell), the possible values of l are 0 and 1.

In this case, l = 0 corresponds to an s orbital, and l = 1 corresponds to a p orbital.

The d orbitals are represented by l = 2.

So, for the d orbitals, the possible values of l are 2, 1, and 0, indicating the dxy, dyz, dzx, dxz, and dx2-y2 orbitals.

2. In the quantum mechanical model of the atom, the symbol "n" represents the principal quantum number.

The principal quantum number determines the energy level or shell in which an electron is located.

It describes the size and average distance of an electron from the nucleus.

The principal quantum number can take positive integer values (1, 2, 3, etc.), with each value representing a different energy level.

The higher the value of n, the higher the energy level and the larger the orbit of the electron.

Electrons in higher energy levels are located farther from the nucleus.

The number of possible subshells within a given energy level is equal to the value of n.

For example, if n = 2, there are two subshells: the s subshell (l = 0) and the p subshell (l = 1).

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Answer:polyatomic molecules

Explanation:molecule, a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.Characteristics of molecules

The division of a sample of a substance into progressively smaller parts produces no change in either its composition or its chemical properties until parts consisting of single molecules are reached. Further subdivision of the substance leads to still smaller parts that usually differ from the original substance in composition and always differ from it in chemical properties. In this latter stage of fragmentation the chemical bonds that hold the atoms together in the molecule are broken.

Ai. The concentration of hydronium ion, [H₃O⁺], is 0.10 M

Aii. The concentration hydroxide ion, [OH⁻] is 1×10⁻¹³ M

Bi. The concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M

Bii. The concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M

i. The concentration of hydronium ion, [H₃O⁺] can be obtained as follow:

HCl(aq) + H₂O <=> H₃O⁺(aq) + Cl⁻(aq)

From the above equation,

1 mole of HCl  contains 1 mole of H₃O⁺

Therefore,

0.10 M HCl will also contain 0.10 M H₃O⁺

Thus, the concentration of hydronium ion, [H₃O⁺] is 0.10 M

ii. The concentration of hydroxide ion, [OH⁻] can be obtained as follow:

[H₃O⁺] × [OH⁻] = 10¯¹⁴

0.10 × [OH⁻] = 10¯¹⁴

Divide both side by 3.02×10⁻¹⁰

[OH⁻] = 10¯¹⁴ / 0.10

[OH⁻] = 1×10⁻¹³ M

Thus, concentration of hydroxide ion, [OH⁻] is 1×10⁻¹³ M

First, we shall obtain concentration hydroxide ion, [OH⁻]. Details below:

Mg(OH)₂(aq) <=> Mg²⁺(aq) + 2OH⁻(aq)

From the above equation,

1 mole of Mg(OH)₂ is contains 2 mole of OH⁻

Therefore,

1.4×10¯⁴ M Mg(OH)₂ will contain = 1.4×10¯⁴ × 2 = 2.8×10¯⁴ M OH⁻

Thus, concentration hydroxide ion, [OH⁻] is 2.8×10¯⁴ M

Now, we shall obtain the concentration of hydronium, ion [H₃O⁺]. Details below:

[H₃O⁺] × [OH⁻] = 10¯¹⁴

[H₃O⁺] × 2.8×10¯⁴ = 10¯¹⁴

Divide both side by 2.8×10¯⁴

[H₃O⁺] = 10¯¹⁴ / 2.8×10¯⁴

[H₃O⁺] = 3.57×10⁻¹¹ M

Thus, the concentration of hydronium, ion [H₃O⁺], is 3.57×10⁻¹¹ M

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Answer:

The acceleration of a moving object can be calculated by dividing the change in velocity by the change in TIME

Explanation:

Took the practice

The new pressure at STP if the volume remains constant is 4.15 atm.

To solve this problem, we need to use the combined gas law, which states that PV/T = constant.

First, we need to convert the temperature from 95.3 degrees Celsius to Kelvin by adding 273.15. This gives us a temperature of 368.45 K.

