Dilute the 6M NaOH to about 0.1M. Measure out the 6M NaOH with a pump dispensor. Do titrations to determine the purity (percent by mass) of potassium hydrogen phthalate in the unknown.

Crust it is literally called the continental crust

Answer:

C

Explanation:

electronic waves transmits energy but mechanical waves require a medium in order to transport their energy from bgg one place to another.

Answer:

it is B.) Electromagnetic waves vibrate in two directions that are

Explanation:

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The substance 'X' used for whitewashing is calcium oxide also known as quicklime. Its chemical formula is CaO.

Calcium oxide is formed by the thermal decomposition of calcium carbonate, found mainly in limestone, coral reefs, and seashells. It is used in various industrial processes.

When Calcium oxide(X)  is mixed with water, it undergoes an exothermic reaction and produces calcium hydroxide, also known as slaked lime.

The reaction of Calcium oxide(X) with water(H2O) is:

CaO + H2O → Ca(OH)2 + heat

The product formed is Ca(OH)2 known as Calcium hydroxide.

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Answer:

No.

Explanation:

No, convection does not occur if Earth's mantle were a box 30 km on a side because convection needs medium for the movement of heat energy from one place to another. Convection and conduction are two processes which needs medium for its movement while radiation does not need any medium for its movement. If there is a empty space present between two substances so convection does not occur.

When 0.0750 mol of chloroacetic acid and 0.0180 mol of sodium paients are combined with 1.00 l of water, the resulting solution has a pH of 2.373.

Stronger than acetic acid CH3-COOH is chloroacetic acid Cl-CH2-COOH. Cl is a group that removes electrons. By dispersing negatively charged by an inductive effect and stabilising the acetate anion, it makes acetic acid more acidic.

In chloroacetic acid, the Cl- ion has a -I effect that lowers the electron of the carboxylic group's O-H bond, whereas in acetic acid, the CH3 group has a +I impact that raises the O-H bond's electron density. Consequently, acetic acid is less acidic than chloroacetic acid.

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1 mole of sodium (Na) atoms has a mass of 22.99 g. Therefore, 15 g of sodium contains 6.67e23 atoms of sodium.

Atom is the smallest and most basic unit of matter. It consists of a nucleus, made of protons and neutrons, surrounded by electrons in a cloud-like structure. Atoms are the building blocks of all matter and are the basis for the development of chemistry and other sciences. Atoms can form chemical bonds with other atoms, resulting in molecules and compounds. Atoms are extremely small, and it takes an electron microscope to observe them. They are also incredibly light, with an average atom weighing only one-trillionth of a gram.

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Answer: sodium sulfide

Explanation:

The union of vinegar and bicarbonate produces carbon dioxide

The carbonic acid, which is weaker, in turn breaks down into water and carbon dioxide, which being volatile separates

will observe a yellow color, confirming that BASIC HYDROLYSIS has taken place. To the touch the bottle cools and in the end a white deposit may remain on the bottom.

The statement that describes a hydrogen bond is the bond between hydrogen in one water molecule and another hydrogen in a different water molecule. The correct option is b.

Hydrogen bonds are the bonds that are formed between water molecules and other molecules that join with hydrogen. These are weak bonds. This bond is formed between hydrogen atoms and other atoms.

One of the bonds that allow molecules to associate is the hydrogen bond. It happens when hydrogen forms a covalent bond with an element that is extremely electronegative, such as oxygen, nitrogen, or sulfur.

Thus, the correct option is b) the bond between hydrogen in one water molecule and another hydrogen in a different water molecule.

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The volume of the weather balloon after it rises to an altitude where the temperature is -8°C is 140.46 L.

An ideal gas is a theoretical gas composed of many randomly transferring factor particles that aren't difficult to interparticle interactions. the best gasoline idea is beneficial because it obeys the precise gas law, a simplified equation of country, and is amenable to evaluation under statistical mechanics.

Volume is a degree of occupied three-dimensional space. it's far more frequently quantified numerically the usage of SI-derived gadgets or by way of diverse imperial gadgets. The definition of length is interrelated with the extent.

An ideal gas is described as one for which both the extent of molecules and forces between the molecules are so small that they have got no effect on the behavior of the gas. The real gas that acts almost like a really perfect gasoline is helium. that is due to the fact helium, in contrast to maximum gases, exists as an unmarried atom, which makes the van der Waals dispersion forces as low as viable.

Using the ideal gas equation:-

Given;

V₁ = 150L

T₁ =  10°C = 283 K

V₂ = ?

T₂ = -8°C = 265 K

V₁/T₁ =V₂/T₂

V₂ = V₁T₂/T₁

     = 150 × 265 / 283

    = 140.46 L

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The reaction you are referring to involves the use of NaOH (sodium hydroxide), H2O (water), and heat with a phenol compound that has a double bond to an oxygen (O) atom, which is an aromatic ketone. In this reaction, the major organic product obtained is a phenol.

The presence of a strong base, NaOH, and heat causes the ketone to undergo a base-catalyzed alpha-hydroxylation reaction. The hydroxide ion (OH-) from NaOH attacks the alpha-carbon, forming a carbanion intermediate. The carbanion then reacts with water, which acts as a nucleophile, to form an alpha-hydroxyketone.

Subsequently, the alpha-hydroxyketone undergoes a tautomeric shift, a type of isomerization reaction. The tautomeric shift involves the movement of a proton and the migration of a double bond to form a more stable compound. In this case, the keto form (aromatic ketone) converts into its enol form (phenol).

The phenol is the major organic product in this reaction due to the increased stability provided by the aromatic ring and the hydrogen bonding capabilities of the hydroxyl group.

