The model of a neutral element is shown below. Which particle determines the reactivity of the element?


A
B
C
D
​

Answer:

shale

sandstone

limestone

Explanation:

These fossiliferous rocks are extensively developed in Nepal, particularly in Thak Khola (Mustang), Manang, and Dolpa. This zone is around 40 kilometers broad and is made mostly of fossiliferous sedimentary rocks.

Answer:

When water becomes a solid, it releases heat, warming up its surroundings. This makes freezing an exothermic reaction

Explanation: i think

Answer:

CH2 = CH2 + 1/2 O2  -Ag--> CH2-O-CH2

Explanation:

Producing Epoxyethane by reacting ethene in presence of a silver catalyst with a limited amount of oxygen. The temperature range of the reaction is 250 - 300°C.

The balanced reaction is as follows -

CH2 = CH2 + 1/2 O2 (Reactants) -silver catalyst--> CH2-O-CH2 (Product)

There are numerous ways that fossils can form, but the majority occur when a living thing—such as a plant or animal—dies and is swiftly buried by sediment—such as mud, sand, or volcanic ash and rock.

Thus, Only the hard bones or shells are left behind when soft tissues degrade, yet in some cases an organism's soft tissues can be retained and animals.

More sediment, volcanic ash, or lava may accumulate over the organism after it has been buried, and eventually all the layers harden into rock.

These once-living organisms are only revealed to us from within the stones when the process of erosion takes place, when the rocks are worn back down and washed away and fossil.

Thus, There are numerous ways that fossils can form, but the majority occur when a living thing—such as a plant or animal—dies and is swiftly buried by sediment—such as mud, sand, or volcanic ash and rock.

Learn more about Fossils, refer to the link:

https://brainly.com/question/31419516

#SPJ1

Streptomycin is the drug that does NOT act by competitive inhibition.

. Among the given drugs, the one that does NOT act by competitive inhibition is: C) streptomycin.

Your answer: Streptomycin does not act by competitive inhibition.

Streptomycin is an aminoglycoside antibiotic that works by binding to the 30S ribosomal subunit of bacteria, disrupting protein synthesis, and causing cell death. It does not competitively inhibit any specific enzyme or process, unlike the other drugs listed.

Competitive inhibition occurs when a substance competes with the substrate for the active site of an enzyme, effectively reducing the enzyme's activity. In competitive inhibition, the inhibitor molecule is structurally similar to the substrate and binds reversibly to the active site.

Hence option C i.e. Streptomycin is the drug that does NOT act by competitive inhibition.

Learn more about competitive inhibition at https://brainly.com/question/30325095

#SPJ11

Answer: What grade is this for because anything 10 and above my brother can solve

Explanation:

Answer:

0.8833 mole of C3H8

Explanation:

Given:

Mass of C₃H₈ (Propane) = 38.95 gram

Computation:

Molar mass of C = 12.01

Molar mass of H = 1.008

Molar mass of C₃H₈ (Propane) = 3(12.01) + 8(1.008)

Molar mass of C₃H₈ (Propane) = 36.03 + 8.064

Molar mass of C₃H₈ (Propane) = 44.094

Number of mol in 38.95 gram Propane = Mass / Molar mass

Number of mol in 38.95 gram Propane = 38.95 / 44.094

Number of mol in 38.95 gram Propane = 0.88334

Answer:

Use the Periodic Table to find molar masses.

Propane (C3H8), a common fuel, reacts with oxygen to form carbon dioxide and water according to the equation below:

C3H8 + 5O2 → 3CO2 + 4H2O

If a propane heater burns 38.95 g C3H8, it consumes

38.95 mol C3H8.

0.8830 mol C3H8.

1 mol C3H8.

44.10 mol C3H8.

Part 2

How many moles of oxygen are required to produce 37.15 g CO2?

37.15 g CO2 = 1.407 mol O2

Part 3

What mass of propane is necessary to react with the amount of oxygen calculated in the previous question?

12.41   g C3H8    

Answer:

double bond to an atom

a lone pair

a single bond to an atom

Explanation:

Answer:

m = 13.6 kg

Explanation:

Given that,

Volume, V = 1 L

The density of the liquid is, d = 13.6 g/cm³

We know that, 1 L = 1000 cm³

The formula of density is given by :

Density=mass/volume

\(m=d\times V\\\\m=13.6\ g/cm^3\times 1000\ cm^3\\\\m=13600\ g\\\\\text{or}\\m=13.6\ kg\)

So, the mass of liquid is 13.6 kg.

Answer:

The 3rd option is correct

Explanation:

The element in group 13 and period 3 is aluminium which has the electron configuration

\(1{s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{1} \)

or [Ne] 3s^2 3p^1

Answer:

Chemical change

a change that occurs when one substance combines with another substance to make a new substance

Explanation:

Chemical property

a characteristic of a substance that describes its composition, reactivity, and how the substance changes into a different substance

Answer:

Magnesium also reacts with nitrogen in the air to produce some magnesium nitride (Mg3N2). Safety: Do not look directly at the burning magnesium due to the intensity of the light. A dry-powder fire extinguisher should be available. Disposal: Once cooled the solid magnesium products can be thrown in the trash.

