What are examples of evaporation?

The best description of cis-trans isomers is that they differ in their spatial arrangement around inflexible double bonds. This means that although they have the same number of atoms of the same elements and the covalent bonds between them, they differ in how those atoms are arranged around the double bond.

Cis-trans isomers best described as: They differ in their spatial arrangement around inflexible double bonds. These isomers have the same number of atoms of the same elements, but they differ in how the hydrogen and carbon atoms are arranged around the covalent bonds, specifically the inflexible double bonds. This difference in spatial arrangement results in unique chemical and physical properties for each isomer.

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Answer:

2H2O2 + NaClO → NaClO3 + 2H2O

Answer:

No one.

Explanation:

First of all, BPA does not appear to cause birth defects, but it may cause neural and behavioral effects.

The founder of BPA is Aleksandr Dianin ( Bisphenol A / Inventor, Russia ).

True, the greater the lattice energy, the greater the charges on the participatory ions and the smaller their radii.

Lattice energy is the term used to describe the energy created when two gaseous ions with opposing charges are drawn to one another and eventually form an ionic bond.

Due to the tight bonding of ionic bonds, lattice energy is always positive and typically has a brittle crystalline structure.

They are not easily deformed due to the presence of a strong electrical link, and because of the arrangement of ions, they melt at a very high temperature.

As lattice energy rises, ionic bond strength rises as well. Additionally, the size or radius of the ions as well as the charge of the ions affect the lattice energy.

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If calcium were to lose a proton from its nucleus, it would result in the formation of a new element with one less proton.

Calcium has 20 protons, which determines its atomic number and identity as an element. When an element loses a proton, its atomic number decreases by one, leading to the formation of a new element.

In this case, calcium losing a proton would result in an element with 19 protons, which corresponds to the element potassium (symbol K). Therefore, if calcium were to undergo extraordinary chemical processes that cause it to lose a proton, it would transform into the element potassium.

This hypothetical scenario highlights the fundamental connection between the number of protons and the identity of an element within the periodic table.

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Complete question :

If calcium were to lose a proton from its nucleus through extraordinary chemical processes, what element would it become?

Answer:

the answer is A

Explanation:

I took the test

Salinity of water is the total concentration of the salts present in unit volume of water. Ocean water in regions with high levels of precipitation has higher salinity. Hence option c is correct.

The salinity of sea water is expressed as a salt (in g) to liter of water ratio. Each liter of sea water contains around 35 grams of dissolved salts. It is spelled 35. The usual range of ocean salinity is 33-37 g/L.

There is a lot of rain in some places of the ocean. Freshwater poured to the surface dilutes the seawater, reduces salinity, and hence makes the seawater less dense. Near land, where rivers provide freshwater, seawater may be less saline.

The seawater near Antarctica has a low salinity of little about 34 ppt, and it is as low as 30 ppt in some spots around the Arctic. Regions where, the precipitation is higher have higher salinity in oceans.

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Answer:

12.70

Explanation:

For every iodate ion consumed by the reaction with iodine and acid, only 3 thiosulfate ions are consumed by reaction with iodine.

For every iodate ion consumed by the reaction with iodine and acid, 3 thiosulfate ions are consumed by reaction with iodine. This is because the balanced chemical equation for the reaction between iodate and thiosulfate is:
IO₃⁻ + 6S2O₃²⁻ + 6H+ → I⁻ + 3S₄O₆²⁻ + 3H₂O
As you can see, for every iodate ion (IO3-) consumed, 6 thiosulfate ions (S₂O₃²⁻) are consumed. However, in the reaction between iodine and thiosulfate, each molecule of thiosulfate (S₂O₃²⁻) can only react with one molecule of iodine (I2) according to the following balanced chemical equation:
2S₂O₃²⁻ + I2 → S₄O₆²⁻+ 2I⁻
Therefore, for every iodate ion consumed by the reaction with iodine and acid, only 3 thiosulfate ions are consumed by reaction with iodine.

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Answer:

0.025M

Explanation:

As you must see in your graph, each concentration of the experiment has an absorbance. Following the Beer-Lambert's law that states "The absorbance of a solution is directely proportional to its concentration".

