what distance does electromagnetic radiation travel in 0.38 ps ?

Explanation:

Plugging into the following equations will give you the answer (the answer is the attached image):

\(pH+pOH=14\)

\(pH=-log_{10}([H^+])\)

\(pOH=-log_{10}([OH^-])\)

\([H^+][OH^-]=10^{-14}\)

\([H^+]=10^{-pH}\)

\([OH^-]=10^{-pOH}\)

Answer:

fractional distillation

Explanation:

i hope its help you

Zinc sulfate is made by reacting an excess of zinc oxide with dilute sulfuric acid. The excess zinc oxide is then removed from the solution. Fractional distillation is used to obtain solid zinc sulfate from the solution.

Separating a mixture into its constituent parts, or fractions, is known as fractional distillation. By heating chemical mixtures to a temperature where one or more fractions of the mixture evaporate, chemical compounds are separated. Distillation is used to fractionate.

Different liquids can be extracted from a combination of liquids using fractional distillation. It is helpful for separating distinct fractions from crude oil, as well as for isolating ethanol from a combination of ethanol and water.

A method of separating a mixture of chemical substances is fractional distillation. This implies that each component of the combination, referred to as a "fraction," may be maintained separate from the other components. Boiling points for various compounds vary.

Thus, option D is correct.

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Answer: True?

Explanation: THere is no question but I do know that is true because I answers that on a test and got it right. It was asking about:

how many Helium and oxygen molecules = H2O = + O2

In a chemical equation, the formula of a substance in water solution is followed by the symbol. This statement is true.

The subscript (aq) following a molecule in a chemical equation indicates that it is aqueous. Aqueous solutions are those in which the solvent is water. Chemical reactions may be represented quickly using symbol equations. They demonstrate which atoms are involved and how they are linked together. Symbol equations are always in the form of reactants products. A + symbol denotes the separation of two or more reactants or products.

A response arrow simply indicates that something has changed and that one item has become another. The arrow leads from the old object (what responded) to the new thing (the thing that formed). An “equation of reaction” employs the reaction arrow.

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Due to its tiny size and high charge, lithium ion is most likely to combine with OH- to produce a soluble ionic molecule. Although they have a lower solubility, Ag+, Pb2+, Ni2+, and Zn2+ can also form ionic compounds.

With potassium cation  and hydroxide anion , the +1 charge already counterbalances the -1 charge, without the need for additional cations or anions. This indicates that to create a neutral chemical with the formula , one unit of each ion must be added.

When naming binary ionic compounds, the nonmetal anion (element stem + -ide) comes after the cation (specifying the charge, if necessary). Without employing prefixes, it is possible to tell from the compound name how many of each element are present.

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Answer:

the surface area of a solid reactant.

temperature.  

presence/absence of a catalyst.

Answer:

(CH₃COO)₂Ca(aq) + Na₂CO₃(aq) = 2CH₃COONa(aq) + CaCO₃(s)

2CH₃COO⁻ + Ca²⁺ + 2Na⁺ + CO₃²⁻ = 2CH₃COO⁻ + 2Na⁺ + CaCO₃

Ca²⁺ + CO₃²⁻ = CaCO₃

Answer: A

Explanation:

Extreme weather events follow normal climate patterns.

When a sodium atom transfers an electron to a chlorine atom, a chemical reaction occurs resulting in the formation of a sodium ion (Na+) and a chloride ion (Cl-).

This process is known as ionic bonding and is the result of the transfer of electrons from sodium to chlorine.

The reaction does not produce a new chemical compound or molecule, as this would require the combination of the two atoms with something else (e.g. oxygen, hydrogen, etc.).

This means that the reaction is not a chemical reaction, and so does not produce a new chemical compound or molecule.

In summary, when a sodium atom transfers an electron to a chlorine atom, ionic bonding occurs and the result is the formation of a sodium ion and a chloride ion. This process does not produce a new chemical compound or molecule.

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Answer:

1, 4, 5 are the correct answers

Explanation:

Hope this helps! :D

Answer:i don’t know

Explanation:i don’t know

Answer:

71.92 kPa

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (kPa)

P2 = final pressure (kPa)

V1 = initial volume (L)

V2 = final volume (L)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

T1 = 50°C = 50 + 273 = 323K

V1 = 105L

T2 = -25°C = -25 + 273 = 248K

P2 = 105.4 kPa

P1 = ?

V2 = 55.0 L

Using P1V1/T1 = P2V2/T2

P1 × 105/323 = 105.4 × 55/248

105P1/323 = 5797/248

0.325P1 = 23.375

P1 = 23.375 ÷ 0.325

P1 = 71.92 kPa

Explanation:

atoms will tend to completely fill their outer shells and will bond with other elements to accomplish this goal by sharing electrons, accepting electrons from another atom, or donating electrons to another atom.

