Answer:
in copper from different plastics because appliances of codes to power day in wire copper the cover to use to plastic
Which of the following is an example of a chemical property?
a. color
b. density
c. phase
d. the ability to rust
Which formula compares a sample of a gas under two different conditions of pressure and volume, if the temperature is constant?
⚪︎ x/y = k
⚪︎ xy = k
⚪︎ PV = k
⚪︎ V/T = k
⚪︎ P1V1 = P2V2
Answer:
Explanation:
V/t
4. What is the substance called that dissolves the other substance in a solution?
a. Soluto
b. Mixture
c. Solvent
d. Concentrator
Answer:
Solvent
Explanation:
When one substance dissolves into another, a solution is formed. A solution is a homogeneous mixture consisting of a solute dissolved into a solvent
When water is heated a physical change occurs and it forms steam. When a lighted splint is applied to hydrogen gas, a chemical change occurs producing water in the form of steam. Explain how these two statements show two differences between physical and chemical changes.
Answer:
- A new substance was formed in the chemical change while no be substance was formed in the physical change
- The chemical change involved a change in chemical composition while the physical change involved no change in chemical composition
Please find the explanation below.
Explanation:
A physical change is a change that does not alter the chemical content of the substances involved, hence, no new substances are produced while a chemical change alters the chemical composition, hence, new substances results.
In this question,
- Water is heated till it forms steam is characterized as a physical change
- Lighted splint is applied to hydrogen gas to produce water in the form of steam is characterized as a chemical change.
- The first process is a PHYSICAL CHANGE because it involved only a change of state i.e. from liquid to gas, hence, no alteration to the chemical composition of the molecule and also no new substance is produced.
- The second process is a CHEMICAL CHANGE because there was a chemical combination of hydrogen gas and the oxygen in the lighted splint to yield water molecules ( a new substance). Therefore, it involved a chemical reaction and formation of a new substance
HELPP ASAP PLEASE SEE IMAGES
Answer:
1st paragraph:
1.compound 2.physical 3.elements 4.water 5. gas 6.white 7. season 8.ratio 9.formula 10.elements 11.atoms 12.subscript 13.one
2nd paragraph
1.stable 2.many/reactive 3.eight 4.helium 5.seven 6.outer 7.one 8.level 9. compounds 10.reactive 11. seven 12. Eight 13.lose 14.gain 15. Share 16.compounds 17. atoms
Explanation:
I just did the 1st page. Gimme a min and I'll do the second.
Which of the following electron configurations correspond to an excited state? Identify the atoms and write the full, ground state electron configuration where appropriate.
1s22s23p1
1s22s2sp6
1s22s22p43s1
[Ar] 4s23d54p1
Electron configurations correspond to an excited state is 1s₂, 2s₂, 3p₁.The electrical configuration 1s₂, 2s₂, 3s₁ demonstrates that the atom is in the excited state.
What is electronic configuration ?The distribution of an atom's or molecule's electrons in atomic or molecular orbitals is known as the electron configuration in atomic physics and quantum chemistry.
An electron is in an excited state when it momentarily possesses an energy level higher than its ground state. If an electron receives more energy, such as when it absorbs a photon, or packet, of light, or collides with an adjacent atom or particle, it can become excited.
The primary distinction between a system's ground state and excited state is that a system's ground state is any condition in which its electrons are at their lowest potential energy levels, whereas an excited state is any state in which they are at an energy greater than the system's ground state.
Thus option A is correct.
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The electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]
corresponds to excited states whereas [tex]1s^2\ 2s^2\ 3p^6[/tex] corresponds to ground state. The correct answer is option 2.
The electron configuration of an atom describes how its electrons are distributed among the various energy levels and orbitals.
The electron configuration [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex] corresponds to an excited state. This configuration indicates that one of the electrons in the 2p orbital has been excited to a higher energy level.The electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of the noble gas argon (Ar).The electron configuration [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 3s orbital has been excited to a higher energy level.The electron configuration [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]corresponds to an excited state. This configuration indicates that one of the electrons in the 4p orbital has been excited to a higher energy level.Therefore, the electron configurations [tex]\rm 1s^2\ 2s^2\ 3p^1[/tex], [tex]\rm 1s^2\ 2s^2\ 2p^4\ 3s^1[/tex], and [tex]\rm [Ar] 4s^2\ 3d^5\ 4p^1[/tex]correspond to excited states, while the electron configuration [tex]1s^2\ 2s^2\ 3p^6[/tex] is the ground state configuration of argon. Option 2 is the correct answer.
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Compare the modern model of an atom to the atomic model proposed by John Dalton in 1805
Answer:
See explanation
Explanation:
Dalton's atomic theory furnished us with a basis to discuss the theory of atoms. However, not all his ideas holds up under the scruitiny of morden science.
He postulated that atoms were 'indivisible' the discovery of subatomic particles indeed show that there are smaller particles than atoms.
His postulation that atoms can neither be created nor destroyed does not hold water today because atoms are being created in nuclear reactors.
He said that atoms of all elements are exactly alike. Today we know there are isotopes of elements which are not exactly alike.
