A 1.0 x10 - 4 M solution has a pH of 10.00. The solute is a _____.Select one:a. weak acidb. weak basec. strong acidd. strong basei put d but answer was wrong can you explain how to figure this out

Answers

Answer 1

1) List the known and unknown quantities.

Sample: unknown.

Concentration: 1.0*10^(-4).

pH: 10.00.

Characteristic: unknown.

2) pH scale.

Weak acid: 4 - 6

Weak base: 8 - 10

Strong acid: 1 - 3

Strong base: 11 - 14

According to the more specific pH scale above, 10.00 corresponds to a weak base.

Option B.

A 1.0 X10 - 4 M Solution Has A PH Of 10.00. The Solute Is A _____.Select One:a. Weak Acidb. Weak Basec.
A 1.0 X10 - 4 M Solution Has A PH Of 10.00. The Solute Is A _____.Select One:a. Weak Acidb. Weak Basec.

Related Questions

Marine science table 20-2

Answers

The distance between two consecutive crests or troughs of a wave, particularly in the case of electromagnetic or sound waves, is known as its wavelength.

The wavelength (in nanometers) or frequency of light is used to quantify it (in Hertz). Like with radio waves, they can also be as long as centimetres or metres. It is represented by and inversely proportional to wave frequency.

What distinguishes frequency from wavelength?

Frequency and wavelength are intimately related, particularly in the context of light. Frequency is determined by the number of waves that pass through a single place over a particular period of time, whereas wavelength is the distance between two successive troughs or crests.

The crest of a wave is the part of transverse waves that are above the mean level. The wave's trough is the region of transverse waves that lies below the mean level. The distance between two succeeding crests or troughs is known as the wavelength.

To learn more about Wavelength, visit

https://brainly.com/question/10027082

#SPJ13

What is the pH of an aqueous solution if the [H3O+] = 0.055 M?

Answers

Answer

pH = 1.26

Explanation

If the [H3O+] of an aqueous solution is 0.055 M, then its pH can be calculated using the pH formula below.

[tex]\begin{gathered} pH=-log[H_3O^+] \\ \\ pH=-log(0.055) \\ \\ pH=-(-1.26) \\ \\ pH=1.26 \end{gathered}[/tex]

The pH of an aqueous solution of 0.055 M is 1.26

Which period 2 element would the 4th ionization energy be much larger than the 3rd ionization energy?

Answers

Period 2 element would the 4th ionization energy be much larger than the 3rd ionization energy is Boron.

Boron belongs to period second. atomic no. of boron is 5 and the electronic configuration is given as :

B₅  =   1s² 2s² 3p₁

The 1st ionization energy = 800.6

the 2nd ionization energy = 2427.1

the 3rd ionization energy = 3659.7

the 4th ionization energy = 25025.8

So. we can see that the 3rd ionization energy is much lower than 4th ionization energy because after removing the 3rd electron from 2s boron will attain the stable electronic configuration of helium. now to remove electron from filled orbital it will require much larger energy the 3rd ionization energy.

To more about ionization energy here

https://brainly.com/question/11266461

#SPJ1

What triggers the development of a tornado?
A.
unstable Coriolis forces
B.
water vapor rising too quickly from the ocean
C.
the colliding of two cold fronts
D.
a cold air mass colliding with a hot air mass

Answers

A cold air mass colliding with a hot air mass triggers the development of a tornado and is denoted as option D.

What is Tornado?

This is referred to as a violently rotating column of air and it is caused as a result of different types of factors such as the humidity , temperature etc.

A tornado is usually very violent and it is formed when cold air mass collides with a hot air mass and is often characterized by a green color in most situations and is therefore the reason why option D was chosen as the most appropriate choice.

Read more about Tornado here https://brainly.com/question/28285636

#SPJ1

what is the molality of a solution contain 82.6g of butane dissolved in 0.500kg of hexane

Answers

Considering the definition of molality, the molality of a solution that contain 82.6g of butane dissolved in 0.500kg of hexane is 2.84 moles/kg.

Definition of molality

Molality is a measure of chemical concentration that indicates the amount of a substance dissolved in a given mass of solvent.

In other words, molality is the number of moles of solute that are dissolved in 1 kilogram of solvent.

The Molality of a solution is determined by the expression:

molality= number of moles of solute÷ kilograms of solvent

Molality is expressed in units moles/kg.