Next, we can use the given pressure and temperature to find the initial volume of the gas using the ideal gas law, which states that PV = nRT. We can assume that the amount of gas (n) and the gas constant (R) remain constant, so we can rearrange the equation to solve for V:

V = (nRT)/P

Plugging in the values given, we get:

V = (nRT)/P = (nR(368.45 K))/(6.3 atm)

Now, we can use the combined gas law to find the new pressure at STP (standard temperature and pressure, which is 0 degrees Celsius or 273.15 K and 1 atm). Since the volume remains constant, we can set the initial pressure and temperature equal to the final pressure (P2) and temperature (T2), respectively:

(P1V1)/T1 = (P2V1)/T2

Simplifying, we get:

P2 = (P1/T1) x T2

Plugging in the values for P1, T1, and T2, we get:

P2 = (6.3 atm/368.45 K) x 273.15 K

Solving for P2, we get:

P2 = 4.15 atm

Therefore, the new pressure at STP if the volume remains constant is 4.15 atm.

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Answer: A likely effect on the watershed resulting from logging would be increased water temperature.

Explanation: Not only will the removal of trees from the watershed would result in the decrease of Dissolved Oxygen(DO) in the water, but also increase temperature because the leaves of the trees absorb heat, which indirectly decreases the temperature of the river.

Taking into account the definition of density, the density of the liquid is 0.76 \(\frac{g}{mL}\).

First of all, density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

\(density=\frac{mass}{volume}\)

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know:

So, replacing in the definition of density:

\(density= \frac{19 g}{25 mL}\)

Solving:

\(density= 0.76 \frac{g}{mL}\)

Finally, the density of the liquid is 0.76 \(\frac{g}{mL}\).

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Answer to Question #96220 in Molecular Physics | Thermodynamics for Kaleesh

Answers>Physics>Molecular Physics | Thermodynamics

Question #96220

a) Determine the enthalpy changes, ΔH for the reaction below, given the following reactions and subsequent ΔH values. Please rewrite the amended chemical reaction equation again.

N2H4 (l) + CH4O (l) CH2O (g) + N2 (g) + 3H2 (g)

2NH3 (g) N2H4 (l) + H2 (g) ΔH = 22.5kJ

2NH3 (g) N2 (g) + 3H2 (g) ΔH = 57.5 kJ

CH2O (g) + H2 (g) CH4O (l) ΔH = 81.2 kJ

b) Given that the enthalpy of vaporization for water as below:

H2O (l) H2O (g) ΔH vap = 44.0 kJ mol-1

Calculate enthalpy ΔH for each of the following processes:

i) Evaporating 3.00 moles of water

ii) Evaporating 3.00 grams of water

i) Condensing 20.0 grams of water

(3 Marks)

c) Use the enthalpy of formation data to calculate the enthalpy of the reaction below.

2C2H6 (g) + 7O2 6H2O (g) + 4CO2 (g)

Answer:

The theory supported by the evidence in the table is,

Theory B, Gas molecules are trapped between the layers allowing the layers to slide over one another  

Explanation:

The table showing the ability of graphite to act as a lubricant in different locations is given as follows;

Ability to act as a lubricant     \({}\)        Location

Earth's surface                          \({}\)       Good

High altitude          \({}\)                          Average

Outer space           \({}\)                          Very poor

The crystals of graphite are made up of graphenes which are rings of atoms of carbon atoms arranged in parallel planes. The bonds between graphene planes are Van der Waals forces, such that under appropriate conditions, the planes easily slide relative to one another which partly gives graphite its lubricating property when used in air

When adsorbed on the surface of the graphite, molecules of water reduces the force bonding the planes of the graphenes further such that the graphite's lubricating property is related to the availability of water vapor

Therefore, given that the lubricity of graphite is highly dependent on the availability of water vapor, and that the availability of water vapor which is a gas, is reduced with increasing altitude, to being absent in outer space, the theory supported by the evidence in the table is Theory B, which states that  gas molecules are trapped between the layers allowing the layers to slide over one another.

