What’s the formula for sodium oxide

Answer:

there very old

Explanation:

Answer:

A is √34

Explanation:

We can solve for the hypotenuse "A" using the Pythagorean theorem.  

a²+b²=c²

3²+5²=c²

9+25=c²

34=c²

√c=√34

c=√34 --> A

The molarity of the hydrogen peroxide solution is calculated to be 0.367875 M.

To determine the molarity of the hydrogen peroxide solution, we can use the balanced chemical equation for the reaction between hydrogen peroxide and permanganate ion:

2MnO4– + 5H2O2 + 6H+ → 2Mn2+ + 5O2 + 8H2O

From the equation, we can see that the ratio of MnO4– to H2O2 is 2:5. Since it takes 13.5 mL of 0.109 M MnO4– to reach the equivalence point, we can calculate the moles of MnO4– used:

moles MnO4– = volume (L) × molarity (mol/L)

= 0.0135 L × 0.109 mol/L

= 0.0014715 mol

Using the ratio, we can calculate the moles of H2O2:

moles H2O2 = (moles MnO4–) × (5/2)

= 0.0014715 mol × (5/2)

= 0.00367875 mol

To find the molarity of the H2O2 solution, we divide the moles of H2O2 by the volume (in L) of the solution titrated:

molarity H2O2 = moles H2O2 / volume (L) = 0.00367875 mol / 0.010 L = 0.367875 M

Therefore, the molarity of the hydrogen peroxide solution is 0.367875 M.

In this question, we are given the volume and molarity of the permanganate ion solution used in the titration of hydrogen peroxide. We can use stoichiometry and the balanced chemical equation to determine the moles of hydrogen peroxide. By dividing the moles of hydrogen peroxide by the volume of the solution titrated, we can find the molarity of the hydrogen peroxide solution.

To begin, we calculate the moles of permanganate ion used by multiplying the volume (in L) of the solution titrated by its molarity. Next, we use the stoichiometric ratio from the balanced chemical equation to calculate the moles of hydrogen peroxide. The ratio shows that for every 2 moles of permanganate ion, there are 5 moles of hydrogen peroxide.

By multiplying the moles of permanganate ion by (5/2), we obtain the moles of hydrogen peroxide. Finally, we divide the moles of hydrogen peroxide by the volume (in L) of the hydrogen peroxide solution titrated to determine its molarity.

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Answer:

Hehe I don't know spanish -

Explanation:

Answer: If more than one variable is changed in an experiment, scientist cannot attribute the changes or differences in the results to one cause. By looking at and changing one variable at a time, the results can be directly attributed to the independent variable.

The contents of each layer are clearly labeled, with the reaction mixture containing the Nylon-6,10 monomers, the water layer containing the water-soluble initiator, and the oil layer containing the nonpolar solvent and the polymerized Nylon-6,10.  

The identity of each layer is indicated by the labeling of the solutions. The reaction mixture is labeled as layer 1, the water layer is labeled as layer 2, and the oil layer is labeled as layer 3.

An interfacial polymerization experiment to synthesize Nylon-6,10 typically involves the following steps:

Preparation of the reaction mixture: A solution of Nylon-6,10 monomers in a solvent is prepared. The monomers can be mixed in equal proportions or in different proportions to control the molecular weight and properties of the resulting polymer.

Preparation of the water layer: A separate solution of a water-soluble initiator is prepared. The initiator is added to the water, which is then stirred to create a homogeneous solution.

In this experiment, the contents and identity of each layer can be represented as follows:

The reaction mixture: A solution of Nylon-6,10 monomers in a solvent (layer 1)

The water layer: A solution of a water-soluble initiator (layer 2)

The oil layer: A solution of a nonpolar solvent, such as hexane (layer 3)

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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Answer:

Gas Evolving Reactions

Explanation:

In this reaction setup, lime water is poured into one of the test tubes and sealed with a stopper. A small amount of hydrochloric acid is carefully poured into the remaining test tube. ... As a result of the acid-carbonate reaction, carbon dioxide is produced and the lime water turns milky.

CaCO  

3(s)

​  

+2HCl  

(aq)

​  

→2NaCl  

(aq)

​  

+H  

2

​  

O  

(l)

​  

+CO  

2(g)

​

1) Because ΔH is positive, the reaction is endothermic.

2) Yes, absorbed, because in endothermic reaction heat is absorbed.

