List any two advantages of using mercury and thermetric liquid

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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The name of a compound is determined by IUPAC nomenclature

The International Union of Pure and Applied Chemistry have designated a universal rule for the nomenclature of organic compounds generally known as IUPAC nomenclature.

The whole idea of the IUPAC nomenclature is to have a universally agreed pattern of naming organic compounds according to their structure.

The compound is always named in such a way that the substituents and the functional group receives the lowest number.

In this case, the functional group is alkyne hence the name of the compound ends in -yne. The methyl group is substituted on position four.

Putting all these together the compound should be named as;  4-methylhept-2-yne

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Answer:

Option A, The pH of the solution is 2.7 and the solution is acidic

Explanation:

As we know,

pH =  - log [H3O+]

Substituting the given values, we get

pH =  - log [2.1 x 10-3 M]

pH =  - (-2.678)

pH = 2.678 or 2.7

The solution is acidic as pH value is less than 7

Hence, option A is correct

Answer:

D NO3 Nitrate is a nitrogen oxoanion formed by loss of a proton from nitric acid.

10.7 mExplanation:The wavelength of a wave can be found by using the formulawherec is the speed of the wavef is the frequencyFrom the questionc = 6420 m/sf = 600 HzWe haveWe have the final answer as10.7 mHope this helps you

Answer::

Explanation::

We require 0.041 moles of sulphate hemihydrate and 0.041 moles of sulphate dihydrate in equal parts.

Number of moles x Molar mass = Mass of sulphate dihydrate

Sulphate dihydrate mass equals 0.041 mol 140.18 g/mol 5.74 g

To make 10 grammes of sulphate hemihydrate, 5.74 grammes of sulphate dihydrate must be cooked.

We must take into account the molar weights and stoichiometry of the compounds in order to calculate how many grammes of sulphate dihydrate (CaSO42H2O) must be heated in order to produce 10 grammes of sulphate hemihydrate (CaSO4)2H2O.

The formula below can be used to get the molar mass of sulphate dihydrate (CaSO42H2O):

One atom of calcium (Ca) is equivalent to 40.08 g/mol.

One atom of sulphur (S) is equivalent to 32.06 g/mol.

Oxygen (O): 4 atoms at 16.00 g/mol equals 64.00 g/mol.

4 atoms of hydrogen (H) at 1.01 g/mol make up 4.04 g/mol.

CaSO42H2O has a total molar mass of 140.18 g/mol.

The sulphate hemihydrate's (CaSO4) molar massThe formula for 2H2O is as follows:

Calcium (Ca): 80.16 g/mol from 2 atoms at 40.08 g/mol.

Sulphur (S): 2 atoms with a 32.06 g/mol density equals 64.12 g/mol.

Oxygen (O): 6 atoms times 16.0 g/mol equals 96.0 g/mol

Hydrogen (H): 2.02 g/mol for 2 atoms, or 1.01 g/mol.

CaSO4's total molar mass2 H2O equals 242.30 g/mol.

Using the molar mass, we can now determine how many moles of sulphate hemihydrate (CaSO4)2H2O) are contained in 10 grammes:

Mass / Molar mass = number of moles

10 g divided by 242.30 g/mol yields 0.041 moles.

One mole of sulphate dihydrate (CaSO42H2O) produces one mole of sulphate hemihydrate (CaSO4)2H2O, as shown by the reaction's stoichiometry.

As a result, we require 0.041 moles of sulphate hemihydrate and 0.041 moles of sulphate dihydrate, respectively:

Number of moles x Molar mass = Mass of sulphate dihydrate

Sulphate dihydrate mass equals 0.041 mol 140.18 g/mol 5.74 g

In order to produce 10 grammes of sulphate hemihydrate, 5.74 grammes of sulphate dihydrate must be cooked.

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The mass concentration of sand in the ethanol solution is 0.299 g/dm³.

To find the concentration in grams per cubic decimeter (g/dm³), we first need to convert the volume from liters to cubic decimeters (dm³). Since 1 liter is equal to 1 cubic decimeter, we can directly convert the volume.

