What’s the molar mass of lead(II) chloride

Answer:

Wood

Explanation:

Homes have been built with wood roofs for centuries, but wood roofs less common now than asphalt roofs. That makes choosing a wood roof for your custom home or as an option on a newly built home a distinctive look that can be timeless and offer an elegant or rustic aesthetic.

Answer:

The answer is B

Answer:

particulates and gases

Explanation:

The m/z value for the following compound can be determined by spectroscopic method.

How are spectroscopic method used to obtain the m/z values of a compound?

Spectroscopic methods are used to obtain the m/z values of a compound by analyzing the mass-to-charge ratio (m/z) of its ions. The most common spectroscopic method used to obtain m/z values is mass spectrometry (MS). In MS, a sample is ionized and then the resulting ions are separated and detected based on their m/z ratios. The m/z values of the ions can then be used to determine the molecular formula of the compound and its structure. Other spectroscopic methods such as nuclear magnetic resonance (NMR) spectroscopy and infrared (IR) spectroscopy can also provide information on a compound's structure, but they do not provide m/z values directly.

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The complete question and the structures for the fragments at each m/z value for the following compound is as follows:

Answer:

hello :3

A cold is a contagious upper respiratory infection that affects your nose, throat, sinuses and trachea (windpipe).

Explanation:

have a nice day :3

Answer:

Organelles are structures within a cell that perform specific functions like controlling cell growth and producing energy. Plant and animal cells can contain similar types of organelles. However, certain organelles can only be found in plant cells and certain organelles can only be found in animal cells.

It is more effective to perform an extraction with several small portions of solvent as opposed to one large portion of solvent of equal volume because the amount of the material left in the trash will be less.

The extraction of certain ratio of the solute is able to the distribute among the phases during each extraction. The various extractions with the lesser amounts of the solvent are more efficient than the single extraction with the huge amount of solvent.

The extraction is about to maximize the outside field of the communication between the two solvents, we can easily get the more surface area in the contact with the fewer amounts.

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The smallest subatomic particles, electrons are negatively charged and comprise an atom. Electrons are located in the area termed the electron cloud that surrounds the nucleus of an atom.

The set of primary particles that comprise an atom includes many other particles than the electron. Like other elementary particles, electrons can collide with other particles and, when they are diffracted, exhibit wavelike characteristics. The smallest subatomic particles, electrons are negatively charged and comprise an atom. A particle that makes up an atom is referred to as a subatomic particle in the physical sciences. According to the Standard Model of particle physics, a subatomic particle might either be a composite particle made up of other particles or it might not.

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The percent by mass of acetic acid in vinegar is 5%.

The percent by mass of acetic acid in vinegar can be calculated using the formula:

% by mass = (mass of solute ÷ mass of solution) × 100%

The mass of solute is mass of acetic acid, and mass of solution is the mass of vinegar.

For example, if we have 100 mL of vinegar, its mass would be 100 g.

Let's assume concentration of 5% acetic acid by mass.

This means that in 100 g of vinegar, 5 g is acetic acid. Therefore,  percent by mass of acetic acid in vinegar can be calculated as:

% by mass = (5 g ÷ 100 g) × 100% = 5%

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Answer:

Evaporation

Explanation:

Evaporation is the process of a liquid turning into its gaseous form. When a liquid hits its boiling point, it will evaporate and turn into gas. It can release vapor as well.

Answer:

The object has to move a distance when a force is applied to it

Explanation:

For work to be done on a body the force applied must move the body through a particular distance.

  Work done  = Force x distance  

If no distance is moved by the force, no work is done.

Also, the angle between the force and the distance must be 0 to do the maximum work on the body.

Answer:

solid(particles are rightly packed)

liquid(particles are losely packed)

gas(particles move freely)

Explanation:

there u go, hope it helps

The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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Answer:

See explanation

Explanation:

The principle of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another. Hence, chemical energy in a battery can be converted to electrical energy.

Usually, the conversion of energy from one form to another is not 100% efficient according to the second law of thermodynamics. Some energy is wasted in the process, sometimes as heat.

Hence, in an ideal situation where no heat energy is produced; all the chemical energy is converted to electrical energy (100% energy conversion). There will be no energy loss if no heat is produced.

Answer:

5.77x10^-7 m or 577 nm (nanometers)

Explanation:

The wavelength, λ, and frequency, ν, of light are described by the equation:

c = λν

where c is the speed of light.  

c = 3.0x10^8 m/s

v = 5.2x10^14

λ = c/v

λ = (3.0x10^8 m/s)/(5.2x10^14) = 5.77x10^-7 m

since 1 m = 10^9nm, we can express this as 577 nm (nanometers)

577 nm.  This is in the yellow light span of wavelengths.

Answer:

I'm not sure myself but I'd say mass since it's a solid

The density of the unknown solid is approximately 109.864 lb/ft³. To convert the density from grams per cubic centimeter (g/cm³) to pounds per cubic foot (lb/ft³), we need to use appropriate conversion factors.

1 gram is equal to 0.00220462 pounds, and 1 cubic centimeter is equal to 0.0000353147 cubic feet.

First, let's convert the density from g/cm³ to kg/m³. Since 1 kg is equal to 1000 grams and 1 cubic meter is equal to 1,000,000 cubic centimeters, we can use the following conversion:

Density in kg/m³ = Density in g/cm³ × 1000 kg/m³ ÷ 1 g/cm³

Density in kg/m³ = 18.5 g/cm³ × 1000 kg/m³ ÷ 1 g/cm³ = 18500 kg/m³

Now, let's convert the density from kg/m³ to lb/ft³. Since 1 kilogram is equal to 2.20462 pounds and 1 cubic meter is equal to 35.3147 cubic feet, we can use the following conversion:

Density in lb/ft³ = Density in kg/m³ × 2.20462 lb/ft³ ÷ 1 kg/m³ ÷ 35.3147 ft³/m³

Density in lb/ft³ = 18500 kg/m³ × 2.20462 lb/ft³ ÷ 1 kg/m³ ÷ 35.3147 ft³/m³ ≈ 109.864 lb/ft³

Therefore, the density of the unknown solid is approximately 109.864 lb/ft³.

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The CEC for this soil sample is 675.2 cmol(+)/kg.

The % Base Saturation for this soil sample is approximately 136.62%.

The % Acid Saturation for this soil sample is approximately 60.55%.

To    calculate the CEC, % Base Saturation (B.S.), and % Acid Saturation for the given soil sample:

a. Calculation of CEC (Cation Exchange Capacity):

CEC is the sum of exchangeable cations in the soil. From the given results, we have:

CEC = Ca2+ + Mg2+ + K+ + Al3+

CEC = (100 mg/L + 45 mg/L + 85.5 mg/L + 94.2 mg/L) / (25 g / 1000)

CEC = 168.7 mg / (25 g / 1000)

CEC = 675.2 cmol(+)/kg

b. Calculation of % Base Saturation (B.S.):

% B.S. represents the percentage of CEC occupied by base cations. In this case, we consider Ca2+, Mg2+, and K+ as base cations. The formula to calculate % B.S. is:

% B.S. = (Ca2+ + Mg2+ + K+) / CEC * 100

% B.S. = (100 mg/L + 45 mg/L + 85.5 mg/L) / (168.7 cmol(+)/kg) * 100

% B.S. = 230.5 mg / (168.7 cmol(+)/kg) * 100

% B.S. = 136.62%

c. Calculation of % Acid Saturation:

% Acid Saturation represents the percentage of CEC occupied by acid cations, in this case, H+ and Al3+. The formula to calculate % Acid Saturation is:

% Acid Saturation = (H+ + Al3+) / CEC * 100

% Acid Saturation = (8.0 mg/L + 94.2 mg/L) / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 102.2 mg / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 60.55%

Please note that the given values were in milligrams per liter (mg/L), and the CEC and % Saturation values were calculated assuming a conversion from mg/L to cmol(+)/kg using the mass of the soil sample (25 g).

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Answer:

yes

Explanation:

60/500 is less than 133/1000 meaning that the glucose will be able to disolve without a salute

Answer:

2.56 grams of H₂S is needed to produce 18.00g of PbS if the H2S is reacted with an  excess (unlimited) supply of Pb(CH₃COO)₂

Explanation:

The balanced reaction is:

Pb(CH₃COO)₂ + H₂S → 2 CH₃COOH + PbS

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) they react and produce:

In this case,  to know how many grams of H₂S are needed to produce 18.00 g of PbS, it is first necessary to know the molar mass of the compounds H₂S and PbS and then to know how much it reacts by stoichiometry. Being:

The molar mass of the compounds are:

So, by stoichiometry they react and are produced:

Then the following rule of three can be applied: if 239 grams of PbS are produced by stoichiometry from 34 grams of H₂S, 18 grams of PbS from how much mass of H₂S is produced?

\(mass of H_{2} S=\frac{18 grams of PbS*34 grams of H_{2}S }{239 grams of PbS}\)

mass of H₂S= 2.56 grams

2.56 grams of H₂S is needed to produce 18.00g of PbS if the H2S is reacted with an  excess (unlimited) supply of Pb(CH₃COO)₂

The minimum preflush volume (gallons of acid solution per foot of formation thickness) required is:Volume of preflush solution (gallons/ft) = 0.17045 x 33.45= 5.7 gallons/ft.

a. Dissolving power of HF/HCL mixture:For the given equation, the molecular weight of potassium feldspar is 278.4 and the specific gravity of HF (3% solution) is 1.152. Therefore, we can calculate the gravimetric dissolving power of HF/HCl mixture as follows:Weight of HF = 3/100 x 1 x 1000 = 30 g/LiterThe equation requires 14 moles of HF to dissolve 1 mole of orthoclase feldspar. Therefore, the number of moles of HF required to dissolve 3% of orthoclase feldspar is:(14/1) x (3/100) = 0.42 mole/Liter