3) Heat will be released 26.9 KJ

Enthalpy depends only on the system's composition, temperature, and pressure; it is unaffected by the system's history. It is a quality or state function that resembles energy and has energy-like properties (and is thus measured in units of joules or ergs).

Given reaction is

2HgO(s) → 2Hg(l) + O₂(g)  ΔH = 182KJ

1) Because ΔH is positive, the reaction is endothermic.

2) Yes, because heat is absorbed during endothermic reactions.

3)  Heat will be released 26.9 KJ

According to the reaction,

2 moles HgO of release =  182 KJ heat

2×216.59 HgO release =  182 KJ heat

64 g HgO release =  182×64/2×216.59 KJ heat

64 g HgO release = 26.9 KJ.

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Complete question is attached below

The appropriate synthetic route is; Br₂ (bromine), H₂O (water), H₂O₂ (hydrogen peroxide), NaOH (sodium hydroxide).

To convert 5-methyl-1-hexene into 5-methylhexanal, the appropriate synthetic route would involve oxidation of the double bond followed by hydrolysis of the resulting intermediate. The correct sequence of steps would be:

Br₂ (bromine): Bromine adds across the double bond, resulting in the formation of 5-bromo-5-methylhexane.

H₂O (water): The bromine atom is replaced by a hydroxyl group (-OH) through a nucleophilic substitution reaction, forming 5-methylhexanol.

H₂O₂ (hydrogen peroxide), NaOH (sodium hydroxide): The oxidation of 5-methylhexanol using hydrogen peroxide in the presence of sodium hydroxide leads to the formation of 5-methylhexanal.

Therefore, the appropriate synthetic route is;

Br₂

H₂O

H₂O₂, NaOH

This sequence of steps allows the conversion of 5-methyl-1-hexene to 5-methylhexanal.

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A line graph can show information about two or more data sets and is useful to compare them. In this example, you can compare the change in the heart rate of the two boys. You will find the graph in the attached files.

As the statement says, the line graphs can be used to compare results.

It is basically a chart showing a line connecting many data points.

It must contain two axes

→ Y ax ⇒ Dependent variable ⇒ In this example, it is the heart rate values

→ X ax ⇒ Independent variable ⇒ In this example, it is the number of times the measurements were taken.

So in this example, data about the change in heart rate was taken from two boys, John and Thabo.

Note about the data table: Since I do not know which value belongs to each boy, I drow a new table. You should use the data of your table to make a new graph.

When making the graph, you will see the difference between the boys and how the heart rate fluctuated as measurements were taken.

You can make conclusions about your results that are easier to see in the graph.

For instance, according to the attached graph, we could say that,

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question we have

\(volume = \frac{1000}{13.6} \\ = 73.52941...\)

We have the final answer as

Hope this helps you

Answer:

Explanation:

3.81 m. = 150 inches.

I can't find explanation. Hope this is my best!

It represents a polypeptide chain that is broken down through a hydrolysis reaction.

The backbone of DNA contains deoxyribose while the backbone of RNA contains ribose. A covalent bond is formed between the carbon and nitrogen atoms to form H2OH2O. The hydrophilic phosphate groups of phospholipid molecules are attracted to the aqueous internal and external environment.

The shape and charge of the substrate match the active site of the enzyme. Because the substitution reduced the mass of the enzyme, the mutant enzyme bound the substrate more weakly than the normal enzyme. There is no visible effect on the structure of the CFTR protein. It leads to the synthesis of proteins that aid in cell replication. DNA is usually double-stranded, with both strands oriented parallel, whereas RNA is usually single-stranded.

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Disclaimer:- Your question is incomplete,please see below for the complete question.

polypeptides are continuously being formed and degraded. one of these processes is shown. the figure presents the molecular structures of polypeptides. a molecule at the top of the figure has a backbone with six repeats of the following atoms: n, c, c. one r group, of the range r 1 through r 6, is bonded with the first c of each the n, c, c repeats. an arrow that is joined by another arrow labeled h 2 o points to two shorter molecules, each with only three repeats of the atoms: n, c, c. one of the shorter molecules has r groups r 1, r 2, and r 3. the other molecule has r groups r 4, r 5, and r 6. figure 1. polypeptide reaction which statement is the most accurate description of the reaction shown in figure.