Explanation:

Answer:

C₂H₄ + 3O₂  →    2CO₂  + 2H₂O

Explanation:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

3H₂O   →  3H₂ + 3O₂

This equation do not follow  the law of conservation of mass because there are more oxygen atoms on right side so mass is not conserved.

C₂H₄ + 3O₂  →    2CO₂  + 2H₂O

This equation follow the law of conservation of mass because there are equal number of atoms of all elements on both side of equation.

C  + 4H₂   →   CH₄

This equation do not follow the law of conservation of mass because there are more hydrogen atoms on left side of equation so mass is not conserved.

2Na  + Cl    →  NaCl

This equation also do not follow the law of conservation of mass because there are more sodium atoms on left side of equation so mass is not conserved.

There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the beta decay of platinum-199 is ₇₉Au¹⁹⁹.

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.

The balanced equation for the beta decay of ₇₈Pt¹⁹⁹.

₇₈Pt¹⁹⁹ \(\rightarrow\) -₋₁e⁰ + ₇₉Au¹⁹⁹

Beta decay is the emission of electron particle from the given isotope. the product is gold- 199.

Therefore, the beta decay of platinum-199 is  ₇₉Au¹⁹⁹.

To know more about nuclear decay, here:

https://brainly.com/question/21114779

#SPJ1

Answer:

Glucose has a chemical formula of:C6H12O6 That means glucose is made of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms. You will be building one type of sugar called glucose.

Answer:

There are 3 elements found in glucose

Explanation:

Carbon

Hydrogen

Oxygen

The energy of the metal d orbitals distributing a charge of −6 due to an increase in electrostatic repulsion.

What is crystal field theory?

The ability of transition metals to form complexes is a key property. A complex is made up of a core metal atom or ion surrounded by a number of ligands. Crystal field theory governs the interaction of these ligands with the core metal atom or ion.

Crystal field theory was developed in 1929 and treats the interaction between metal ion and ligand as a purely electrostatic phenomena, with the ligands seen as point charges in the region of the central atom's atomic orbitals. Crystal field theory was developed and extended to account for the partly covalent character of bonding between ligands and metal atoms, primarily through the application of molecular orbital theory.

To accurately grasp the crystal field interactions in transition metal complexes, knowledge of the geometrical or spatial distribution of d orbitals is required. In a free gaseous metal ion, the d-orbitals are fivefold degenerate. If a spherically symmetric field of negative ligand filled charge is imposed on a central metal ion, the d-orbitals remain degenerate but the energy of the free ion changes.

Learn more about crystal field theory from given link

https://brainly.com/question/29389010

#SPJ4

Answer:

14.5 moles of CH4

Explanation:

There is 14.5 moles of carbon in the product CO2....there has to be 14.5 moles of carbon in the reactant CH4

   14.5 moles

Nuclear processes alter the sorts of atoms present, but chemical reactions do not. The electrons in the atom play a significant role in chemical reactions when nucleus reactions occur in atom nuclei.

The energy found in an atom's nucleus, or core, is known as nuclear energy. Energy maintains the nucleus of atoms together, the minuscule units that make up all matter in the universe. The dense nucleus of an atom has an enormous quantity of energy.

The most lethal weapons on earth are nuclear weapons. One can wipe out an entire metropolis, perhaps killing millions of people, endangering the ecosystem and the lives of future generations due to its long-term devastating impacts.

To know more about Nuclear visit:

https://brainly.com/question/18187269

#SPJ1

The volume of pure gold has a mass of 65.4g and a density of 9.3g/cm3 is   3.3886 cm3.

Solution :

∵ density = mass ÷ volume

⇒ volume = mass ÷ density

∴ volume of pure gold = (mass of gold) ÷ (density of gold)

                                      = 65.4 ÷ 19.3

  The volume of pure gold = 3.3886 cm3

Learn  more about Density at :

brainly.com/question/14667456

Answer: because acid and water react in a vigorous exothermic reaction, releasing heat, sometimes boiling the liquid.

Irony: a situation in which there is a contrast between expectation and reality.Irony can take many different forms.

The verbal irony, dramatic irony, and situational irony are the three types .Irony occurs in literature AND in life whenever a person says something or does something that departs from what they (or we) expect them to say or do.

Irony in the story 'Dusk':

Ironically, the main character, who thinks he is a good character judge, is duped by the young man who sat next to him on the park seat.

According to Gortsby, darkness is a time when dejected and shady people emerge.

The term irony has its roots in the Greek comic character Eiron, a clever underdog who by his wit repeatedly triumphs over the boastful character Alazon. The Socratic irony of the Platonic dialogues derives from this comic origin.

