Which of the following statements is/arel correct:
A. Entropy increases with the number of energetically equivalent ways to arrange the components of a system.
B. A given set of conditions such as P, V, T defines a microstate of a system.
C. The change represented below has a positive AS. 04
a. A only
b. A and C only
c. A and B only
d. A, B, and C

Answer:

19.3 mL

Explanation:

First we convert 0.128 g of chloroacetic acid into moles, using its molar mass:

As this acid is monoprotic, it requires the same number of moles of NaOH to be neutralized. This means that 1.354x10⁻³ moles of NaOH are required.

Now we calculate the volume of NaOH solution, using the given concentration and calculated number of moles:

We can convert liters into mL:

Answer:

c

Explanation:

fossil records

Answer:

A. CO₂

B. carbon dioxide

Explanation:

To determine the empirical formula of a compound, we need to follow a series of steps.

Step 1: Divide each mass percent by the atomic mass of the element

C: 27/12.01 = 2.25

O: 73/16.00 = 4.56

Step 2: Divide all the numbers by the smallest one, i.e., 2.25

C: 2.25/2.25 = 1

O: 4.56/2.25 ≈ 2

The empirical formula of the compound is CO₂. The name of this compound is carbon dioxide.

Answer:

1 , 2 , 3

Explanation:

Answer

Contributed by Paul Flowers, Klaus Theopold & Richard Langley et al.

General Chemistry at OpenStax CNX

Learning Objectives

Outline the general approach for the isolation of transition metals from natural sources

Describe typical physical and chemical properties of the transition metals

Identify simple compound classes for transition metals and describe their chemical properties

We have daily contact with many transition metals. Iron occurs everywhere—from the rings in your spiral notebook and the cutlery in your kitchen to automobiles, ships, buildings, and in the hemoglobin in your blood. Titanium is useful in the manufacture of lightweight, durable products such as bicycle frames, artificial hips, and jewelry. Chromium is useful as a protective plating on plumbing fixtures and automotive detailing.

Having a greater volume definitely means a lower concentration (molarity) of solution. So, the statement is true.

Molarity of a solution is defined as the number of moles of solute present per unit volume of solution.

Here,

Since, the number of moles of solute in one litre of solution is known as the molarity, we can say that the change in volume of the solution will affect the molarity of the solution.

Molarity, M = n/V

where n is the number of moles of solute and V is the volume of solution

From the equation, we can say that the molarity of the solution is inversely proportional to its volume.

We know that, molarity of a solution is a temperature dependent parameter.

As the volume of the solution increases, the temperature also increases( Volume [tex]\alpha[/tex] Temperature). When the temperature increases, it affects the molarity of the solution such that the number of moles remains constant and as a result of the increasing volume, the molarity decreases.

Hence,

Having a greater volume definitely means a lower concentration (molarity) of solution.

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Answer:

The alkaline hydrolysis of ester is known as saponification. When ester is heated with aqueous NaOH, sodium salt of acid and alcohol are formed.

The process of saponification of an ester in an alkaline solution. Alcohol and sodium salt of acid are created when the bis heated with aqueous NaOH.

Esters are converted into soap and alcohol through the process of saponification, which uses an aqueous alkali. Fatty acids, which are long-chain carboxylic acids, are the building blocks of soaps. Sodium stearate is a regular soap ingredient.

From the Latin sapo, which signifies soap, the reaction is known as a saponification. The term is derived from the fact that fats were once hydrolyzed into esters to produce soap.

Particularly in the food industry, saponification is significant because it makes it simpler to estimate the amount of free fatty acids present in a specific food product. The quantity of free fatty acid can be determined by measuring how much alkali was needed to neutralize the fat or oil.

Thus,the alkaline hydrolysis reaction of esters is called as saponification.

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Answer:

. multiple daughter cells are formed from one parent cell

Answer:

0.0922 M

Explanation:

The problem first states that the titration is made using NaOH, and later asks about the addition of KOH. I'm going to assume NaOH was used throughout the whole problem. The result does not change if it was KOH instead.

