Which Of The Following Is The Symbol For An Element?Co2Ch4CH2o (2024)

Answer:

23 moles Oxygen × 6.02 × 1023 atoms = 1.3846 × 1025 atoms Oxygen.

Explanation:

Answer:

B. pure substance

Explanation:

A chemical reaction is the only way to separate a(n) ✔ pure substance.

Answer:

Kr

Explanation:

Just took the test

Answer:

Water. Chemical Formula: H2O.

Table Salt. Chemical Formula: NaCl.

Sucrose (Sugar) Chemical Formula: C12H22O11.

Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.

Toothpaste. Chemical Formula: CaCO3 or NaF.

Explanation:

Answer:

The answer is c radio --> infrared --> ultraviolet --> gamma

Explanation:

I just did it

Answer:

C

Explanation:

just did it

Answer:

4.06×10^23

Explanation:

1 mole has 6.023×10^23 molecules

0.675 moles have (6.023×10^23×0.675) molecules

Answer:

Unicellular organisms do not have levels of organization. Unicellular organisms need fewer resources and some can live in harsh conditions. They are very small and are easily eaten by other organisms

Explanation:

Answer:

Dicalcium phosphate. (I'm sure meant for the "o" to be an "a" for Calcium).

Explanation:

I hope this helps! :D Have a nice night!

Answer:

B: Mercury

Explanation:

Yuh

Answer:

GCATACGT

Explanation:

A=T

G=C

C=G

T=A

This key goes with any complementary DNA strand.

Hope this helps you out!

Answer:

1) Measure initial masses of the crucible and cover with and without the hydrate.

2) Use a Bunsen burner to heat and dry the hydrate, repeating until the mass no longer decreases.

3) Measure the final masses of the crucible, cover, and anhydrous salt.

4) Compute differences in masses to find the reactants and products.

5) Use stoichiometry to convert these masses to moles.

6) Use the numbers of moles to compute the mole ratio.

7) Use the mole ratio to write the hydrate’s formula.

Explanation:

A hydrate is any substance that contains water of crystallization. The water of crystallization constitutes part of the mass of the substance. When heated to constant mass, the substance looses its water of crystallization and becomes anhydrous.

The mass of the anhydrous substance is now obtained by weighing again and subtracted from that of the hydrated substance. The masses are converted to moles using stoichiometry and the moles are then used to obtain the formula of the hydrate.

Answer: answers in order from top to bottom

2

3

4

1

6

5

7

Explanation: right on edg

Answer:

C

Explanation:

The answer is in the image.

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Walk in faith and trust in God!

Answer:

d

Explanation:

it just makes sense

Answer:

Cold temperatures!

Explanation:

Both planets are very far from the sun, now to explain how the other answers would fit or just dont make sense, No rings, the answer isn't the best fitting answer for this question, 27 moons, this is wrong because neptune has 14 moons, only uranus has 27. No axis tilt, this answer is wrong because both planets have an axis.

Answer:

28.1

Explanation:

plez give me brainliest

Mass of Lithium = 1443.73 g ≈ 1.4 kg

Further explanation

The mole is the number of particles(molecules, atoms, ions) contained in a substance

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

The number of atoms of Li = N=1.25 x 10²⁶

mol Li(n) :

[tex]\tt n=\dfrac{N}{No}\\\\n=\dfrac{1.25\times 10^{26}}{6.02\times 10^{23}}\\\\n=2.08\times 10^2[/tex]

mass Li (Ar=6.941 g/mol)

[tex]\tt mass=mol\times Ar\\\\mass=208\times 6,941\\\\mass=1443.73~g[/tex]

It was loss of nutrients, I think

Explanation:

The quarry was dug up and vegetation started dying. The quarry was probably rich with nutrients

Please brainliest !! ❤️

Answer:

Kinetic energy increases.

Explanation:

Kinetic energy is energy you get from moving. The equation for KE depends on mass as well as velocity. If you increase one of these factors, KE will increase too.

The given question is incomplete. The complete question is :

Welding is an industrial process that is used to join pieces of metal. A certain mixture of gases used in welding is composed of carbon dioxide and argon. The partial pressure of carbon dioxide is 0.080 atm and the partial pressure of argon is 0.24 atm. What is the total pressure of the mixture.

Answer: 0.32 atm

Explanation:

According to Dalton's law, the total pressure is the sum of individual pressures.

[tex]p_{total}=p_{CO_2}+p_{Ar}[/tex]

Given : [tex]p_{total}[/tex] =total pressure of gases = ?

[tex]p_{CO_2}[/tex] = partial pressure of carbon dioxide = 0.080 atm

[tex]p_{Ar}[/tex] = partial pressure of argon = 0.24 atm

putting in the values we get:

[tex]p_{total}=0.080atm+0.24atm[/tex]

[tex]p_{total}=0.32atm[/tex]

Thus the total pressure of the gases is 0.32 atm

The investigation designs that explain the heat transfer when atoms directly touch have been the hand touching the handle of the pan sitting on the lit bunsen burner. Thus, option D is correct.

Heat has been the energy that can neither be created nor destroyed. The heat energy can be transferred from one body to another with the transfer of atomic energy.

The atoms of an object gaining energy start to vibrate and transfer the energy to another atom that is in close proximity to the vibrating atoms.

The boiling of water in a pan by sitting it onto the bunsen burner has been an example of the transfer of heat energy. The heat energy of the burner has been transferred to the atoms of the pan that resulting in the boiling of the water in the pan. It has been the transfer of energy in an object.

By touching the pan, the energy of the pan has been transferred to the body. Thus the transfer of energy takes place between two different objects.

Thus, the example of heat transfer between two different objects has been the transfer of energy from the bunsen burner to the pan, and from touching the pan by hands, the energy has been transferred to the hands, Thus, option D is correct.

For more information about the heat transfer, refer to the link:

https://brainly.com/question/802617

Answer:

C) Boiling point because it is an intensive property.

The statement describes a property that will be the same for both students is (B). mass because it is an extensive property Hence Option (B) is correct.

What is an Extensive Property ?

A property known as an extensive property depends on the quantity of materials in a sample. A couple of instances of extensive attributes are mass and volume.

According to how a property varies as the system's size changes, physical qualities of materials and systems are sometimes classified as either intensive or extensive.

Therefore, The statement describes a property that will be the same for both students is (B). mass because it is an extensive property Hence Option (B) is correct.

Learn more about Extensive Property here ;

https://brainly.com/question/12937142

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Answer:

The Answer is D: A star and orbiting planets

Explanation:

Not to be confused with the Big Bang theroy (which "explains" the origin of the universe) The Neublar Theory explains the formation of the solar system, which is bascially A star and orbiting planets.

I hope this answers your question, Have a blessed day and Happy holidays

❄️☃️

Answer:

can't do much

Explanation:

baking soda;8,alkaline

bleach:12,alkaline.

coffee:5.10,acidic

co*ke;co*ke,acidic

milk;6.9,acidic.

lemon juice;2,acidic

this is all i can do.

Explanation:

Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms. The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit.

Answer:

3.37 × 10²³ molecules

Explanation:

Given data:

Mass of C₆H₁₂O₆ = 100 g

Number of molecules = ?

Solution:

Number of moles of C₆H₁₂O₆:

Number of moles = mass/molar mass

Number of moles = 100 g/ 180.16 g/mol

Number of moles = 0.56 mol

Number of molecules:

1 mole contain 6.022 × 10²³ molecules

0.56 mol × 6.022 × 10²³ molecules /1 mol

3.37 × 10²³ molecules

Answer:

0.18× 10²³ molecules

Explanation:

Given data:

Mass of copper hydroxide = 3.30 g

Number of molecules = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 3.30 g/97.56 g/mol

Number of moles = 0.03 mol

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

0.03 mol × 6.022 × 10²³ molecules / 1mol

0.18× 10²³ molecules

Answer:

14.99 mols of CO2

Explanation:

STP= 273 k , 1 atm , .0821 gas constant

N=PV/RT

N= 1x336/.0821x273

14.99 mols of CO2

659.6 grams of CO2

The equilibrium constant(Kc) is equal to the concentration of the products over the concentration of the reactants, and each coefficient of the compound in an equilibrium state

Further explanation

The equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised

solid (s) and liquid (l) have no concentration, so these two phases are not involved in the equilibrium constant KC (given the value = 1).

The equilibrium constant based on concentration (Kc) in a reaction

pA + qB -----> mC + nD

[tex]\tt Kc=\dfrac{[C]^m[D]^n}{[A]^p[B]^q}[/tex]

1. N2(g) + O2(g) ⇌ 2NO(g)

[tex]\tt Kc=\dfrac{[NO]^2}{[N_2][O_2]}[/tex]

2. N2(g) + 3H2(g) ⇌ 2NH3(g)

[tex]\tt Kc=\dfrac{[NH_3]^2}{[N_2][H_2]^3}[/tex]

3. 2SO2(g) + O2(g) ⇌ 3SO3(g)

[tex]\tt Kc=\dfrac{[SO_3]^3}{[SO_2]^2[O_2]}[/tex]

4. 2Fe(S) + 4H2O(g) ⇌Fe3O4(s) +4H2(g)​

[tex]\tt Kc=\dfrac{[H_2]^4}{[H_2O]^4}[/tex]

Answer:

Group 1 metals or the alkali metals

Explanation:

The group 1 elements are all metals except for hydrogen, the first element in the group. Group 1 metals have one valence electron in their outermost shell. The metallic character increases as one goes down the group.

The metallic character of an element is determined by how readily it loses electrons. Elements that lose electrons most easily have the greatest metallic character. Group 1 metals have the greatest metallic character due to the ease with which they donate or lose their one valence electron. As the atomic radius increases on going down the group, their metallic character increases. Also, due to screening effect of the inner electrons on the valence electron from the positive nuclear charge of the nucleus, metallic property increases on going down the group.

Answer:

42 19 K→42 20 Ca+e−

Explanation:

Naturally-occurring potassium atoms have a weighted average atomic mass of 39.10 (as seen on most modern versions of the periodic table.) Each potassium atom contains 19 protons p+ and thus an average potassium atom contains about 39.10−19≈20 neutrons n0.

This particular isotope of potassium-42 contains 42 nucleons (i.e., protons and neutrons, combined;) Like other isotopes of potassium 19 out of these nucleons are protons; the rest 42−19=23 are therefore neutrons.