At 0.35 of absorbance, the plot has a concentration of:

Age, heat, and magnetic orientation are distinct concepts in different domains:

Age: Age refers to the length of time that has passed since a particular event or the duration of existence of an object or organism. In the context of living organisms, age typically refers to the number of years that have elapsed since birth or a specific milestone. Age can be used to measure the maturity, development, or lifespan of individuals or entities.

Heat: Heat is a form of energy associated with the motion of particles within a substance. It is commonly understood as the transfer of thermal energy between objects or systems that have different temperatures. Heat can cause changes in temperature, state, or phase of a substance. It is typically measured in units such as joules or calories.

Magnetic orientation: Magnetic orientation refers to the alignment or positioning of an object or material with respect to a magnetic field. Certain materials, such as magnets or ferromagnetic substances, can be influenced by magnetic fields and exhibit specific orientations. Magnetic orientation is often studied in the context of magnetism, magnetic materials, and applications such as compasses, where objects align themselves with the Earth's magnetic field.

These concepts are distinct and unrelated to each other. Age pertains to time, heat pertains to energy transfer, and magnetic orientation pertains to the alignment of objects in a magnetic field.

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Answer:

it is oil.

Explanation:

it is oil because if water was written that would be wried so I think it is oil.

The concentration after 3.00 hours is 2.88 m.

To solve this problem, we will use the formula for the rate of a first-order reaction:

rate = k[A]

where k is the rate constant and [A] is the concentration of the reactant. We are given k = 0.02911(m/hr) and [A] = 3.13 m. We want to find the concentration after 3.00 hours, which we'll call [A'].

We can use the integrated rate law for a first-order reaction:

ln[A'] = -kt + ln[A]

where ln is the natural logarithm. Plugging in the given values, we get:

ln[A'] = -0.02911(m/hr) * 3.00 hr + ln[3.13 m]

Simplifying, we get:

ln[A'] = -0.08733 + 1.147

ln[A'] = 1.059

To solve for [A'], we'll take the inverse natural logarithm of both sides:

[A'] = e^(1.059)

[A'] = 2.884

Rounding to three significant figures, we get:

[A'] = 2.88 m

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The correct order of reactivity towards electrophilic aromatic substitution is:

b.) Phenol > benzene > chlorobenzene > benzoic acid

Phenol is more reactive than benzene towards electrophilic substitution reactions due to the presence of the -OH group (hydroxyl group) attached to the benzene ring. The lone pair of electrons on the oxygen atom in the -OH group can donate electron density to the ring, making it more nucleophilic and facilitating electrophilic attack.

Benzene, although less reactive than phenol, can still undergo electrophilic substitution reactions due to its aromaticity and delocalized electron system.

Chlorobenzene is less reactive than both phenol and benzene because the chlorine atom is an electron-withdrawing group. It withdraws electron density from the benzene ring, making it less nucleophilic and less prone to electrophilic substitution.

Benzoic acid is the least reactive among the options given. The carboxylic acid group (-COOH) is an even stronger electron-withdrawing group than the chlorine atom in chlorobenzene. It further reduces the electron density on the benzene ring, decreasing its reactivity towards electrophilic substitution.

Therefore, the correct order of reactivity towards electrophilic substitution is option b.

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the complete question is:

The correct order of reactivity towards electrophilic aromatic substitution is?

a.) Benzene > phenol > benzoic acid > chlorobenzene

b.) Phenol > benzene > chlorobenzene > benzoic acid

c.) Chlorobenzene > benzoic acid > phenol > benzene

d.) Benzoic acid > chlorobenzene > benzene > phenol

Therefore,  the addition of 14C-labeled UTP to the growth medium of cells will result in the labeling of RNA moles.

When 14C-labeled uridine triphosphate (UTP) is added to the growth medium of cells, the macromolecule that will primarily be labeled is RNA. Uridine triphosphate is a nucleotide that serves as a building block for RNA synthesis. Cells utilize UTP during the transcription process to incorporate uridine into newly synthesized RNA molecules.

The 14C label on UTP indicates the presence of a radioactive carbon isotope (carbon-14). As cells incorporate the labeled UTP into RNA molecules, the RNA strands will become labeled with carbon-14. This allows for the tracking and detection of newly synthesized RNA in the cell.

Phospholipids, DNA, and proteins are not directly synthesized using uridine triphosphate, and therefore they would not be labeled by the addition of 14C-labeled UTP. Phospholipids are primarily composed of glycerol and fatty acids, DNA is synthesized using deoxyribonucleotides, and proteins are synthesized using amino acids.

Therefore,  the addition of 14C-labeled UTP to the growth medium of cells will result in the labeling of RNA moles.

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Answer:

the molecular formula of Ozone is O_3.

Answer: O₃

Explanation:

The chemical formula of ozone is O3. In the earth's stratosphere, ozone is formed from a two-step reactive process. First, sunlight breaks apart an oxygen molecule (O2 you'll recall) into two oxygen atoms. In the second step, these oxygen atoms collide with another oxygen atom to make ozone.

Answer:

C

Explanation:

yes,

The probability of a hurricane forming in the northern hemisphere is about 36.4%.

To find the probability of a hurricane forming in the northern hemisphere, we need to use the formula for conditional probability. The formula is P(A|B) = P(A and B) / P(B), where A and B are two events.

In this case, the events are "hurricane forming" and "in the northern hemisphere". We can fill in the formula with the values from the two-way table:
P(hurricane | northern hemisphere) = P(hurricane and northern hemisphere) / P(northern hemisphere)

From the table, we see that there were 43 hurricanes that formed in the northern hemisphere. The total number of storms in the northern hemisphere is 75+43 = 118. Therefore:
P(hurricane | northern hemisphere) = 43/118

We can simplify this fraction by dividing the numerator and denominator by the greatest common factor of 43 and 118, which is 1. So:
P(hurricane | northern hemisphere) = 43/118 ≈ 0.3644

To express this as a percentage, we multiply by 100 and round to the nearest tenth:
P(hurricane | northern hemisphere) ≈ 36.4%

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Answer:

yaeh

Explanation:

a)Ca(OH)

2

​

+CO

2

​

⟶CaCO

3

​

+H

2

​

O

No. of atoms:Ca−1;O−4;H−2;C−1

b)Zn+AgNO

3

​

⟶ZnNO

3

​

+Ag

No. of atoms:Zn−1;Ag−1;N−1;O−3.

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

Answer:

The fact that there was no driving force or motive mechanism behind the theory of continental drift.

Explanation:

The concept of continental drift was first proposed by Abraham Ortelius in 1596, and further improved on by Alfred Wegener in 1912. The theory proposes that the earth's continents have moved across the ocean bed. The continents also move with geologic time relative to each other. The concept was not accepted by scientists because there was no driving force or motive mechanism to explain the theory.

A scientist named Alfred  Holmes, came up with the mantle convection theory which explains that the slow motion of the earth was caused by convection currents. This explanation was still not satisfactory to scientists. Today, the theory of plate tectonics has gained more acceptance than the theory of continental drift.

Answer:

B

Explanation:

Answer:Bunser buner

Explanation: It is meant to heat solid and liquid substance in the lab.

ANSWER

7 moles of MgO was produced during the reaction

EXPLNATION

Given that;

The number of moles of oxygen is 3.5 moles

Follow the steps below to find the number of moles of MgO

Step 1; Write a balanced equation of the reaction

In the equation above 2 moles Mg react with 1 mole oxygen to produce 2 moles MgO

Step 2; Find the number of moles of MgO using a stoichiometry ratio

Let x represents the number of moles of MgO

Therefore, 7 moles of MgO was produced during the reaction

Answer: Here u go!

Explanation:

Glucose reacts with methanol in the presence of HCl and gives α and β glucoside. Glucoside formation is due to the reaction of alcohol with glucoside -OH group of glucose. β, D glucose is forms β, D-methyl glucoside. In the same way, fructose forms fructoside. 2. Oxidation Glucose when treated with bromine water, forms gluconic acid.

Hope this helps!

According to the claim, the actual acid solution's concentration will be 0.38M.