The reaction that takes place is:

First we calculate how many HClO₄ moles are there in the sample, using the given molarity and volume:

Then we calculate how many NaOH moles were added:

Now we calculate how many HClO₄ remained after the reaction:

As HClO₄ is a strong acid, 4.24 mmol HClO₄ = 4.24 mmol H⁺

Finally we calculate the molarity of H⁺, using the calculated number of moles and final volume:

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Answer:

635 nm

Explanation:

more simple answer

The correct option is (a) 635 nm.

Given,

          λ=6.36×10−7 m

       Let  C = the speed of light =3.00× [tex]10^{8}[/tex] m/s

         Let  f = the frequency = 4.72 × [tex]10^{14}[/tex] Hz

         Let  λ=  the unknown wavelength

Now apply formula of wavelength

                      λ = C /f

               λ = [tex]\frac{3.00 * 10^{8 }m/s }{4.72 * 10^{14} Hz}[/tex]

              λ = 6.36 × [tex]10^{-7}[/tex] m

                λ = 635 m

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Answer: 4.46 L

Explanation: By using Charles’s Law, we know that V1/T1=V2/T2. And whenever temperature is involved, you have to convert from Celsius to Kelvin (C° + 273). So, 4.00/ 24 +273 = V2/ 58 + 273. So the answer is, around 4.46 L.

Answer:

first choice

Explanation:

energy is written on the left side is its absorbed

2 elements came together so bonds are formed.

Answer:

[tex][PH_3]=0.30M[/tex] but see detailed explanation, please.

Explanation:

Hello there!

In this case, unfortunately, we are not given the rate constant but we can set up a reaction according to the information available on the internet:

[tex]4PH_3\rightarrow P_4+6H_2[/tex]

Whose rate constant is 0.0375/s. In such a way, it is possible infer that this is first-order reaction whose integrated rate law is:

[tex][PH_3]=[PH_3]_0exp(-kt)[/tex]

Thus, given the initial concentration, rate constant and elapsed time, the final concentration of PH3 would be:

[tex][PH_3]=(0.95M)exp(-30.50s*0.0375/s)\\\\[/tex]

[tex][PH_3]=0.30M[/tex]

However, it is important to keep in mind this result may vary according to your actual question.

Regards!

Answer: The pH of the substance is 8.25. The solution is basic.

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydronium ion concentration. The acids have pH ranging from 1 to 6.9 , salts have pH of 7 and bases have pH ranging from 7.1 to 14.

[tex]pH=-\log [H_3O^+][/tex]  

Putting in the values:

[tex]pH=-\log[5.6\times 10^{-9}][/tex]

[tex]pH=8.25[/tex]

Thus as pH is more than 7, the solution is basic.

The pH of the substance is 8.25. The solution is basic.

Answer:

chemical bonds

Explanation:

The atoms in chemical compounds are held together by attractive electrostatic interactions known as chemical bonds. Ionic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero. The ions are held together in a regular spatial arrangement by electrostatic forces.

D. Add an appropriate amount of sodium hydroxide.

Usually, chemical processes require an optimum pH. This is the pH at which the desired chemical conversion gives  the maximum yield.

As we can see, the pH of the system is much higher than the optimum pH. We can decrease the pH to the optimum pH of 5.0 by adding an appropriate amount of  a base such as NaOH.

Hence, the pH can be brought to 5.0 from 6.5 by adding an appropriate amount of NaOH.

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Vendors keep 'dry ice' in their ice cream boxes​ in order to prevent melting of dry ice.

Dry ice melts if it is placed in the open space because the carbondioxide gas is compressed with pressure. As carbon dioxide changes to gas, it escape to the atmosphere. If you use an airtight container such as ice cream box, the gas cannot escape.

So we can conclude that vendors keep 'dry ice' in their ice cream boxes​ in order to prevent melting of dry ice.

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Answer:

5.89 g × 10⁶ μg

Explanation:

Step 1: Convert 5.00 scruples to grains

We will use the conversion factor 1 scruple = 20 grains.

5.00 scruple × 20 grain/1 scruple = 100 grain

Step 2: Convert 100 grains to ounces

We will use the conversion factor 1 oz = 480 grains.

100 grain × 1 oz/480 grain = 0.208 oz

Step 3: Convert 0.208 oz to grams

We will use the conversion factor 1 oz = 28.34 g.

0.208 oz × 28.34 g/1 oz = 5.89 g

Step 4: Convert 5.89 g to micrograms

We will use the conversion factor 1 g = 10⁶ μg.