Answer:

H2 +Cl2 → 2HCI

2KNO3 → 2KNO2 + 02

4Li + O2 → 2Li2O

4Fe + 3O2 → 2Fe2O3

Fe2O3 + 3CO → 2Fe + 3CO2

The generic equation Base + H₂O + HBase + OH⁻ may be used to explain the pH of solutions containing NH₃ or NaHCOO. Option 1 and 5 are correct.

The generic equation Base + H₂O + HBase + OH⁻ represents the autoionization of water, which occurs in all aqueous solutions. It involves the reaction between a weak base (B) and water to form the conjugate acid (BH⁺) and hydroxide ions (OH⁻):

B + H₂O ⇌ BH⁺ + OH⁻

Therefore, the equation is not specific to any particular salt, and it cannot be used to account for the pH of a specific salt.

However, some salts can affect the pH of an aqueous solution due to the hydrolysis reaction that occurs when they dissolve in water. Among the given salts, NH₃ and NaHCOO are basic and can cause the solution to have a higher pH, while KCIO₃, ZnCl₂, and BaBr₂ are neutral salts and do not affect the pH significantly.

Hence, 1.5. NH₃, NaHCOO are the correct options.

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The correct name for FeO is iron(II) oxide. Iron(II) oxide indicates that the iron ion in the compound has a +2 oxidation state.

The formula FeO consists of one iron atom with a +2 charge and one oxygen atom with a -2 charge. Therefore, the Roman numeral (II) is used to denote the oxidation state of iron.

Iron(II) oxide is commonly known as ferrous oxide. It is a black, powdery substance that occurs naturally as the mineral wüstite. It is used in various applications, including as a pigment in ceramics and as a catalyst in chemical reactions. Iron(II) oxide can also be produced by the reduction of iron(III) oxide with carbon monoxide at high temperatures.

It's worth noting that iron(III) oxide (Fe2O3) is another common iron oxide, commonly known as ferric oxide or rust. Iron monoxide (FeO) is not an accurate name for the compound since it implies a single atom of oxygen, which is not the case. Similarly, iron(I) oxide does not represent the correct oxidation state for iron in FeO.

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Answer:

net force depends upon the object and also the mass of that object

Answer:The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object.

Explanation:

We can you gauge the efficiency of the reaction carried out in the laboratory is by the percent yield.

The efficiency of the chemical reaction cab be the measured  by the percent yield of the reaction with  the value of the theoretical value. The theoretical value is the value that is estimated the amount of the product formed by the chemical reaction. The actual yield is the the laboratory concentration that is obtained from the chemical reaction. So, the percent yield is used to determine the efficiency.

Thus, The percent yield is the measurement  of the efficiency of the reaction that is carried out in the laboratory.

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Monoamines are a group of neurotransmitters and hormones that contain one amine group. Some common examples include dopamine, norepinephrine, epinephrine, serotonin, and histamine.

To indicate their chemical relationships:
1. Dopamine, norepinephrine, and epinephrine are all catecholamines. They are derived from the amino acid tyrosine and share a similar chemical structure.
2. Serotonin is an indolamine, which is derived from the amino acid tryptophan. It has a different chemical structure than catecholamines.
3. Histamine is derived from the amino acid histidine and has its own unique chemical structure, different from both catecholamines and indolamines.

In summary, the monoamines dopamine, norepinephrine, epinephrine, serotonin, and histamine have distinct chemical relationships. Dopamine, norepinephrine, and epinephrine are related as catecholamines, while serotonin is an indolamine, and histamine has a unique structure.

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Answer:

Chromatography?

Explanation:

When a pure sample is run next to a tested substance to check if it is a component in the mixture it is called a ;  Reference value

A reference value in a test is the average of repeated value gotten from laboratory measurements carried out in the lab using an accurate measurement tool. It is the bench mark value for which the value of any tested substance will be compared to.

Therefore to verify if a tested substance is a component in the mixture we have to run it next to a pure sample ( reference value ).

Hence we can conclude that When a pure sample is run next to a tested substance to check if it is a component in the mixture it is called a ;  Reference value

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When light is incident on the ion, wavelengths around 500 nm will be absorbed, and the remaining wavelengths will be transmitted or reflected. This provides insight into the electronic structure of the titanium(III) ion and its interaction with light.

The titanium(III) ion, [Ti(H2O)6]3+ in water, absorbs light that is centred around 500 nm. The colour of light absorbed by the ion can be inferred from the visible spectrum of electromagnetic radiation, which ranges from about 400 to 700 nm. Wavelengths around 400-450 nm appear violet, 450-495 nm blue, 495-570 nm green, 570-590 nm yellow, 590-620 nm orange, and 620-700 nm red. Since the titanium(III) ion absorbs light around 500 nm, we can infer that it absorbs light in the green portion of the visible spectrum. Therefore, the titanium(III) ion appears to be a green color.

