What is the pH of a 4.7 x 10-9 M HCl solution? *

4.67


8.33


11.21


2.93​

Answers

Answer 1
11.21 or 2.93 I think

Related Questions

Plants have various levels of organization. At which level of organization are the smallest structures in a plant?

Cellular
Organ
Organism
Tissue

Answers

Organ is the answer not the cellar

A solid substance turns directly into a gas. Which term describes this change?

A)deposition
B)evaporation
C)melting
D)sublimation

Answers

Given what we know, we can confirm that the correct term to describe the change from a solid into a gas is sublimation.

What is sublimation?Sublimation is the change from a solid-state into a gas state.Most of the time one will first observe the change into a liquid state, however, with sublimation, the change is directly from the solid into the gas, such is the case with dry ice. Dry Ice is frozen carbon dioxide, as it thaws, it changes directly into its gaseous state.

Therefore, we can confirm that sublimation describes the process by which an element passes from a solid directly into a gas, without first becoming a liquid.

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Answer:

D. sublimation

Explanation:

Correct on Edge 2022!!!

Good luck everyone, you got this! Have a great day!

Fluorine gas a 300 K occupies a volume of 500 mL. To what temperature should it be lowered to bring the volume to 300 mL?

Answers

180 K

V1/T1 = V2/T2
V1 = 500 mL
T1 = 300 K
V2 = 300 mL

Solve the equation for T2 —> T2 = V2T1/V1

T2 = (300 mL)(300 K) / (500 mL) = 180 K

The temperature should be lowered to 300K to bring the volume to 300mL.

What is temperature?

Temperature is the degree of hotness or coldness of a place or a body. The SI unit of temperature is Kelvin.

What is volume?

Volume is the amount of space occupied by matter. The SI unit of volume is cubic metre.

Using Charles law,

V1/V2 = T1/T2

Where, V1 and T1 are the initial volume and temperature

Similarly, V₂ and T₂ are the final volume and temperature.

Given:

V1 = 500mL

T1 = 300K

V2 = 300mL

T2 = ?

V1T2/V1 = V2T1/V1

          T2 = V2T1/V1

                = 300mL x 300K/500mL

           T2 = 180K

Hence, the temperature should be lowered to 300K to bring the volume to 300mL.

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A slug travels the length of a log in 2 hours. If the slug's average speed is 1.5 cm / minute how long is the log

Answers

Answer:

The length of the log is 180 cm

Explanation:

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

Time = 2 hours

Speed = 1.5 cm/min

Distance =?

Next, we shall convert 2 hours to minutes. This can be obtained as follow:

1 h = 60 mins

Therefore,

2 h = 2 × 60

2 h = 120 mins

Finally, we shall determine the Lenght of the log. This can be obtained as follow:

Time = 120 mins

Speed = 1.5 cm/min

Distance =?

Speed = distance / time

15 = distance / 120

Cross multiply

Distance = 1.5 × 120

Distance = 180 cm

Therefore, the length of the log is 180 cm

Answer:

180

Explanation:

Albino trees exist in nature, but they’re rare. These trees contain a gene mutation that causes them to lack chlorophyll, so their leaves are white. In California, albino redwood trees are parasites. They survive off the energy from nearby redwood trees. Why do you think they need to use energy from other trees to survive?

Answers

Answer:

They need to use energy from other tress to survive so that they can do basic functions, like absorbing nutrients from the ground, and growing back leaves. They don't have chlorophyll, so they need that energy to do the functions I mentioned above.

Explanation: Hope this helps!

Answer:

Trees need chlorophyll to make energy. Because albino trees don’t have chlorophyll, they can’t create their own energy. So, they must take energy from other trees to survive.

Explanation:

All of the facts about our star the Sun listed below are true EXCEPT which option?
A. the sun is the smallest object in our Solar System.

B. the sun is an average-sized yellow star.

C. the sun is located in an arm of the spiral shaped Milky Way galaxy.

D. the sun appears brighter because it is much closer to Earth than other stars

Answers

Answer:

A

Explanation:

The sun is the smallest object in our solar system

Answer:

A. the sun is the smallest object in our solar system

Explanation:

In 2009, the Hubble Space Telescope discovered the smallest object ever seen in visible light at the time within the Kuiper Belt. The Kuiper Belt Object (KBO) found was a mere 3,200 feet (975 meters) across and was 4.2 billion miles away.

Agas has a pressure of 6.58 kPa at 540 K. What will the pressure be at 210 K if the volume

does not change?

26 kPa

260 kPa

17.000 kPa

17 kPa

Previous

Next >

Answers

Answer:

[tex]P_2=2.6kPa[/tex]

Explanation:

Hello there!

In this case, according to the Gay-Lussac's gas law, which illustrates the pressure-temperature behavior as a directly proportional relationship:

[tex]\frac{P_2}{T_2}=\frac{P_1}{T_1}[/tex]

We can solve for the final pressure as shown below:

[tex]P_2=\frac{P_1T_2}{T_1}[/tex]

Thus, we plug in the initial pressure and temperature and final temperature to obtain:

[tex]P_2=\frac{6.58kPa*210K}{540K}\\\\ P_2=2.6kPa[/tex]

Which is not among the choices.