5.89 g × 10⁶ μg/1 g = 5.89 g × 10⁶ μg

The mass in micrograms of 5 scruples is 5.9×10⁶ μg

We'll begin by converting 5 scruples to grains.

1 scruple = 20 grains

Therefore,

5 scruples = 5 × 20

480 grains = 1 ounce

But

1 ounce = 28.34 g

Thus, we can say that

480 drains = 28.34 g

Therefore,

100 grains = (100 × 28.34) / 480

1 g = 1×10⁶ μg

Therefore,

5.9 g = 5.9 × 1×10⁶ μg

Therefore, 5 scruples is equivalent to 5.9×10⁶ μg

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Answer:

1.7 mL

Explanation:

start with formula M1V1=M2V2

then plug in values (3)V1=(100)(.05) and solve for V1

V1= 1.66

According to molar concentration, 1.7 ml of of 3 M NaOH is required to make 100 ml of of 0.05 M NaOH.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

In case of 2 solutions, molarity is determined as, M₁V₁=M₂V₂

Substitution of values gives, V₁=0.05×100/3=1.7 ml.

Thus, 1,7 ml of 3 M NaOH will be required to make 100 mL of 0.05 M NaOH.

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Answer: a. 50 kJ

Explanation: good luck

Answer:

a) 2f

B)CIO3+na

c)2NO2(g)

d)HSO3(h)

Explanation:

The sign of entropy depends on the number of gaseous substance in the system. In the first reaction, the number of gaseous particles increase in the product hence, randomness increases and thereby entropy is positive.

Entropy is a thermodynamic quantity which measures the randomness of the system. As the disorder in the system increases, the entropy increases and the entropy change is said to be positive in sign.

In the first reaction, in the product side, 2 moles of gaseous substance is formed, which increases the randomness, hence, entropy change is positive.

In the second reaction, the more ordered solid state is getting into less ordered aqueous state. Hence, S is positive.

For the third reaction, the number of moles of gas decreases from 3 to 2. Hence S is negative. For the last reaction, there is no change in number of moles or state of substance and no change in S.

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Answer:

Here ya go!

Explanation:

Answer:

the electrode at the center of a plasma ball emits a high-frequency,high-voltage alternating electric current. This current flows through the plasma filaments to create colorful tendrils of light.

Explanation:

what colors depend upon the gases used inside the plasma ball? common gases include neon, argon, xenon, and krypton.

In order to determine the objectives that you've accomplished, you should identify the steps required to test a hypothesis.

A scientific method refers to the various techniques and objectives that are adopted to observe, investigate, and study the natural world while giving explanations on the basis of the evidence, hypothesis, or factual information that are derived from a research work.

An effective and efficient way to accomplish your objectives during a research work include the following:

In conclusion, you should identify the steps required to test a hypothesis in order to determine the objectives that you've accomplished.

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Answer:  The chemical formula of the gas is Xenon.

Explanation:

From Graham's law of effusion rates, the rate of effusion of a gas is inversely proportional to the square root of its molar mass.

[tex]\frac{rate_1}{rate_2}=\sqrt{\frac{M_2}{M_1}}[/tex]

Given: Rate of unknown gas = [tex]0.392\times R_{Ne}[/tex]  

Putting the values in the formula:

[tex]\frac{rate_X}{rate_{Ne}}=\sqrt{\frac{M_{Ne}}{M_X}}[/tex]

[tex]0.392=\sqrt{\frac{20.17}{M_X}}[/tex]

Squaring both sides:

[tex]0.154=\frac{20.17}{M_X}[/tex]

[tex]M_X=131g/mol[/tex]

As Xenon (Xe) has molar mass of 131g/mol, Thus the chemical formula of the gas is Xenon.

Answer:

Its true

Explanation:

Hope it helps, have a great day!!!

Answer: C diamond has a different crystal structure from graphite

Explanation:

The difference between the properties of  two forms of carbon is that

Diamond has a crystal structure  different from graphite.

Graphite and Diamond are known as allotropes of Carbon as they have the

same chemical properties but different crystal structure.

Diamonds form a 3 crystal lattice with no flexibility while Graphite are

bonded to sheets which makes them slide easily within one another and

gives it its soft texture.

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