Given:

Mass of sand = 0.2 g

Volume of ethanol = two-thirds liter

Converting volume to dm³:

1 liter = 1 cubic decimeter

two-thirds liter = (2/3) cubic decimeter = 0.67 dm³ (rounded to two decimal places)

Now we can calculate the concentration in g/dm³ by dividing the mass of sand by the volume in dm³:

Concentration = Mass / Volume

Concentration = 0.2 g / 0.67 dm³

Concentration ≈ 0.299 g/dm³ (rounded to three decimal places)

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Answer:

pH = - log [concentration]

pH = - log (0.0043M)

pH = 2.37

Answer:

If the density of the material is equal to the density of the material you have been working with it is possible that the samples are the samples

Explanation:

Density is an intensive property of the matter (Doesn't depends of its amount) that is widely used to identify a substance. Density is the ratio between the mass of the substance (In this case 25.62g) and the volume this amount occupies (21.9cm³). The density is:

25.62g / 21.9cm³ =

1.17g/cm³.

The new volume of the balloon after heating it to a temperature of 51 °C is approximately 2.39 L.

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

\(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Given that:

Substituting the given values and solve for V₂:

\(V_1T_2 = V_2T_1\\\\V_2 = \frac{V_1T_2}{T_1} \\\\V_2 = \frac{2.2\ *\ 324.15}{298.15 }\\ \\V_2 = 2.39 \ L\)

Therefore, the final volume is 2.39 litres.

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The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

There are 6

Explanation:

The significant figures in that number are  5 4 0 0 4 7

Hope this helps:)

Answer:

5H2 + 4NO = 2N2 +4H2O + H2

Explanation:

Reactants:

Five molecules that contains two hydrogen = 5H2

Four molecules that contains one nitrogen and one oxygen = 4NO

Products:

Two molecules that contains two nitrogen = 2N2

Four molecules that contains one oxygen and two hydrogen = H2O

One molecules that contains two hydrogen = 1H2 or H2

The balanced chemical equation for the reaction will be: 5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂, and there is no limiting reactant in this reaction.

To write the balanced chemical equation for the reaction, let's first identify the reactants and products based on the information provided:

Reactants:

5 molecules contain 2 white spheres (Hydrogen): 5 H₂

4 molecules contain 1 red (Oxygen) and 1 blue (Nitrogen) sphere: 4 NO

Products:

2 molecules contain 2 blue spheres (Nitrogen): 2 N₂

4 molecules contain 1 red (Oxygen) and 2 white (Hydrogen) spheres: 4 H₂O

1 molecule contains 2 white spheres (Hydrogen): 1 H₂

Now, let's write the balanced chemical equation by ensuring that the number of atoms of each element is the same on both sides of the equation:

Reactants: 5 H₂ + 4 NO

Products: 2 N₂ + 4 H₂O + 1 H₂

The balanced chemical equation for the reaction is:

5 H₂ + 4 NO → 2 N₂ + 4 H₂O + H₂

Now, let's determine the limiting reactant:

From the balanced equation, we can see that the stoichiometric ratio between H₂ and NO is 5:4. This means that for every 5 molecules of H₂, we need 4 molecules of NO for the reaction to proceed completely.

Since we have 5 molecules of H₂ and 4 molecules of NO, both reactants are present in the exact stoichiometric ratio required for the reaction. Therefore, neither H₂ nor NO is in excess, and both will be fully consumed during the reaction. As a result, there is no limiting reactant in this reaction.

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--The given question is incomplete, the complete question is

"Oxygen is represented by a red sphere. Nitrogen is represented by a blue sphere. Hydrogen is represented by a white sphere. In the reactants there are five molecules that contain two white spheres and four molecules that contains one red and one blue sphere. In the products there are two molecules that contain two blue spheres, four molecules that contain one red and two white spheres, and one molecule that contains two white spheres. What is the chemical formula for the limiting reactant in the reaction shown? chemical formula: Write the balanced chemical equation for the reaction, using lowest whole-number coefficients."--

The chemical formula O₂ which is oxygen is a molecule as it is made up  of 2 oxygen atoms.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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Answer:

b

Explanation:

suspension is the heterogenos solution

Answer: c) 0.185mol

Explanation:

First you need to create a balanced equation.

