58 grams of which substance can be dissolved in 100 grams of water at 50 Celsius?

Atomic absorption spectroscopy is an analytical technique that is used to determine the amount of a specific element in a sample. It works based on the principle of absorption of light of a particular wavelength by an element in the ground state when it is excited by a high-energy light source like a flame, an electrode or a laser.

As copper absorbs light of a specific wavelength, this technique can be used to quantify the amount of copper in the presence of other metal ions. The specificity of the method lies in the use of monochromatic radiation, which is only absorbed by copper, and the fact that the concentration of copper in the sample can be calculated based on the extent of light absorption by the sample. Typically, the sample is atomized and then exposed to a beam of light of a specific wavelength. As the light passes through the sample, it is absorbed by the atoms of copper present in the sample. The extent of absorption is measured by a detector, and the amount of copper in the sample is calculated using a calibration curve.

The calibration curve is generated by measuring the absorption of a series of standard solutions of known copper concentration. The presence of other metal ions does not interfere with the measurement of copper concentration by atomic absorption spectroscopy. The use of monochromatic radiation ensures that the light is absorbed only by copper, and the concentration of copper is calculated based on the extent of light absorption. Other metal ions in the sample do not absorb light of the specific wavelength used, and therefore do not contribute to the absorption measured by the detector.

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143.25 grams of Fe2O3 will be produced.

Mole is an SI unit used to measure the amount of any substance.

First we can use the stoichiometry of the reaction to find the amount of Fe2O3 that will be produced if a certain amount of SO2 is produced.

From the balanced equation, it can be seen that for every 4 moles of FeS2 that react, 2 moles of Fe2O3 are produced, and for every 8 moles of SO2 that are produced, 2 moles of Fe2O3 are also produced.

Since 3.5861 moles of SO2 are produced, we can calculate the number of moles of Fe2O3 produced by dividing by 8 and multiplying by 2:

3.5861 moles SO2 / 8 moles Fe2O3/8 moles SO2 * 2 moles Fe2O3/2 moles SO2 = 0.8965 moles Fe2O3.

Finally, to convert moles of Fe2O3 to grams, we multiply by its molar mass (159.69 g/mol).

0.8965 moles Fe2O3 * 159.69 g Fe2O3/1 mole Fe2O3 = 143.25 g Fe2O3.

So, 143.25 grams of Fe2O3 will be produced.

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The question which is most useful for determining the name of the acid HNO₃ is "Does the acid formula contain hydrogen?"

Thus, option D is correct.

Nitric acid, HNO₃ , is a kind οf acid. In water, it separates intο nitrate iοns (NO₃ -) and hydrοgen iοns (H+). Any substance that releases H+ in an aqueοus sοlutiοn is an acid, accοrding tο the definitiοn. Nitric acid falls within the categοry οf an acid because οf this.

Befοre and after the reactiοn, cοunt the hydrοgen atοms οn each cοmpοnent tο determine if it is an acid οr a basic. The acid is the substance if the number has drοpped. If there are mοre hydrοgens nοw, the substance is the base.

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a. The elemental forms with lower boiling points are:
- Hydrogen (H2) with a boiling point of 20.28 K
- Helium (He) with a boiling point of 4.22 K
- Nitrogen (N) with a boiling point of 77.36 K
- Oxygen (O) with a boiling point of 90.20 K
- Fluorine (F) with a boiling point of 85.03 K
- Neon (Ne) with a boiling point of 27.07 K

These elements have lower boiling points because they have weak van der Waals forces or London dispersion forces as the main type of interaction between their molecules or atoms.

b. The elemental forms with higher boiling points are:
- Lithium (Li(s)) with a boiling point of 1615 K
- Beryllium (Be(s)) with a boiling point of 2744 K
- Boron (B(s)) with a boiling point of 4273 K
- Carbon (C(s)) with a boiling point of 4098 K

These elements have higher boiling points because they have strong covalent bonds, ionic bonds, or metallic bonds as the main type of interaction between their atoms or ions.

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Answer:

Your answer will be *iron* as it is a element its number is 26

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

The shorthand electron configuration of a potassium ion (k ) is

[Ar] 4s1.

The shorthand electron configuration of a potassium ion (K+) is [Ar] 4s1. This means that the electron configuration is based on the electron configuration of Argon (Ar), which is a noble gas immediately preceding potassium in the periodic table. The electron configuration of Argon is [Ar] 3d10 4s2. To form a potassium ion, one electron is removed from the 4s orbital, leaving [Ar] 4s1. This is the shorthand electron configuration of a potassium ion.

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Answer:

\(\lambda=6.56x10^{-7}m\)

Explanation:

Hello there!