FIND MORE:-https://brainly.in/question/28085927

#SPJ4

Answer:

An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes.

Explanation:

Hope this helps...

The (C5H5)2Fe(CO)2 molecule contains two cyclopentadienyl rings (C5H5) and two carbonyl groups (CO) bound to an iron atom (Fe).

At room temperature, the molecule undergoes rapid rotation, causing the two cyclopentadienyl rings to be equivalent and giving rise to two peaks of equal area in the 1H NMR spectrum. However, at low temperatures, the rotation becomes restricted, leading to the formation of two diastereomers with different arrangements of the cyclopentadienyl rings and carbonyl groups. These diastereomers give rise to four resonances in the 1H NMR spectrum, with relative intensities of 5:2:2:1, reflecting the different orientations of the protons in the two diastereomers.

Therefore, the low-temperature 1H NMR spectrum of (C5H5)2Fe(CO)2 provides more information about the molecular structure than the room temperature spectrum, which shows only the equivalent protons.

Read more about cyclopentadienyl here:https://brainly.com/question/31500734

#SPJ11

Answer:

they're a non renewable source

Explanation:

Coal and petroleum, are formed by the deposit of organisms that have died a million years ago. under pressure and high temperature underground the dead organisms that used to live millions of years ago are formed into petroleum. however, coal is formed by the deposit of dead plants in the same process as petroleum. for the formation of petroleum and coal it takes a long term of time for it to be formed (millions of years). and that's why its limited

Answer:

Hi!!

Coal and petroleum deposits in the earth are limited.

They are non renewable resources. They are formed after a long period. They are formed by the remains of dead plants and animals present deep inside the earth crust. It took millions of years to get converted into coal and petroleum.

Hope it helps!!!!

Answer:

Na2CO3 → Na2O + CO2  

Explanation:

CO2 is your answer

Answer:

CO2

Explanation:

I Just Took The Quiz

Have A Good Day :)

Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.

Explanation:(1) Plasma has a very high electrical conductivity .

(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field

(3)It is readily influenced by electric and magnetic fields .

(4)It produces it's on electromagnetic radiations.



Work spaces should be maintained spotless and organized. Small volumes of liquid are measured and dispensed using pipets. Use your mouth to syphon the liquid into the pipet. Thus, it is true.

If any equipment is malfunctioning and halt, turn it off. If an acid is splashed on your skin, thoroughly rinse it off. Always completely wash your hands with soap and water after handling chemicals, biological specimens, and other lab materials.

Small volumes of liquid are measured and dispensed using pipets. Use your mouth to syphon the liquid into the pipet. Cleanliness and organization should be maintained in the workplace. Pipets are used to measure and dispense small quantities of liquid.

Therefore, Every substance in the lab should be regarded as hazardous. All chemicals should be put back in their original containers.

Learn more about chemicals here:

https://brainly.com/question/28300640

#SPJ4

Answer:  -2m/s2

Explanation:

Using the following equation ; acceleration = Change in velocity / time

i.e  a =  v - u / t

where  'a'  = acceleration

              v  = final velocity

              u  =  initial velocity

              t   =  time

Therefore;  from the graph we have acceleration to be, 0 - 6m/s / 3s  = -2m/s2

Yes, Mg(OH)₂ will precipitates if ion product > Ksp.

Yes, BaSO₄ will precipitates if ion product > Ksp.

To determine whether a precipitate will form when Mg(NO₃)₂ is added to NaOH, we need to compare the ion product (Qsp) of Mg(OH)₂ to its solubility product (Ksp). If Qsp is greater than Ksp, then a precipitate will form.

Calculating Qsp for Mg(OH)₂:

Mg(NO₃)₂ → Mg₂+ + 2NO₃-

NaOH → Na+ + OH-

Mg₂+ + 2OH- → Mg(OH)₂

[Mg₂+] = 4.0x10⁻⁴ M

[OH-] = 2.0x10⁻⁴ M

Qsp = [Mg₂+][OH-]² = 4.0x10⁻⁴ x (2.0x10⁻⁴)² = 1.6x10⁻¹¹

Since Qsp is less than Ksp, which is 1.5 x 10⁻¹¹, a precipitate will not form.

To determine whether a precipitate will form when BaCl₂ is mixed with K₂SO₄, we need to compare the ion product (Qsp) of BaSO₄ to its solubility product (Ksp). If Qsp is greater than Ksp, then a precipitate will form.

Calculating Qsp for BaSO₄:

BaCl₂ → Ba₂+ + 2Cl-

K₂SO₄ → 2K+ + SO42-

Ba₂+ + SO42- → BaSO₄

[Ba₂+] = 0.004 M

[SO42-] = 0.008 M

Qsp = [Ba₂+][SO42-] = 0.004 x 0.008 = 3.2x10⁻⁵

Since Qsp is greater than Ksp, which is 1.1x10⁻¹⁰, a precipitate will form.

Learn more about precipitate

brainly.com/question/28451077

#SPJ11