The absorption of light by compounds can provide insight into the colour of the compound. When light is incident on a compound, certain wavelengths are absorbed, and the remaining wavelengths are transmitted or reflected. The absorbed wavelengths of light depend on the electronic structure of the compound. In the case of the titanium(III) ion, [Ti(H2O)6]3+, it is observed that light centered around 500 nm is absorbed. This means that the electronic structure of the ion allows it to absorb light in the green portion of the visible spectrum. Since the visible spectrum ranges from approximately 400 to 700 nm, it can be inferred that the titanium(III) ion appears to be green in colour. Therefore, when light is incident on the ion, wavelengths around 500 nm will be absorbed, and the remaining wavelengths will be transmitted or reflected. This provides insight into the electronic structure of the titanium(III) ion and its interaction with light.

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To calculate the concentration of acetic acid (vinegar) in the given sample, we can use the concept of titration and the balanced chemical equation for the reaction between acetic acid (CH3COOH) and sodium hydroxide (NaOH):

CH3COOH + NaOH → CH3COONa + H2O

Given:

Volume of sodium hydroxide used (VNaOH) = Final buret reading - Initial buret reading = 43.22 mL - 23.24 mL = 19.98 mL

Volume of acetic acid sample (Vsample) = 5.00 mL

Molarity of sodium hydroxide (MNaOH) = 0.019 M

Using the balanced chemical equation, we can see that the molar ratio between acetic acid and sodium hydroxide is 1:1. Therefore, the moles of sodium hydroxide used will be equal to the moles of acetic acid present in the sample.

1. Calculate the moles of sodium hydroxide used:

Moles of NaOH = Molarity of NaOH * Volume of NaOH used (in liters)

Moles of NaOH = 0.019 M * (19.98 mL / 1000 mL/L)

2. Calculate the moles of acetic acid:

Moles of CH3COOH = Moles of NaOH

3. Calculate the concentration of acetic acid in the sample:

Concentration of CH3COOH = Moles of CH3COOH / Volume of sample (in liters)

Concentration of CH3COOH = Moles of CH3COOH / (5.00 mL / 1000 mL/L)

Calculating the expressions:

Moles of NaOH = 0.019 M * (19.98 mL / 1000 mL/L) = 0.00037962 moles

Moles of CH3COOH = 0.00037962 moles

Concentration of CH3COOH = 0.00037962 moles / (5.00 mL / 1000 mL/L) = 0.075924 M

Therefore, the concentration of acetic acid (vinegar) in the given sample is approximately 0.075924 M.

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Answer:

aluminum

no aluminum is left over

Explanation:

the next answers for step 7 are 0.019, 0.0093, aluminum

Answer:

Aluminum because no aluminum is left over

Explanation:

Answer:

Explanation:

Here, we want to get the number of moles in the given number of molecules of Au

Mathematically:

1 mole of a substance has 6.02 * 10^23 molecules

The number of moles in 5.82 * 10^25 molecules would be the division as follows:

Approximately, there are 97 moles in the given number of molecules

The given question is incomplete. The complete question is:

How much heat is produced when 24.8 g of \(CH_4\) is burned in excess oxygen gas

Given: \(CH _4 +2O_2\rightarrow CO_2+2H_2O\)  ΔH= −802 kJ.

Answer: 1243.1 kJ

Explanation:

Heat of combustion is the amount of heat released on complete combustion of 1 mole of substance.

Given :

Amount of heat released on combustion of  1 mole of methane = 802 kJ kJ/mol

According to avogadro's law, 1 mole of every substance occupies 22.4 L at NTP, weighs equal to the molecular mass and contains avogadro's number \(6.023\times 10^{23}\) of particles.

1 mole of \(CH_4\) weighs = 16 g  

Thus we can say:  

16 g of \(CH_4\) on combustion releases heat = 802 kJ

Thus 24.8 g of \(CH_4\) on combustion releases =\(\frac{802}{16}\times 24.8=1243.1kJ\)

Thus heat released when 24.8 g of methane is burned in excess oxygen gas is 1243.1 kJ

Answer:

The third one

Explanation:

Nickel-62 has the highest binding energy per nucleon of any isotope for any element. Isotopes heavier than 62Ni cannot be formed by nuclear fusion without losing energy.

Answer:up

Explanation:

The correct formula for a compound formed from the elements Al and O is Al₂O₃.

Correct option is C.

Aluminum oxide is an oxide of aluminum with the chemical formula Al₂O₃ which is primarily composed of two chemically bonded aluminum and oxygen atoms. Aluminum oxide chemical compounds exist in various forms, with the most common being alpha, gamma, and theta.

The solid compound is an odorless, white powder which is insoluble in water and is a major component of the Earth's crust. It occurs naturally as corundum, bauxite, and cryolite and can be synthetically produced through burning aluminum metal or dissolving alumina tri-hydrate.

Aluminum oxide is widely used in a variety of applications due to its unique properties such as hardness, thermal conductivity, electrical conductivity, optical properties, and chemical inertness.

Correct option is C.

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