In this case, it possible to use the Rydberg equation in order to calculate the wavelength for this transition from n=3 to n=2 as shown below:

\(\frac{1}{\lambda} =R_H(\frac{1}{n_f^2}-\frac{1}{n_i^2} )\)

Thus, we plug in the corresponding energy levels and the Rydberg constant to obtain:

\(\frac{1}{\lambda} =10973731.6m^{-1}(\frac{1}{2^2}-\frac{1}{3^2} )\\\\\frac{1}{\lambda} =1524129.4m^{-1}\\\\\lambda=\frac{1}{1524129.4m^{-1}} \\\\\lambda=6.56x10^{-7}m\)

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The mass of sodium chloride that would be produced from 12 moles of magnesium chloride in the provided reaction would be 1404 g.

The AMU stands for "atomic mass unit," which is a unit of mass used in chemistry and physics to express the mass of atoms, molecules, and other particles on a very small scale. One atomic mass unit is defined as one-twelfth of the mass of a carbon-12 atom, which is approximately 1.66054 x 10^-27 kilograms. The AMU is a convenient unit to use when working with very small masses because it allows scientists to express them in more manageable numbers.

The balanced chemical equation is:

2 Na + MgCl2 → 2 NaCl + Mg

The molar mass of MgCl2 is:

MgCl2 = 24 g/mol (Mg) + 2 × 35.5 g/mol (Cl) = 95 g/mol

The stoichiometry of the reaction indicates that 1 mole of MgCl2 produces 2 moles of NaCl.

So, 12 moles of MgCl2 will produce:

2 moles NaCl/mol MgCl2 × 12 mol MgCl2 = 24 moles NaCl

The molar mass of NaCl is:

NaCl = 23 g/mol (Na) + 35.5 g/mol (Cl) = 58.5 g/mol

Therefore, the mass of NaCl produced from 12 moles of MgCl2 is:

24 moles NaCl × 58.5 g/mol NaCl = 1,404 g (or 1.404 kg).

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The molar mass of the unknown gas is approximately 11.33 g/mol.

Effusion refers to the process of a gas molecule escaping through a small hole into a vaccum. The rate at which a gas effuses is determined by its molar mass. The molar mass of an unknown gas that effuses twice as fast as methane (CH4) can be calculated using the following formula.Molar mass of unknown gas = (Molar mass of methane) ÷ (√2)Molar mass of methane can be calculated by adding the atomic masses of one carbon and four hydrogen atoms.Molar mass of methane = (1 × 12.01) + (4 × 1.01) = 16.05 g/molUsing the above formula,Molar mass of unknown gas = (16.05) ÷ (√2) ≈ 11.33 g/mol.

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Answer:

The answer is revolution  

Explanation:

Answer:

Explanation:

Distillation ; is used to separate solvent from its solution

Filtration ; is used to separate solid particle from a liquid

Evaporation is used to separate soluble solid from a solution

Answer:

Explanation:

Bohrium's most stable isotope, bohrium-270, has a half-life of about 1 minute. It decays into dubnium-266 through alpha decay. Since only a few atoms of bohrium have ever been made, there are currently no uses for bohrium outside of basic scientific research.

Answer:

look it up?

Explanation:

Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

The process involves of determining the density of the unknown substance.

The formula to determine density of any substance is given as:

Density = Mass / Volume.

Let's assume that we have to identify an unknown metal. we can determine the mass of the metal by using a scale. We can determine the volume of the metal by dropping the object into a graduated cylinder containing a known volume of water and measuring the new volume.

Hence, from this values of mass and volume density of the unknown metal can be determined easily. And then putting the density on the scale the unknown metal can be determined.

Hence, the process that allowed you to take measurements of mass and volume and determine the identity of the unknown metal is determination  of density.

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Answer:

The Answer is A. Scavengers

The release of additional flammable materials can be caused by a variety of factors, including sparks or flames from the initial fire, mechanical or electrical malfunctions, or other sources of ignition.

The release of additional flammable materials can be caused by a number of factors, including:

It is important to be aware of the potential sources of additional flammable materials in order to prevent secondary fires from occurring.

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Answer:

The solvent is the substance that dissolves solutes.

Explanation:

Solutes are the ones being dissolved. Examples could be sugar, salt, etc.

Solvents are the dissolver. Examples could be acids like HCl or water.

Answer:

A simple solution is basically two substances that are evenly mixed together. One of them is called the solute and the other is the solvent. A solute is the substance to be dissolved (sugar). The solvent is the one doing the dissolving (water).

A resting neuron is 4-5 times more permeable to potassium ions i.e K+ as there is a large number of open channels for the passage of ions.

At a normal resting period, the membrane is highly permeable to potassium ions (K+) because sodium ions are expelled out from the cells and potassium ions are forced inward the cell.

At this moment, the sodium-potassium gradient pump operates efficiently in order to exchange potassium inward and sodium outward the cell creating a potential gradient across the cell membrane. Moreover, in this case, the value of resting permeability of potassium ions is 1 as compared to sodium ions i.e. 0.4 much lower than potassium.

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"DNA only builds in the 5'-3' direction" means that the replication of DNA occurs in a specific direction, from the 5' end (the phosphate group) to the 3' end (the hydroxyl group) of each strand.