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Answer:

Chlorine is commonly used as an antiseptic and is used to make drinking water safe and to treat swimming pools. Large amounts of chlorine are used in many industrial processes, such as in the production of paper products, plastics, dyes, textiles, medicines, antiseptics, insecticides, solvents and paints.

Explanation:

hope this helped you

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Answer:

1. Examples of biotic factors would be the animals, insects, algae, and plant life.

2. Examples of abiotic factors would be the air temperature, weather, ponds, and lakes, etc.

The biotic factors are living organisms in the environment and abiotic factors are non-living things in the environment including the necessary sources for living.

The word biotic is came from bio means life. The living organisms in the nature are called biotic factors. Biotic factors are of diverse types of organisms living in various ecosystems.

There are different types of ecosystems such as forests, deserts, aquatic systems, marsh lands, grass lands etc. The organisms in each of these ecosystem have their own characteristics.

Each of these ecosystem are included of non -living things such as water sources, rocks, caves, etc. called abiotic factors. These abiotic factors are necessary for the survival of the biotic factors.

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Answer:

No

Explanation:

Droplets or aerosols. When an infected person coughs, sneezes, or talks, droplets or tiny particles called aerosols carry the virus into the air from their nose or mouth. Anyone who is within 6 feet of that person can breathe it into their lungs.

Airborne transmission. Research shows that the virus can live in the air for up to 3 hours. It can get into your lungs if someone who has it breathes out and you breathe that air in.

Surface transmission. Another way to catch the new coronavirus is when you touch surfaces that someone who has the virus has coughed or sneezed on. You may touch a countertop or doorknob that's contaminated and then touch your nose, mouth, or eyes. The virus can live on surfaces like plastic and stainless steel for 2 to 3 days. To stop it, clean and disinfect all counters, knobs, and other surfaces you and your family touch several times a day.

Fecal-oral. Studies also suggest that virus particles can be found in infected people's poop. But experts aren't sure whether the infection can spread through contact with an infected person's stool. If that person uses the bathroom and doesn't wash their hands, they could infect things and people that they touch.

Answer:

0.75 atm

Explanation:

To convert from mmHg to atm, divide the value by 760.

570/760=0.7500 atm

The volume of gas when the pressure goes from 1.0 atm to 1.4 atm is 8,571.43 L.

When a car is driven into the river, it will implode due to the change in pressure. We are to calculate the volume of gas when the pressure goes from 1.0 atm to 1.4 atm if the internal volume of the car is 12,000 L.In order to solve the problem, we will use the combined gas law equation. The equation is given as follows;P1V1/T1 = P2V2/T2where P1 is the initial pressure, V1 is the initial volume, T1 is the initial temperature, P2 is the final pressure, V2 is the final volume, and T2 is the final temperature.We will assume that the initial temperature and final temperature are constant, and therefore, we can cancel them from the equation. Thus, the equation becomes;P1V1 = P2V2We can rearrange the equation to solve for V2 as follows;V2 = (P1V1)/P2Substituting the given values, we get;V2 = (1.0 atm * 12,000 L)/1.4 atmV2 = 8,571.43 L.

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The chirality or handedness character of most standard amino acids causes solutions of amino acids to rotate the plane of polarized light.


The chirality of an amino acid refers to the fact that it has a central carbon atom (alpha carbon) bonded to four different groups: an amino group (-NH2), a carboxyl group (-COOH), a hydrogen atom (-H), and a side chain (R group). This asymmetric arrangement creates a mirror image of the molecule, resulting in two possible configurations called enantiomers: L and D forms.  

When a beam of polarized light passes through a solution of amino acids, the molecules interact with the light and rotate the plane of polarization. This phenomenon is known as optical activity. The direction and degree of rotation depend on the specific amino acid and its concentration in the solution.  

In summary, the chirality or handedness character of most standard amino acids causes solutions of amino acids to rotate the plane of polarized light due to their asymmetric structure.

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Answer:

I think the answer is 275 grams TiO2

Explanation:

So multiply: 1.25 mol TiO2 times 220.38 = 275.475

So I rounded it to 275 grams and i hope that I helped you out

Answer:

D

Explanation:

Acidity is from 1-6

Neutral 7

Base 8-14

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.

b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.

In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.

a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.

This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.

b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.

Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.

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Answer:

\({ \rm{2H {}^{ + } _{(aq)} + CO {}^{2 - } _{3(aq)} \: \: \: {}^{ { \huge{\dashrightarrow} }} _{ \huge{ \dashleftarrow}} }} \: \: { \rm{H _{2} CO _{3(aq)} }}\)

The gravitational potential energy of the snowboarder standing at the edge of the 4.50 m high half pipe is approximately 2424.225 joules (J).

To find the gravitational potential energy of a snowboarder standing at the edge of a 4.50 m high half pipe, follow these steps:

1. Identify the given information:
  - Height (h) = 4.50 m
  - Mass (m) = 55.0 kg
2. Gravitational potential energy (GPE) can be calculated using the formula: GPE = m * g * h
  - g represents the acceleration due to gravity, which is approximately 9.81 m/s².
3. Plug in the values into the formula:
  - GPE = (55.0 kg) * (9.81 m/s²) * (4.50 m)
4. Perform the calculation:
  - GPE = 55.0 kg * 9.81 m/s² * 4.50 m = 2424.225 J

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Answer:

H2

Explanation:

on edge

Answer:

Hydrogen bonding is the major intermolecular attraction responsible for the relatively high boiling points of alcohols.

Answer:

The motion towards or away from us based on the Doppler effect and corresponding red shift or blue shift.

Explanation:

The emission and absorption spectra demonstrates the lines where light has been absorbed by the atoms. The spikes can be observed due to atoms releasing photons at those wavelengths. Infrared and ultra violet waves can be observed during spectroscopy.