Aspirin is an uncharged acid with a pKa of 3.5. If aspirin is placed into a body fluid with a pH of 4.0, at equilibrium approximately what fraction will be in the ionized form? 24% 40% 55% 0 76% O 98%

Answer:

The correct answer is - \(\frac{P}{4}\).

Explanation:

By the ideal gas equation is PV=nRT, the relation between pressure and volume can be drive if the temperature remains constant:

At constant temperature, for a fixed amount of gas, P∝

so the pressure is inversely proportional to volume. Therefore, if the volume is increased in this condition the pressure will decrease in the same manner and A decrease in the volume will lead to an increase in pressure.

Volume increased here = four times = 4V

pressure is P will decrease four times = P/4

Answer: i dont no

Explanation:

ddd

The observation that compound A releases H2 gas while compound B does not when treated with Na metal can be explained by considering the structural differences between the two compounds and their ability to undergo specific reactions.

Compound A and compound B both have the molecular formula C₂H₆O, which indicates that they both contain two carbon atoms, six hydrogen atoms, and one oxygen atom. However, the difference lies in the arrangement of these atoms within the molecules. One possible explanation for the observed difference is that compound A is an alcohol, specifically ethanol (CH₃CH₂OH), while compound B is an ether, such as dimethyl ether (CH₃OCH₃). The presence of the hydroxyl group (-OH) in ethanol enables it to undergo a reaction with sodium metal, known as the metal-acid reaction. In this reaction, the metal displaces the hydrogen from the hydroxyl group, forming sodium ethoxide (CH₃CH₂ONa) and releasing hydrogen gas (H₂). On the other hand, ethers like dimethyl ether lack the hydroxyl group and therefore cannot undergo the metal-acid reaction. Consequently, when compound B is treated with sodium metal, no hydrogen gas is released. The ability of compound A to release hydrogen gas while compound B does not when treated with sodium metal can be attributed to the presence of a hydroxyl group in compound A (ethanol), enabling it to undergo a metal-acid reaction, whereas compound B (dimethyl ether) lacks the necessary functional group and thus does not undergo this reaction.

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Answer:

110k because 2 x 110 =220

There are 0.2107 moles of KBr are dissolved in 60.2 mL of a 3.50 M solution.

The molarity of a substance is defined as the number of moles of solute present in 1 litre of a solution.

According to the given data, the molarity of the solution tells us that there are 3.50 moles of KBr in 1000mL of solution. But we only have 60.2mL of solution, so with a mathematical rule of three we can calculate the amount of moles in 60.2mL:

1000 ml - 3.50 moles

60.2 ml -x = 60.2 ml× 3.50 moles/1000 ml

x= 60.2 ml -0.2107 moles

So, there are 0.2107 moles of KBr.

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Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

Standard state of the given equation will be:

Pb (s) + N2(g) + 3O2(g) --> Pb(NO3)2(s)

A chemical equation is a word used frequently in everyday chemistry. Jean Beguin, a French chemist, developed the first chemical equations in 1615. A chemical equation is simply a written representation of the process that occurs during a chemical reaction using numbers and symbols.

Explain:

Pb (NO3)2(s)

elements:

Pb, N, O

elemental states

Pb (s)   N2(g) , O2(g)

equation

Pb (s) + N2(g) + 3O2(g) --> Pb(NO3)2(s)

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I hope it helps you ❤️❤️❤️❤️

Answer:

Steam distillation is a separation process which purifies isolate temperature-sensitive materials, such as natural aromatic compounds. In steam distillation, dry steam is passed through the plant material. These vapours undergo condensation and collection in receivers.

distillation under pressure is used for the purification of those substance which get decompose on their boiling point. so , a suction pump (vaccum) is fitted with a beaker in order to lower it's pressure, due to which boiling pressure decreases. so that it can be distilled of before reaching to its boiling point.

Fractional distillation is a type of distillation which involves the separation of miscible liquids. The process involves repeated distillations and condensations and the mixture is usually separated into component parts. The separation happens when the mixture is heated at a certain temperature where fractions of the mixture start to vaporize.

Explanation:

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Answer:

digestive system, stomach, stomach lining, then the other one

Explanation:

According to the forces of attraction, water has highest boiling point as it possesses hydrogen bonding.

