How many km are in 1.29 x 10 ^-2 cm?

can someone pls help me

Answers

Answer 1

Answer: 0.0129

Explanation:


Related Questions

Can plants and animals adapt more easily to slow environmental changes or fast environmental changes? Explain.
A. None of the other answer choices

B. Fast changes, because they weed out weak organisms

C. Fast changes, because species prefer to adapt quickly

D. Slow changes, because they give species time to adapt
2..Which trait would likely help an organism survive in a cold environment so it can reproduce offspring?
Responses

A. A good sense of smell

B. Layers of fat

C. Strong legs

D. Large ears

Answers

Answer:

D

Explanation:

Question number 1 is D and Question 2 is C

Please help!! The answer that shows work and does not send link will get brainiest!

Answers

Answer:

5 mol H₂. this is the answer bro all the best for your test/exam

1. How many grams are in 1.7 x 10^23 particles of Cl2?

2. How many moles are in 3.28 x 10^23 atoms of NaCl? *

3. If I were to determine how many liters 26 grams of water is, what type of conversion would this be? *

A Mass --> Moles --> Particles
B Mass --> Moles --> Volume
C Volume --> Mass --> Moles
D Moles --> Mass --> Volume

Answers

Answer: 1. 20.0 grams

2. 0.272 moles

3. B) Mass --> Moles --> Volume

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the number of moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given molecules}}{\text{Avogadros number}}[/tex] or

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] or  

Putting in the values we get:

1. [tex]\text{Number of moles of} Cl_2=\frac{1.7\times 10^{23}}{6.023\times 10^{23}}=0.282moles[/tex]

Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.282mol\times 71g/mol=20.0g[/tex]

2. [tex]\text{Number of moles of NaCl}=\frac{3.28\times 10^{23}}{2\times 6.023\times 10^{23}}=0.272moles[/tex]

3. [tex]\text{Number of moles of water}=\frac{26g}{18g/mol}=1.44moles[/tex]

Volume of water =[tex]moles\times {\text {Molar volume}}=1.44mol\times 22.4L/mol=32.4L[/tex]

Calculate the value of Key in the following reaction if the equilibrium concentrations are
[H2S] -0.25 M, (H2) - 0.88 M, [S2] -0.44M.
2 H2Sig) = 2 H2(g) + S218)

Answers

Answer:

The value of the equilibrium constant Kc is 5.45

Explanation:

The "Law of Mass Action" states:

"For a reversible reaction in chemical equilibrium at a given temperature, it is true that the product of the concentrations of the products raised to the stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients is a constant."

This constant was called the equilibrium constant. For a reaction:

aA + bB ⇄ cC + dD

the equilibrium constant Kc is:

[tex]Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }[/tex]

In this case, the balanced reaction is:

2 H₂S → 2 H₂ + S₂

So, the equilibrium constant Kc is:

[tex]Kc=\frac{[H_{2} ]^{2} *[S_{2} ] }{[H_{2} S]^{2} }[/tex]

The equilibrium concentrations are

[H₂S] =0.25 M[H₂]= 0.88 M[S₂]= 0.44M

Replacing in the definition of equilibrium constant:

[tex]Kc=\frac{(0.88 M)^{2} *0.44 M }{(0.25 M)^{2} }[/tex]

Solving:

Kc= 5.45

The value of the equilibrium constant Kc is 5.45

What is the temperature

Answers

Answer:

I think it mught be 12.9?

Answer:

the average sum of kinetic energy of all the molecules present in a body is called temperature. it's 12.9

hope it is helpful to you

For her science project, Suzanne made an animal cell using a rectangular
shoe box, pipe cleaners, and construction paper. One comment that the
teacher made was that Suzanne should not have used a shoe box. Why did
the teacher make this comment? *

Answers

Answer:

Animal cells are more round and do not have a rigid cell wall.