Molality in this case

In this case, you know:

Mass of butane= 82.6 gramsMass molar of butane= 58 g/moleNumber of moles= Mass of butane÷ Mass molar of butane= 1.42 molesKilograms of solvent= 0.500 kg

Replacing in the definition of molality:

molality= 1.42 moles÷ 0.500 kg

Solving:

molality= 2.84 moles/kg

Finally, the molality of the solution is 2.84 moles/kg.

Learn more about molality:

brainly.com/question/20366625

brainly.com/question/4580605

#SPJ1

If the pH of an acid is 5.1, what is the concentration of the H+?

Answers

Answer

[H+] = 7.94x10^-6 M

Explanation

Given:

pH = 5.1

Required: The concentration of H+

Solution

pH = -log[H+]

5.1 = - log [H+]

[H+] = 10^-5.1

[H+] = 7.94x10^-6 M

1s² 2s²2p6 is the electron configuration of

Answers

The electron configuration 1s² 2s²2p6 is the element Neon.

Which four different electron configurations are there?

One orbital may house a maximum of two electrons, and there are four different types of orbitals (s, p, d, and f). More electrons can be held in the p, d, and f orbitals since they contain various sublevels. As was said, each element's location on the periodic table determines the specific electron configuration of that element.

The octet rule states that an atom's outermost shell may hold no more than 8 electrons (except K shell which can accommodate maximum 2 electrons). Hence, potassium's electrical structure.

The quantity of valance electrons, which take part in the creation of a chemical bond, is found in an atom's outermost shell. The outermost shell of the atom's electrical structure contains 4 valance electrons.

To know more about Electron configuration visit:

https://brainly.com/question/13497372

#SPJ13

Balance the equation: __Rh + __O2 --> __Rh2O7

Answers

Answer:

[tex]4Rh+7O_2\text{ }\rightarrow2Rh_2O_7[/tex]

Explanation:

Here, we want to balance the given chemical equation

We can start by balancing the oxygen atoms

We have 7 on the left and 2 on the right

To make a balance, we place 7 before the molecular oxygen on the left and 2 on the given oxide

That means we would be having 4 Rh on the left

To balance the Rh, we have to place 4 on the left side

Thus, we have the balanced equation as:

[tex]4Rh+7O_2\text{ }\rightarrow2Rh_2O_7[/tex]

What is the volume of a 10% m/v aqueous solution that contains 37.8g of HN03?

Answers

378mL is the volume of a 10% m/v aqueous solution that contains 37.8g of HN03

What is an aqueous solution?

A solution in which the solvent is water is referred to as an aqueous solution. By adding (aq) to the appropriate chemical formula, it is typically shown in chemical equations. For instance, Na+(aq) + Cl would be used to represent a table salt solution (also known as sodium chloride, or NaCl) in water (aq).

The word aqueous, which derives from the Latin word aqua, means being or consisting of water. Water is a common solvent in chemistry because it works great as a solvent and is also readily available. In experiments, water is frequently used as the solvent; therefore, unless otherwise specified, the term "solution" refers to an aqueous solution.

The mass of HNO3 =  37.8g

The mass is 10% m/v of the solution which implies

10/100 = mass/ volume

Volume = 10mass

Volume = 10(37.8g)

Volume = 378mL

Thus, 378mL is the volume of a 10% m/v aqueous solution that contains 37.8g of HN03

Learn more about aqueous solution

https://brainly.com/question/19587902

#SPJ9

How many ml. of pepsi are there in a 2.55 quart bottle of pepsi?

Answers

Step 1 - Converting ml and quart

As can be seen in the figure, the conversion factor is:

[tex]1000ml=1.057qt[/tex]

Dividing both sides by 1.057:

[tex]946.07ml=1qt[/tex]

Step 2 - Converting 2.55 quart to ml

Now that we know the conversion factor, we just have to multiply both sides by 2.55:

[tex]\begin{gathered} 2.55\times946.07ml=2.55\times1qt \\ \\ 2.55qt=2412.47ml \end{gathered}[/tex]

There are thus 2412.47 ml in a 2.55 quart bottle pepsi.