Al + O2 ---> Al2O3        (this is currently unbalanced)

When balanced, it is:

4Al + 3O2 ---> 2Al2O3

Then you need to find the limiting reactant (the way I do this is by taking both of them, doing dimensional analysis, and seeing which makes a smaller amount of product)

For Al:

10.0g Al * (1mol Al / 26.98g Al) * (2mol Al2O3 / 4mol Al) = 0.185mol Al2O3

For O2:

19.0g O2 * (1mol O2 / 32.00g O2) * (2mol Al2O3 / 3mol O2) = 0.396mol Al2O3

Since the amount of Al2O3 produced is smaller when using 10.0g Al, this is the limiting reactant and therefore the answer is 0.185mol Al2O3.

Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the  pH of a 0.01 M acetic acid.

Any hydrogen that comprises a material capable of giving a proton (a hydrogen ion) to another chemical is defined as acid. A base is indeed a molecule or ion that can receive a hydronium ion from just an acid.

1)Because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. The pH value of stronger acid is lower.

2)CH\(_3\)COOH + H\(_2\)O  ⇄ CH\(_3\)COO⁻+  H\(_3\)O⁺

 0.01             0               0

 -x              +x                +x

 0.01-x           +x        +x

Ka=[ CH\(_3\)COO⁻][H\(_3\)O⁺]/[CH\(_3\)COOH]

1.8×10⁻⁵ = [x][x ]/[  0.01-x ]

x=1.34×10⁻³

pH = -log[H⁺]

     =  -log[1.34×10⁻³]

     =2.88

Therefore, because HCl is a stronger acid than acetic acid, the pH of 0.01M acetic acid has greater value than the pH of 0.01M HCl. 2.88 is the   pH of a 0.01 M acetic acid.

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Answer:

\(1.000 \times {10}^{2} \)

The answer to your question are X-Rays.

We use this all the time when we have broken bones in our skeletal system!

Answer:

it would be x-rays

Explanation:

Answer:

I think the answer would be B, because there is still stuff past the known exception of out private solar system. (and all the other options don't discover anything.)

The difference in first ionization energy between Xe and Rn can be explained by the combination of differences in electron configuration and shielding effect.

The energy needed to remove one electron from an atom or ion is known as the initial ionization energy. The number of electrons in the atom and the arrangement of those electrons are two parameters that affect an element's ionization energy.

The electron configurations of the elements Rn (Radon) and Xe (Xenon) are similar, although Radon contains more electrons than Xenon. In contrast to the outermost electrons of Xenon, the outermost electrons of Radon are bound by the nucleus more securely and are therefore more difficult to remove. Because Xe has a lower initial ionization energy than Rn, it is simpler to remove one electron from Xe than from Rn.

Additionally, the shielding effect of inner electrons also affects the ionization energy. The shielding effect refers to the ability of inner electrons to screen or reduce the attraction between the nucleus and outer electrons. In Xe, there are more inner electrons than in Rn, which provides a stronger shielding effect, further reducing the ionization energy of Xe.

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Answer:

Cardiac muscle cells are located in the walls of the heart, appear striated, and are under involuntary control. Smooth muscle fibers are located in walls of hollow visceral organs, except the heart, appear spindle-shaped, and are also under involuntary control.

Explanation:

Answer:

reason is Heat is involved, the reaction is exothermic and therefore heat is lost to the surrounding

As an alternative, the following calculation may be made using the established conversion factor for a length measured in inches and converted to millimeters: 25.4 mm make up one inch.

In the formula atmospheric pressure = mercury density x gravitational acceleration x mercury column height, it can be calculated using mercury. The units of measurement for atmospheric pressure include atm, torr, mm Hg, psi, and Pa, where denotes the density of mercury, h the height of mercury, and PA the pressure at the area above mercury inside the tube (= 0). Pa equals 1 atm at sea level, and h is 76 cm. As a result, 1 atmosphere or 76 cm of mercury in a mercury barometer represents atmospheric pressure.

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