The volume of HF required to dissolve 3% of orthoclase feldspar is therefore:Volume of HF = (0.42 x 20)/30 = 0.28 L/LiterThe gravimetric dissolving power of HF/HCl mixture is calculated as follows:Dissolving power = (MW of orthoclase feldspar)/(Volume of HF required to dissolve 3% orthoclase feldspar)Dissolving power = 278.4/0.28 = 994.28 g/Liter

The volumetric dissolving power of HF/HCl mixture is calculated as follows:Dissolving power = (MW of orthoclase feldspar)/(Number of moles of HF required to dissolve 3% orthoclase feldspar)Dissolving power = 278.4/(0.42 x 20) = 330.86 g/Literb. Minimum preflush volume (gallons of acid solution per foot of formation thickness) required:Given data:Porosity = 0.22Volume of calcite = 12%Volume of sandstone = 88%Volumetric ratio of acid to sandstone (S):A = 1 - 0.12 = 0.88B = 0.12S = 0.15/0.88 = 0.17045The radius of the wellbore (r) is 0.328 ft.The volume of the annular region that needs to be flushed = πr²h= 3.14 x 0.328² x 36= 12.61 cubic feetVolume of the sandstone = Volume of the annular region that needs to be flushed/porosity= 12.61/0.22= 57.32 cubic feetThe thickness of the sandstone layer (h) = Volume of sandstone/area of annular region that needs to be flushed= 57.32/(π(0.328)² - π(0.328-0.0625)²)= 33.45 ft

Therefore, the minimum preflush volume (gallons of acid solution per foot of formation thickness) required is:Volume of preflush solution (gallons/ft) = 0.17045 x 33.45= 5.7 gallons/ft.

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Answer:

hypothesis testing center of the year with 32 days

the Celsius temperature of 1.50 moles of ammonia contained in a 10.0 L vessel under a pressure of 2.0 atm is approximately -56.15 C. The closest answer choice to this value is -50 C.

To determine the Celsius temperature of 1.50 moles of ammonia contained in a 10.0 L vessel under a pressure of 2.0 atm, we can use the Ideal Gas Law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

T = PV/nR

T = (2.0 atm) x (10.0 L) / (1.50 moles x 0.08206 L atm/K mol)

T = 217 K

To convert this temperature to Celsius, we can simply subtract 273.15 K:

T(Celsius) = 217 K - 273.15

T(Celsius) = -56.15 C

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According to the mole concept, in 0.75 moles of lithium chromate there are 55.41 g of lithium.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

Number of moles=mass/molar mass, thus mass= 0.75×73.89=55.41 g.

Thus, in 0.75 moles of lithium chromate there are 55.41 g of lithium.

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Answer:

Barium, beryllium, and Strontium

Explanation:

These 3 elements are located in the same group, which determines the number of valence electrons.

The valence electrons determine how reactive an element will be.    

A. →barium

B. silicon

C. aluminum

D. →strontium

E.osmium

F. →beryllium

Hope that this helps! :) :) :) :) :)

Answer:

Hydorgen will.

Because hydrogen has 1 as valency.

A. a higher boiling point and a lower freezing point

Explanation:

hope this helps :)

Answer:

Ka = 9.2x10⁻⁷

Explanation:

The equilibrium of carbonic acid in water is:

H₂CO₃ ⇄ HCO₃⁻ + H⁺

Where Ka is defined as:

Ka = [HCO₃⁻] [H⁺] / [H₂CO₃]

The equilibrium concentration of the species is:

[H₂CO₃] = 1.9x10⁻² - X

[HCO₃⁻] = X

[H⁺] = X

As pH is -log[H⁺]

3.88 = -log[H⁺]

1.318x10⁻⁴ = [H⁺] = X

Replacing:

[H₂CO₃] = 1.9x10⁻² - 1.318x10⁻⁴ = 1.8868x10⁻²

[HCO₃⁻] = 1.318x10⁻⁴

[H⁺] = 1.318x10⁻⁴

Replacing in ka equation:

Ka = [1.318x10⁻⁴] [1.318x10⁻⁴] / [1.8868x10⁻²]

Answer: 9.2 x 10^-7

Explanation:

Answer:

I dont know what that is I just need points lol sorry

Answer:

1. metaphase

2. prophase

3. telophase

4. interphase

5. interphase

6. interphase

7. anaphase

8. interphase

(4,5,6,8 I'm not sure)

There are total three laws of newtons, first law of newtons, second law of newton and third law of newton. Therefore, for every action there is an equal and opposite reaction.

Newton's first law is also called law of inertia. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force.

Third law of newton states  that for every action there is an equal and opposite reaction.

Therefore, for every action there is an equal and opposite reaction.

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