Why are elements on the periodic table not arranged by mass

Answers

Periodic table give us a chart where we can see the elements in the increasing order of atomic number because of the repetition of the properties of the elements

What is Periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Arrangements of element is done on the basis of atomic number not on the basis of mass number because on arranging on the basis of atomic number the properties of elements gets repeat due to the arrangement of electron around the nucleus.

Thus periodic table is arranged on the basis or atomic number not on the basis of mass number due to repetition of properties

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ1

The x-ray has a frequency
of 1.4 x 1019 Hz. What is the
energy associated with one
x-ray? ►

Answers

The energy of the photon is 9.24 * 10^-15 J.

What is the energy?

Let us recall that the energy has to do with the product of the frequency and the plank's constant. In thus case, we have the frequency of the photon and we have to find the energy of the photon and we have to do that from the following formula;

E = hf

E = energy of the photon

h = Plan's constant

f = frequency of the photon

Then;

E = 6.6 * 10^-34 Js * 1.4 x 10^19 Hz

E = 9.24 * 10^-15 J

Learn more about energy of a photon:https://brainly.com/question/11016364

#SPJ1

Which compound is a carbohydrate? (1 point)
O HCIO4
O Na₂C₂04
O C4H12N2
O C3H6O3

Answers

Answer:

it's the last one

Answer:

C3H6O3

Explanation:

It is one of the simplest molecules to compare against other molecules, such as sugars and amino acids.

HELP DUE TOMORROWWWW ILL GIVE BRAINLIEST

Answers

Answer:

Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy. A whole branch of physics, thermodynamics, deals with how heat is transferred between different systems and how work is done in the process (see the 1ˢᵗ law of thermodynamics).

 Thermodynamics, and many other related fields, phase transitions are the physical processes of transition between a state of a medium, identified by some parameters, and another one, with different values of the parameters.

consider the reaction 2clf3+2nh3=n2+6hf+cl2 calculate hf for clf3 .
H=-1196 kJ

Answers

The heat of formation of the chlorine tri fluorde is  -1513 kJ.

What is the enthalpy?

The enthalpy refers to the heat that is absorbed or emitted in a reaction. We know that if the heat is absorbed the enthalpy of the reaction is positive but if heat is evolved, the enthalpy of the reaction is negative.

Now we can find the heat of the formation of chlorine tri fluoride a follows;

We have to use the formula;

Sum of enthalpy of formation of products - Sum of enthalpy of formation of reactants

-1196 =(0 + 271 + 0) - (x + (- 46))

-1196 = 271 - x + 46

-1196 = 317 - x

x = -1196  - 317

x = -1513 kJ

Learn more about enthalpy:https://brainly.com/question/13996238

#SPJ1

Missing parts;

Consider the reaction 2ClF3 (g) + 2NH3 (g) → 6HF (g) + N2 (g) + Cl2 (g) △H-_1196 kJ Given the following enthalpies of formation, calculate AHf for CIF3 (9) NH3 (g)- 46 kJ/mol HF 9)271 kJ/mol kJ

What is the pH of a 0.59 M solution of potassium nitrite (KNO2)?

Report your answer to 2 decimal places.

Answers

From the calculation that is based on the ICE table shown, the pH of the solution is  1.8.

What is the pH?

Let us recall that the KNO2 is a salt of the nitrous acid. Our concern now would be on the nitrous ion and we are going to make up the ICE table from the following;

    NO2^-(aq) + H2O(l) ⇄  HNO2(aq) + OH^-(aq)

        HNO2 (aq) ⇄   H^+(aq) +  NO2^-(aq)

I        0.59                 0                0

C      -x                      +x               +x

E     0.59 -x             x                  x

Now we know that the Ka of HNO2 is 4.0x10^-4.

Ka = [H^+] [NO2^-]/[ HNO2]

4.0x10^-4 = x^2/0.59 -x

4.0x10^-4(0.59 -x) = x^2

2.36 x10^-4 - 4.0x10^-4x = x^2

x^2 +  4.0x10^-4x - 2.36 x10^-4  = 0

x=0.015

pH = -log(0.015)

pH = 1.8

Learn more about pH:https://brainly.com/question/15289741

#SPJ1

Question 22 of 29 Which of the following reactions is an acid-base reaction? A) AgNO3(aq) + KF(aq) →→ AgF(s) + KNO3(aq) B) NH3(aq) + HF(aq) → NH4*(aq) + F(aq) C) NO₂ (aq) + Al(s) → NH3(g) + AIO₂ (aq) D) CH4(g) + 2O₂(g) → 2H₂O(g) + CO₂(g)​

Answers

Answer:

good question but very hard

An acid-base reaction is a chemical reaction which takes place between an acid and a base. An example of acid-base reaction is AgNO₃(aq) + KF(aq) → AgF(s) + KNO₃(aq). Thus, the correct option is A.

