rank from smallest to largest
a) 5583 nm
b) 0.001 um
c) 100 cm
d)3.456 x 10^-9

Answer:

a. The Zn and HCl both retained their identity.

The weak bases are substances that cannot dissociate themselves completely. The reaction for quinoline at Kb 6.30 × 10⁻¹⁰ is given as C₉H₇N+H₂O ⇌ C₉H₇NH⁺ + OH⁻.

The base dissociation constant Kb is the representation of the equilibrium constant when the weak bases react and dissociate in water. Quinoline is a weak base and reacts with water as,

C₉H₇N + H₂O ⇌ C₉H₇NH⁺ + OH⁻

Here, Quinoline accepts a proton from the water. Water losses its hydrogen and form a hydroxide ion.

Therefore, the equation for the reaction is written as, C₉H₇N+H₂O ⇌ C₉H₇NH⁺ + OH⁻.

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Answer:

d) I, III, and IV

Explanation:

rust, copper oxidation, and percipitate from a chemical reaction are all, well, chemical reactions.

The amount of electricity the plant will use for aluminum production in 1 year is 102×10⁷ KWh of electricity

From the question given above, the following data were obtained:

The amount of electricity needed to produce the aluminum for 1 year can be obtained as illustrated below:

From the question given above,

1 Kg of Aluminum required 17 KWh of electricity

Therefore,

60000000 Kg of Aluminum will require = 60000000 × 17 = 102×10⁷ KWh of electricity

Thus, the amount of electricity needed to produce the aluminum for 1 year is 102×10⁷ KWh of electricity

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HAZWOPER training and certification recognize:

The correct option is both A and C

HAZWOPER (Hazardous Waste Operations and Emergency Response) training and certification recognize that a large number of victims (as much as 80%) in hazardous waste incidents or emergencies will self-present or be self-referred for medical treatment.

Additionally, HAZWOPER training acknowledges that victims may use any entrance they can access at a hospital, not just the emergency department entrance.

This is because individuals affected by hazardous materials may arrive at different areas of the hospital seeking medical assistance.

Therefore, option d. Both A and C are correct statements regarding the recognition of HAZWOPER training and certification.

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De-Broglie wavelength λ for wave association with object of mass m moving with velocity v is given by-

\(\boxed{\sf{\lambda = \frac{h}{mv}}}\)

Here, h = Planck constant( value ≈ 6.63 ×10-³⁴ joules second )

Putting Values -

λ = 6.63×10-³⁴/100×0.1

=>6.63×10-³⁴/10

=>6.63 × 10-³⁵ m

Thus, option (a) is correct.

Answer:

₰₮₤₳V₤

Explanation:

First you must calculate the number of moles in this solution, by rearranging the equation. No. Moles (mol) = Molarity (M) x Volume (L) = 0.5 x 2. = 1 mol.

For NaCl, the molar mass is 58.44 g/mol. Now we can use the rearranged equation. Mass (g) = No. Moles (mol) x Molar Mass (g/mol) = 1 x 58.44. = 58.44 g.

An acid–base titration is a method of quantitative analysis for determining the concentration of an acid or base by exactly neutralizing it with a standard solution of base or acid having known concentration. A pH indicator is used to monitor the progress of the acid–base reaction.

There is no change in the concentration of the reactants or the products.

When a reversible process reaches equilibrium,

The forward reaction rate is the same as the backward reaction rate.

The quantity of product being formed is therefore equal to the quantity of reactant being formed in a given amount of time.

Therefore, for a reversible reaction at equilibrium, both the reactant concentration and the product concentration are constant.

Indicators can be used to roughly determine the equivalence point of an acid-base titration as this colour shift only happens over a narrow pH range.

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The principle behind the acid-base titration is that at the equivalence point , is where the no. of moles of the OH⁻ and H⁺ is equals. . indicator is the dye that color depends on the acidity or the basicity of solution.

The principles in which the acid - base titration is based on is that at the equivalence point the number of the moles of the OH⁻  ions and the number of moles of the  H⁺ both are equals. in the neutralization reactions the acid and the base will react and form the salt and the water.

An indicator is the dye or the chemical substances the will indicates the nature of the acidic and the basic solution.

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Astatine : Halogen

Nitrogen : Nonmetal

Krypton : Noble gas

Chlorine : Halogen

Sulfur : Nonmetal

i just needed the points sorryyy

Answer:

single replacement

Explanation:

I took the test :)

Cl₂ + 2KI → 2KCl + I₂ is an example of single replacement reaction. Therefore, option D is correct.

A single-replacement reaction is a chemical reaction in which one element replaces by the another in a compound. The general equation is. A + BC ⇒ AC + B.

An example of a single replacement reaction occurs when the element potassium  reacts with water, then the colorless solid compound  potassium hydroxide formed, and hydrogen gas is release. The equation for this reaction is as follows:

2K + 2H2O ⇒ 2KOH + H.

There are three main types of single replacement reactions are metal replacement, hydrogen replacement and halogen replacement reaction.

Thus, option D is correct.

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Answer:

Orbiter

Explanation:

Space shuttles are made out of three main parts: rocket boosters, a fuel tank, and orbiter (the part that resembles an airplane

Scientists define energy as the ability to do work.

In physics, power is the quantitative asset this is transferred to a frame or to a physical system, recognizable inside the overall performance of labor and within the form of warmth and light. power is a conserved quantity the regulation of conservation of electricity states that power may be converted in shape, however not created or destroyed.