Explanation:

Molar mass of CoSO4 = 155g/mol

Moles of CoSo4 = 0.55/155 = 0.00354mol.

Molar mass of H2O = 18g/mol

Mass of H2O = 1 - 0.55 = 0.45g

Moles of H2O = 0.45/18 = 0.025mol

Molar ratio of CoSo4 : H2O = 0.00354 : 0.025 ≈ 1 : 7.

Hence, the chemical formula of the hydrated cobalt (II) salt is CoSO4 • 7 H2O.

Answer:

Metals tend to have a low attraction for electrons.

Cohesive properties of water makes it move upward from the roots of plants.

The cohesive properties of water which is caused due to hydrogen bonding between adjacent water molecules allow the column of water to be 'pulled' up through the plant as water molecules present at the surfaces of leaf cells are evaporating. This process of water uptake in plants due to cohesion has been termed as the Cohesion Theory of Sap Ascent in plants.

There are three properties of a water molecule which enables it to move from the root system to the leaves of the plant. The three properties are cohesion, adhesion, and high surface tension.

Hence, option C is correct.

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Answer: answer A

Explanation: because it gives more detail and a summarizations

Answer: Sodium (Na) has a higher shielding effect compared to lithium (Li).

Explanation:

Shielding effect refers to the ability of inner electron shells to shield the outermost electrons from the positive charge of the nucleus. In the case of sodium, it has 11 electrons arranged in three energy levels or shells (2, 8, and 1), while lithium has only 3 electrons arranged in two energy levels (2 and 1).

The additional electron shell in sodium provides more shielding for the outermost electron from the positive charge of the nucleus. This increased shielding effect in sodium compared to lithium means that the outermost electron in sodium experiences a weaker attraction to the nucleus, making it easier to remove or ionize.

Sodium (Na) has a greater shielding effect than lithium (Li). This is because the atomic number of sodium is more than the atomic number of lithium.

The shielding effect is defined as the ability of inner electrons in a particle to shield the outer electrons from the entire nuclear charge. Elements that have larger atomic numbers have more inner electron shells, so they offer more shielding for the outer electrons.

In this case, we are comparing lithium (Li) and sodium (Na). The atomic number of lithium is 3, whereas the atomic number of sodium is 11. Because sodium has a higher atomic number than lithium, it has more inner electron shells than lithium. As a result, sodium has a greater shielding effect than lithium.

In conclusion, sodium (Na) has a stronger shielding effect than lithium (Li).

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The kinds of intermolecular forces that are present in each element or compound are as follows:

1. Kr - dispersion forces

2. NH3 - dispersion forces, dipole-dipole forces and hydrogen bonding

3. NO - dispersion forces and dipole-dipole forces

4. CH4 - dispersion forces


Let's understand this in detail:

The electronegativity of the atom in question and the relative proximity of the atom to other atoms determines the strength of the intermolecular forces.

In Kr, the intermolecular forces present are the weakest type, dispersion forces. This is because Kr is a noble gas with the lowest electronegativity among the elements.

In NH3, stronger dispersion forces, dipole-dipole forces, and hydrogen bonding are present because nitrogen has a high electronegativity and is surrounded by three hydrogen atoms with partial positive charges due to their electron-deficient nature.

In NO, there are only dispersion and dipole-dipole forces since no hydrogen atom is present to form hydrogen bonding.

Finally, in CH4, only dispersion forces are present since the four hydrogen atoms do not form a tetrahedral structure due to their symmetrical electron distribution.

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Number of (NH4)2SO4 molecules = 2.16 × 10^25 molecules / 2 = 1.08 × 10^25 (NH4)2SO4 molecules. There are approximately 1.08 × 10^25 molecules of ammonium sulfate in 35.8 moles of (NH4)2SO4.