What are acid-base reactions?

An acid–base reaction is a chemical reaction which occurs between an acid and a base. This reaction can be used to determine the pH through the method of titration.

This reaction is a type of chemical reaction which involves the exchange of one or more hydrogen ions or protons (H⁺) between the two species which may be neutral (such as water, H₂O) or electrically charged species (ions such as ammonium, NH⁴⁺ and hydroxide, OH⁻; or carbonate, CO₃²⁻).

An example of acid-base reaction is  AgNO₃(aq) + KF(aq) → AgF(s) + KNO₃(aq).

Therefore, the correct option is A.

Learn more about Acid-base reactions here:

https://brainly.com/question/15220646

#SPJ2

A sample of gas with an initial volume of 28.4 L at a pressure of 724 mm Hg and a temperature of 303 K is compressed to a volume of 15.5 L and warmed to a temperature of 379 K. What is the final pressure of the gas?

Answers

To solve this question, we need to use the combined gas equation which is given as

[tex]\begin{gathered} \frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} \\ p=\text{pressure} \\ v=\text{volume} \\ t=\text{temperature} \end{gathered}[/tex]

Now we should write down the given data

[tex]\begin{gathered} v_1=28.4l \\ p_1=724\operatorname{mm}hg \\ T_1=303K \\ v_2=15.5L \\ T_2=379K \\ p_2=\text{ ?} \end{gathered}[/tex]

So, we would use the previous equation i wrote down.

[tex]\begin{gathered} \frac{p_1v_1}{t_1}=\frac{p_2v_2}{t_2} \\ \frac{724\times28.4}{303}=\frac{p_2\times15.5}{379} \\ 67.8600=\frac{p_2\times15.5}{379} \\ 15.5p_2=67.86\times379 \\ 15.5p_2=25718.94 \\ \text{divide both sides by the coefficent of p2} \\ \frac{15.5p_2}{15.5}=\frac{25718.94}{15.5} \\ p_2=1659.28\operatorname{mm}hg \end{gathered}[/tex]

From the calculations above, the final pressure of the gas is 1659.28mmHg

18. If a compound has 6 carbons, 12 hydrogens, and 1 oxygen, what is its chemical formula?
a. C6H12OH
b. CsH6O12 120g as Josqmos as ed of slunnal
c. C6H₁1OH
d. 8C12HO
e. C7H12O3

Answers

Carbon, hydrogen, and oxygen are the main components. Glucose has the chemical formula C6H12O6. This indicates that there are six carbon atoms in each glucose molecule.

What is the name of a 6 carbon ring?

Image for number 18 What is the chemical formula of a molecule with 6 carbons, 12 hydrogens, and 1 oxygen? CsH6O12 120g as Josqmos as ed of slunnal; C6H12OH; and C6H11OH, 8C12HO, C7H12O3, and

Aromatic rings are hydrocarbons that contain benzene or another comparable ring structure. They are sometimes referred to as aromatic compounds or arenes. The chemical symbol for benzene, C6H6, is frequently represented as a ring of six carbon atoms with alternate double and single bonds: There are a few issues with this straightforward image, though.

To learn more about carbon compounds refer to:

https://brainly.com/question/141693

#SPJ13

Question 5
2 Points
The composition of a mixture of potassium chlorate and potassium chloride is to be determined. A 9.47 gram sample of the mixture
is heated until the creation of oxygen gas stops. If the sample mass after heating is 7.11 grams, what is the percent by mass of
potassium chlorate in the mixture? Report your answer with 3 significant figures.
Add your answer

Answers

The percent by mass of potassium chlorate in the mixture is 62.46 %

Potassium chlorate is a compound containing potassium, chlorine and oxygen, with the molecular formulation KClO₃. In its natural form, it is a white crystalline substance. After sodium chlorate, it's far the second one maximum not unusual chlorate in commercial use.