We can see that the Dalton's atomic theory did not take cognisance of the important role of subatomic particles in studying the structure of the atom. Modern atomic theory tries to look at the importance of these particles in the understanding the structure of the atom.
An ion of calcium has a charge of 2+. The ion contains 18 electrons. How many protons does a neutral atom of calcium possess?
18
20
36
2
2
Answer:
Explanation:
The ion and the neutral atom both contain 20 protons. Generally the protons stay in the nucleus forever.
Which of the following salts has a 3 to 2 ratio of cations to anions?
O Barium Nitride
O Barium sulfide
Barium chloride
O Barium oxide
Explanation:
kind of ion formed (anion or cation) and the size of the ionic charge. ... O-‐2 oxide. S-‐2 sulfide. N-‐3 nitride. P-‐3 phosphide. Table 3.1. Common, simple anions. It is critically important that you distinguish between ...
Ions and Ionic Compounds – Introductory Chemistry – 1st Canadian Edition - BC Open Textbooks
opentextbc.ca › chapter › ions-and-ionic-...
The formula Na 2Cl 2 also has balanced charges, but the convention is to use the lowest ratio of ions, which ... For the ionic compound between magnesium cations (Mg 2+) and oxide anions (O 2−), again we need only ...
[PDF] Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLE FORMULAS: A chemical formula shows the elemental composition of a sub
www.eiu.edu › eiuchem › forms › t...
Ba2+ barium. HSO3. – hydrogen sulfite. MnO4. – permanganate. Al3+ aluminum. SO4. 2– sulfate. NO2. – nitrite. Sn2+ tin(II). HSO4. – hydrogen sulfate. NO3. – nitrate. Sn4+ tin(IV). S2O3. 2– thiosulfate. OH– hydroxide.
Symbols and Charges for Monoatomic Ions
www.edu.xunta.es › portal › Nomenclature
Cs+ cesium ion O2- oxide. Be2+ beryllium ion S2- sulfide. Mg2+ magnesium ion Se2- ... one K+ and one Cl¯ are required. The resulting formula is KCl. Example 3: Write the formula from the following name: barium
Barium chloride salts has a 3 to 2 ratio of cations to anions. thus option C is correct.
what are the properties of barium chloride ?Barium Chloride an inorganic salt which is composed up of barium cations (Ba2+) and chloride anions (Cl–), otherwise named as Barium Muriate or Barium dichloride.
It is a white solid , water-soluble, hygroscopic and gives a slight yellow-green color to a flame, extensively used in the industry mainly The sulfate is used in white paints where as Barium chloride is poisonous in nature.
It is soluble in water which dissociate into barium cations and chloride anions in its dissolved state, However, the solubility of this compound in water is temperature-dependent.
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5(a) Consider the following schemes
Petroleum
>petroleum fractions
Higher petroleum fractions 1 , petrol + x
X + Y MI >CH,CICH,CI
nX"V (CH2 - CH2 - CH2-CH2)n
(i) State the type of reaction involved in I to IV
Answer:
is number 1
Explanation:
cause i know
Which of the following reactions would result in increased entropy?
Answer:
A option
Explanation:
Because recatants are in solid form having less enetropy and products are liquid form having more entropy
While other options reactants and products are in same phase gas phase having same entropy
The reaction that would result in increased entropy is the combustion reaction;
KNO3(s)--->K+(aq)+NO3-(aq). Option A
This is further explained below
What is a combustion reaction?Generally, a combustion reaction is simply a combustion process that occurs when a material combines with oxygen gas, producing energy as light and heat.
In conclusion, the chemical reaction KNO3(s)--->K+(aq)+NO3-(aq) is has all properties of a combustion reaction as the solid reactants gives an aq solution.
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Name the three stress forces that cause changes in Earths crust. Explain how each type of force affects rock.Identify the type of fault that each force produces. This is science i couldnt find a science thing
Answer:
Shear
Tension
Compression
Explanation:
The 3 stress forces are;
-shear
-tension
-compression
1) Shear is the stress force that pushes back a mass of rock in two opposite directions which in turn will produce strike - slip faults.
2) Tension is the stress force that pulls on the crust thereby stretching in a manner that it becomes thinner at its middle which in turn will produce normal faults.
3) Compression is the stress force that makes rocks squeeze until they fold or break and this will in turn produce reverse faults.
Based on the information in the table, which two elements are most likely in the same group, and why?
hey what's the value of pi till
5 digits after decimal
Answer:
Pi to 5 decimals is 3.14159-
Brainlist pls!
P.S. It's a repeating number, but you can just put a (-), so that you don't have to type the whole thing out.
Answer:
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What types of radiation cause the parent isotope to change into a different element?
Answer:
Beta decay is most common in elements with a high neutron to proton ratio. Gamma decay follows the form: In gamma emission, neither the atomic number or the mass number is changed. A high energy gamma ray is given off when the parent isotope falls into a lower energy state.
Explanation:
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What happens when the number of electrons and protons inside of an atom are Not equel?
Hello, It's me Moriah Elizabeth!
Answer:
When the number of electrons does not equal the number of protons, the atom is ionized.