Calculate the pOH of a 7.68x10-7 M HCl solution.


pOH = (round to 3 sig figs)

Answers

Answer 1

Answer:

pOH = 7.89

Explanation:

As HCl is a strong acid, [H⁺] is equal to the original acid concentration. In other words:

[H⁺] = 7.68x10⁻⁷ M

Knowing [H⁺], we calculate the pH of the solution:

pH = -log[H⁺]pH = 6.11

With the pH, we can calculate the pOH of the solution, using the following formula:

pOH = 14 - pHpOH = 7.89

Related Questions

What is the mass of 2.40 mol H2O?
Answer in units of g.

Answers

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Answer:

204

Explanation:

1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.
2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.
3. Take out 10 mL of this solution and put it into another 90 mL of clear water.
4. Keep diluting the solution like this 5 to 8 times.
5. Is the water still coloured?

Answers

Answer:

2

Explanation:

1. Take 2-3 crystals of potassium permanganate and dissolve them in 100 mL of water.

2. Take out approximately 10 mL of this solution and put it into 90 mL of clear water.

3. Take out 10 mL of this solution and put it into another 90 mL of clear water.

4. Keep diluting the solution like this 5 to 8 times.

5. Is the water still coloured?

A hydroelectric dam produces renewable energy for the local area. Which best explains why more hydroelectric dams are not built?

Answers

Answer:

The dam disrupts the river wildlife and ecosystem.

Explanation:

Though it is believed that using the dam as a power generation or hydroelectric power supply generates no greenhouse gases, it, however, has many disadvantages which make it deemed not suitable or sustainable for use in the contemporary time.

Majorly, the top reason why more hydroelectric dams are not built is that "the dam disrupts the river wildlife and ecosystem."

Also, it affects the water quality and other use of water for humans such as recreational use.

There is also a possible chance of dams producing methane; a greenhouse gas through the organic materials in the water that is rotting.

Which Statements below are true?
A. If motion starts and stops at the same location, then the displacment is zero.
B. Displacement can be fully described with a magnitutde and a unit.
C. Distance measurements must incude magnitude, unit, and direction.
D. Distance is always greater than or equal to the magnitutde of the displacement.

Answers

A. If motion starts and stops at the same location, then the displacment is zero.

D. Distance is always greater than or equal to the magnitutde of the displacement.

How do stars, like the sun, produce energy?

• Answers MUST include:

○ how the energy is produced AND the kinds of energy produced.

Answers

Answer:

The sun, like all stars, is able to create energy because it is essentially a massive fusion reaction. Technically known as nuclear fusion, this process releases an incredible amount of energy in the form of light and heat.

Types of energy produced: Stars produce energy from nuclear reactions, primarily the fusion of hydrogen to form helium.

Explanation:

hope this helped :D

Will mark brainly read it make sense no funny business

Answers

Answer:  mixed

compound

Explanation:

Compound Q decolorizes bromine water. Compound Q has two carbon atoms in each molecule. Which statement about compound Q is correct?


a) It contains carbon-hydrogen double bonds.



b) It has six hydrogen atoms per molecule.


c) It has two carbon-carbon double bonds.


d) It is produced by cracking alkanes.

Answers

C

Explanation :
Alkene decolorizes water so it has a C=C

The statement " It has two carbon-carbon double bonds" is correct. because Q is a kind of unsaturated hydrocarbon.

What is unsaturated hydrocarbon?

The type of compound which contain double bond or triple bond can be considered as unsaturated hydrocarbon. Unsaturated hydrocarbon can decolorized bromine water.

Two kinds of unsaturated hydrocarbon will obtain, alkene and alkyne.

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What was the lowest extent of sea ice in the data, and when did it occur?

Answers

Answer:5 1/2. occurred the other day i think

Explanation:

Explain more pls I’m confused

During _____________ there are 24 hours of daylight at the North Pole.

summer
winter
spring

Answers

Answer:

summer

The North Pole stays in full sunlight all day long throughout the entire summer (unless there are clouds)

Answer:

summer

Explanation:

hope this helps :)

13. "The business of America is business.” — President Calvin Coolidge.
By making this statement, President Coolidge was expressing his support for
a. higher taxes on corporations.
b. banking regulations.
c. democratic socialism.
d. laissez-faire capitalism.

