Answer:
The hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
Explanation:
Let's evaluate each case.
1. Nitrogen (N₂):
With Z = 7, nitrogen has the following electronic configuration
1s²
2s² 2p³ → valence electrons
Since its valence electrons are 5, in the molecule one nitrogen atom shares 3 electrons with the other one, and each remains with an electron pair, so each atom has an octet of electrons.
2. Hydrogen (H₂):
With Z = 1, its electronic configuration is:
1s¹ → valence electron
In the molecule, the hydrogen atoms share the only electron they have, so they will have only 2 electrons around. In this diatomic molecule, we can not find an octet.
3. Oxygen (O₂):
Z = 8. Electronic configuration:
1s²
2s² 2p⁴ → valence electrons
In the diatomic molecule, each oxygen atom shares 2 electrons with the other one and remains with 2 pairs of electrons, therefore, each oxygen atom has an octet.
4. Fluorine (F₂)
Z = 9. Electronic configuration:
1s²
2s² 2p⁵ → valence electrons
In this molecule, each fluorine atom shares 1 electron with the other and remains with 3 pairs of electrons, hence, each fluorine atom has an octet of electrons around.
Finally, we can say that the hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
I hope it helps you!
What causes an earthquake to happen?
A. O Rocks deform slowly as a result of physical stress.
B. O Rocks along a fault move suddenly and release energy.
C. Large amounts of rock suddenly shift downward when large holes form
underground
D. O Energy is transferred to rock layers from convection currents in the oceans
and the atmosphere.
1. The molecular mass of hydrochloric acid (HCI) is 36.5 g/mol. How many moles of HCl are in 120g of HCI?
Answer:
3.3 mol HCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Using Dimensional AnalysisExplanation:
Step 1: Define
120 g HCl
Step 2: Identify Conversions
Molar Mass of HCl - 36.5 g/mol
Step 3: Convert
[tex]120 \ g \ HCl(\frac{1 \ mol \ HCl}{36.5 \ g \ HCl} )[/tex] = 3.28767 mol HCl
Step 4: Check
We are given 2 sig figs as our lowest. Follow sig fig rules and round.
3.28767 mol HCl ≈ 3.3 mol HCl
1. If you need to name the alkane C7H16, which prefix and
suffix do you use? What sort of meaning do those prefix and
suffix convey?
The name is heptane. The prefix is hept- , because the longest carbon chain contains seven carbons. The suffix is -ane, because this is the suffix used for all alkanes.
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Need help. Is this correct
Answer:
Yes, that is correct!
Explanation:
Answer:
Yes
Explanation:
A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms. These electrons are simultaneously attracted by the two atomic nuclei. A covalent bond forms when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.
BOYLES LAW
GUYS PLZ HELP ME WITH THESE TWO
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use the formula p1v1= p2v2
for 1
300×300=500×x
x=180ml
Please help......A 0.01 g bullet travels with a velocity of 1500 m/s. What is its momentum?
Answer:
hope this helps you
Explanation:
Example 1: A 20 kg object has a velocity of 4.5 m/s in the positive x direction. ... What is the momentum of a 3000 kg truck traveling at 25 m/s? 2. A 1500 kg ferryboat has a momentum of 25000 kg∙m/s. ... *A 0.01 kg bullet has a speed of 700 m/s before it strikes a 0.95 kg wooden block ... We will be going outside so please.
Is it possible for two different compounds to be made from the exact same two elements? Why or why not? With a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?
PLEASE HELP ASAP
Thank you!!
Answer:
Yes. The two elements can combine to form different compounds.
Explanation:
Two elements can combine at different ratios.
Consider CO and CO₂. Both are made from carbon and oxygen. However, C and O combine at a 1:1 ratio in CO but at a 1:2 ratio in CO₂. CO is a fuel; it burns in the air. CO₂ does not burn in the air; it is used to put out fires and is found in extinguishers. CO and CO₂ are two distinct compounds.
There are many ways for the elements to combine with each other. As a result, the first twenty elements on the periodic table alone can produce a large number of compounds.
which type of stress causes rocks to fold?
