Explain the importance of valence electrons in chemical bonding.
Answer:
Explanation: Understanding valence electrons is key to understanding chemical bonding. Delocalized valence electrons produce metallic bonds (bonds between atoms of metals) which give metals unique properties such as conductivity and ductility (draw metal into wires)
Help! Please help in a hurry!
Answer:
Expiremental group for -first one. Second one-2
Explanation:
I Had Those QuestIons On mY tEsttt!!
Which statement best describes John Dalton's use of creativity in his work? He reinterpreted and retested Joseph Proust's results. He used a philosophy to conduct his experiment. He recorded his results as four parts of the atomic theory. He rejected Democritus's idea that matter was composed of atoms.
Answer: The correct statement is that,
'He reinterpreted and retested Joseph Proust's results'
Explanation:
John Dalton was an English chemist who contributed greatly to the field of Chemistry. He published his theory about atom in 1808.
Dalton was the first person to recognize a workable distinction between the fundamental particle of an element (atom) and that of a compound (molecule). The atomic theory generally summaries the laws of chemical composition which includes:
--> law of constant composition and
---> law of multiple proportions.
John Dalton was being creative in his work by reinterpretation and retesting of Joseph Proust's results. Joseph Proust was a French chemist that first discovered the law of constant composition in 1794. This means that many has started working on the atoms before John Dalton discovery.
From the previous works of Proust, he had studied tin oxides and found that their masses were either 88.1% tin and 11.9% oxygen or 78.7% tin and 21.3% oxygen (these were tin(II) oxide and tin dioxide respectively). Dalton retested and noted from these percentages that 100g of tin will combine either with 13.5g or 27g of oxygen; 13.5 and 27 form a ratio of
Dalton reinterpreted it by finding an atomic theory of matter that could elegantly explain this common pattern in chemistry – in the case of Proust’s tin oxides, one tin atom will combine with either one or two oxygen atoms. I hope this helps, thanks.
Answer:
A.) He reinterpreted and retested Joseph Proust's results
Explanation:
To what pressure must a gas be compressed in order to get into a 3.00 cubic foot
tank the entire weight of a gas that occupies 400.0 cu. ft. at standard pressure?
Answer:
133.3atm
Explanation:
Given parameters:
Initial volume = 400ft³
Final volume = 3ft³
Initial pressure = 1atm
Unknown:
Final pressure = ?
Solution:
To solve this problem, we apply Boyle's law which states that "the volume of a fixed mass of a gas varies inversely as the pressure changes if the temperature is constant".
Mathematically;
P₁V₁ = P₂V₂
P and V are pressure and volume
1 and 2 are initial and final states;
Insert parameters and solve;
1 x 400 = P₂ x 3
P₂ = 133.3atm
how is sonoluminescence similar to what we see in fireworks?
Answer:
Explanation:
Sonoluminescence is a phenomenon in which small gas bubbles burst to produce light when intense sound wave is introduced. Thus, it can be said that sound energy is converted to light energy here. This is similar to the process of how fire crackers work except that sonoluminescence occurs in a liquid medium while firecrackers work in solid media. In firecrackers, when the tip is lit with fire, the initial explosion is caused by the expansion of some nitrogen and carbon present in some constituent compounds, this explosion produces heat which causes some other constituent chemicals in the firecracker to quickly react and produce light. Thus, this can also be said to convert sound energy to light energy and are thus similar to what occurs in sonoluminescence.
I need help please （o´・ェ・｀o）
Tantalum: 2
Niobium: 3
Dubnium: 1
Please make brainliest ?
Question 1: A blocked-off meander eventually becomes
A)an oxbow lake.
B)part of the stream again
C) alluvial fan
D)rejuvenated.
Question 2: As the velocity of a stream decreases, which transported particle size would settle to the stream’s bottom first?
A) slit
B) clay
C)pebble
D) sand
Write the chemical formula for gold (I) sulfide.
Answer
Au2s
please mark me as brainlist
Equilibrium reactions will go back and forth depending on how many reactants or products there are.
False or True
Geologists use the law of to determine the superposition relative ages of sedimentary rock layers
True or False?
What is the charge of this atom?
65 protons
60 electrons
A)-5
B)+5
C)0
Answer:
B. +5
Explanation:
what further observation led mendeleev to create the periodic table
Answer:
;,knbbbknnbkhbln bhbj k; b; m j
Explanation:
Which of the following is not a controllable risk factor?
a. smoking
b. inactivity
c. aging
d. over eating
Answer:
C) Aging
Explanation:
You can't stop that or change the rate that you age at. its inevetable :D
Speed of 5km. Pls help
Answer:
It's either A. or B. Im going with B. since the person is walking a constant speed
Explanation:
acceleration is basically when someone or something is increasing in speed
Which of the following is a subsurface event that takes place during the rock cycle?
Group of answer choices
Cementing
Erosion
Melting
Weathering
Answer:
Melting
Explanation:
Could not have been erosion because erosion happens on the surface.
Could not have been weathering because weathering happens on the surface.
So we only have Cementing and Melting left....
The answer is melting, I got 100% on my test.
Hope this helps!!!! :D
Please give brainliest!!!
Answer:
D
Explanation:
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
define atomic number
Answer:
the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
which type of electromagnetic radiation has the shortest wavelength?
A: Microwaves
B: Radio waves
C: Ultraviolet light
D: Visible light
The subject is science
Answer:
Explanation:
It's radio waves because the higher the frequency, the shorter the wavelength. From crest to crest, the wavelength of a radio wave is the shortest. The longest would be ultraviolet light, then visible light, then microwaves! And since radio waves have the highest frequency out of any of them, it has the shortest, look up photoelectron spectroscopy and you'll see! Hope it helps!
