Answer:
Initially, the aluminum atom had a charge of +13 + (−13) = 0; in other words, its charge was neutral due to the equal numbers of protons and electrons. When it becomes an ion, it loses 3 electrons, leaving behind only 10. Now the charge is +13 + (−10) = +3.
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An electron jumps down from the fourth energy level to the first energy level and releases a light wave of 10.8 nm in wavelength. Determine the energy level value for the fourth energy level for the atom
Answer:
-20.2 * 10^-18 J
Explanation:
From;
E = hc/λ
h= planks constant = 6.6 * 10^-34 Js
c= speed of light = 3 * 10^8 ms-1
λ = wavelength = 10.8 * 10^-9 m
Substituting values;
E = 6.6 * 10^-34 * 3 * 10^8/ 10.8 * 10^-9
ΔE = -1.8 * 10^-17 J
But for ground state E1=−13.6eV or -2.176 * 10^-18 J
From;
ΔE = E4 - E1
E4 = ΔE + E1
E4 = (-1.8 * 10^-17) + (-2. 176* 10^-18)
E4 = -20.2 * 10^-18 J
Which chemical equation below is balanced to follow the Law of Conservation of Mass?
2 H2 + Cl2 > 3 HCl
2 H2 + 2Cl2 > 2 HCl
H2 + Cl2 > 2HCl
H2 + Cl2 > HCl
Answer:
H₂ + Cl₂ → 2HCl
Explanation:
The equation that is balanced and follows the law of conservation of mass is:
H₂ + Cl₂ → 2HCl
Based on the law of conservation of mass "in a chemical reaction, matter is neither created nor destroyed but they combine with one another".
It suggests that the number of species on both sides of the expression must be the same.
For the given reaction:
H₂ + Cl₂ → 2HCl
Reactant side Product side
H 2 2
Cl 2 2
why do chemical equations have to be equal
Answer:
Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.
Explanation:
YW :)
(04.01 LC)
Fill in the blank with the correct number to balance the equation: __KCIO3 - 2KCI +
302. (Enter only a whole number.) (3 points)
Which manufacturing process is shown in the photograph?
A Combining
B. Separating
c. Forming
D. Conditioning
The manufacturing process shown in the photograph is a process of forming. The correct answer is option C.
Manufacturing processes refer to the series of steps or operations involved in converting raw materials or components into finished products. These processes are designed to transform the materials into the desired shape, form, or functionality.
The photograph shows that, the substance is poured in a mold to create a product of specific geometry. In this case, it is a cube. This process is known as forming processes. It includes techniques like bending, stamping, or forging, which involve shaping materials by applying pressure or manipulating them through dies or molds.
Therefore, the photograph shows the manufacturing process is a process of forming. Option C is the correct answer.
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Describe what happens to kinetic energy of the molecules when temperature increases.
Answer:
When the temperature of an object increases, the average kinetic energy of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object increases as its temperature increases.
Explanation:
That is all I know.
Write the number of atoms and name of each element in each chemical formula. Use the periodic table
in Canvas for assistance or you may Google Periodic Table.
(Example: CuNO3 - Copper + 3 oxygen
Hi can someone please help me ? I’ll give you brainlest I just started 6th grade I really need help
Explanation:
Sugar=12 carbon+22 Hydrogen+11 oxygen
marble =Calcium+Carbon×3 oxygen
Natural gas=Nitrogen +4 Hydrogen
Rubbing Alcohol=3 carbon +8 Hydrogen+Oxygen
Glass=Silicon +2 oxygen
Answer:
12 Carbon + 22 Hydrogen + 11 Oxygen
Calcium + Carbon + 3 Oxygen
Carbon + 4 Hydrogen
3 Carbon + 8 Hydrogen + Oxygen
SIlicon + 2 Oxygen
Explanation:
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(URGENT!!!!!) the electron configuration of some elements are given. Based on the electron configuration which ELEMENTS can likely form ions with multiple charges?
a) zinc [Ar] 3d¹⁰4s²
b) iron [Ar] 3d⁶4s²
c) sodium [Ne] 3s¹
d) cobalt [Ar] 3d⁷ 4s²
e) silver [Kr] 4d¹⁰ 5s¹
Answer:
iron (Ar) 3d^6 4s^2 and cobalt (Ar) 3d^7 4s^2
Based on the electron configuration of elements Fe and Co can likely form ions with multiple charges.
What is electron configuration?Electron configuration of an element describes how electrons are distributed in its atomic orbitals. Electron configurations of atoms follow a standard notation in which all electron-containing atomic subshells (with the number of electrons they hold written in superscript) are placed in a sequence.
Electron configuration can be written according to the following rules-
1. Aufbau Principle
2. Pauli's exclusion principle
3. Hund's rule
Electrons will be filled according to the increasing order of the energy as per the n+l rule.
