what is the autoionization of water? autoionization of water is what is the autoionization of water?autoionization of water is a process where water acts as an acid and a base when it reacts with itself. a process where water acts as a base when it reacts with itself. a process where water acts as neither an acid nor a base when it reacts with itself. a process where water acts as an acid when it reacts with itself.

Answer: Answer is: 1s22s22p5.

1) Electron configuration 1s²1p⁶2d², this is not reasonable because 1p and 2d oritals do not exist.

2) Electron configuration 1s²2s⁴2p⁶, this is not reasonable because s orbitals only contain 2 electrons.

3) Electron configuration 1s²2s²2p⁵ is of an element fluorine. Fluorine (F) has atomic number 9, which means it has 9 protons and 9 electrons.

4) Electron configuration 1s²2s²2d⁶, this is not reasonable because 2d orbitals do not exist.

Answer:

Concept of chemi-fluorescence

Explanation:

A glow stick usually consists of two chemicals in a larger plastic tube: , a base catalyst (mostly sodium salicylate), and a suitable dye (sensitizer, or fluorophor). This creates an exergonic reaction when mixed together.

When a glow stick is bent, the flurophor which is a chemical that easily re-emits light upon excitation in smaller capsules is released into the other substance, there by causing it to emit radiation/light in the uv-visible region. The brightness and longevity of the glow stick is determined by varying the concentration of these chemicals.

I hope this explanation clarifies things.

Answer:

An earthquake happens by the child being born from fat mama

Explanation:

Metallic behavior correlates with large atomic size and low ionization energy. This is true. In metallic behavior, a metal atom tends to lose electrons easily and form positive ions. When these atoms are packed together in a solid metal, they form a lattice that consists of positively charged ions and free electrons, which are free to move throughout the lattice.

When atoms have low ionization energies, it is easier for them to lose electrons and become positive ions. So, large atomic size and low ionization energy can lead to metallic behavior. A larger atomic size means that there is more distance between the nucleus and the outermost electrons. This means that the valence electrons are not as strongly attracted to the nucleus, and it is easier for them to be removed. Low ionization energy means that the energy required to remove an electron from an atom is low. So, when an atom with low ionization energy is in contact with another atom, it tends to lose electrons easily and become a positive ion. This positive ion then attracts the electrons from the other atom, forming a metallic bond. Thus, metallic behavior correlates with large atomic size and low ionization energy. This is because these properties make it easier for metal atoms to lose electrons and become positive ions, leading to metallic bonding.

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Answer:

The screw with 10 wraps is the correct answer

Explanation:

The screw with 6 wraps would create a strong hold.

The strongest member of the family of wood screws is a lag screw. It is a reliable and sturdy fastener that frequently has a square head or an externally powered hex drive.

In general, lag screws are significantly stronger and heavier than standard wood screws. They have a tapered point and coarse threads.

Thus, The screw with 6 wraps would create a strong hold.

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Answer:

Below

Explanation:

From periodic table, fin mole-wt of bismuth = 208.98  g/mole

2.76 moles  *  208.98 g/mole = 577 g  ( 3 significant digits)

Francium, has a half-life of 22 minutes and decays alpha decay to radon, which then decays through alpha decay to polonium

The highly radioactive metal francium eventually transforms into a stable isotope of lead through a series of nuclear decays. The half-life of francium, the least stable and rarest of the alkali metals, is only 22 minutes. Alpha particles (helium nuclei) and beta particles are released as it degrades through a series of alpha and beta decays (electrons or positrons). The decay chain then continues through a number of alpha and beta decays until it eventually reaches lead-207, which is a stable isotope of lead. It is crucial to remember that francium is extremely rare and not present in large amounts in nature. It is created artificially in nuclear research facilities and is only used for that purpose.

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Answer:

437 g

Explanation:

as mass = density × volume

Answer:

Volume occupied is approx.  

38 ⋅ ML

Explanation:

Density  ρ = Mass  Volume  And thus  Volume  = Mass  ρ = 1.592 ⋅ l b × 454 ⋅ g ⋅ l b − 1 19.3 ⋅ g ⋅ m L − 1   =   ? ? ⋅ m L

Answer:

81 grams of Al

Explanation:

Relative atomic mass of Al = 27

Relative atomic mass in grams = Molar mass

∴ Molar mass of Al = 27g

That means; There's 27g of Al in 1 mole of Al.

1 mole ⇒ 27g

3.0 moles ⇒ 27 x 3.0 = 81g

Answer: Copper

Explanation: A material's ability to form thin sheets under pressure by hammering or rolling is called Malleability.Metallic bond is a term used to describe the collective sharing of a sea of valence electrons between several positively charged metal ions.Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions.A strong metallic bond will be the result of more delocalized electrons, which causes the effective nuclear charge on electrons on the cation to increase, in effect making the size of the cation smaller. Metallic bonds are strong and require a great deal of energy to break, and therefore metals have high melting and boiling points

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Answer:

1. H=2, O=1

2. H=4, O=2

3. C=1, O=1

4.

a. reactants C=1, O=2

b. products C=1, O=2

5.

a. reactants H=4, O=2

b. products H=4, O=2

6

a. reactants C=1, O=1, H=4

b. products C=1, O=1, H=4

Answer:

the answer is 383.0

hope it is helpful

Answer:

1. They are tightly bound, so they cannot vibrate and release radiation.

2. The molecule vibrates and releases infrared energy

3. No, this is incorrect because water vapor is a greenhouse gas and will increase the greenhouse effect.

4. The burning of fossil fuels causes both air pollution and water pollution

5. Chlorofluorocarbons

6. Sulfur dioxide and nitrous oxides

7. Initiating efforts to remove trash from oceans

8. nitrogen and phosphorus

9. an area in a waterway where no plants or animals live

10. Fewer microorganisms will grow on the surface of the lake

11. Using water and chemicals at high pressure to open up fissures to access oil and gas recourses

12. Climate change

13. The mines are operated adjacent to important waterways and are polluting them.

Explanation:

Answer:

#'s 1-13 above are correct here are tqo out of the three discussions

it won't let me submit #14-16

Steam turbine will do 150 J more useful work

Given the efficiency of both a steam turbine (40.0%) and a steam engine (25.0%), we can calculate the amount of useful work each device can do when provided with 1000 J of thermal energy.

For the steam turbine:
Efficiency = (Useful work output) / (Input energy)
0.4 = (Useful work output) / (1000 J)
Useful work output = 0.4 * 1000 J = 400 J

For the steam engine:
Efficiency = (Useful work output) / (Input energy)
0.25 = (Useful work output) / (1000 J)
Useful work output = 0.25 * 1000 J = 250 J

Now, we can find the difference in useful work between the two devices:
Difference = Useful work (steam turbine) - Useful work (steam engine)
Difference = 400 J - 250 J = 150 J

So, the steam turbine will do 150 J more useful work than the steam engine when provided with 1000 J of thermal energy.

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Taking into account the reaction stoichiometry, 5 moles of CO₂ can be formed from 1.25 mol butane and excess oxygen.

In first place, the balanced reaction is:

2 C₄H₁₀ + 13 O₂ → 8 CO₂ + 10 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 2 moles of C₄H₁₀ form 8 moles of CO₂, 1.25 moles of C₄H₁₀ form how many moles of CO₂?

\(moles of CO_{2} =\frac{1.25 moles of C_{4} H_{10}x8 moles of CO_{2}}{2 moles of C_{4} H_{10}}\)

moles of CO₂= 5 moles

Then, 5 moles of CO₂ can be formed from 1.25 mol butane and excess oxygen.

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The Lewis base that would predominantly give a substitution product when reacted with 2-bromopropane is NaCN (sodium cyanide).

In this case, the Lewis bases NaCN and NaOC(CH₃)₃ (sodium tert-butoxide) are potential nucleophiles that can react with 2-bromopropane, an alkyl halide. The reaction between a Lewis base and an alkyl halide can result in either a nucleophilic substitution or an elimination reaction.

Sodium cyanide (NaCN) is a stronger nucleophile compared to sodium tert-butoxide (NaOC(CH₃)₃). As a stronger nucleophile, NaCN is more likely to participate in a nucleophilic substitution reaction with 2-bromopropane. In this reaction, the nucleophile (CN⁻) would replace the bromine atom, resulting in a substitution product.

On the other hand, sodium tert-butoxide is a strong base and is more likely to undergo an elimination reaction (E2) with 2-bromopropane. In the E2 reaction, the tert-butoxide ion abstracts a proton from a carbon adjacent to the bromine, leading to the formation of a double bond and the elimination of the bromide ion. Therefore, NaCN would predominantly give a substitution product when reacted with 2-bromopropane.

