Answer:
D
Explanation:
because it is being moved around
PLS HELP! What are examples of a chemical reaction?
Select all that apply.
a. O2(g) + O(g) → O3(g)
b. 2H2O(l) → 2H2(g) + O2(g)
c. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
d. CO2(s) → CO2(g)
Answer:
a , b , c are chemical equations
How many grams of carbon would be present in carbon monoxide that contains 2.6 grams of oxygen?
Answer:
1.95g
Explanation:
Find mass in CO
Find C mass
true or false Rutherford's nuclear atomic model explains why electrons fall into and collide with the nucleus
Answer:
false
Explanation:
False.
According to Rutherford's theory, an atom's nucleus is surrounded by electrons that are negatively charged. He also asserted that the electrons that surround the nucleus travel in a circular pattern at extremely high speeds. He gave these elliptical routes the name orbits.
Various nuclear atomic model types:Atomic Model by Dalton.
Atomic model by J.J. Thomson.
The atomic model of Rutherford.
Principle of Neil Bohr.
Various Atomic Models FAQs.
Examples of this group include the compound-nucleus model (qq. v.) and the liquid-drop model. Other nuclear models combine elements from the two groups, such as the collective model (q.v. ), which combines the liquid-drop mode and the shell model.
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Hi does anyone know?
Periodic table related question
Answer:
noble gases are in fact F
The weight of an object and its mass are always the same.
True
False
Answer:
While the weight of an object varies in proportion to the strength of the gravitational field, its mass is constant, as long as no energy or matter is added to the object. Therefore, false.
Explanation:
Answer:
The correct answer should be false
Explanation:
artificial selection is a way that people____evolution
A(speed up)
B(start)
c(stop)
D(slow down)
Answer:
A - speed up
Explanation:
Artificial selection, also called "selective breeding”, is where humans select for desirable traits in agricultural products or animals, rather than leaving the species to evolve and change gradually without human interference, like in natural selection.
How many Iron atoms are found in 25g of Iron(III)Oxide?
Answer:
dont know how many
Explanation:.
help please be the right answer
Answer:
it is the first one :)
Explanation:
im almost 70 percent sure its the first one, because you can describe motion with all of these. good luck !
Quarantine is sometimes used to prevent the spread of an infectious
disease. A trade-off associated with quarantine is that: *
people who are quarantined lose their freedom
the disease is less likely to be spread to other people
both a and b
none of the above
Answer:
both a and b
Explanation:
Which image shows a cumulonimbus cloud
1
2
3
4
Answer:
2
Explanation:
Answer:
2
Explanation:
i took the test on edg 2022 good luck on you test :)
a metallic object with atoms in a face-centered cubic unit cell with an edge length of 392 pm has a density of 21.45 g/cm^3. calculate the atomic mass and radius of the metal. identify the metal.
The metal = Platinum(Pt)
Further explanationFCC : Face centered cubic : the unit structures of the unit cell((other than BCC, HCP)
In FCC ⇒ atoms on every corner and side (total 4 atoms)
The length of the face diagonal (b) = 4 times the atomic radius (r)
Formula :
[tex]\tt b=4r[/tex]
[tex]\tt a=r\sqrt{8}[/tex]
[tex]\tt V=16r\sqrt{2}=a^3[/tex]
[tex]\tt \rho=\dfrac{n.Ar}{V.No}[/tex]
Ar = atomic mass, g/mol
No = Avogadro number = 6.02.10²³
n = number of atoms
V = volume (cm³)
a = side length
b = diagonal of the side surface
r = atomic radius
a= 392 pm=3.92 x 10⁻⁸ cm
ρ = 21.45 g/cm³
[tex]\tt V=a^3\\\\V=(3.92\times 10^{-8})^3\\\\V=6.024\times 10^{-23}~cm^3[/tex]
The atomic mass :
[tex]\tt 21.45~g/cm^3=\dfrac{4\times Ar}{6.024\times 10^{-23}\times 6.02\times 10^{23}}\\\\Ar=194.47\approx 195~g/mol[/tex]
radius :
[tex]\tt a=r\sqrt{8}\\\\3.92\times 10^{-8}=r\sqrt{8}\\\\r=1.386\times 10^{-8}~cm[/tex]
Element with atomic mass 195 g/mol and radius = 139 pm (1.386x10⁻⁸cm) = Platinum(Pt)
What of the following is characteristic of a metallic bond?
A. Electrons move freely among many metal nuclei.
B. Electrons are shared between two metal nuclei.
C. Electrons are transferred from one metal to another.
D. Electrons are attracted to a metal on another molecule.
Answer:
The correct answer is A) Electrons move freely among many metal nuclei
Explanation:
I just did it
Among all the given options, the correct option is option A which involve metallic bonding that is electrons move freely among many metal nuclei.
What is metallic bond?All elements strive to have eight electrons within their valence shell, which is their outermost electron shell. Atoms of all elements attempt to link with the other compatible atoms in order to get eight electrons for their valence shell. They either share electrons or donate electrons to create bonds.
Simple metals such sodium, which contribute an electron and receive a positive charge, then combine with other elements like chlorine, which receive an electron and receive a negative charge, to form compounds. Ionic bonds are this type of bond. Atoms such hydrogen and oxygen will occasionally share electrons to complete their valence shells.
Therefore, the correct option is option A.
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Two atoms with an electronegativity difference of 0.4 form a bond that is_____
a) ionic, because electrons are transferred
b) covalent, because electrons are shared
c) ionic, because electrons are shared
d) covalent, because electrons are transferred
Answer:
B) Covalent, because electrons are shared.
Two atoms with an electronegativity difference of 0.4 form a bond that is covalent bond because electrons are shared.
What is a covalent bond?Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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Precipitation formed when rain is repeatedly blown back up into the cloud and freezes in layers
A. Circulation
B. Precipitation
C. Sleet
D. Hail
Answer:
c
Explanation:
cause
Answer:
Hail
Explanation:
PLEASE HELP THIS IS DUE TODAY!!!!!!!!!
______________ are low energy waves found in the electromagnetic spectrum and ______________ are high energy waves found in the electromagnetic spectrum. (2 points)
Select one:
a. Gamma rays; radio waves
b. Microwaves; X–rays
c. Visible light; microwaves
d. Ultraviolet rays; radio waves
Answer:
Microwaves and X-rays
Explanation:
What is the difference between speed and velocity?
(a) magnitude
(b) direction
(c) nothing
Answer:
(B) direction
Explanation: Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
James was standing on a boat in deep ocean water. He wanted to see how long it would take a tennis ball to reach the shore if he threw one in from the boat. Why wouldn't this plan work?
Answer:
only the wave energy of the water moves
Explanation:
The plan will not work due to the fact that only the wave energy of the water moves and not the water itself.
The wave motion of water does not displace the water. It is only able to transfer energy from one point to another within the medium. Hence, the ball will hardly be displaced because the water itself does not move. However, it can get to the shore with the assistance of the water current.
can someone with this? I need someone to do the "THINK" or at least tell me what it's asking for. I Already did the questions in black. this book is from Abeka. 9th-grade science and matter.
Answer:
fx87tx97td97td7rdd86ts86rxt6x96rs86rs8yrs7rx6rx6rs6rsi6rsi6rsyfdfx87tx97td97td7rdd864s86rxt6x96rs86rs8yrs7rx6rx6rs6rs 44sx64sx6itxi6rx4sx6itxi6rx6irxi6rz6r44sx64sx6itxi6rx4sx6itxi6rx6irxi6rz6rz6r
Blank of substances depend on bond type.
Answer:
lonic bond i think
Explanation:
why we need to eat and the difference in heterotrophs and autotrophs?
In your own words
Answer:
Just a thing I need my brainliest!!
Explanation:
Also refered to as consumers, heterotrophs areorganisms that obtain their energy (nutrition) from organic compounds/materials.In other words, they are organisms that are unable to produce their ownfood (unlike autotrophs) and therefore have to consume/ingest organic compoundsas a source of energy. Compared to autotrophs (which occupy the base of thefood-web triangle), heterotrophs occupy the upper levels of the food web giventhat their survival is dependent on the producers
what is the orbital configuration of the aluminum (Al) Atom
The orbital configuration of the Aluminum is 1s²2s²2p⁶3s²3p¹.
What is an electronic configuration?The electron configuration can be explained as that how electrons are placed in different energy levels of an atom of an element. In the electron configuration, the number of electrons should be written as a superscript of electron atomic subshells. For example, the electron configuration of the Neon element is written as 1s²2s²2p⁶.
The principal quantum number (n) can determine the maximum number of electrons that can be filled in a particular electron shell. It is given by the formula 2n², where ‘n’ is principal quantum number.