Answer:

A. Electrons all have approximately the same energy.

C. Electrons move freely among atoms (delocalized).

Next Question:

B. Electrons move among orbitals of different energies.

C. Electrons move freely among atoms (delocalized).

Explanation:

Electron sea model

Metallic Band theory

Conclusively, we can say Electron sea model

Metallic Band theory

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a. radon (Rn) is noble gas with atomic number 86 b. xenon (Xe) is noble gas with atomic number 54. c. neon (Ne) is noble gas with atomic number 10.

a) Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).

Electron configuration of francium atom:                                                   ₈₇Fr 1s²2s²2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 7s¹ or [Rn] 7s¹, radon (Rn) is noble gas with atomic number 86.

b) Mercury (Hg) is element with atomic number 80 (80 protons and 80 electrons). Electron configuration of mercury atom:                                                  ₈₀Hg 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² or [Xe] 4f¹⁴ 5d¹⁰ 6s², xenon (Xe) is noble gas with atomic number 54.

c) Silicon (Si) is element with atomic number 14 (14 protons and 14 electrons).Electron configuration of silicon atom: ₁₄Si 1s² 2s² 2p⁶ 3s² 3p² or [Ne] 3s² 3p², neon (Ne) is noble gas with atomic number 10.

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The difference between the atomic number and the mass number is atomic number is the total number of protons of an element, and atomic mass is the total number of neutrons and protons.

The nuclear charge number of an element is its atomic number. The total number of protons in the element's atoms serves as a representation of it.

The mass number of an element is often referred to as its atomic mass number and nucleon number. The mass numbers are the sum of the protons and neutrons.

The mass in protons and neutrons of an atom is expressed as a mass number, also referred to as an atomic mass unit. The atomic mass is the sum of the masses of all isotopes of a certain kind.

As a result, the atomic number of an element represents the total number of protons present, whereas the total number of neutrons and protons is represented by the atomic mass

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The Vrms, in meters per second, for helium atoms at 5.25 k is found to be 1233.9 m/s.

Following equation gives the root-mean-square (rms) speed of gas molecules:

v(rms) = √[(3kT) / (m)], Boltzmann constant is k, temperature in Kelvin is T, and molar mass of the gas in kilograms per mole is m. The molar mass of helium is 4.003 g/mol, or 0.004003 kg/mol. We can convert the temperature of 5.25 K to Kelvin by adding 273.15 K, giving a temperature of 278.4 K.

Plugging in the values, we get,

v(rms) = √[(3kT) / (m)]

v(rms) = √[(3 × 1.38 × 10⁻²³ J/K × 278.4 K) / (0.004003 kg/mol)]

v(rms) = 1233.9 m/s (rounded to four significant figures)

Therefore, the rms speed of helium atoms at 5.25 K is approximately 1233.9 m/s.

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According to this questions The mass number of the ion with 105 electrons, 157 neutrons, and a 1 charge is 262.

The mass number of an atom or ion is the total number of protons and neutrons in its nucleus. To determine the mass number, we need to know the number of protons (atomic number) and the number of neutrons.

Given:

Number of electrons = 105

Number of neutrons = 157

Charge of the ion = 1

Since the ion has a charge of 1, it indicates that one electron has been lost. Therefore, the number of protons (atomic number) can be calculated as:

Number of protons

= 105 - 1

= 104

The mass number is

= 104 + 157

= 261

Therefore, the mass number of the ion with 105 electrons, 157 neutrons, and a 1 charge is 261.

The ion with 105 electrons, 157 neutrons, and a 1 charge has a mass number of 261.

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Answer:

flagellum

Explanation:

flagellum is a long, whip-like structure that helps some single celled organisms move.

Answer:

flagellum

Explanation:

- A long whip-like structure used for locomotion (movement). Some bacteria have more than one flagellum. pili - (singular is pilus) Hair-like projections that allow bacterial cells to stick to surfaces and transfer DNA to one another.

The four types of crystals are ionic crystals, metallic crystals, covalent crystals, and molecular crystals.

Crystal, any solid material in which the component atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry.

An ionic crystal is a crystalline ionic compound. They are solids consisting of ions bound together by their electrostatic attraction into a regular lattice.

A crystalline solid in which the atoms are held together by metallic bonds. Metallic crystals are found in some interstitial compounds as well as in metals and alloys.

Covalent Crystals also called atomic crystals are the molecular solids in which the same or different atoms are joined together by covalent bonding.