Answers

Answer:

Answer is

A higher taxes on corporations

I hope you like it

what is the enthalpy for 2H2S(g) + 3O2(g) -> 2H2O(I) + 2SO2(g). (∆H)​

Answers

Answer:

2H2S (g) + 3O2 (g) → 2H2O (l) + 2SO2 (g)

Calculate ΔH° from the given data. Is the reaction exothermic or endothermic?

ΔH°f (H2S) = -20.15 kJ/mol; ΔH°f (O2) = 0 kJ/, mol; ΔH°f (H2O) = -285.8 kJ/mol; ΔH°f (SO2) = -296.4 kJ/mol

what is the energy needed to start a chemical reaction?

Answers

Answer:

Activation energy is called the energy required to initiate a chemical reaction.

Explanation:

When a stalactite is formed by water leaving mineral deposits from the ceiling of a cave, this is caused by_____
A:Erosion
B: deposition

Answers

Stalactites are formed by deposition as minerals are deposited to form them.

Answer:

it is b

Explanation: As the carbon dioxide is released, calcite is precipitated or redeposited on cave walls, ceilings and floors. As the redeposited minerals build up after countless water drops, a stalactite is formed.

If .45 moles of water vapor is produced in a chemical reaction that occurs at STP how many liters of water are produxed

Answers

Answer:

10.1 L

Explanation:

At STP (meaning T = 273 K and P = 1 atm) one mol of any given gas will occupy 22.4 liters.

With the above information in mind, we can calculate how many liters will 0.45 moles of water vapor occupy:

0.45 mol * 22.4 L / mol = 10.1 L

Meaning that if 0.45 moles of water are produced at STP, 10.1 liters of water would be produced.

dlaczego emaliowane garnki rdzewieją w miejscach uszkodzenia emalii​

Answers

Answer:

Explanation: I don’t even know what you said

Answer:

so basically

Explanation:

bsuxnssu hhusnn ji

what is an electromagnetic wave PLEASE ILL GIVE 15 POINTS AND BRAINLESt

Answers

[tex]An \:  electromagnetic \: wave can \: travel \: through \: anything \:[/tex]

[tex] - be \: it \: air, \: a \: solid \: material \: or \: vacuum. [/tex]

[tex] It \: does \: not \: need \: a \: medium \: to \: propagate \: [/tex]

[tex]or \: travel \: from \: one \: place \: to \: another[/tex]

An electromagnetic wave can travel through anything - be it air, a solid material or vacuum. It does not need a medium to propagate or travel from one place to another

if it helps don't forget to like and mark me

A substance that catches fire and burns in air is said to be

Answers

Answer:

combustible.

Explanation:

The substances which burn in air are called combustible. Oxygen (in air) is essential for combustion. During the process of combustion, heat and light are given out.

Hope this helped!!!

Answer: flammable

Explanation:

Tara is performing a chemical experiment, at one point she needed to know whether the solution is acidic or basic so she used the PH meter to measure the solution. She got a reading of 13.4,

1. Is the solution acidic or base? Explain why.

2. What will happen to the PH when she will add water to the solution?

Answers

It is a base because its pH is greater than 7

(not sure about the second sorry!)

6. For a chemical reaction, the heat of reaction is equal
to the

Answers

Answer:

internal energy

Explanation:

At constant pressure, the heat of reaction is equal to the enthalpy change of the system. Most chemical reactions occur at constant pressure, so enthalpy is more often used to measure heats of reaction than internal energy

For a chemical reaction, the heat of reaction, also known as enthalpy change (∆H), is equal to the difference between the total energy of the products and the total energy of the reactants.

Enthalpy change represents the amount of heat energy exchanged or released during the course of a reaction. The heat of reaction can be positive (endothermic), indicating that the reaction absorbs heat from the surroundings, or negative (exothermic), indicating that the reaction releases heat to the surroundings.

The magnitude of the heat of reaction is a measure of the amount of heat energy involved in the reaction.