A.) compression
B.) shearing
C.) strike-slip-
D.) tension
Answer:
A. compression
Explanation:
the rock is unable to move causing it to stress
Answer: a. Compression
2 Na + Cl2 --> 2 NaCl
According to the balanced equation above, how many Lof Cl2 at STP are
needed to completely react with 25.0 g Na?
Answer:
12.208 L
Explanation:
We'll begin by calculating the number of mole in 25 g of Na. This can be obtained as follow:
Mass of Na = 25 g
Molar mass of Na = 23 g/mol
Mole of Na =?
Mole = mass /Molar mass
Mole of Na = 25/23
Mole of Na = 1.09 moles
Next, we shall determine the number of mole of Cl2 required to react with 1.09 moles of Na. This can be obtained as follow:
2Na + Cl2 –> 2NaCl
From the balanced equation above,
2 moles of Na reacted with 1 mole of Cl2.
Therefore, 1.09 moles of Na will react with = (1.09 × 1)/2 = 0.545 mole of Cl2.
Thus, 0.545 mole of Cl2 is needed for the reaction.
Finally, we shall determine the volume of Cl2 required for the react as follow:
Recall: 1 mole of any gas occupy 22.4 L at STP.
1 mole of Cl2 occupied 22.4 L at STP.
Therefore, 0.545 mole of Cl2 of Cl2 will occupy = 0.545 × 22.4 = 12.208 L at STP.
Therefore, 12.208 L of Cl2 is needed for the reaction.
whats the diffrence beetween fluids and nonfluids
Answer:
One is a fluid and one is not.
Explanation:
Fluid is a common state of certain substances, or a type of matter. Liquid is one of the three phases or state of matter. Fluids flow and has some viscosity (thickness). Liquids also flows and it has volume, but no definite shape. A non fluid is a substance that is not a liquid.
Answer:
one is limited and one isn't
How many chlorine atoms are on the products side of the reaction 2 Li +
MgCl2 → 2 LiCl + Mg?*
Answer:
2 chlorine atoms on the product side.
An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?
Answer:
No of protons = 15
Explanation:
Given that,
Atomic number = 15
Mass number = 31
We need to find the no of protons in the atom.
We know that,
No of protons = Atomic no of the atom
No of protons = 15
Hence, there are 15 protons in the atoms.
Which of the definitions below is best for the word molecule? Atoms of different elements chemically joined together More than one atom chemically joined together A type of compound More than one atom of the same type chemically joined together A group of atoms together
Answer: More than one atom of the same type chemically joined together
Explanation:
An atom is the smallest unit of any matter which may or may not have independent existence. Example: Argon (Ar) is an element which exist as Ar atom only.
Molecule is the smallest unit of any matter which always have independent existence. For example: Hydrogen (H) is an element which can exist in nature as [tex]H_2[/tex] molecule only.
Atoms of different elements chemically joined together is called as a compound. Example: [tex]H_2O[/tex] is a compound formed by chemical combination of hydrogen (H) and oxygen (O) atom.
A student adds 3.00 g of dry ice (solid CO2) to an empty balloon. What will be the volume of the balloon at STP after all the dry ice sublimes (converts to gaseous CO2)?
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Answer:
um you can have your opinions
Explanation:
I have actually :) he is indeed bae whats your favourite song?
Describe how a nuclear power plant work? And what makes nuclear fuel?
Answer:
Nuclear power plants use heat produced during nuclear fission to heat water. In nuclear fission, atoms are split apart to form smaller atoms, releasing energy. Fission takes place inside the reactor of a nuclear power plant. At the center of the reactor is the core, which contains uranium fuel
Explanation:
what should we use in soap making process:-
a) potassium hydroxide
b) sodium hydroxide (lye)
Explain why it should be used
Answer:
a) potassium hydroxide
Explanation:
Potassium Hydroxide is a type of lye specifically used to make liquid soap.
Sodium hydroxide(lye) is used to unclog drains.