Molecular crystals are substances that have relatively weak intermolecular binding, such as dry ice.

Thus, there are four types of crystals such as ionic crystals, metallic crystals, covalent crystals, and molecular crystals.

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According to the concept of solubility, the pH of saturated solution of calcium hydroxide is 9.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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The Tay-Sachs disease is an autosomal recessive genetic disorder that occurs in the Hexosaminidase A enzyme gene on chromosome 15q23-q24, resulting in a decrease in the hexosaminidase A activity.

This leads to the accumulation of GM2 ganglioside in the neurons of the central nervous system that causes mental and physical developmental delay in children, leading to death at an early age.

A single insertion mutation is caused in the HEXA gene in Tay-Sachs disease, which is the insertion of a cytosine in the coding sequence, which results in an alteration of the amino acid sequence. This alteration leads to the creation of a premature stop codon that truncates the HEXA gene translation prematurely, resulting in an unstable and truncated protein. The result is a deficient HEXA enzyme, resulting in Tay-Sachs disease.

The insertion of the cytosine nucleotide is responsible for changing the codon from CAG (glutamine) to CAC (histidine), which alters the amino acid at position 272 of the enzyme to histidine from glutamine. This single amino acid substitution is enough to cause disease manifestation

A single cytosine insertion mutation is caused in the HEXA gene in Tay-Sachs disease that alters the amino acid sequence, resulting in the creation of a premature stop codon, leading to an unstable and truncated protein. This alteration leads to deficient HEXA enzyme resulting in Tay-Sachs disease. The insertion of the cytosine nucleotide changes the codon from CAG (glutamine) to CAC (histidine), which changes the amino acid at position 272 of the enzyme to histidine from glutamine. This single amino acid substitution is enough to cause disease manifestation.

One amino acid is changed by the insertion mutation that leads to the alteration of the amino acid sequence in the Tay-Sachs disease. This change is enough to cause the disease manifestation that leads to the accumulation of GM2 ganglioside in the neurons of the central nervous system that results in mental and physical developmental delay in children, leading to death at an early age.

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Answer:

Physical state of reactants

Temperature

Concentration of reactants

Presence of a catalyst

Explanation:

The larger the surface area of a reactant, the faster the rate of the reaction. If the reactant is in powdered form, the reaction takes place faster than when the reactant is in solid or block form. This is due to the fact that the latter has larger surface area

Increase in temperature causes reactant molecules to gain kinetic energy thus increasing the rate if reaction

Answer:

The earth's crust is the thickest under high mountains.

Explanation: Continental crust

Answer:

you multiply it by the other subscripts in the parenthesis.

Explanation:

The pressure of the gas can be determined using ideal gas equation. The pressure of neon in the tank is 9.7 atm.

Ideal gas equations states the relation between volume, pressure, temperature and number of moles of gas as written below:

PV = nRT.

Where R is the universal gas constant equal to 0.082 L atm/K mol.

Given the volume of the tank  V = 10 L

number of moles n = 4 moles

temperature  = 22 ° C = 295 k

Then pressure P = nRT/V.

Pressure of neon gas = 4 moles × 295 K× 0.082 L atm/K mol /(10 L)

P = 9.7 atm.

Therefore, the pressure of the neon gas in the tank is 9.7 atm.

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Answer:  La Ferrassie 1

Explanation: La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found.

Answer:

If there were multiple products, we can take each product and mixed with a sample of a pure compound that we suspect might be the same as the product. Then, we taking the melting point of this mixture that contains one of our product and pure sample. Then, we can observe the change in melting point, if there is no change in melting point or the melting stays in the same range of the pure compound. Then, the that product along with the pure sample are actually the same compound, not a mixture of two compounds. However, if the melting point for our pure sample compound changed or didn't stay in the same range after the mixing with on of our products. then we can conclude that this product and the pure sample are completely different compound, and indeed they are a mixture.

Answer:

C5H12 + 8O2 → 6H2O + 5CO2

Explanation:

Pentane + Oxygen --> Water + Carbon dioxide

C5H12 + O2  --> H2O + CO2

The balanced equation is given as;

C5H12 + 8O2 → 6H2O + 5CO2

The principle is the law of conservation of matter that states that matter cannot be created nor destroyed. Hence, the reactants pretty much recombine to form the products.

The number of atoms remains conserved.