heisenberg uncertainty principle definition chemistry

The number of atoms contained in 1 mole of the hydrogen molecule is  12.044 x 10^23.

The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022 × 10^23  elementary entities.

The molecular formula for hydrogen is H2. So there are two atoms in the molecule of hydrogen. One mole of hydrogen molecule contains 6.022x10^23 hydrogen molecules.

This number 6.022×10^23 is called Avagardo Number. This is a constant value. Since there are two hydrogen atoms in a hydrogen molecule hence, one mole of H2 molecule contains (2 x 6.022 x 10^23 = 12.044 x 10^23) atoms.

Therefore, The number of atoms contained in 1 mole of the hydrogen molecule is  12.044 x 10^23.

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Dissolving a substance is considered a physical change.

When a substance dissolves in a solvent, the particles of the substance are dispersed throughout the solvent and become evenly distributed, but the chemical composition of the substance does not change. The dissolved substance retains its chemical properties and can be separated from the solvent by physical means such as evaporation or distillation.

A chemical change, on the other hand, involves a change in the chemical composition or properties of a substance. It typically involves the formation of new substances, the breaking or making of chemical bonds, and the release or absorption of energy. Examples of chemical changes include combustion, rusting, and acid-base neutralization.

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Answer:

Gold in a wedding ring

Explanation:

I think this is the answer. Im sorry if its wrong

The one case that the surroundings do work on the system is q = -17 KJ, w = + 58 kJ. The correct option is A.

As work is negative, it indicates that the system is doing the work because when the system works, energy is expended and volume rises.

If the work is constructive, the system is being worked on because it is absorbing energy and its volume is decreasing.

Work = Force Distance is the formula for calculating work. The joule (J), sometimes known as the Newton meter (N m), is the SI unit for work.

Therefore, the correct option is A. q = -17 KJ, w = + 58 kJ.

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A 0.0333-liter sample of gold would weigh 0.64326 grams.

This is calculated by multiplying the density of gold by the volume of the sample.

the density of gold = 19.32g/ml

the volume of the sample = 0.0333 L

sample weight = the density of gold × the volume of the sample

which is  19.32g/ml  ×  0.0333 L = 0.64326

In chemistry, density is a measure of the mass of a substance per unit of volume. It is typically represented by the Greek symbol "rho" (ρ) and is typically measured in units of grams per milliliter (g/mL) or grams per cubic centimeter (g/cm^3). A substance's density can be calculated by dividing its mass by its volume.

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.

Δt = 25°C - 10°C = 15°C

c = 4.2 J g^-1 °C^-1

m = 10 g

Heat energy required

= mcΔt

= 10×4.2×15

= 630 Joules

The positively charged center in an atom is called as Nucleus. It is made up of positively charged protons and neutral sub-atomic particle called as neutrons.

What is meant by protons ?

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The larger particle is Na (a) and not Na+ (b).

All matter consists of atoms that contain a nucleus and orbiting electrons. The nucleus consists of two kinds of atomic particles called protons and neutrons, collectively known as nucleons.

The protons has a mass of 1.67 × 10−27 kg and a positive electronic charge of 1.6 × 10−19 coulombs (C).

So from the question, The atomic number of Na is 10 and electrons' count is also 10. The atomic number of  Na+ is 10 and electrons' count is 9.

This means that In Na+, the same effective nuclear charge is acting on less number of electrons compared to Na. so, the attraction will be more.

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We do not just calibrate the gas thermometer at absolute zero because absolute zero cannot practically produced in o any lab setting.

Reason -

In order to cool a substance to absolute zero (-243-15°C), an unlimited amount of work would be required to remove the heat from it. Therefore, it is essentially impossible to create an environment with an absolute zero temperature.

Because absolute zero cannot effectively be manufactured in any lab setting, we cannot calibrate our thermometer at that temperature due to letter C. Since we cannot create absolute zero,

a thermodynamic system has its lowest energy at absolute zero degrees Celsius. It is equivalent to 459.67 degrees Fahrenheit and 273.15 degrees Celsius, respectively, on the thermometer.

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In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.