Forces of attraction is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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Balanced net ionic equation for this reaction is : Zn(s) + 2Ag⁺(aq) -> Zn²⁺(aq) + 2Ag(s)

Solid electric conductor that carries electric current into the non-metallic solids, liquids, gases , plasmas or vacuums is called a electrode.

To set up the cell, you will need:

Zn electrode (solid zinc metal) in 1.0 M aqueous Zn⁺ solution on left side

Ag electrode (solid silver metal) in 1.0 M aqueous Ag+ solution on right side

Salt bridge (such as a U-shaped tube filled with a solution of KCl or NaCl)

To set up the cell, connect the Zn electrode to negative (-) terminal of voltmeter and the Ag electrode to positive (+) terminal of voltmeter. Then, connect two electrodes with salt bridge.

Balanced net ionic equation for this reaction is: Zn(s) + 2Ag⁺(aq) -> Zn⁺(aq) + 2Ag(s)

This reaction involves oxidation of zinc (Zn) at Zn electrode, where Zn atoms lose electrons and form Zn⁺ ions: Zn(s) -> Zn²⁺(aq) + 2e⁻

Electrons flow through the external circuit to Ag electrode, where Ag⁺ ions are reduced to solid Ag atoms, gaining electrons: 2Ag⁺(aq) + 2e⁻ -> 2Ag(s)

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The average atomic mass of her sample is 114.54 amu

Let the 1st isotope be A

Let the 2nd isotope be B

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

The average atomic mass of the sample can be obtained as follow:

\(Average \: atomic \: mass \: = \frac{mass \: of \: A \times A\%}{100} + \frac{mass \: of \: B \times B\%}{100} \\ \\ Average \: atomic \: mass \: = \frac{113.6459\times 59.34}{100} + \frac{115.8488\times 40.66}{100} \\ \\ Average \: atomic \: mass \: = 114.54 \: amu \\ \\ \)

Thus, the average atomic mass of the sample is 114.54 amu

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Explanation:

Consider matrix A.

What is the inverse of A? Fill in the missing elements in the matrixs.Consider matrix A.

What is the inverse of A? Fill in the missing elements in the matrixs.

(2) 2.

Explanation:

2Al + 3CuSO4 → Al2(SO4)3 + 3Cu

Hence, now yet it's balanced chemical equation.

The body of scientific knowledge is based on different Observations (Option C).

Observations in the scientific method are fundamental because it is the first step to raising scientific questions that may be explained through plausible hypotheses. Subsequently, hypotheses must be tested by experimental procedures.

In conclusion, the body of scientific knowledge is based on different Observations (Option C).

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Answer:

ionic

Explanation:

the bonds that hold magnesium and oxygen together are formed between atoms that give electrons

The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.

Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :

k = 1/t ln (C0/Ct)

Where C0 be the initial concentration and Ct be the concentration after t seconds.

Given that C0 of ammonium nitrate = 0.957 M

rate constant = 0.196 /s

t = 39 s.

The concentration after 39 seconds is calculated as follows:

0.196 /s = 1/39s ln (0.957 M / Ct)

Ct = 0.957 / (ln⁻¹ (0.196 × 39))

    = 0.003 M.

Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.

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0.337 g As

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 2.71 × 10²¹ atoms As

[Solve] grams As

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of As - 74.92 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

0.337152 g As ≈ 0.337 g As

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

Answer:

2,795 F

Explanation:

The structural features which contributes to a high thermal conductivity are the direction of travel of heat and the nature of materials.

This is referred to as a measure of its ability to conduct heat or current and it is dependent on some factors such as the nature of the materials.

For example , metals conduct heat and electricity easily because the materials allow free electrons to move between the atoms and also the direction of travel of heat which is towards them is also a factor in this regard.

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Answer:

Explanation:

In weight/volume (w/v) terms,

   1 ppm = 1g m-3 = 1 mg L-1 = 1 μg mL-1

200 mL = 0.2 L

15 / 0.2 mg L-1 =75 ppm

The concentration in ppm of a solution which is prepared by dissolving in 15mg of NaCl in 200ml water is 75 mg/.,

ppm stand for 'part per million' and it is used to define the concentration of any substance as mass of any substance present in per liter of volume of solution, its unit for measurement is mg/L.

Given that, mass of NaCl = 15mg

Volume of solution = 200mL = 0.2L

Concentration in ppm will be calculated as:
ppm = 15/0.2 = 75mg/L

Hence ppm concentration of NaCl is 75 mg/L.

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Answer:

San Diego boasts top crops in nursery, flowers, avocados, tomatoes, citrus, chickens & eggs, shrooms, succulents, strawberries, coffee & cannabis. Most of San Diego County farms are small 1-9 acre proprieties, and that awards San Diego County more certified organic growers than any other county in the nation.

To make the change from moles to grams we must use the molar mass of the compound. To find the molar mass we must add the atomic masses of each element present in the molecule. We make the following table:

Molar Mass = 54.938+64.13+127.992=247.063g/mol

Now, the grams in moles will be found by multiplying the given moles by the molar mass:

In 5 moles of Mn(SO4)2 there are 1x10^3 g Mn(SO4)2

The general gas equation, commonly referred to as the ideal gas law, represents the state of a fictitious ideal gas through an equation. Despite its numerous drawbacks, the ideal gas law provides a decent approximation of the behaviour of many gases in a variety of situations.

The combination of Boyle's law, Charles's law and Avogadro's law results in the formation Ideal gas law and the ideal gas equation is given as:

PV = nRT

T = PV / nR

15 × 50 / 11.9 × 0.0821 = 767.7 K

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The number of moles of ammonia present in a 7.686 g sample of ammonia, which has a molar mass of 17.030 g/mol is 0.45 moles.

HOW TO CALCULATE NUMBER OF MOLES:

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Answer:

Explanation:

H₂A    ⇄   HA⁺  +  A⁻

K₁ = [ HA⁺] [A⁻ ] / [ H₂A ]

HA⁺ ⇄  H⁺ + A⁻

K₂ = [ H⁺] [ A ⁻ ] / [ HA⁺ ]

H₂A           ⇄   HA⁺      +        A⁻

.100                     0                 0

.100 - C                C                C

K₁ = [ HA⁺] [A⁻ ] / [ H₂A ]

Putting the values

1.00 x 10⁻⁴ =   C X C / .1  -  C

10⁻⁵ - 10⁻⁴ C = C²

C²  + 10⁻⁴ C - 10⁵ = 0

C = 8 X 10⁻² M

So concentration of H₂A that is [ H₂A ]  = 1 - C =   0 .1 - 8 X 10⁻² M

= .02 = 2 x 10⁻² M

NaHA    ⇄   Na⁺ + HA⁻

NaHA is a strong acidic salt  so it will ionise 100 %

NaHA    ⇄   Na⁺ + HA⁻

.1                   .1         .1  

concentration of HA⁻  =  .1 M

Na₂A ⇄  2Na⁺  + A⁻²

Na₂A is also a strongly ionic  salt so it will dissociate 100 % .

Na₂A ⇄  2Na⁺  + A⁻²

.1               .1          .1  

concentration of A⁻²  = .1 M  

HA⁺    ⇄       H⁺   +     A⁻

8 X 10⁻²         C₁        C₁  

K₂ = [ H⁺] [ A ⁻ ] / [ HA⁺ ]

Putting the values

1.00 x 10⁻⁸ = C₁ X C₁ /  C

1.00 x 10⁻⁸ = C₁²  /  8 X 10⁻²

C₁² = 8 x 10⁻¹⁰

C₁ = 2.828 x 10⁻¹⁰

[ H⁺]  = 2.828 x 10⁻¹⁰

pH = - log  [ H⁺]  = - log 2.828 x 10⁻¹⁰

= 10 - log 2.828

= 10 - .45

= 9.55 .

Answer:

20 degree and 4000000N

The Voltage is the pressure from the electrical circuit of the power source that passes the current.

The Voltage is defined as the pressure from the electrical circuit of the power source that will passes the charged electrons that is the current through the conducting loop, it will enable them to do work  because of the illuminating the light. The in simple terms is : voltage = pressure, and it is denoted as the volts and the symbol is the V.

The voltage is described as the force that causes the flow of the charged particles. The Voltage is also called as the electromotive force.

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Explanation:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds