Answer:
False, since boiling is a physical change of state. Although it is at 100°C, it is not a chemical property.
Explanation:
Hope this helped!
The sodium atom loses an electron to form a sodium ion (Na+). Which statement is correct with respect to its atomic radius? A. The sodium ion has a larger radius than the atom. B. The sodium ion has a smaller radius than the atom. C. The sodium ion and the sodium atom radii are the same size. D. The sodium ion has twice the radius of the sodium atom.
Answer:B. The sodium ion has a smaller radius than the atom.
Explanation:
Because size of cation is less than neutral atom
Jesus is coming soon you guys need not repent today not tomorrow every day counts now repent today.....
Valence electrons
Fill in the blanks
Answer:
Valence electrons or outer electrons are most important as they participate in bonding. The octet rule states that atoms gain, lose, or share valence electrons to have filled energy levels.. this gives atoms a stable configuration like that of the nearest noble gas.
__ bonds are formed when __ atoms __ their electrons to ___ atoms. (its fill in the blank) the words i have to use to fill the spaces are Molecular Covalent Metal Non-Metal give up share pls help lol
Answer:
Covalent (molecular) bonds are formed when electrons are shared between non metal atoms
Explanation:
A chemical bond is the attraction between atoms, ions or molecules of different or the same element that enables the formation of chemical compounds.
Covalent (molecular) bonds are formed when electrons are shared between non metal atoms. Covalent bonds help the atoms to reach a stable state.
Example of covalent bonds are carbon monoxide (CO), iodine monobromide (IBr), H2 (hydrogen) and so on
Name the following compound: RbI
RbI means Rubidium Iodide
Limiting line of balmer series result when electron jumps from orbitImmersive Reader
A) 3 to 2
B) ∞ to 2
C) 4 to 5
D) ∞ to 1
Answer:
A) 3 to 2
Explanation:
The Balmer series refers to all transition series of spectral emission lines of the hydrogen atom in which an electron moves from any higher energy level within the atom down to the energy level with principal quantum number n=2.
The Balmer series was originally calculated using the Balmer formula, this is an empirical equation first deduced by Johann Balmer in 1885.
Hence, a transition from n=3 level to n=2 level is in the Balmer series.
A student uses a magnet to move a 0.0 25 KG metal ball the magnet exerts a force of five in which causes the body to begin moving what is the acceleration of the ball when it begins to move
Answer:
The acceleration of the ball when it begins to move is 200 m/s²
Explanation:
The given parameters are;
The mass of the metal ball, m = 0.025 kg
The force exerted by the magnet on the ball, F = 5 N
From Newton's second law, F = m × a
Where;
a = The acceleration of the ball
Therefore, by substitution, we have;
5 = 0.025 × a
a = 5/0.025 = 200 m/s²
The acceleration of the ball when it begins to move = 200 m/s²
True or false
The central core of an atom is called the hub.
I think its true.
Explanation:
.....
Answer:
False
Explanation:
The center core of an atom is called the nucleus.
Write how you would read the following word equation:
hydrochloric acid + sodium acetate --> acetic acid + sodium chloride
Answer:
Step-1:write the reaction.
HCl+NaOH ----->NaCl+H₂O
Step-2:In the left side, we have
H
Cl
Na
O
Explanation:
Which best describes reclamation? the planting of trees to reestablish forest lands the protection of a land area to prevent it from being damaged or changed the designing of a community with residential and commercial properties located close to each other the process of returning a land area to the condition it was in before humans used the land
Answer:
the process of returning a land area to the condition it was in before humans used the land
Explanation:
Reclamation refers to the process of returning a disturbed ecosystem to its original status prior to the disturbance. Often times, the disturbance regimes that change the conditions of the ecosystem are created by humans.
Reclamation is unlike reforestation in that the latter involves the process of planting trees in order to reestablish forest lands, not necessarily return the land to its previous status.
Reclamations are often done to return lands to the original flora and fauna status before the disturbance regime.
ASAP will give brainliest!!!!
Fluorine belongs to group 17. How many covalent bonds are formed between two fluorine atoms?
Your answer:
1
2
3
4
Answer:
1
Explanation:
fluorine's atomic number is 9
electronic configuration: 2,7
so it needs 1 electron to stabilise
that's why 1 covalent bond
hope it helps!!