Hydrobromic acid (HBr) used as a reservoir for bromine in practical syntheses. It is a strong acid that is used in aqueous solutions to make hydrobromination agents, electrolytes for energy storage, and catalysts for the synthesis of PTA and PETs, among other organic processes for pharmaceutical and agricultural use.

moles are equal to (0.5 M) * (150 ml / 1000 ml/L) = 0.075 moles.

Since there are 0.075 moles of HBr in the initial solution and the reaction is 1:1 (1 mole of KOH reacts with 1 mole of HBr),

The following formula can be used to determine the original HBr solution's concentration:

C = Mole/Volume

C is equal to 0.075 moles per (200/1000 ml/L)

C = 0.38 M

So, 0.38 M is the response (Option B).

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Using the change of base rule to find the logarithm to four decimal places. the correct answer is 11.4235.

To find the logarithm of 143.2 using the change of base rule, we can choose any base we prefer. Let's use base 10 and natural logarithm (base e) for this calculation.

First, we'll use the change of base formula, which states that log(base b) x = log(base c) x / log(base c) b. In this case, we'll calculate log(base 10) 143.2.

We'll use the natural logarithm (ln) as our intermediary step. The natural logarithm of 143.2 can be calculated as ln(143.2).

Using a calculator, we find that ln(143.2) is approximately 4.9628.

Next, we need to calculate log(base 10) e, which is the logarithm of e with base 10. Using a calculator, we find log(base 10) e is approximately 0.4343.

Finally, we apply the change of base formula:

log(base 10) 143.2 ≈ ln(143.2) / log(base 10) e
                ≈ 4.9628 / 0.4343
                ≈ 11.4235

Rounding to four decimal places, the logarithm of 143.2 using base 10 is approximately 11.4235.

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Explanation:

21. The given molecule for cracking is tetradecane.

On cracking it forms one mole of decane (C10H22) and two moles of ethene gas.

The chemical equation is shown below:

\(C_1_4H_3_0->C_1_0H_2_2+2C_2H_4\)

22. The essential condition for the formation of an ester is the reaction of alcohol and acid in presence of concentrated sulfuric acid.

Thus among the given options, the first option is the correct one.

23. Isomers of butanol are shown below:

It is 2-butanol.

The position of -OH group changes to the second carbon.

The mass in grams of 4.60 mol of nitrogen is 129g.

Mass of any substance will be calculated by using their moles as:

n = W/M, where

W = required mass

M = molar mass

Given molar mass of nitrogen (N₂) = 28.02 g/mol

Given moles of nitrogen (N₂) = 4.60 mole

On putting these values on the above equation and calculated for W, we get

W = (4.60 mol)(28.02 g/mol)

W = 128.89g = 129g

Hence the required mass is 129g.

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Answer:

D

Explanation:

After looking at answers I agree with the statement Chemistry is fun.

Answer:

Question 1:

Answer: True

• A nucleus comprises of "proton and neutron"

Question 2:

Answer: True

• Lithium atom has 3 protons while helium atom has 2 protons.

Question 3:

Answer: False

• Molecular compounds are formed when elements are combined be it metal or non-metal.

• A compound formed from a metal and non-metal is an ionic compound.

Question 4:

Answer: False

• Noble gases are inert / unreactive. They don't undergo any reaction because they are very stable.

Question 5:

Answer: True

Question 6:

Answer: False

\({ \rm{H _{2}O \: \dashrightarrow \: water}}\)

• The formular in the question is for hydrogen peroxide.

Question 7:

Answer: False

• What you have to know is that, molecular compounds such as halogens are made of discrete particles with weak vander waals forces of attraction, hence energy required to break these forces is quite low. Hence low melting points.

Question 8:

Answer: True

• Ionic compounds such as sodium chloride are highly soluble in water.

Question 9:

Answer: False

• Water is a polar covalent compound because it is formed due to hydrogen and covalent bonding. It is polar because oxygen is highly electronegative than hydrogen.

Question 10:

Answer: False

• Check answer for question 4

Question 11:

Answer: False

• They form charge of +1

Question 12:

Answer: True

• This are called radicals

Question 13:

Answer: False

• least reactive families are halogens and noble gases.

Question 14:

Answer: True

• This is a situation of ionic bonding.

Question 15:

Answer: False

• It is made up of 3 atoms.