Regards!

Click to select the correct answers. Click again to unselect answers. Leave the incorrect answers unselected.
Choose all of the examples where there would be an increase in the electric or magnetic force.
Increase the amount of charge on each object
Decrease the distance between the objects
Decrease the charge on one of the objects
Increase the distance between the objects
Increase the mass of the objects

Answers

Answer:

1,2,5

Explanation:

I took it on usatesprep

QUESTIONS
40. Because stimulants
will be compromised.
your ability to use proper judgment on the road
A. increase your heart rate
B. overload your nervous system
C. slow down your bodily functions
D. usually cause hallucinations

Answers

Answer:

B.

Explanation:

1. Cierta muestra fue diluida así: 1 mL MP se agrega 4mL de agua, luego se extrae 0,5 mL y se lleva a 5 mL y de esta última se obtiene 0,2 y se añade 1,3 de diluyente. Calcule la dilución total.

Answers

Answer:

1/375

Explanation:

Primero se debe calcular el factor de dilución para cada dilución seriada. Para ello, se divide el volumen de muestra entre el volumen final de la solución diluida.

1) 1 mL  en 1 mL + 4 mL = 5 mL

D1 = 1 mL/5 mL = 1/5

2) 0,5 mL en 5 mL

D2 = 0,5 mL/5 mL = 1/10

3) 0,2 mL en 0,2 mL + 1,3 mL = 1,5 mL

D3 = 0,2 mL/1,5 mL = 2/15

La dilución total se calcula como el producto de las diluciones seriadas realizadas:

DT = D1 x D2 x D3 = 1/5 x 1/10 x 2/15 = 1/375

Which molecule is shown below?
H
H-C-H
The
H Η Η Η Η
H-Ċ-Ċ-Ċ-Ċ -C-0-H
11 11 1
Η Η Η Η Η Η
A. 2-ethylhexane
B. 2-methylhexane
C. 3-methylhexane
D. 3-ethylhexane

Answers

Answer:

2-methylhexane

Explanation:

just took it the quiz

2-methylhexane is the molecule shown below. Hence option B is correct.

What is Molecule and atom ?

Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and the elements in the periodic table.

Molecule is made up of atoms, it is formed when two or more atoms bound together. The electrons in the outermost orbit are responsible for the molecule formation. Electrons are shared by the atoms in the entire molecule.

In this problem the structure shown in this figure is a structure of 2-methylhexane. Hence option B is correct.

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can someone please help me:(​

Answers

Answer:

I think (B) is right answer because here oxygen is a combustible material and combustible is always take place when oxygen is burn

How many Zn atoms are there in 4.65 moles of Zn?
atoms
Submit Answer
Retry Entire Group
9 more gra

Answers

There are 6.5 grams

a plane flying at 250 mph for 5 hours. how far did the plane fly?

will give brainliest

Answers

Answer: 1250 miles

Explanation:

D=vt

1250 miles= 250mph(5hr)

1250 pls give brainliest? i can explain the work if you need to

Which of the following is NOT a benefit of
using renewable energy sources?

Answers

Answer:

D, They produce fossil fuels

Explanation:

you can't just pull them out of nowhere

The answer would be considered D.

What is the pH of a solution that has a pOH of 5.9

Answers

Answer:

pH = 8.1

Explanation:

Assuming that we are at 25 degrees Celsius, pH + pOH = 14.

We can then plug in the given pOH and solve for pH:

pH + pOH = 14

pH + 5.9 = 14

pH = 14 - 5.9 = 8.1

Look at the diagram below, which shows an atom of an element. How many valence electrons does it have? Based on this, would the atom be reactive or unreactive?

Answers

1. The number of valence electrons the atom have is seven (7).

2. The atom is reactive

1. How do i determine the number of valence electron in the atom?

Valence electron is simply defined as the number of electron(s) present in the outermost shell of an atom.

Considering the diagram given from the question, the number of electrons in the outermost shell is seven (7).

Thus, we can conclude that the valence electron the atom have is seven (7)

How do i know if the atom is reactive or not?

From the diagram given, we determine that the number of valence electrons present is 7. This means that the atom required 1 more electron to complete its octet configuration.

Thus, the atom will be very reactive in order to quickly attain a stable configuration.

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The plant chemical which absorbs sunlight and helps make cell food is
A.osmosis
B.cellulose
C.vaculoe
D.chlorophyll​

Answers

Answer:

chlorophyll

Explanation:

What conversion factor will help solve the problem?

2HgO → 2Hg + O2

How many moles of mercury (II) oxide are needed to make 125 grams of O2

125 g O2 x ___1 mol__O2 x ____________ = mols HgO

32.00 g O2

a
2 mol Hg

1 mol O2

b
216.6 g HgO

1 mol HgO

c
1 mol O2

2 mol HgO

d
2 mol HgO

1 mol O2

Answers

Answer:

i fond nothing sooory

pic so PC

define a lone pair and give example

Answers

Answer : a lone pair refers to a pair of valence electrons that are not shared with another atom in a covalent bond and is sometimes called an unshared pair or non-bonding pair

Explanation: ex: Water, Ammonia, hydrogen fluoride. come to mind as the simplest such molecules with lone pairs.