Potassium chloride, also referred to as potassium salt, is used as a medicine to treat and prevent low blood potassium. Low blood potassium may also occur due to vomiting, diarrhea, or certain medications.

A aggregate is a material made of two or more extraordinary chemical materials which are not chemically bonded. A combination is the bodily aggregate of two or greater substances wherein the identities are retained and are combined in the shape of answers, suspensions and colloids

KClO₃ + KCl = 9.47 gram   ---------  sample before heating

KClO₃ + KCl = 7.11 gram      ----------  sample mass after heating

mass of oxygen = 9.47 - 7.11 = 2.36 gram

Therefore mass of KClO₃ in an mixture is = 7.11/2 + 2.36

                                                                     = 5.915 gram

Therefore, the percent by mass of potassium chlorate in the mixture = 5.915/9.47 × 100

= 62.46 %

Learn more about mixture here:-https://brainly.com/question/24869423

#SPJ9

The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminol into a total volume of 75.0 mL of H2O .What is the molarity of the stock solution of luminol?Express your answer with the appropriate units.

Answers

1) List the known and unknown quantities.

Sample: luminol.

Mass: 10.0 g.

Volume: 75.0 mL.

Molarity: unknown.

2) Set the equation.

[tex]M=\frac{moles\text{ }of\text{ }solute}{liters\text{ }of\text{ }solution}[/tex]

3) Conversion of units.

3.1-Convert mass to moles.

The molar mass of luminol (C8H7N3O2) is 177.1601 g/mol.

[tex]mol\text{ }C_8H_7N_3O_2=10.0\text{ }g\text{ }C_8H_7N_3O_2*\frac{1\text{ }mol\text{ }C_8H_7N_3O_2}{177.1601\text{ }g\text{ }C_8H_7N_3O_2}[/tex][tex]mol\text{ }C_8H_7N_3O_2=0.05645\text{ }mol\text{ }C_8H_7N_3O_2[/tex]

3.2-Convert mL to L.

1 L = 1000 mL

[tex]L=75.0\text{ }mL*\frac{1\text{ }L}{1000\text{ }mL}=0.075\text{ }L[/tex]

4) Plug in the known quantities.

[tex]M=\frac{0.05645\text{ }mol\text{ }C_8H_7N_3O_2}{0.075\text{ }L}[/tex][tex]M=0.7527\text{ }M\text{ }C_8H_7N_3O_2[/tex]

The molarity of the stock solution is 0.75 M C8H7N3O2.

.

11. Which of the following is true at equilibrium?a.The reaction stopsb. The forward and reverse reactions occur at equal ratesC. The reactants have been used upd. The products have been used up

Answers

Explanation:

Equilibrium occurs in a reversible reaction. This occurs when in a reaction the products formed react to reproduce the reactants. So basically, the forward and reverse reaction occur at equal rates.

Answer:

The correct answer is B.

5.Which of the following statements is true of the particles found in gas?Select one:a. They are closely spaced and not very energetic.b. They are closely spaced and very energetic.c. They are far apart and not energetic.d. They are very far apart and very energetic.

Answers

Answer

d. They are very far apart and very energetic.

Explanation

The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

Gas particles are in constant rapid motion in random directions. The fast motion of gas particles gives them a relatively large amount of kinetic energy.

1.
What causes convection currents to form in the ocean?

Differences in water density

Differences in water depths

Differences in water quality

2.
Which of the following is an example of heat transfer through convection?

Feeling heat from a campfire

smoke rising from a volcano

A metal spoon getting warm from being in hot water

3.
In which direction does heat always flow?

From a larger object to a smaller object

From a cooler object to a warmer object

From a smaller object to a larger object

From a warmer object to a cooler object

4.
Which of the following is the best description of convection?

Heat transfer between two objects that are touching

Heat transfer through movement in fluids

Heat transfer through empty space

80 points. 20 points each question.

Answers

1. Convection currents are caused by Differences in water density.

2. Feeling heat from a campfire is an example of   heat transfer through convection.

3. Heat always flow from a warmer object to a cooler object.

4. The best description of convection is Heat transfer through movement in fluids.

Differential heating leads to convection currents. Warm, less dense, lighter material rises while cool, more dense, heavier material sinks. Convection currents are patterns of circulation that are produced by this movement in the Earth's mantle, oceans, and atmosphere.