To determine the number of molecules in 35.8 moles of ammonium sulfate ((NH4)2SO4), we need to use Avogadro's number, which states that there are 6.022 × 10^23 particles (atoms, molecules, or ions) in one mole of any substance.

The molecular formula of ammonium sulfate indicates that there are two ammonium ions (NH4+) and one sulfate ion (SO4^2-) in each molecule.

To calculate the number of molecules in 35.8 moles of (NH4)2SO4, we can follow these steps:

Determine the number of moles of (NH4)2SO4 by multiplying the given value by Avogadro's number:

Number of moles = 35.8 moles × (6.022 × 10^23 molecules/mole) = 2.16 × 10^25 molecules

Since each molecule of (NH4)2SO4 contains one ammonium ion and one sulfate ion, the number of molecules can be divided by two to obtain the number of (NH4)2SO4 molecules:

Number of (NH4)2SO4 molecules = 2.16 × 10^25 molecules / 2 = 1.08 × 10^25 (NH4)2SO4 molecules

Therefore, there are approximately 1.08 × 10^25 molecules of ammonium sulfate in 35.8 moles of (NH4)2SO4.

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Answer:

Ores mined from shields.

Explanation:

Ores mined from shields are the source from which we get the history of Precambrian rocks. The Ores from shield experience the Precambrian era so that's why its rocks provides information about that era. The Precambrian supereon is the division of the geological time scale which is the first and longest stage in the history of the Earth which also includes the Hádic, Archaic and Proterozoic eons.

Explanation:

Intermolecular force s between particles in a matter holds particles of molecules together in substances.

Answer:

Total energy increases.

Explanation:

Answer:stored energy decreases

Explanation:

Answer:

covalent bond

Explanation:

Answer:

Hope this helps you

When solution equilibrium occurs the concentration of the solution remains constant.

Equal forward and reverse reaction rates are required. There is no requirement that the amounts of reactants and products be equal. Nonetheless, the quantities of reactants and products will remain constant after equilibrium has been reached.

An object must satisfy two requirements of equilibrium in order to maintain static equilibrium. Initially, there must be no net force acting on the item. Second, there must be no net torque pulling on the object.

According to the equilibrium law, an equilibrium constant is equal to the product concentrations multiplied by the reactant concentrations multiplied by one another (K).

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Explanation:

cooked rice

nutrient

carbohydrate.

Boiler eggs

nutrient

Protein.

Answer:increases by a factor of 10

Explanation: the concentration of the solution changed from 4 to 3

Large tides, called spring tides, are experienced in the Earth's oceans when the Moon is in position C A and C.

Large tides, also known as spring tides, are the highest and lowest tides experienced in the Earth's oceans. They occur when the gravitational forces of the Moon and Sun are aligned, either on the same side of the Earth or on opposite sides. This alignment results in a combined gravitational pull on the Earth's oceans, causing the tides to rise to their maximum height and then fall to their minimum height.

Spring tides occur twice a month, during the full moon and new moon phases, and they have a greater tidal range than the more common, intermediate tides known as neap tides. The height of the tides is affected by a number of factors, including the size and shape of the ocean basin, the depth of the water, and the coastlines and ocean currents.

It is important to note that the term "spring tide" has nothing to do with the season of spring, but rather is derived from the Old English word "springan," which means to "leap up."

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Answer:

1.15 moles H₂

Explanation:

To find the moles of H₂ gas, you need to use the Ideal Gas Law equation. The equation looks like this:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (0.08206 L*atm/mol*K)

-----> T = temperature (K)

Before you can plug the given values into the equation and simplify, you need to convert Celsius to Kelvin.

P = 0.923 atm                     R = 0.08206 L*atm/mol*K

V = 29.6 L                           T = 17.0 °C + 273.15 = 290.15 K

n = ? moles

PV = nRT

(0.923 atm)(29.6 L) = n(0.08206 L*atm/mol*K)(290.15 K)

27.3208 = n(23.809709)

1.15 = n