The N in ammonia has 1 lone pair and three bonds (to H).

The O in water has 2 lone pairs and two bonds (to H)

the F in Hydrogen fluoride has 3 lone pairs and one bond.

Answer:In chemistry, a lone pair refers to a pair of valence electrons that are not shared with another atom in a covalent bond and is sometimes called an unshared pair or non-bonding pair. Lone pairs are found in the outermost electron shell of atoms. They can be identified by using a Lewis structure.

How many grams of KOH are needed to make 0.500 L of a 0.10 M solution

Answers

Answer:

2.8 g KOH

Explanation:

We can find the amount of moles we need by multiplying 0.500 L and the molarity given, 0.10 M (molarity is moles of solute divided by liters of solution). The liters cancel out, leaving us with moles; we can then take the moles and convert it to grams of KOH by using the molar mass of KOH.

0.500 L x 0.10 mol/1 L x 56.106 g /1 mol = 2.8 g KOH (two significant figures)

Which of the following are solutions?
Choose more than one if needed

1. Gas dissolved in a liquid

2. Liquid dissolved in a liquid

3. Solid mixed with solid

4. Solid dissolved in a liquid

Answers

Answer:

3

Explanation:

a 1.4g sample of pure gas occupies a volume of 981 mL at 42°C and 117 kPa. Determine the molar mass of the compound.

Answers

Answer:

51 g/mol. Explanation: Whenever you see molar masses in gas law questions, more often than not density will be involved.

1. Give the best advice on being understanding but kinda flirty to a friend that is a girl.
2. You can add a pickup line. :)
THIS IS AN EMERGENCY.

Answers

being understanding is flirty/attractive on its own. listening to her and asking questions bout the situation really shows her that you care and will make you attractive, also maybe inviting to go out to get her mind off things or getting her her fav candy & some other cute little things really will show her that you like her. just be nice to her and listen to what she has to say.

Predict the shape of the molecule.

Answers

Answer: circle

Explanation:

Circle the letter next to each sentence that is true concerning the compressibility of gases. a. The large relative distances between particles in a gas means that there is considerable empty space between the particles. b. The assumption that particles in a gas are relatively far apart explains gas compressibility. c. Compressibility is a measure of how much the volume of matter decreases under pressure. d. Energy is released by a gas when it is compressed.

Answers

Answer:

The large relative distances between particles in a gas means that there is considerable empty space between the particles.

The assumption that particles in a gas are relatively far apart explains gas compressibility.

Compressibility is a measure of how much the volume of matter decreases under pressure.

Energy is released by a gas when it is compressed

Explanation:

The kinetic molecular theory establishes that gases are composed of molecules. These molecules of gas are far apart from each other hence there is a considerable empty space between the gas molecules. As a result of these empty spaces between gas molecules, it is possible to compress a gas.

Compressibility is defined as a measure of how much the volume of matter decreases under pressure. When a gas is compressed, work is done on the gas and energy is evolved hence the gas heats up.

How many ATOMS are in 5 grams of NaCl?

Answers

Answer:

2 atoms

Explanation:

Sodium Chloride or NaCl is made up of two elements, sodium (or Na) and chlorine (or Cl). A molecule of sodium chloride, NaCl, consists of one atom each of sodium and chlorine. Hence, each molecule of NaCl has 2 atoms total.

2原子。塩化ナトリウムまたはNaClは、ナトリウム(またはNa)と塩素(またはCl)の2つの元素で構成されています。

There are approximately 3.01 x 10²² atoms in 5 grams of NaCl.

To calculate the number of atoms, we first need to convert the mass of NaCl into moles. The molar mass of NaCl is 58.44 g/mol, which is the sum of the atomic masses of sodium (22.99 g/mol) and chlorine (35.45 g/mol).

Using the formula:

moles = mass / molar mass

we can calculate the number of moles of NaCl in 5 grams:

moles = 5 g / 58.44 g/mol ≈ 0.0857 mol

Next, we need to use Avogadro's number, which is approximately 6.022 x 10²³ atoms/mol, to convert moles into atoms.

Number of atoms = moles x Avogadro's number

Number of atoms = 0.0857 mol x 6.022 x 10²³ atoms/mol ≈ 5.16 x 10²² atoms

Therefore, there are approximately 3.01 x 10²² atoms in 5 grams of NaCl.

It's important to note that this calculation assumes that all the NaCl is fully dissociated into its constituent atoms, which may not be the case in all situations.

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In q = mCΔT, what does C stand for?

Answers

Answer:

The symbol c stands for specific heat and depends on the material and phase. The specific heat is the amount of heat necessary to change the temperature of 1.00 kg of mass by 1.00ºC.

In which of the following groups of ions are the charges all shown
correctly?

Answers

Answer:

magnesium and potassium are the group of ions

Explanation:

magnessium has positive charge and pottasium has negative charge

Which is the correct chemical symbol for this atom of helium?

Answers

H........................................
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