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Answer

moles = 5.81 mol

Explanation

Given:

Volume = 144 L

AT SATP

1 mole = 24.4651 L

Solution:

1 mole = 24.4651 L

x mole = 144 L

x = 144/24.4651

x = 5.8 mol

A measure of intelligence based on shoe size for adults is likely to have a low  level of reliability and a high level of validity.

Option B is correct.

An age-adjusted indicator of intelligence is the intelligence quotient (IQ). The most widely used adult IQ test is the Wechsler Adult Intelligence Scale (WAIS). We oversee trial of knowledge to illuminate us about how well an understudy can think. We can better comprehend the corresponding academic performance strengths and weaknesses once we have identified the tasks on which a student performs well and those on which they perform poorly.

Because it does not take into account the significant cultural differences, it is impossible to quantify intelligence using a single biased method. A Western University professor named Adrian Owen carried out a study and came to the conclusion that a single test cannot accurately assess a person's cognitive performance.

Incomplete question :

A measure of intelligence based on shoe size for adults is likely to have a _________ level of reliability and a ____ level of validity.

A . low; low

B . low; high

C . high; low

D . high; high

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Answer:

A. manganese change from +7 to +2

Explanation:

Reduction means a gain of electrons, which means the oxidation number will go down or the charge goes down basically or become more negative charge. On the left, Mn has +7 in MnO4-. On the right, it has 2+, so it has been reduced.

Answer: \(K_p=\frac{[H_2]^4}{[CH_4]^1[H_2O]^2}\)

As value of K is greater than 1, the reaction is forward driven.

Explanation:

Equilibrium constant is defined as the ratio of concentration of products to the concentration of reactants each raised to the power their stoichiometric ratios. For equilibrium constant in terms of pressure , only gaseous reactants and products are considered.

For the given chemical reaction:

\(CaO(s)+CH_4(g)+2H_2O(g)\rightleftharpoons CaCO_3(s)+4H_2(g)\)

The expression for \(K_p\) is written as:

\(K_p=\frac{[H_2]^4}{[CH_4]^1[H_2O]^2}\)  

As > 1, the reaction will be favoured in the forward direction and thus more products will be there.

Answer:

Lattice energy is an estimate of the bond strength in ionic compounds. It is defined as the heat of formation for ions of opposite charge in the gas phase to combine into an ionic solid.

Explanation:

This is an example of a chemical change.

When sulfuric acid is combined with sugar, a chemical reaction occurs that produces gas and a black column. The gas and black column are new substances that were not present before the reaction took place. This indicates that a chemical change has occurred, as the substances have been transformed into something new with different properties.

Physical changes, on the other hand, involve a change in the form or appearance of a substance, but the substance itself remains unchanged. For example, crushing a rock into smaller pieces is a physical change, because the rock is still made up of the same substance, just in a different form.

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Taking into account the definition of density, the density of an 20.5 g sample of zinc metal and a volume of 5.5 cm³ is 3.72 g/cm³

Density is a scalar magnitude referring to the amount of mass in a certain volume of a substance or an object.

In other words, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that:

Replacing in the definition of density:

density= 20.5 g÷ 5.5 cm³

Solving:

density= 3.72 g/cm³

In summary, the density in this case is 3.72 g/cm³

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Answer:

31.607%....... . ...............

Answer:

give answer of following questions and get 35 points.

The sample volume of propane, a component of lp gas at STP, is 37.12L.

The combined gas law combines the principles of Gay-Lussac, Boyle, and Charles.

According to the combined gas equation, P1×V1/T1 = P2×V2/T2

Assuming the gas is an ideal gas will help us solve this problem. We can then apply the combined gas equation, P1×V1/T1 = P2×V2/T2.

Where,

P1 = initial pressure of the gas = 922 torr = 1.213 atm

P2 = final pressure of the gas at STP = 1 atm

V1 = initial volume of the gas = 35.3 L

V2 = at STP final volume of the gas  =?

T1 = initial temperature of the gas = 315 K

T2 = final temperature of the gas at STP = 273 K

By using the following equation and putting the given values, we obtain:

P1×V1/T1 = P2×V2/T2

Hence, V2 = P1×V1×T2 / T1×P2

V2 = 1.213×35.3×273 / 315×760

Therefore, the volume of the gas at STP is, 37.12 L

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