The transfer of heat between two bodies by currents of moving gas or fluid is known as convective heat transfer. In free convection, air or water rises and is replaced by a cooler parcel of air or water as it moves away from the hot body.

Heat energy will always transfer from the warmer object to the cooler object under normal circumstances and in nature. Up until the two substances reach the same temperature, heat energy will transfer between them. The term "thermal equilibrium" describes this.

To learn more about heat transfer visit the link:

https://brainly.com/question/13433948?referrer=searchResults

#SPJ1

What is a nonrenewable resource?

Answers

Non-renewable resources are resources found by humans as a source of energy and such resources cannot be replenished. Therefore, such resources should not be wasted.

Nature is the epitome of beauty and grace but as humans grow up they forget the shining and uplifting virtues. People should use resources responsibly. Non-renewable resources come from the earth. The supply is finite and could take billions of years to replenish.

In the past, many non-renewable energies were relatively cheap to generate. However, as supplies continue to dwindle the cost of this extraction is likely to increase, prompting customers to turn to alternative power sources such as solar and wind. The most common examples of natural resources include crude oil coal uranium and mineral resources such as gold. A subset of non-renewable resources includes crude oil and natural gas. Both substances are made of organic carbon materials and change shape over time after being heated and compressed.

Learn more about Non-renewable resources here:-https://brainly.com/question/14432353

#SPJ1

The heat of vaporization of water is 540 calories per gram. Based on your calculations in
question 13, how many calories would be required to raise the same mass of water and
convert it from water liquid (95 0C) to water gas (1000C)?
Show your work for partial credit.
Step 1: Water raises from 95°C to 1000C

Answers

To convert 100.0 g of water at 20.0 °C to steam at 100.0 °C requires 259.5 kJ of energy.

For this problem, there are only two heats to consider:

q

1

= heat required to warm the water from 20.0 °C to 100.0 °C.

q

2

= heat required to vapourize the water to steam at 100 °C.

q

1

=

m

c

Δ

T

=

100.0 g × 4.184 J

C

1

g

1

×

80.0

C

=

33 472 J

q

2

=

m

Δ

H

vap

=

100.0 g × 2260 J⋅g

1

=

226 000 J

q

1

+

q

2

=

( 33 472 + 226 000) J = 259 472 J = 259.5 kJ

(4 significant figures)

PLEASE HELP!
In a monomolecular reaction A->B , at t =250C, the initial concentration decrease at 25% in t =52 min. Calculate:

a) the constant rate;

b) the time after the initial concentration decrease with 75%;

c) the initial reaction rate, if the initial concentration of the reactant is 2.5 mol/L·s.

Answers

1) The rate at which this reaction occurs is obtained as  9.22 * 10^-5 s-1

2) The time that the reaction takes is obtained as 15033 s

3) The initial reaction rate is 9.22 * 10^-5 M

Can we find the rate of reaction?

To obtain the rate of reaction is to find the rate at which the reactants move on to become products.

In this case there is  reduction of the amount by 25% in 52 min.

Hence;

Initial concentration [A]o =  [A]oFinal concentration =  [A]o - 0.25  [A]o = 0.75 [A]oTime taken = 52 min or 3120 s

Using the approach of first order kinetics;

ln[A] = -kt + ln[A]0

k = -(ln[A] -  ln[A]0)/t

k = - (ln0.75 [A]o/A]0)/3120

k = 9.22 * 10^-5 s-1

b) It was given in the question that;

[A] =  [A]o - 0.75  [A]o = 0.25 [A]o

ln[A] = -kt + ln[A]0

t = -(ln[A] -  ln[A]0)/k

t = - (ln0.25 [A]o/A]0)/9.22 * 10^-5

t = 15033 s

c) When the initial rate is is 2.5 mol/L·s

k = - (ln0.25 (2.5)/ln(2.5))/15033

k = 9.22 * 10^-5 M

Learn more about rate of reaction:brainly.com/question/8592296

#SPJ1

Fictitious element Az has two common isotopes. What is the average atomic mass (in amu) of Az given that seven-ninth of the isotopes have a mass of 325.2 amu, while the rest have a mass of 329.6 amu? Report the answer to 4 significant figures.

Answers

The average atomic mass of the fictitious element Az is 326.2 amu

The average atomic mass (on occasion referred to as atomic weight) of an element is the weighted average mass of the atoms in an obviously going-on sample of the element. average masses are typically expressed in unified atomic mass gadgets.