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Deoxyribonucleic acid is also referred to as
The answer is nucleic acid
Answer:
(DNA) is a molecule that encodes an organism's genetic blueprint
Explanation:
Deoxyribo Is the D
nucleic Is the N
acid Is the A
{DNA}
Hope that helps :)
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Answer:
3 times ....
group 2
Explanation:
How would I fill out this chart?
Answer:
[Top row] - Chemical bonds
[2nd Row L-R] - Force, Ionic, Covalent
[3rd Row L-R] - Atoms, Lost or Gained, Shared
[4th Row L-R] - More stable, Metal and Nonmetal, Nonmetal and Nonmetal
Explanation:
Chemical bonds are a force that hold together atoms in a substance to make compounds more stable.
Chemical bonds include two kinds: Ionic and Covalent.
Ionic in which electrons are lost or gained where attraction is between a Metal and Nonmetal.
Covalent in which electrons are shared where attraction is between a nonmetal and nonmetal.
I have been able to fill the concept map using the correct terms or phrases. The concept map talks about chemical bonds. There are two types of chemical bonds; which ionic bond and covalent bond.
Please help me label this.
Answer:
+ - protons
the green one- nutrons
black ones- electron
the rings are the energy level
The middle layer is the nucules
Which of these common substances is a mixture?
A Sulfur
B Pure Water
C Spagettios
D Nitrogen
Answer:
D
Explanation:
A is a compound
B is purified water
C is a substance made by two substances
Hope this helps
Sodium atom with electronic configuration 2,8,1 achieves stable electronic configuration by losing one electron thereby achieving stable electronic configuration of the nearest Noble gas
(argon/ neon/ helium).
Which chemical equation represents a decomposition reaction?
O A. 2C2H6 + 702 + 4CO2 + 6H20
O B. AgNO3 + LiCl → AgCl + LINO3
O C. Ca + MgS → CaS + Mg
O D. 2H20 2H2 + O2
Decomposition reaction D. 2H20⇒ 2H2 + O2
Further explanationEvery chemical reaction involves a compound consisting of reactants and products
Reactants are compounds that react and form new compounds called products
There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.
A. 2C2H6 + 702 ⇒ 4CO2 + 6H20
Combustion : reaction of Hydrocarbon and Oxygen
B. AgNO3 + LiCl → AgCl + LINO3
Double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product
C. Ca + MgS → CaS + Mg
Single replacement :one element replaces the other elements of a compound to produce new elements and compounds
D. 2H20⇒ 2H2 + O2
Decomposition : One compound breaks down into 2 components
Decomposition, often known as rot, is the breakdown of dead organic matter into more basic organic or inorganic components such as carbon dioxide, water, simple sugars, and mineral salts. Here among the given options, the decomposition reaction is 2H₂O→ 2H₂ + O₂. The correct option is D.
Decomposition reactions occur when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input. For instance, the thermal breakdown of potassium chlorate (KClO₃) is a typical technique used in laboratories to generate oxygen gas.
Soft drink carbonic acid breaks down to release carbon dioxide gas. As water breaks down, gases like hydrogen and oxygen are released. Food digestion is a response to breakdown.
Thus the correct option is D.
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Select the correct location on the image.
Which of these four elements is the most reactive metal?
Explanation:
the answer is rubidium
Answer:
the answer is Rb
Explanation:
i got it right
what is the mass of 1.25 mol of zinc
Answer:
1 mole is equal to 1 moles Zinc, or 65.38 grams.
Explanation:
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2. For the graph to the left, what is the independent variable? ___
3. For the graph to the left, what is the dependent variable? ___
Answer:
Independent is x, which is the time.
Dependent is y, which is the distance.
What can you find on the periodic table?
A. the chemical formula for salt
B. the number of hydrogen atoms that are in a molecule of water
C. all the compounds that exist in the universe
D. all the elements that have been discovered
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Answer:
High mass star.
Explanation:
The mass of a star defines its life span. the least massive stars will live the longest and the most massive stars will use their fuel in a few million years and end in a spectacular supernova.
What do you think causes a lunar eclipse? (Use your knowledge of solar eclipses and feel free to run the Gizmo to help you.)
Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.
Answer:
A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.
Explanation:
