If the frequency of a wave is 68 hertz then the period of the wave is going to be

Answer:

a change in an atom's nunclues usually producing a different elements.

on the other hand, involved only a rearrangedment of electrons and do not involve change in the nuclie

Explanation:

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Answer:

See explanation

Explanation:

In considering the sustainability of the two processes, we must remember that fermentation involves the use of sugars as raw materials. These sugars are grown naturally as plants from which sugars are extracted for the fermentation process. This is a sustainable process because sugar is a renewable resource.

On the other hand, ethene is produced from the cracking of fractions obtained from distillation of natural gas and oil. Natural gas and oil are not renewable resources hence the process is not sustainable. The cracking of ethene requires a lot of energy compared to the fermentation of sugar.

As regards atom economy, the cracking of ethene, C2H4(g) + H2O(g) ------> C2H5OH(g) has a better atom economy compared to the fermentation of sugar; C6H12O6(aq) -------> 2C2H5OH(aq) + 2CO2(g).

Atom economy has to do with the process of designing reactions in such a way that atoms which are in the starting materials end up in the final product and not as waste materials.

Fermentation produces a waste material which is CO2 while the cracking of ethene produces no waste material. All atoms of the reactants are converted into atoms of products.

Hence, the cracking of ethene displays 100% atom economy. This implies that all reactant atoms are found in the desired product.

True.Soils in the aquic moisture regime, also known as Aquepts, are characterized by frequent saturation or flooding due to high groundwater tables or poor drainage.

These soils tend to have a high water content, making them soft and easy to compact, which is ideal for recreational paths and trails. Aquepts are also known for their high nutrient content, making them fertile and able to support a variety of plant life, including grasses, shrubs, and trees.

This plant growth helps stabilize the soil and reduce erosion, making it an even more suitable surface for recreational use. Additionally, the high water content of these soils means that they are more resistant to compaction and damage from foot traffic, further enhancing their suitability for paths and trails. Overall, the characteristics of soils in the aquic moisture regime make them well-suited for recreational use.

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Answer:

nitrogen

Explanation:

i really think it's nitrogen

The volumes according to the pH are as follows:(i) 5mL of 0.10 M CH₃COOH and 5mL 0.10 M CH₃COONa for pH 4.7(ii) 0.91mL of 0.10 M CH₃COOH and 9.09mL 0.10 M CH₃COONa pH 5.7

Calculating the volume of chemicals needed:

Given that pKa of acetic acid, CH₃COOH = 4.7

The pH of a buffer using the Henderson-Haselbach equation is given by:

pH = pKa + log [A⁻] / [HA]

For the acetic buffer,

pH = 4.7 + log [CH₃COONa] / [ CH₃COOH]

4.7 = 4.7 + log [CH₃COONa] / [ CH₃COOH]

0 = log [CH₃COONa] / [ CH₃COOH]

taking antilog on both sides of the equation we get:

1 = [CH₃COONa] / [CH₃COOH]

So,5mL of 0.10 M CH₃COOH and 5mL 0.10 M CH₃COONa makes a buffer of pH 4.7

Similarly:

5.7 = 4.7 + log [CH₃COONa] / [CH₃COOH]

1 = log [CH₃COONa] / [CH₃COOH]

taking antilog on both sides of the equation we get:

10 = [CH₃COONa] / [CH₃COOH]

10[CH₃COOH] = [CH₃COONa]

It implies that we need 10 times [CH₃COONa] as much of [CH₃COOH]

To prepare 10 mL of buffer, so:

10mL=  [CH₃COONa] + [CH₃COOH]

10mL = 11[CH₃COOH]

[CH₃COOH] = 0.91mL

So, [CH₃COONa] = 10mL - 0.91mL

[CH₃COONa] = 9.09mL

Therefore,0.91mL of 0.10 M CH3COOH and 9.09mL 0.10 M CH3COONa is required to make a buffer of pH 5.7.

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At 400 K, the free energy change (ΔG) for the reaction is 53.0 kcal. The total cost of producing 5,000 units is $50,250.

To find ΔG at 400 K using the Gibbs-Helmholtz equation, we need to substitute the given values of ΔH and ΔS into the equation.

ΔG = ΔH - TΔS

Given;

ΔH = 61.0 kcal

ΔS = 0.020 kcal/K

T = 400 K

Substituting these values into the equation;

ΔG = 61.0 kcal - (400 K)(0.020 kcal/K)

ΔG = 61.0 kcal - 8.0 kcal

ΔG = 53.0 kcal

Therefore, at 400 K, the free energy change (ΔG) for the reaction is 53.0 kcal.

To find the total cost of producing 5,000 units using the cost equation y = 10x + 250, we need to substitute x = 5,000 into the equation.

y = 10x + 250

Given;

x = 5,000

Substituting x = 5,000 into the equation:

y = 10(5,000) + 250

y = 50,000 + 250

y = 50,250

Therefore, the total cost of producing 5,000 units is $50,250.