The leading strand is always 5'-3' because it is synthesized continuously in the direction of the replication fork. On the other hand, the lagging strand is not continuous and must be synthesized in fragments called Okazaki fragments, which are later joined together.

The lagging strand is 3'-5' because it is synthesized in the opposite direction to the leading strand. This is because DNA polymerase, the enzyme responsible for DNA replication, can only add nucleotides to the 3' end of a growing strand.

To replicate the lagging strand, the DNA must be synthesized in short fragments in the opposite direction to the replication fork and then joined together later.

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Answer: a truck crashes into a car

Explanation:

The truck drives in a wrong motion which makes the reaction of it crashing.

Answer:

A

Explanation:

N2 is nonpolar and has a triple covalent bond

Explanation:

B → Boron → Atomic number 5

Be → beryllium → Atomic number 4

B - Hybridization → 1S² 2S² 2P¹

\( \sf Boron - \boxed{↿↾} \: \boxed{↿↾} \: \boxed{ \small↾ }\huge\boxed{ }\huge\boxed{ }\)

Be - Hybridization → 1S² 2S²

\( \sf Beryllium →\boxed{↿↾} \: \boxed{↿↾} \: \huge\boxed{ }\huge\boxed{ }\huge\boxed{ }\)

from above data we can see that the outermost orbital of Beryllium i.e. 2S is fully filled & that of boron have 1 electron in 2P orbital. It will require more energy to remove one electron from beryllium Because it will disturb the stability, on other hand the boron will lose one electron easily to attain full filled outermost electron hence it will require less energy for 1st ionization.

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The combustion of 0.87 gallons of octane produces approximately 6.98 kg of CO₂ and 3.21 kg of H₂O.

To calculate the amount of CO₂ and H2O produced in the combustion of octane, we need to first convert the volume of octane from gallons to moles using its density and molar mass.

The density of octane is around 0.703 g/mL and its molar mass is 114.23 g/mol. One gallon is approximately 3.785 liters.

So, the amount of moles of octane in 0.87 gallons is:

moles of octane = (0.87 gallons) x (3.785 L/gallon) x (0.703 g/mL) / (114.23 g/mol) = 19.8 moles

The balanced chemical equation for the combustion of octane is:

2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O

From this equation, we see that 2 moles of octane reacts with 25 moles of oxygen to produce 16 moles of CO₂ and 18 moles of H₂O.

Using stoichiometry, we can calculate the amount of CO₂ and H₂O produced from 19.8 moles of octane:

To convert moles to grams, we can use the molar mass of each compound:

Therefore, the combustion of 0.87 gallons of octane produces approximately 6.98 kg of CO₂ and 3.21 kg of H₂O.

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Answer:

carbon 12 6 6

Explanation:

Answer:

SrF₂

Explanation:

The combining species are strontium and fluorine atoms.

 They form an ionic bond because strontium is a metal and it will lose two electrons. Two atoms of fluorine will take up each of the two electrons.

The electrostatic attraction between the two charged particles forms the bond;

                  Elements:

                        Sr                 F

Valency             2                 1

Exchange of

power                 1                 2

The compound is SrF₂

Answer:

\(C_{2}\)\(H_{6}\)O  This can be one of two componds:  ethanol or dimethyl ether.

Explanation:

I'm having trouble interpreting:

Η Η | | H—C-C-0-HHH

The manner in which a chemical structure is written plays a large roll in how to interpret what compund it is.  In this case we can count 2 carbons, 1 oxygen, and 6 hydrogens.

From this, we are tempted to quickly conclude and write:

\(C_{2}\)\(H_{6}\)O

and state that this is clearly ethanol.  Why would it be anything else?

Although this is a correct possible interpretation of the information, but \(C_{2}\)\(H_{6}\)O it has at least two different structures:  ethanol and dimethyl ether.  See the attached diagram.

Most combination of elements can have more than 1 structure, and are therefore different compounds.  Because if this, the manner in which the structure is drawn is essential to how it is interpreted.  Even the formula notation has certain rules designed to help identify the compound.  The attached diagram illustrates the two ways ethanol and dimethyl ether can be lav=belled:  C2H5OH, which highligts the -OH group and identifies it as an alcohol.  Dimethyl ether has the O atom at the end, without the H atom stuck behind it.  This signals that it is incorporated somewhere else in the molecule.

The rate of the forward and reverse reaction is equal is the property of a reaction that has reached equilibrium.

It is defined as the state of a system in which no net change in the concentration of the reactant and in the concentration of product occur. In chemical equilibrium forward and reverse reaction occurs at equal rates. All chemical reaction are not reversible.

The rate of the forward reaction and reverse reaction are equal in equilibrium.  

Reactant  ⇄  Product

Thus, from the above conclusion we can say that the The rate of the forward and reverse reaction is equal is the property of a reaction that has reached equilibrium.

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