The atomic mass of detail is the common mass of the atoms of an element measured in the atomic mass units (AMU, also called daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of every isotope is improved via the abundance of that specific isotope.

The atomic mass is a median of an element's atomic hundreds, weighted via the herbal abundance of each isotope of that detail. it is a weighted common because exclusive isotopes have one-of-a-kind hundreds. An atomic mass unit is 1/12th of the mass of a 12C atom.

Average atomic mass = Σ % abundance × mass

                                     = 325.2 × 7/9 +  329.6 × 2/9

                                      = 252.93 + 73.24

                                      = 326.17 amu

Learn more about average atomic mass here:-https://brainly.com/question/24186882

#SPJ1

Why is an indicator used in a titration?To help reactants react successfully.To bind to the acid to form products.To show when the reaction has reached or past the equivalence point.To provide a surface for the reaction to occur.

Answers

Explanation:

The use of pH indicators in the titration process is useful to determine the end point of the titration, indicating that the entire sample is reacted.

Answer: To show when the reaction has reached or past the equivalence point.


The substances that make it up keep their physical properties

Answers

Answer:

A mixture is a combination of two or more substances in any proportions. The substances in a mixture do not combine chemically, so they retain their physical properties. A homogeneous mixture has the same composition throughout.

Other Questions
HELP PLEASEE!!!! my last question and hardest one I need help can someone help me? Which of the following statements is most true regarding the use of testimony on hair samples in courts today? Malapit sa isang ilog ang inyong tahanan.Isang araw ay isang malakas na bagyo ang tumama sa inyong rehiyon at sa mga karatig-rehiyon.Nagbabahay-bahay na ang kapitan ng inyong barangay para ipaalalang maghanda na kayo dahil kapag tumunog ang alarma ay kailangan na ninyong lumikas.Ano ang gagawin mo at nang iyong pamilya? HELP IM MARKING BRAINLEIST find 7% of 41 do not round your answer 5) 13% of scoreOn a blueprint of a house, the living room has dimensions of 3 inches by 5 inches. If the scale for theblueprint is 1 inch for every 7 feet, then what is the area of the actual living room?A. 15 ftC. 735 ftB.D.105 ft256 ft Find the area of the following figure. Show your work.area of odd shapes. Jose made $143 for 11 hours of work.At the same rate, how many hours would he have to work to make $117? Pls help due tomorrow!! In the titration of acetic acid and naoh, the use of the color indicator requires that excess base be added in order to detect the endpoint. Will this cause the calculated and reported mass percent of acetic acid in vinegar to be too high or too low? explain. businesses come and go. in many countries some businesses have been around for 100 years, and then all of a sudden are gone or at least it appears that way. usually this is not the case, but to the consumer's eyes they are there one day and gone the next. what is the most common reason for this happening? What is the advantage of comparing human neural networks to robots artificial intelligence in the article Human Thinking, Robot Thinking? a. It shows that robots are smarter than humans. b. It shows that humans and robots can learn in similar ways. c. It shows that robots will never be able to operate without a human. d. It shows that humans are able to learn while robots are not. plss tell the answer I will get 0 if I didn't get it right Please answer asap this is do today Which statement best describes the mass numbers of the atoms in the reaction?OThere is one atom with a mass number of 1O There are two atoms with mass numbers of 2.OThere is one atom with a mass number of 2.O There are two atoms with mass numbers of 1. which acronym serves as a reminder that when you negotiate, you shouldn't accept an offer that is worse than what you'd get if didn't negotiate at all? A company reported the following: Cost of Goods Sold $201,200 General, Selling, and Administrative Expenses 52,920 Income Tax Expense 3,720 Inventory 30,000 Net Income 23,880 Sales Revenue 287,000 Sales Discounts 2,840 Sales Returns & Allowances 2,440 What is the amount of income before income taxes? Select two symbols portrayed within the Catacomb of Priscilla. Discuss their representation and how these symbols connect to the overall intention of this space. Im pretty sure its weather, am i correct? if not, please explain why peaky blinder enterprises (pbe) has a beta of 1.46, the market risk-premium is 6.25 percent, and the risk-free rate is 2.80 percent. what is the expected return for pbe stock?