Explanation:

A una sustancia que tenia una etiqueta poco legible se le determina de iones de 3.16x10 a la -10 M.Calcula su pH determina si se trata de jugo de naranja o leche magneisa

Answers

Answer:

pH = 9.44, leche de magnesia

Explanation:

Número de iones [H⁺] de 3.6x10⁻¹⁰M

El pH es una medida en química utilizada para determinar si una sustancia es ácida o básica.

Si el pH < 7 La sustancia será ácida (Jugo de Naranja)

Si el pH > 10 La sustancia será básica (Leche de Magnesia)

Ahora, el pH es definido como el -log[H⁺], el pH de la solución será:

pH = -log[3.6x10⁻¹⁰M]

pH = 9.44

Como el pH > 7, probablemente se trate de leche de magnesia

number 2 ...............​

Answers

It’s B sonorous

I hope it’s right ❤️❤️❤️

How many moles of H2 can be made from the complete reaction of 1.5 moles of Al? Given: 2 Al + 6 HCl → 2 AlCl3. + 3 H2

Answers

Answer:

2.25 mol H₂

Explanation:

To calculate mol of H₂ ensure that the equation is balanced. Then use the equation and dimensional analysis to convert the given 1.5 mol Al to mol of H₂.

If an atom has 7 valence electrons, what will its charge be when it becomes an ion?

Answers

Answer:

Well, he needs to take one more electron to have a stable structure. And by doing that the atom will have more electrons than protons and will turn into a negative ion.


How many chlorine atoms are there in 100 g of carbon tetrachloride

Answers

Answer:

1.566x10²⁴ atoms of Cl

Explanation:

In Carbon tetrachloride, CCl₄, you have 4 moles of Cl per mole of CCl₄. To solve this question we must find the moles of CCl₄ in order to find the moles of Cl. Using Avogadro's number we can solve the chlorine atoms:

Moles CCl₄: 153.82g/mol

100g * (1mol / 153.82g) = 0.65 moles CCl₄

Moles Cl:

0.65 moles CCl₄ * (4 moles Cl / 1mol CCl₄) = 2.6 moles Cl

Atoms Cl:

2.6 moles Cl * (6.022x10²³ atoms / mol) =

1.566x10²⁴ atoms of Cl

Question is in picture

Answers

Dont click on that link it is a scam

Using the periodic table, choose the more reactive nonmetal.
Te or o

Answers

Te is the correct ok is this

Where are Gold, Limestone and kaiolin found.

Answers

Gold is usually found embedded in quartz veins, or placer stream gravel, The most common place to find limestone is beneath the marine waters. Ocean conditions form the rock as organisms, animal skeletons, and calcium carbonate combine, Kaolinite is a layered silicate clay mineral which forms from the chemical weathering of feldspar or other aluminum silicate minerals. It is usually white, with occasionally a red color impurity due to iron oxide, or blue or brown from other minerals.

True/False: Energy can’t be created or destroyed: it can only be transferred from one place to another.

Answers

Answer:

true

Explanation:

Answer:

True.

Explanation:

It is true that energy cannot be made or lost, but it can move. For example, if you touch a metal pole and get a static shock, then the energy from the pole is being transferred to you. However, energy was not made or lost in the process. So, energy cannot be made or destroyed, but it can be moved. This also means there was the same amount of energy in the universe as there was millions of years ago. Hope this helps!

Please help!
Explain how the Gray Wolf is a keystone species in the Yellowstone
National Park ecosystem.

Answers

Wolves are a censerious(critical) keystone species in a healthy ecosystem. By regulating prey populations, wolves authorize(enable) many other species of plants and animals to flourish. Without predators, such as wolves, the system fails to support a natural level of biodiversity.

True or false: The Earth's rotation causes the winds to curve.

Answers

Answer:

true

Explanation:

How many moles are in 46.7g of H2O gas?

Answers

46.7 g=total mass
18.02=18 g= H2O’ molar mass

46.7/18= 2.59.... moles =3 moles
Remember to round

how atoms form chemical bond discuss in detail

Answers

Answer:

Atoms form chemical bonds to make their outer electron shells more stable. An ionic bond, where one atom essentially donates an electron to another, forms when one atom becomes stable by losing its outer electrons and the other atoms become stable (usually by filling its valence shell) by gaining the electrons.