Q = m•C•ΔT, Where Q is the amount of heat that is transported to or from the item, m is the object's mass, C is the material's specific heat capacity, and T is the change in temperature that results as a result.

7.40g of water needs 526.35 joules of heat energy to reach the desired temperature.

According to the following formula, the amount of energy is expressed:

The specific heat of water is 4.184 J/g0C and its mass is 7.40 grams.

In the formula, replace the specified parameters with:

In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.

In order to heat 7.40g of water to a higher temperature, 526.35 joules of heat energy are needed.

The complete question is,

The temperature of 7.40g of water must be raised from 29.0 OC to 46.0 OC. Calculate the joules of heat energy needed to do so. 4.184 J/gOC for water's specific heat.

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The 400.0g of water requires 526.35 joules of heat energy.

The formula,

Q = m•C•T, where Q is the amount of heat transported to or from the item, m is the mass of the object, C is the specific heat capacity of the material, and T is the temperature change as a result.

To reach the desired temperature, 400.0g of water requires 526.35 joules of heat energy.

The amount of energy is expressed using the following formula:

Water has a specific heat of 0.664 J/g0C and a mass of 400.0 grams.

Replace the specified parameters in the formula with:

526.35 joules of heat energy are required to heat 400.0 g of water to a higher temperature.

526.35 joules of heat energy are required to heat 400.0g of water to a higher temperature.

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The molar mass of a material is its mass expressed in grams per mole of the chemical.

The ratio between a sample's mass and its substance content is known as the molar mass of a chemical compound in chemistry. A substance's molar mass is a bulk attribute rather than a molecular one.

A substance's molar mass is its mass in grams per mole of the chemical. A mole is the measurement of the quantity of atoms, molecules, or ions in a substance.

You may determine the mass of 1 mole of a compound by looking at its molar mass. In other words, it provides the amount of grams in a substance per mole. As a result, molar mass is measured in grams/mole.

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Minerals can be located using geochemical surveys and remote sensors that analyze satellite images. Following that, mining or quarrying is used to remove many minerals.

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Quartz silica tetrahedra (SiO2) are linked in a "perfect" three-dimensional framework. Each tetrahedron is connected to four other tetrahedra (with one oxygen shared at each corner),

The silicon-to-oxygen ratio is one-to-one. The silicon atom's outer shell includes four electrons. Each of the four electrons in the silica tetrahedra is shared with one of the four oxygen atoms that are linked. In turn, each oxygen atom shares one of the six electrons in its outer shell. Two single chains of silica tetrahedra join together by sharing the third oxygen in alternating tetrahedra to produce an atomic structure. A kind of silicate mineral in which silica tetrahedra are arranged hexagonally. The quartz silica tetrahedra (SiO2) are connected in a "perfect" arrangement. Framework in three dimensions. Each tetrahedron is connected to four other tetrahedra (with one oxygen shared at each corner),

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B) The number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23.

To find the number of Br- ions present in 1.00 moles of FeBr3, we need to first determine the number of moles of Br- ions present in the compound. FeBr3 is a compound that contains 1 Br- ion per formula unit.

To find the number of moles, we can use the formula:

moles = number of atoms / Avogadro's number (6.02E23)

The number of moles of Br- ions in 1.00 moles of FeBr3 is:

1.00 moles x (1 Br- ion / 1 formula unit) = 1.00 moles

So, the number of Br- ions present in 1.00 moles of FeBr3 is 6.02E23 ions.

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There are three chlorine atoms in each FeCl3 molecule. In terms of the total number of atoms in the molecule ferric chloride, there are four.  chlorine atoms are in the compound fe2cl3.

Chlorine atoms molecules are made up of two atoms (Cl2). Except for the lighter noble gases, chlorine interacts with practically all elements to form chlorides; those of most metals are ionic crystals, whilst those of semimetals and nonmetals are mostly molecular. Chlorine has an atomic mass of 35.45 and an atomic number of 17, implying that one atom of chlorine has 17 protons, 17 electrons, and 18 neutrons. Chlorine, being a member of the Periodic Table's halogen family, is particularly reactive with metals and creates salts. When the element chlorine (a halogen) obtains an electron or when a molecule such as hydrogen chloride is dissolved in water or other polar solvents, it is produced. Sodium chloride and other chloride salts are frequently extremely soluble.