Rock denotation in science
Answer:
I think you meant rock defination in science
Explanation:
A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks.
or
A rock is a solid made up of a bunch of different minerals. Rocks are generally not uniform or made up of exact structures that can be described by scientific formulas. Scientists generally classify rocks by how they were made or formed. There are three major types of rocks: Metamorphic, Igneous, and Sedimentary.
I will give you brain list please don’t put whatever if you just want the answer for points put I don’t know
Answer:
its B
Explanation:
Answer: the answer is B
Explanation:
Which of the following is not a property of water? (3 points)
a
Hydrogen bonding causes a high surface tension.
b
Hydrogen bonds exist only in the solid state.
c
Water can dissolve ionic and polar molecules.
d
Water's solid state is less dense than its liquid state.
Answer:
B. Hydrogen bonds exist only in the solid-state
Explanation:
Hydrogen bonds are basically the attraction between water molecules so it has to occur in water obviously. though hydrogen bonding exists between water molecules and not within them, it is what brings water together and doesn't let it float around like vapor (water in its gas state). so hydrogen bonds do NOT exist only in a solid-state
The statement that is not a property of water is: "Hydrogen bonds exist only in the solid state"
WHAT IS HYDROGEN BOND?
Hydrogen bonds are a type of weak electrostatic bonds that results from the interaction between an hydrogen atom (electropositive) and another electronegative atom e.g oxygen, chlorine etc.HYDROGEN BOND IN WATER MOLECULES:
Water molecule is a polar molecule, hence, the hydrogen atom of one water molecule is attracted to the electronegative oxygen atoms of another water molecule , resulting in the formation of HYDROGEN BOND. The hydrogen bonds that forms between water molecules causes a high surface tension.Water molecules can exist as a liquid, gaseous and solid molecule, therefore, hydrogen bonds cannot be formed only in the SOLID STATE. This makes the statement untrue.Hydrogen bonds do not exist only in the solid state but the three states of matter as evidenced in water.
Learn more: https://brainly.com/question/3464712
What is one main difference between nuclear fission, nuclear fusion, and nuclear decay? A. Nuclear decay occurs spontaneously as a random event. B. Nuclear decay is initiated by adding a large amount of energy. C. Neutrons are only present in nuclear fission reactions. D. Smaller nuclei are produced following nuclear fusion.
Answer:
A.
Explanation:
I think, I hope it helps
If Tins’s mass number is 119 and it’s atomic number is 50, how many neutrons are in the nucleus of an atom of tin?
Answer:69
Explanation:cause ima boss
The needles of an evergreen tree are most similar to what part of other trees?
Answer:
the leaves i think
Explanation:
i had this on a test once.
State the formation of carbon dioxide as a product of complete combustion of carbon-containing products
Fossil fuels contain carbon (C) and hydrogen (H). During complete combustion carbon and hydrogen combine with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). During incomplete combustion part of the carbon is not completely oxidized producing soot or carbon monoxide (CO).
Answer:
Explanation: i think this is the answer
2 Na + Cl2 → 2 NaCl
How many grams of Cl2 are needed to completely react with 46.5 grams of Na?
g of Cl2
Grams of Cl₂ needed : 71.781 g
Further explanationReaction
2 Na + Cl₂ → 2 NaCl
mass of Na = 46.5 g
mol of Na(Ar=23 g/mol) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{46.5}{23}=2.021[/tex]
From equation, mol ratio of Na : Cl₂ = 2 : 1, so mol Cl₂ :
[tex]\tt \dfrac{1}{2}\times 2.021=1.011[/tex]
Mass of Cl₂(MW=71 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=1.011\times 71\\\\mass=71.781~g[/tex]
a system for measuring a substance level of acidity or alkalinity
Answer:
The answer is a pH scale.
Explanation:
The pH of a solution is a measure of its acidity or alkalinity (base) and the pH scale ranges from 0 to 14. Also, a pH indicator is called litmus paper ( a paper treated with natural water-soluble dye, to test how much acid or base (alkalinity) is in a solution! (hope this helps and I found this by searching it up but I tried to reword it to avoid plagarism)
Which electromagnetic wave has the highest frequency?