Etiquetas de productos de casa formula química, nombre de la formula, y el nombre del producto. Ejemplo NaCL, Cloruro de sodio, sal.
Answer:
Azucar, bicarbonato de sodio, lavandina, vinagre, amoniaco.
Explanation:
Podemos numerar estos compuestos
Azucar → Sacarosa → C₁₂H₂₂O₁₁
Lavandina → Hipoclorito de sodio → NaClO
Vinagre → Ácido acético → CH₃COOH
Bicarbonato de sodio → NaHCO₃
Amoníaco → NH₃
When the dry ingredients of a cake are combined, what is the result? A.Element B.Mixture C.Compound D.Atom
A combination of dry ingredients of a cake results in a mixture.
A mixture is a combination of substances that are only physically but not chemically combined.
Mixtures are different from elements, compounds, and atoms because:
elements are pure substances consisting of a single type of atomcompounds are a mixture of different elements that are chemically combinedatoms are the smallest particle of an element.More on mixtures can be found here: https://brainly.com/question/24898889?referrer=searchResults
Answer:
Its mixture
Explanation:
Pls give me brainly ...
How is stoichiometry used to calculate energy absorbed when a mass of liquid boils?
Answer:
b
Explanation:
Stoichiometry is used to calculate energy absorbed when a mass of liquid boils is Grams liquid xmol/gx∆Hvap.
What is stoichiometry?Stoichiometry is a branch of science that deals with the relationship that occur between the products and reactants in a reaction base on the mass and volume of substances involved.
Therefore, Stoichiometry is used to calculate energy absorbed when a mass of liquid boils is Grams liquid xmol/gx∆Hvap.
Learn more about stoichiometry below.
https://brainly.com/question/16060223
#SPJ2
Will give extra points and brainliest if you go in the comments and answer a few other questions
Answer:
5,293 km, A
Explanation:
B has no coma.
C is too overly touchy
Answer:
b
Explanation:
Identify the type of reaction depicted below:
2SO2(g)
+
O2(g) --> 2SO3(g)
Answer:
Combination reaction
Explanation:
In Chemistry, elements and compounds are involved in a process called chemical reactions, which are of different types namely: combination, decomposition, double replacement, combustion etc. A combination reaction is that reaction in which two or more substances called the REACTANTS combine together to form a single new substance called the PRODUCT.
In this case, a reaction is depicted as follows:
2SO2(g) + O2(g) --> 2SO3(g)
In this reaction, compound SO2 combines chemically with element O2 to form a single new compound SO3. Hence, this is a type of COMBINATION REACTION.
Are ionic compounds not carrying a charge?
Answer:
yes they carry charges
Question 6 (1 point)
Sound, earthquakes, and waves in water are rechanical waves because they require
a physical to transport energy. (Lesson 4.02)
O electromagnetic field
O disturbance
O medium
location
Answer: The answer is MEDUIM
Explanation:
6. Which of the following element pairs would most likely form an ionic compound? (5pts)
a. Ca and Ni b. Cu and Ar c. F and S d. Zn and K e. Na and Cl f. V and O g. He and Xe h. Sn and Na i. C and Br j. Sr and P k. Cr and I l. Ag and NO 3
Answer:
b
Explanation:
Which expression is equal to the number of grams (g) in 2.43 kilograms (kg)?
2.43 kilograms times StartFraction 1000 grams over 1 kilogram EndFraction.
2.43 grams times StartFraction 1 kilogram over 1000 grams EndFraction.
StartFraction 1 over 2.43 kilograms EndFraction times StartFraction 1000 grams over 1 kilogram EndFraction.
StartFraction 1 over 2.43 kilograms EndFraction times StartFraction 1 kilogram over 1000 grams EndFraction.
Answer:
A. 2.43 kg x 1000 g/1 kg
Explanation:
I said so
how many moles is ( 1 x 10^9 ) molecules O2
Answer:
The answer is
[tex]1.66 \times {10}^{ - 15} \: \: moles[/tex]
Explanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\ [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{1 \times {10}^{9} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
[tex]1.66 \times {10}^{ - 15} \: \: moles[/tex]
Hope this helps you
The atoms of some elements can be made
radioactive by
1)placing them in a magnetic field
2)bombarding them with high-energy
particles
3)separating them into their isotopes
4)heating them to a high temperature
Answer:
I think 4 I got it right on edg but i duno if its the same
Explanation:
The atoms of some elements can be made radioactive by: bombarding them with high energy particles: Choice 3.
Definition:
Radioactivity is a process, (spontaneous) by which the nucleus of an unstable atom loses energy by emitting radiation which may include alpha particles, beta particles, gamma rays and conversion electrons, otherwise known as high energy electrons.However, radioactivity is observed as a natural occurring process, the phenomenon can also be artificially induced typically via the bombarding atoms of a specific element by radiating particles, thus creating new atoms.Read more:
https://brainly.com/question/24612906
Check out this long-form version of the periodic table. It shows where the two rows of
elements from question 4 really belong in the periodic table. Think about the challenges of
using this version of the periodic table.
Which statement offers the most likely explanation of why the long-form version of the
periodic table is seldom used?
The elements in the separate group are so rare that they do not occur in nature.
The elements in the separate group have very little in common with one another.
The long-form version no longer keeps the elements in order of increasing atomic
number.
The long-form version is too wide to easily fit on a computer screen or sheet of
paper.
Answer:
The long form version is too wide to easily fit on a computer screen or sheet of paper
Explanation:
methanol on reaction with acetyl chloride gives
Answer:
Explanation:
Ethanoyl chloride reacts instantly with cold ethanol. There is a very exothermic reaction in which a steamy acidic gas is given off (hydrogen chloride). Ethyl ethanoate (an ester) is formed.