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Answer:

6.022 x [tex]10^{22}[/tex] molecules

Explanation:

One mole of any substance has 6.022x [tex]10^{23}[/tex] particles.

Mr of water: 16 + 2 = 18 g

moles of water given: 1.8/18 = 0.1 moles

Using ratio:

moles   :   molecules

   1        :    6.022x [tex]10^{23}[/tex]

 0.1      :          X

X = 0.1 x (6.022x [tex]10^{23}[/tex] )

X = 6.022 x [tex]10^{22}[/tex]

Answer:

36g

Explanation:

H2 = 2

O = 16

18 = Mr of H2O

mass = moles x Mr

mass = 2 x 18

mass = 36g

H2C=CH-CH=CH-CH2-Mg-Br   + D2O------ H2C=CH-CH=CH-CH2-D   + DO- Mg-Br, H2C=CH-CH=CH-CH2-Mg- Br is Grignard reagent , it is highly polar in nature so it is highly reactive.

mecanism

H2C=CH-CH=CH-CH2-Mg- Br is Grignard reagent , it is highly polar in nature so it is highly reactive               .

H2C=CH-CH=CH -CH2-Mg-Br------ H2C=CH-CH=CH -CH2- + Mg+-Br

H2C=CH-CH=CH -CH2-  that intermediate show resonance so become more product.

H2C=CH-CH=CH -CH2-  <-----> H2C=CH-CH--CH=CH2 <-----> -CH2-CH=CH-CH=CH2

So two product possible

D2O----- OD- + D+

product1-    H2C=CH-CH=CH2 -CH2- + D+----      .H2C=CH-CH=CH-CH2-D major product

product2-   H2C=CH-CH--CH=CH2 +  D+-----   H2C=CH-CHD-CH=CH2

step-2 Mg+-Br + OD----- DO- Mg-Br

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The complete question is:

draw the structure of the organic product or products formed in the reaction.

The magnitude of vertical displacement is 2.73×10−6m as it exits the region between the plates.

The electron narrowly escapes impacting the top plate as it travels between the charged plates and feels an upward pull.

Due to its slower acceleration and higher mass, the proton won't hit any plates.

To calculate the vertical displacement as the object exits the plates, we once more use the kinematic equations.

The electron feels a force upward as it passes between the charged plates and narrowly avoids striking the top plate. It just misses the to plate by a small amount as it moves higher.

The distance it travels in the y-direction is 0.005m.

Time of flight is t=0.0200m1.60×106ms−1 =1.25zz10−8s

the initial y-velocity is zero.

so, 0.005m=12a(1.25×10−8s)2

or, a=6.40×1013ms−2

But also a=Fm= eEme

E= (9.1×10−31kg)(6.40×1013ms−2)1.60×10−19C =364NC−1

The proton will accelerate less and miss the plates since it is more massive. We once more utilise the kinematic equation to determine the vertical displacement when it occurs for the plates.

y=12at2=12eEmp(1.25×10−8s) =2.73×10−6m

The proton won't collide with a plate because, despite the fact that the electric force felt by the proton and electrons is identical, the electric force produces a smaller acceleration that is significantly greater than g, making it plausible to disregard gravity.

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Complete question is:

If the proton would not hit one of the plates, what would be the magnitude of its vertical displacement as it exits the region between the plates?

The elements most likely to react in the same manner in a chemical reaction are those that are in the same group. It because of the same number of valence electrons.

The elements in the same group are most likely to react in the same manner in a chemical reaction. It is because their outer shells have the same number of valence electrons. In fact, the electrons are the component of an atom that is involved in reactions. Meanwhile, the protons and neutrons in an atom's nucleus are not involved in reactions.

For example:

- They all have one valence electron, which they easily lose when forming ions.

- They are easily reacted with water

- They possess low melting points and densities

- They are good electrical conductors.