What is one thing that is the same about a mole of sodiums and a mole of carbons?
A) The weight
B) All of these
C) The total number of atoms
D) The mass

Answers

C the total number of atoms

When solving mass to mass stoichiometry problems, where do you get the molar ratio for the first and second chemicals?

Answers

In the mole ratio. If you have moles of one substance. And the coefficients from the balanced equation you can use the ratio to figure out the moles of the other compounds.

Which of the following radiations is attracted to the positive electrode?
a.Alpha and beta particle
b.Alpha particle and neutron
c.Photon
d.Beta particle

Answers

The best answer for this is C

8.
What domain does column A represent?

Archaea

Eukarya

Bacteria

Euryarchaeota

Answers

The answer is A because I did this before
A doing it rn hope I’m right

Hyperthermus butylicus is an aquatic prokaryote found near the coast of Portugal. It is found sand along the gas vents that release steam and carbon dioxide. In what domain would scientists classify this prokaryote?
A Eukarya
B Bacteria
C Archaea
D Fungi

Answers

they would classify it as c.


An Archaea

have a great day!

Which of the following is true concerning methane?
1)It is a gas at standard temperature and pressure.
2)It consists of one carbon atom and four hydrogen atoms.
3)It is the major component of natural gas.
4)all of the above

Answers

Answer:

4

Explanation:

at room temperature and standard pressure methane is a colourless gas. Methane consist of one carbon atom bonded to 4 hydrogen atom and it also forms the major percentage of natural gas

Regarding methane, it is true that:

It is a gas at standard temperature and pressure. It consists of one carbon atom and four hydrogen atoms. It is the major component of natural gas. All of the above

Let's consider which of the following is true concerning methane?

1) It is a gas at standard temperature and pressure. TRUE. Like most small hydrocarbons, methane is a gas at STP.

2) It consists of one carbon atom and four hydrogen atoms. TRUE. The chemical formula of methane is CH₄.

3) It is the major component of natural gas. TRUE. It represents about 95 mole % of natural gas.

4) All of the above. TRUE.

Regarding methane, it is true that:

It is a gas at standard temperature and pressure. It consists of one carbon atom and four hydrogen atoms. It is the major component of natural gas. All of the above

Learn more: https://brainly.com/question/2127750

The fictional element “Nt” contains atoms with two valence electrons. Which type of intermolecular force is most likely responsible for the properties of NtF2?
O dipole-dipole forces
O ion-ion forces
O hydrogen bonding
O dispersion forces

Answers

ion-ion forces

Nt has two valence electrons, and bonds with F to form NtF2. This means that the ion form of Nt is Nt2+. This means that NtF2 is an ionic compound.

How can you Weigh more on the earth than you would on the moon and still have the same mass in both places.

Answers

Answer:

Your Mass never changes but your weight can..

Explanation: This all depends on gravity..

Answer:

its because of gravity your mass doesn't change but the gravity does and the  gravity from earth and on the moon is way different.please choose me as brainliest

Which flows through the other?

Answers

Is there a picture, or.

3. Ca(OH)2 + 2HCI = Cacl. + 2HO

If you start with 29.0 grams of Ca(OH), and 12.5 grams of HCl how many moles of water can be formed? What is the limiting reagent?​

Answers

Answer:

https://download.cnet.com/1-Click-Answers/3000-2378_4-10060189.html

Explanation:

What is the chemical formula for this?

Answers

Answer:

-OOH

Explanation:

This forms an acid if it comes in contact with a metal

Answer:

HO2; Hydroperoxyl

Explanation:

Since there are two oxygen molecules, and one hydrogen molecule, it can be classified as a hydroperoxyl molecule.

It is an inorganic compound with the following characteristics

Covalent compound (O,H are nonmetals) Valence of O (O must form an octet): 6 Valence of H: 1 Total valence electrons: 13 Molar mass: 33.01 g/mol
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