A) infrared
B) microwaves
C) radio waves
D) ultraviolet
Answer:
D) ultraviolet
Explanation:
Out of these, ultraviolet have the highest frequency.
The order of frequency from highest to lowest is gamma rays, x-rays, ultraviolet, visible light, infared, microwave, radio.
Answer: D) ultraviolet
Explanation:
edge 2021
An element that is brittle but is a moderate conductor of electricity is classified as a.... non-metal, metal or metalloid, metalloid, metal
Answer:
non metal
Explanation:
HOPE THIS HELPS!!!
Given the nuclear equation below, this equation is an example of
1. alpha decay
2. beta decay
3. fission
4. fusion
Answer:
2. beta decay
Explanation:
hope it helps
Help please
How many grams in 7.57 moles of Calcium Nitrate (Ca(NO3)2)
According to mole concept there are 1242.14 g in 7.57 moles of calcium nitrate .
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.
Mass of calcium nitrate is calculated from number of moles formula as, mass= number of moles ×molar mass
On substitution in above formula , mass=164.088×7.57=1242.146 g
Thus, 1242,146 g is present in 7.57 moles of calcium nitrate.
Learn more about moles,here:
https://brainly.com/question/20486415
#SPJ2
Which metal gets coated during electroplating? A. The metal with electrons flowing from it
B. The metal that is the cathode
C. The metal that is the anode
D. The metal with ions coming off it
Answer: The metal that is the cathode (B)
Explanation:
because i am so smart STAN BLACKPINK! listen to HOW YOU LIKE THAT!
Another structure that most cells have in common is a _____________________ in the center of the cell, which contains the blueprints for the cell's growth and reproduction.
Answer:
NUCLEUS
Explanation:
Firstly, the BLUEPRINT of life in living cells is the DNA, which stores the information that encodes the synthesis of products (proteins) that are needed by the cell for growth and reproduction. This DNA is located in a structure in eukaryotic cells called NUCLEUS.
The NUCLEUS is the organelle present in the center of eukaryotic cells, which which contains DNA, which is regarded as the blueprints for the cell's growth and reproduction. Note that, the most cells being referred to in this question are EUKARYOTIC CELLS as prokaryotic cells do not contain a NUCLEUS.
ASAP. Which pair of elements will form an ionic bond.
1. carbon and oxygen
2.carbon and chlorine
3.nitrogen and oxygen
4.barium and chlorine
PLEASE HELP!!!!!!!
What is Charles' Law?
Answer:
Charles's law (also known as the law of volumes) is an experimental gas law that describes how gases tend to expand when heated
Explanation:
hope it helps...
Many repeating, simple subunits are joined together. What is the most likely
O a halogen
O a polymer
O a monomer
an amino acid
Answer:
O a polymer
Explanation:
When many repeating simple subunits are joined together, this results into a polymer.
The simplest unit or smallest unit of any substance is called a monomer. When many units of a monomer joins together, a polymer results.
For proteins, the monomeric unit is amino-acid. When they combine they form longer chain molecules called proteins. For carbohydrates, the monomeric unit is called glucose. When they are combined they give us a wide range of carbohydrate molecules.Answer:
B: a polymer
Explanation:
If the pressure on the surface of water in the liquid stato
is 47 kPa, the water will boil at
A) 0.0°C
B) 40°C
C) 80°C
D) 101.3°C
The water will boil at C) 80°C
Further explanationGiven
Vapour pressure of water = 47 kPa
Required
Boiling point of water
Solution
We can use the Clausius-Clapeyron equation :
[tex]\tt ln(\dfrac{P_1}{P_2})=\dfrac{-\Delta H_{vap}}{R}(\dfrac{1}{T_1}-\dfrac{1}{T_2})[/tex]
Vapour pressure of water at boiling point 100°C=101.325 kPa
ΔH vap for water at 100°C=40657 J/mol
R = 8.314 J/mol K
T₁=boiling point of water at 101.325 kPa = 100+273=373 K
Input given values :
[tex]\tt ln\dfrac{101.325}{47}=\dfrac{-40657}{8.314}(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\0.7682=4890.1852(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\0.0001571=(\dfrac{1}{373}-\dfrac{1}{T_2})\\\\\dfrac{1}{T_2}=0.00283\rightarrow T_2=353~K=80^oC[/tex]