Strength is defined as the capacity to do paintings, that's the ability to exert pressure inflicting displacement of an object. in spite of this complicated definition, its means is quite simple: energy is simply the pressure that causes matters to move. energy is split into sorts capacity and kinetic.

Power exists in many special forms. Examples of those are mild energy, warmth power, mechanical electricity, gravitational energy, electric energy, sound strength, chemical power, nuclear or atomic strength, and so on. every form may be converted or changed into the opposite form.

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Answer:

pretty sure its B

Explanation:

Answer:

b :)

Explanation:

right on edge 2020

Answer:

1.44 × 10⁻⁶

Explanation:

Step 1: Given data

Step 2: Calculate the concentration of H⁺ ions

We will use the definition of pH.

pH = -log [H⁺]

[H⁺] = antilog -pH = antilog -2.88 = 1.32 × 10⁻³ M

Step 3: Calculate the acid dissociation constant of the acid (Ka)

For a weak monoprotic acid, we will use the following expression.

Ka = [H⁺]²/Ca

Ka = (1.32 × 10⁻³)²/1.21 = 1.44 × 10⁻⁶

Answer:

the second one filter for dissolved

Explanation:

Answer:

They filter the water for dissolved oxygen.

Explanation:

just took test

We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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Answer:

its sodium hydroxide

Explanation:

According to the provided orbital diagram, Hund's Rule looks to be the electron rule that is broken. According to Hund's rule, when degenerate orbitals with equal energy are accessible, electrons will first fill them individually before doing so in pairs.

While it should have been singly occupied in a distinct 2p orbital before partnering up, the second electron in the 2p orbital in the following diagram is paired with the first electron. Therefore, B. Hund's Rule is the appropriate response.

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Answer:

D

Explanation:

I'm not 100% sure on this but I am pretty confident that it's D or C I'm 98% sure it's D

The concentration of H2SO4 is  0.176 M. The number of moles of H2SO4 is 0.0165 moles.

The equation of the reaction is;

2KOH(aq) + H2SO4(aq) ------> K2SO4(aq) + H2O(l)

The number of moles of KOH = 1.85 g/56 g/mol = 0.033 moles

concentration = number of moles /volume

volume = 200 cm3 or 0.2 L

concentration of KOH = 0.033 moles/0.2 L = 0.165 M

From the titration formula;

CAVA/CBVB =na/nb

CA = concentration of acid

VA = volume of acid

CB = concentration of base

VB = volume of base

na = number of moles of acid

nb = number of moles of base

Making CA the subject of formula;

CA = CBVBna/VAnb

CA = ?

CB = 0.165 M

VA =  9.35 cm3

VB = 20.0 cm3

na = 1

nb =2

CA = CBVBna/VAnb

CA = 0.165 M ×  20.0 cm3  × 1/9.35 cm3 × 2

CA = 0.176 M

The concentration of sulphuric acid is 0.176 M

From the reaction equation;

2 moles of KOH reacts with 1 mole of H2SO4

0.033 moles of KOH reacts with 0.033 moles ×  1 mole/2 moles

= 0.0165 moles of H2SO4

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Answer:

B, 2.22×10^22 molecules

Explanation:

Given PV=nRT, n=PV/RT

n=103.7×1.0/8.314×(65+273.15)

= 0.0368858... moles

Given n= number of particles/avogadros number

number of particles=n×avogadros number

number of particles = 0.03688...×6.02x10^23

= 2.22×10^22 molecules

Answer:

A.

Explanation:

I just know.

Answer:

a.

Explanation:

Answer:

5 atoms

Explanation:

i hope that helps

The application of force in the direction of the motion of an object. The second scenario involves applying force to a moving item that is traveling in the opposite direction.

A force is an influence that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. A force has both a direction and a magnitude.

Force is used to describe a body's tendency to modify or change its state as a result of an external cause. When force is applied, the body can also alter its size, shape, and direction.

A push or pull that an object experiences as a result of interacting with another item is known as a force. Every time two items interact, a force is exerted on each of the objects. The force is no longer felt by the two objects when the interaction ends.

Thus, Force applied to an item in motion that originates in any direction constitutes the third situation where force is created.

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Answer:

The original volume of the concentrated solution was 182.7 mL.

To solve this problem, we can use the formula for dilution:

C1V1 = C2V2

Where C1 is the initial concentration, V1 is the initial volume, C2 is the final concentration, and V2 is the final volume.

We are given that the initial concentration (C1) is 2.3 M, the final concentration (C2) is 2.1 M, and the final volume (V2) is 191.8 mL. We want to find the initial volume (V1).

Plugging in the values we know into the dilution formula, we get:

(2.3 M) V1 = (2.1 M) (191.8 mL)

Simplifying this expression, we can solve for V1:

V1 = (2.1 M) (191.8 mL) / (2.3 M)

V1 = 182.7 mL

It's important to note that the units of concentration and volume must be consistent in this formula. In this case, the concentrations are given in units of M (moles per liter), and the volumes are given in units of mL (milliliters).

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The mitochondrion organelle is much like an engine because it powers the cell just like the engine powers a system.

The mitochondrion is one of the double membrane-bound organelles in the eukaryotic cell. It primarily functions as the cell's powerhouse by generating the energy necessary for metabolic reactions.

Oxidative respiration happens within the mitochondrion and energy in the form of ATP is generated for the use of the cell. This function is comparable to the engine of a vehicle which helps generate the necessary energy to drive the vehicle forward.

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