Given,
a) zinc [Ar] 3d¹⁰4s²
b) iron [Ar] 3d⁶4s²
c) sodium [Ne] 3s¹
d) cobalt [Ar] 3d⁷ 4s²
e) silver [Kr] 4d¹⁰ 5s¹
Except Co and Fe, all the elements when loose 1 or 2 electrons form full filled electrons, Fe and Co show +2, +3, +4 etc oxidation states.
Therefore, Based on the electron configuration of elements Fe and Co can likely form ions with multiple charges.
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8. The following system contains 20.0 psi each of gases A and B in the end bulbs with an evacuated bulb in the centre. Both stopcocks are opened at once. What is the new overall pressure in the system?
I literally have no idea how to even start this, I know that the answer is 13.3 psi, but I don't have any clue why or how to get there.
Answer:
13.3
Explanation:
Before opening the stopcocks you have 40psi in total.
After that, those 40psi will be divided into 3bulbs, so 40/3=13.3psi for the system.
what is carbogen and it's uses
Vocab Term
Letter of matching definition
Definition
Proton
E
A) An element containing a charge.
Neutron
K
B) The defined distances away from the nucleus that electrons exist.
Electron
M
C) The electrons exclusively on the outermost energy level
Neutral
L
D) A model of the atom that shows rings for energy levels and the total number of electrons in each energy level
Ion
E) A subatomic particle found in the nucleus with a positive charge
Cation
I
F) A negatively charged ion
Anion
F
G) The different shaped zones where electrons can be found most of the time but have undefined paths within.
Energy Level
L
H) A model of the atom that simply shows the element abbreviation and the number of valence electrons
Orbital
D
I) A positively charged ion
Valence Electrons
J) A model of the atom that shows the truest shape of the atom by showing orbitals stacked on top of each other to form layers of energy levels.
Quantum Mechanical Model
J
K) A subatomic particle found in the nucleus with no charge
Bohr’s Model
L) The state of an atom having no charge
Lewis Dot Structure
H
M) A subatomic particle found outside of the nucleus with a negative charge.
Answer:
E
Explanation:
took the test
PLEASE HELP!!!!! NEED HELP ASAP!!!!!
Write the chemical formula for the covalent compounds below
EXAMPLE- dinitrogen trioxide= N2O3
nitrogen monoxide =
dihydrogen oxide =
diphosphorus pentoxide =
sulfur trioxide =
Answer:
down below
Explanation:
NO
H20
P4O10
SO3
1. NO
2. H2O
3. P4O10
4. SO3
PLEASE HELP ME!!!!
Answers are below the sentence
Answer:
Mass
Explanation:
Help pls. Are they a pure substance or mixture?
Answer:
Pizza is difintly a mixture the other i have no idea..im pretty sure CO2 is a substance btw im sorry I wish I could help more Hope this helps! :)
Explanation:
Answer:
Mixture
?
Pure
Pure
Pure
Pure
Mixture
Mixture
Pure
Pure
Mixture
Pure
Explanation:The answers are on google. Im not sure what they mean by hunter.
NH4, C032. OH", and PO43- are all examples of
Answer:
the popultion of it
Explanation:
NH₄+ , (CO₃)₂- , OH- , (PO₄)₃- are all examples of polyatomic ions.
What are Polyatomic ions?A covalent bound type of collection of two or more atoms or of a metal complex that can be said as behaving as a single unit and that has a net charge which is not zero is referred to as a polyatomic ion or a molecular ion.
Depending on the terminology , a polyatomic ion may or may not be referred to as a molecule. The Greek word poly- that means "many," although even ions made of just two atoms are frequently referred to be polyatomic.
A polyatomic ion may also be referred to as a radical (or less commonly, as a radical group).
The term "radical" today refers to a variety of free radicals, which are species with an unpaired electron and do not require a charge.
The hydroxide ion, which has the chemical formula OH- and is made up of one oxygen and one hydrogen atom and has a net charge of 1, is a straightforward example of a polyatomic ion.
A nitrogen atom, four hydrogen atoms, and a charge of +1 make up an ammonium ion, which has the chemical formula NH₄+.
In the context of acid-base chemistry and the production of salts, polyatomic ions are frequently helpful.
A polyatomic ion is frequently thought of as the conjugate base or acid of a neutral molecule. For instance, the polyatomic hydrogen (H₂) sulphate anion (SO₄) is the conjugate base of sulfuric acid (H₂SO₄). The sulphate anion (SO₄)₂ is created when another hydrogen ion is eliminated.
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carol accidentally dropped a container of salt and sodium chloride, into a container of a dark grey metal. carol is pretty sure that the gray metal is iron fillings. using the table above, help carol seperate the two substances
Explanation:
The best way to separate the mixture is by using a bar magnet. We explore the magnetic property of the iron fillings in the mixture to separate it out.
The mixture is spread out thinly on a flat surface. A bar magnet is hovered above the spread of the mixtureThe magnet attracts the iron fillings to itself This will leave the salt behind in the mixture.whats the mass of neon
Answer:
20.17 (or if you want to round .18)
Explanation:
If you ever need help with this again the atomic mass is the number underneath the element name
What does an oxygen atom do when becoming an ion?
Centripetal acceleration is in a
Why do lunar and solar eclipses not happen every month?
-Eclipses only occur during full and new moons.
-Earth rotates around its axis faster than the moon.
-The moon and Earth only travel through the penumbras.
-The moon’s axis does not always align with Earth’s shadow.
Answer:
i think its the last one
Anatoms of an element with atomic number 48 and mass number 120
contains
What are the names, symbols, and atomic numbers of the nonmetal elements that are NOT gasses?
i have the most potential energy if i am
Answer:
travel the world in one day
What kind of molecule can experience hydrogen bonding?
A. A nonpolar molecule containing a hydrogen atom
B. A molecule with hydrogen bonded to any nonmetal
C. A molecule with hydrogen bonded to O, N, or F
D. Any polar molecule containing a hydrogen atom
Answer:
Answer is C
Explanation:
C - A molecule with hydrogen bonded to O, N, or F
A molecule with hydrogen bonded to O, N, or F can experience hydrogen bonding. Therefore, the correct option is option C.
A hydrogen atom is attracted to another electronegative atom in a neighbouring molecule when it is connected to a strongly electronegative atom (O, N, or F). This attraction is more powerful than the usual dipole-dipole interactions between polar molecules.
The enormous electronegativity differential between hydrogen and the highly electronegative atom causes hydrogen bonding. The electronegative atom attracts the shared electrons in the covalent link, causing the hydrogen atom to gain a partial positive charge.
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Which statement best describes the particles in a sample of H2O in the solid phase?Immersive Reader
(10 Points)
They move very quickly and rarely interact.
They move very quickly and frequently collide.
They vibrate in place and have very weak bonds.
They vibrate in place and have very strong bonds.
Answer:
You can describe, the state, the color, the texture, and the odor of matter using your senses. ... As the motion of particles continues to increase, they move even farther apart. ... For example water is normally a liquid at room temperature. When it ... Gases have the most kinetic energy because their particles move very quickly.
Explanation:
Hopefully this helps!
Answer:
They vibrate in place and have very strong bonds.
Explanation:
All solids, in their form, have particles that vibrate in place and strong bonds to keep their form.
Read this excerpt from Eleanor Roosevelt’s "What I Hope to Leave Behind."
As I see it we can have no new deal until great groups of people, particularly the women, are willing to have a revolution in thought; are willing to look ahead . . . are willing to give up constant competition.
By repeating the phrase “are willing” three times, Roosevelt creates a tone of
politeness.
firmness.
triumph.
cooperation.
Answer:
triumph
Explanation:
Because women had been fighting so much that she feels triumphant that they will succeed and they are willing to continue until they reach success
Answer:
triumph
Explanation:
i got it right
If you want to warm 3.10 g of water from 56.4 C to 82.4 C, how many calories would you need to add to the water?
Answer: 80.6
Explanation:
q = mcAt
we have the grams of water, temp change, and specific heat of water is 4.186 J/g so we can plug in our numbers to find the heat energy in joules
q = (3.10)(4.184)(82.4-56.4)
q= 337.2304 J
we need our answer to be in calories so divide our answer by 4.184 and we get 80.6 calories
The amount of calorie required to warm 3.10 g of water from 56.4°C to 82.4°C is 80.6 calories.
HOW TO CALCULATE CALORIES:
The amount of calories can be calculated by using the formula as follows:Q = m × c × ∆T
Where:
Q = amount of heat in caloriesc = specific heat capacity (J/g°C)∆T = change in temperature (°C)m = mass (g)According to this question, c = 4.184J/g°C, m = 3.10g, ∆T = 82.4°C - 56.4°C = 26°CQ = 3.10 × 4.184 × 26Q = 337.23JSince 1J = 0.2390057361 calories337.23 J = 80.6calories.Therefore, amount of calorie required to warm 3.10 g of water from 56.4°C to 82.4°C is 80.6 calories.Learn more at: https://brainly.com/question/8097823?referrer=searchResults
The element with the smallest iconic radius in the alkaline earth metals is
Answer:
Metal.
Explanation:
Metal has the smallest iconic radius in the alkaline earth metal.
What wave properties do x-rays and gamma rays possess that cause them to have such high energy?
Answer:
Waves with a very short wavelength, high frequency and high energy
Explanation:
Un estudiante de noveno año decide realizar varias mezclas de compuestos quimicos y tiene un frasco rotulado con la formula quimica: MgO ¿cual es el nombre del compuesto?
Answer:
- Oxido de magnesio
Explanation:
Mg → magnesio
O → oxígeno
La unión del oxígeno (no metal) con un metal, forma el determinado óxido que se nombra como óxido de .... y el no metal.
En este caso, podemos deducir que el contenido del frasco es de óxido de magnesio, aunque viendo que hay un sólo átomo de oxígeno podemos llamarlo como monóxido de magnesio, similar al CO (monóxido de carbono).
A partir de que el magnesio sólido entre en contacto con el aire, se produce MgO de acuerdo a la siguiente reacción:
2Mg + O₂ → 2MgO