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Calculate the volume, in liters, of 4 mol H2S at 60 degrees celsius and 200 KPa? Show your work

(R=8.31) (K= *C + 273) (PV= nRT)

Answers

Answer: 55.345L

Explanation:

PV=nRT

PV=4R(333)

200V=4(8.31)333

200V=11069

V=11069/200

V=55.345L

Which of the following is likely to be affected by a growing human population?

Question 5 options:

Amount of land for farming


Amount of air pollution


Amount of clean water


All of the above


None of the above

Answers

Answer:

D.) All of the above

is the correct answer

By a growing human population, amount of land for farming, amount of air pollution and clean water is likely to be affected.

What is population?

Population tells about the relative numbers of people present in particular area.

When there is a increase in the population of people then there is decrease in the amount of land for farming because more people want more land and this results in lack of land for individual. The affect of increased population results in the increase of air pollution, noise pollution, land pollution as well as water pollution.

Hence, option (d) is correct i.e. all of the above.

To know more about pollution, visit the below link:

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85 grams of CO2 to molecules

Answers

Answer:

co2 = 44,01 g/mol

85\44= 1,93 mol

Explanation:

What is the empirical formula for a compound that has 31.2% calcium, 18.8% carbon,
and 50% oxygen

Answers

Answer:

CaC2O4

Explanation:

If there are 6 waves in a 2-second time frame, what is the frequency

Answers

Answer:

3 Hz

Explanation:

frequency = [tex]\frac{number of waves}{time}[/tex]

thus [tex]f=\frac{6}{2}[/tex] = 3 Hz

If there are 6 waves in a 2-second time frame, the frequency is 3 Hz. When a wave travels through a medium, the frequency describes how frequently the medium's particles vibrate.

What is the frequency of a wave?

The frequency identifies the frequency at which the particles of the medium vibrate as a wave passes through it.

Frequency = number of waves ÷time

The number of waves is  6 and time is 2 second

     f = 6 ÷ 2

      =  3

A disturbance or variation that causes energy to be transferred gradually from one point to another in a medium. It can be an elastic deformation or a change in pressure, electric potential, electric or magnetic intensity, or temperature.

Therefore, if there are 6 waves in a 2-second time frame, the frequency is 3 Hz.

Learn more about frequency, here:

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How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP??
PLEASE HELP

Answers

9.0 grams will produce 11 L of hydrogen

Answer:

8.8

Explanation:

You can view more details on each measurement unit: molecular weight of Aluminum or grams The molecular formula for Aluminum is Al. The SI base unit for the amount of substance is the mole. 1 mole is equal to 1 mole of Aluminum.

Is a animal searching for water a stimulus or response

Answers

Answer:

response I believe

Explanation:

i'm pretty sure it's a response cause it's the animal responding to needing water and being thirsty

hope this helps! :)

A construction company clears away 75 percent of a forest area for urban development. What will most likely happen to the carrying capacity and the populations of organisms in the remaining forest area?

Answers

The answer is the population of organisms will decrease with loss of habitat, and there is more room for carrying capacity. Hope this helps! Mark brainly please!

Answer:

B. Their populations will decrease, and the carrying capacity will increase.

Explanation:

Which is an essential characteristic of any mineral? A.Liquid B. Artificially manufactured C. Crystal structure D. Formed from organic processes

Answers

Answer:

Crystal structure

Explanation:

This is because minerals are organic or inorganic substances found naturally on the Earth and there are ordered substances at with atomic or molecular level. They are solid at normal Temperature. They have defined chemical composition and also have crystal structures.

I WILL Give BRAINLIST Unlike protists, organisms in the group Animalia
A
have cells with no cell wall and have an organ system.
B
have cells with a cell wall and are heterotrophic.
C
are complex and photosynthetic.
D
are all mobile and autotrophic.

Answers

Answer:

B

Explanation:

B

have cells with a cell wall and are heterotrophic

5. Organisms that make their own energy storage molecules are called producers. What process do
they go through to create these molecules?

Answers

Answer:

I think it's metabolism

Hope this helps

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