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The three layers of the Earth's interior, stated in order from center to surface, are the core, mantle and the crust.

Earth is the planet we live on, one of eight planets in our solar system and the only known place in the universe to support life. Earth is the third planet from the sun, after Mercury and Venus and before Mars. It is about 150 million kilometers (about 93 million miles) from the sun. This distance, called an astronomical unit (AU), is a standard unit of measurement in astronomy. Earth is one AU from the sun.

The planet Jupiter is about 5.2 AU from the sun—about 778 million kilometers (483.5 million miles). Earth is the largest and most massive of the rocky inner planets, although it is dwarfed by the gas giants beyond the Asteroid Belt.

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The actual volume of molecules of gas is negligible as compared to the total volume of gas since C. Both A and B.

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The boiling point in °C, of a 0.743 molal aqueous solution of KCL is 100.761 ∘ C

Δ T b≡ T b − T * b = I K b m ,

where:

The difference between the solution's boiling point, T b, and the pure solvent's boiling point, T * b, in degrees Celsius, is known as T b.

The van't Hoff factor, or the actual number of solute particles in solution, is denoted by the letter i.

The water boiling point elevation constant is K b = 0.512 C/m.

mol solute/kg solvent is the solution's molality, or m. Does the solute have a high or low volatility?

Considering complete dissociation.

KCl ( a q ) → K + ( q ) + Cl − ( a q )

Additionally, 1+1=2i, thus...

T b = T * b + i K b m

= 100 ∘ C + 2 ⋅ 0.512 ∘ C/m ⋅ 0.743 m

= 100.761 ∘ C

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Pork must be held in hot holding at a minimum temperature of 135°F.

Between 42°F and 134°F, food is deemed to be in the "Danger Zone". The microorganisms that cause food related disease grow swiftly in food stored in the "Danger Zone" temperature range. Foods that are kept hot must always be kept at 135 degrees or higher.

The recommended storage temperature for hot meals is 135 degrees Fahrenheit or higher. Here are some suggestions for keeping hot meals safe: Never reheat food in a hot holding appliance. Food should be cooked to a safe temperature before being stored. Aseptic canning, also known as high-temperature-short-time (HTST) processing, is the process of filling presterilized containers with a sterile, cooled product and sealing them in a sterile environment with a sterile cover.

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Magnesium oxide (MgO) is created as a Compound when magnesium (Mg) metal is burnt in the presence of oxygen (O2).

A compound is a chemical that is created when two or more other substances are combined. When substances interact, they generate compounds by forming bonds and joining together. Fixed ratios are used to blend the chemical components.

Magnesium oxide is a chemical that is created when magnesium (metal) and oxygen (O) are united. In this combination, the proportions of magnesium and oxygen are equivalent. These elements' various traits came together to create this compound property.

The total number of atoms in a compound's molecule is indicated by the molecular formula.

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12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm

Barium can be defined as a chemical element with the symbol Ba and atomic number 56.

To find the number of barium atoms that would have to be laid side by side to span a distance of 2.60 mm.

we need to divide the distance by the radius of one barium atom:

2.60 mm / 217 pm = 12,005

Therefore, 12,005 barium atoms would have to be laid side by side to span a distance of 2.60 mm.

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An atom is made up of three subatomic particles namely; protons, neutrons and electrons.

The proton is the positively charged particle in the nucleus of the atom while the electron is the negatively charged particle surrounding the nucleus.

The number of neutrons can be calculated by subtracting the atomic number of the element from the mass number.

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Answer:

Valence electrons are electrons located in the outermost energy level (Responsible for bonding.)

Explanation:

Hope this helps :)

Answer:

C Two

Explanation:

no of proton = no of electron

To remove electrons in the photoelectric experiment, experimenters must try blue light. (B)

The photoelectric effect occurs when one of the metal plates is exposed to light, there is a current going to the other metal plate, as has been detected by the ammeter in the circuit above.

The ability of light to move electrons depends on its frequency. So if for example the light intensity is small but the frequency is large, the electrons will still be able to escape.

The energy that causes this movement of electrons is from the electromagnetic waves of light.

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