The atomic orbitals of at energy must be fully filled before occupying an orbital at higher energy. The energy of the orbitals for the Al atom will be as 1s < 2s < 2p < 3s < 3p.
The atomic number of the Aluminum (Al) is 13 and the electronic configuration of aluminum is 1s²2s²2p⁶3s²3p¹.
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What would happen to a persons energy levels if the septum had a hole in it? Why?
Which substances will make a salt when combined?
Group of answer choices
Vinegar and tea
Soda and wine
Soda and ammonia
Fertilizer and detergent
Will give branliest Are the answers i put in this table correct
The ones in yellow are the ones I'm most confused about
(NH₄)₂S
(NH₄)₃P
(NH₄)₃N
CuS
Cu₃P₂
Cu₃N₂
Further explanation:For ionic compounds consisting of cations (ions +) and anions (ions -)
The naming is preceded by the cation then the anion with the -ide suffix added
Generally for this ion compound consists of metal elements as cations and non-metals as anions
Metal: cation, positively charged.
Nonmetal: negative anion.
The anion cation's charge is crossed
Cation : NH₄⁺, Anion : S²⁻⇒ Compound : (NH₄)₂S
Cation : NH₄⁺, Anion : P³⁻⇒ Compound : (NH₄)₃P
Cation : NH₄⁺, Anion : N³⁻⇒ Compound : (NH₄)₃N
Cation : Cu²⁺, Anion : S²⁻⇒ Compound : CuS
Cation : Cu²⁺, Anion : P³⁻⇒ Compound : Cu₃P₂
Cation : Cu²⁺, Anion : N³⁻⇒ Compound : Cu₃N₂
potassium has a 1+ charge and oxygen has a 2- charge a lewis dot diagram should contain 2 potassium atoms and 1 oxygen atom to show how these atoms form an ionic bond
true
false
Between which of these pairs of elements is a covalent bond most likely to form?
Carbon and fluorine
magnisium and oxygen
sodium and chlorine --im leaning towards this one
potassium and calcium
Answer:
The correct option here is the first option
Explanation:
Covalent bond is the bond that involves the sharing of electrons between the participating atoms. The electrons (in the outermost shells of the atoms) that are involved this sharing are called the "shared pair" while those electrons (in the outermost shells of the atoms) that are not involved in this sharing are called the "lone pair". Bonding eventually leads to each of the participating atoms achieving it's octet configuration.
Carbon will bind covalently with fluorine (to form carbon tetrafluoride) with each of the electrons on the outermost shell of the carbon been shared covalently with fluorine atoms (that also requires just one electron to achieve it's octet configuration). Thus, at the end, we would have one carbon atom being covalently linked to four flourine atoms.
How many significant digits does 4530.0234 have
Answer:
8
Explanation:
The reason these zeros are considered is because it shows the accuracy to which the value has been taken.
-Hope this helped
Which image represents the step in mitosis when chromosomes condense and spindle fibers form?
Answer:
The answer is A
Explanation:
I did the unit test review
How many atoms of carbon are in 6.00g of carbon?(Mm of carbon is
12g/mol)
3.01 × 10²³ atoms C
General Formulas and Concepts:Chemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:Step 1: Define
6.00 g C
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of C - 12.01 g/mol
Step 3: Convert
[tex]6.00 \ g \ C(\frac{1 \ mol \ C}{12.01 \ g \ C} )(\frac{6.022 \cdot 10^{23} \ atoms \ C}{1 \ mol \ C} )[/tex] = 3.00849 × 10²³ atoms C
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
3.00849 × 10²³ atoms C ≈ 3.01 × 10²³ atoms C
Which of the following is a characteristic of a weak acid?
O A. It is not as dangerous as a strong acid.
O B. It is less concentrated than a strong acid.
O c. It does not dissociate completely in water.
O D. It does not conduct electricity in water.
Acids are capable of donating the proton ion in the solution. The weak acid is incapable of dissociating completely in the aqueous solution. Thus, option C is correct.
What are weak acids?Weak acids are the category of acids that like acids can donate hydrogen or the proton ion to other substances in the solution. Though they differ in the acidic strength which makes them incapable of dissociating their ions fully.
The weak acids cannot completely ionize themselves in water and hence shows less acidic strength than the stronger acids. They have pH between 5-7 and are incapable of dissociating completely. Acetic acid, citric acid, lactic acid, etc, are weak acids.
Therefore, option C. the weak acids do not dissociate completely in water is correct.
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