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Answer:

Explanation:

Answer:

B. Secondary pollutant

Explanation:

A primary pollutant is directly emitted into the atmosphere. Volcano eruptions and emissions from cars can result in primary pollutants in the air.

Secondary pollutants are not directly put in the atmosphere. They are created when two or more primary pollutants in the atmosphere react. One example is smog.

Another example is acid rain. If sulphur dioxide, nitrogen dioxide and water react, then acid rain is formed. Therefore, acid rain must be a secondary pollutant.

The best answer choice is B. secondary pollutant

Answer:

The answer is B second pollutant

Explanation:

Acid rain occurs when sulfur dioxide in the atmosphere is oxidized in the presence. Acid rain occurs when sulfur dioxide in the atmosphere is oxidized in the presence of nitrogen dioxide.

Both the Heisenberg uncertainty principle and the Schrödinger wave equation led to the concept of atomic orbitals, hence option D is correct.

The Heisenberg uncertainty principle claimed that it was impossible to know an electron's position and velocity at the same time. It gave rise to the notion that an electron would follow an orbital path, along which a general area could be identified.

It is defined as the presumption that a classical ensemble is susceptible to random momentum fluctuations of a strength that is dictated by and scales inversely with uncertainty in position.

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Answer:

26.4 L

Explanation:

O₂ + C₅H₈

Given: 80 g of C₅H₈

Find actual gram-formula mass of C₅H₈: 68 g

Create a proportion: 80 g/68 g = 1.176…

Find actual gram-formula mass of O₂: 16 g

Find new mass of O₂: 16 g * 1.176… = 19 g

Use dimensional analysis for conversion (see attachment).

Molar mass is greater in CuSO45H2O(s). Pentahydrate copper salt has a higher molar entropy because there are more energy microstates present.

The atomic radius and molar mass grow as one moves down the group, bringing the energy levels closer together as a result. As a result, as one moves down the group, both the number of energy microstates and the molar entropy rise. A substance's entropy rises as its molecular weight, complexity, and temperature rise. As the pressure or concentration decreases, the entropy likewise rises. Gas entropies are significantly higher than those of condensed phases. Compared to solids or liquids, gases have higher entropies because of their chaotic mobility. That implies that entropy will alter during a reaction in which the quantity of gas molecules present changes.

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Answer:

A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.

Explanation:

Answer:

5)0.53liters

6)1.634.6°c

Explanation:

\(using \: charles \: law \\ v1 \div t1 = v2 \div t2\)

5) v1=25liters, t1=12000°c. v2=?, t2=250°c

v2=(250×25)/12000

v2=6250/12000

v2=0.52liters

6)v1=130,v2=85, t1=2500, t2=?

t2=(85×2500)/130

t2=212500/130

t2= 1634.6°c

Answer:

10.2 mol

Explanation:

given,pressure=240kpa

volume=31L

temperature=87.65°c

req,mole=?

now we have the equation

pv=nRt

When,p=pressure

v=volume

n=moles

R=gas constant

t=temperature

gas constant(R)=8.314L.kpa/k.mol

solution

from the first equation we have an equation

n=pv/Rt

=240×31/8.314×87.65

=7440/728.72

=10.2 mol

Answer:

reverse osmosis

Explanation:

Water treatment is often complicated because it deals with the chemical makeup of the water, which varies widely. The first step is to determine what contaminants should be removed. Unfortunately, this is not always a straightforward process. Many contaminants make themselves known in obvious ways, such as iron or hydrogen sulfide, which can cause taste and odor issues. Other contaminants, such as arsenic or pesticides, are only uncovered through a sophisticated laboratory analysis.

It is important to test the water so that the right type of treatment system can be selected. Keep in mind, however, that more than one analysis may be necessary to get a baseline because water quality fluctuates. More information on possible contaminants in a specific area can be obtained by talking to residents, the local health department, the water department, or the state geological society. In addition, your laboratory should be able to recommend appropriate tests based on a customer’s concerns and the information provided about the water source. It is important not only to address customers’ concerns but also to educate them about potential contaminants they may not have considered.

Best describe table sugar is considered a pure substance is Sugar has the same chemical composition throughout

Table sugar is pure sucrose derived from sugar beet or sugar cane and sucrose is the disaccharide consisting of glucose and fructose and it is produced by green plant in the process of photosynthesis and since the chemical composition of sugar is definite and does not vary hence it is pure substance and table sugar refer to standard while white sugar that you see in your cooking baking or cup of tea at home and the scientific name foe table sugar is sucrose

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Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds

U has a total of six electrons. This corresponds to carbon (C). A is the second most common element in the atmosphere.

The second most common element in the atmosphere is oxygen (O). E is a noble gas.

Noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Based on the given options, E could be xenon (Xe).

S is an alkali metal.

Alkali metals include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Based on the given options, S could be sodium (Na).

O is a halogen.

Halogens include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). Based on the given options, O could be bromine (Br).

O has an atomic number larger than V but smaller than W.

Based on the periodic table, the atomic number of oxygen (O) is 8, which is larger than the atomic number of vanadium (V) (23) and smaller than the atomic number of tungsten (W) (74).

The charge on an L ion is +2.

The charge of +2 indicates that L must lose two electrons to form the ion. Based on the given options, L could be calcium (Ca).

C has five electrons in its outer energy fever.

Carbon (C) has four valence electrons, not five. This contradicts the given statement, so we need to revisit the deductions.

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Hydration is a specific example of the phenomenon known generally as a. solvation

The act of hydrating involves combining or dissolving an object in water. It is a particular instance of the more general phenomena known as solvation, which is the process by which solvent molecules surround and scatter a solute to create a homogeneous solution. However, hydration explicitly refers to solvation with water as the solvent.

Solvation may also happen with solvents other than water. Solvation is the process through which a solute and solvent interact to stabilise a solute species. Due to its impact on the solubility, reactivity, and behaviour of compounds in solution, solvation is a crucial mechanism in many chemical and biological processes.

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Answer:

A- SImilar to both copper and oxygen

Explanation:

If copper and oxygen react to form copper oxide, a compound of both Copper and Oxygen, they most likely have traits from both elements, therefore its A

According to the Planck-Einstein relation, the energy of a photon emitted with a wavelength of 448 nm is 4.44 × 10⁻¹⁹ J.

A photon is a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

A photon is emitted with a wavelength (λ) of 448 nm. Given the speed of light (c) is 3.00 × 10⁸ m/s, we can calculate the frequency (ν) of the photon using the following expression.

ν = c/λ

ν = (3.00 × 10⁸ m/s ) / (4.48 × 10⁻⁷ m) = 6.70 × 10¹⁴ s⁻¹

We will use the Planck-Einstein relation, being Planck's constant h = 6.63 × 10⁻³⁴ J.s.

E = h × ν

E = (6.63 × 10⁻³⁴ J.s) × (6.70 × 10¹⁴ s⁻¹) = 4.44 × 10⁻¹⁹ J

According to the Planck-Einstein relation, the energy of a photon emitted with a wavelength of 448 nm is 4.44 × 10⁻¹⁹ J.

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catalytic process, A Ni catalyst is required for amide and alcohol to make the right esters. hydroxide ion is a stronger nucleophile than either water or ethanol,

In general, catalytic activity is a chemical interaction between a catalyst and a reactant that yields chemical intermediates more readily able to react with one another or with another reactant to yield the desired end product. Catalysis is the process of accelerating a chemical reaction by adding a catalyst to it. Catalysts are unaffected by and are not destroyed by the reaction.

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I'm sorry, I cannot provide a specific answer without knowing the specific reactants involved in the reaction. Please provide more information.

Answer:

The triple bonds are the strongest and hence the shortest. Then comes double bonds which are of intermediate strength between the triple and single bonds. And finally the single bonds are weaker than the other two.

This way, Triple bonds are the shortest. Then comes double bonds. Finally, single bonds are the longest among the three.

The order of bond lengths is given as,

Triple bond < Double bond < Single bond

Sleet is a type of precipitation that is formed by water and snow that is usually partially molten.

Sleet consists of icy raindrops that hit the surface, that is, part of the precipitation is frozen and the other forms water droplets.

Therefore, we can conclude that sleet is a form of winter precipitation, in which rain and snow occur at the same time.

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Answer: C) Rain droplets

Explanation: Trust me.

(1) Islands are always surrounded by bodies of water, in this case oceans. These islands tend to have more 'stable climates' and 'smaller temperature fluctuations' due to the specific heat of water, which is quite high, 4180 J/kg C. The higher the specific heat, the more the energy needed to raise the temperature of the substance. Land requires less energy to raise it's temperature than water due to it's lower specific heat. Thus, islands tend to have more stable temperatures than regions surrounded by land.

(2) Based on the conditions provided, the thermochemical equation for the reaction should be:  

2NaHCO₃ (s) ---> Na₂CO₃ (s) + H₂O (g) + O₂ (g)

This is a decomposition reaction, as it explains that the baking soda breaks down into the products. All we had left to do is balance the equation, adding 2 as the coefficient of the reactant.

(3) Let's rewrite the given equations:

First chemical reaction: H₂(g) + F₂(g)  ---> 2HF(g), ΔH₁ = –537 kJ.

Second chemical reaction: C(s) + 2F₂(g) ---> CF₄(g), ΔH₂ = –680 kJ

Third chemical reaction: 2C(s) + 2H₂(g) ---> C₂H₄(g), ΔH₃ = +52.3 kJ.

Fourth chemical reaction: C₂H₄(g) + 6F₂(g) ---> 2CF₄(g) + 4HF(g), ΔH₄ = ?

Now the 'fourth chemical reaction' is the one in which we need to determine the enthalpy:

ΔH₄ = 2(ΔH₁) + 2(ΔH₂) - ΔH₃,

ΔH₄ = 2(–537) + 2(–680) - 52.3 = -2486.3 kJ