An element which contains a fully filled second energy level i.e. it's valence shell is Neon (Ne), the tenth element in the periodic table.
Neon (Ne) is a chemical element in the periodic table with an atomic mass (Z) of 10. It is an inert gas placed in the Group 18 (group of noble gases) of the periodic table. It is used in electric signs and fluorescent lamps. The gas is colourless, odourless, tasteless, and lighter than air in weight. Neon gas naturally occurs in minute quantities in Earth’s atmosphere and is trapped within the rocks of Earth’s crust. Though neon is about 31/2 times as plentiful/abundant as helium in the atmosphere, dry air contains only 0.0018 percent neon by volume. Although, this element is more abundant in the cosmos than on the Earth.
An electronic configuration, which is also called a electronic structure or a electron configuration is the arrangement of electrons in orbitals around the atomic nucleus of an atom. The electronic configuration of an atom in the quantum-mechanical model is stated or written by listing the occupied orbitals, in the order of filling, with the number of electrons in each orbital indicated by a superscript.
The electronic configuration of Neon is 1s²2s²2p⁶ or [He] 2p⁶. The second energy level has two types of orbitals namely 2s and 2p. There is a single 2s orbital and 3 2p orbitals in the second energy level and as a single orbital can hold a maximum of two electrons, the total maximum number of electrons in the second energy level can be 2+6 = 8. Thus, a fully filled second energy level will be configured as 2s²2p⁶, as seen in the case of Neon.
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21. Which one of the following is not a form of chemical bonding? A. covalent bonding B. ionic bonding C. hydrogen bonding D. metallic bonding
Why H2O is called a molecule?.
Answer:
Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen. Hence, a molecule is the smallest subunit of a compound while an atom is the smallest subunit of an element. Aggregates of single atoms make elements. Aggregates of molecules make compounds.
Explanation:
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explain why the composition of an element is fixed
A fixed composition exists when an element contains only one type of atom.
What is fixed composition?A chemical substance's composition is fixed. "All samples of a compound have the same composition; i.e., all samples have the same proportion, by mass, of the elements present in the compound," Proust concluded.Pure Substance Matter with a defined composition and properties. Every pure substance is either an element or a compound. Elements All atoms are the same type, and elements only have one type of atom. For example, oxygen (O2), gold (Au), silicon (Si), and diamond (C).A pure substance is one that has a consistent chemical composition throughout, such as water, air, or nitrogen. A pure substance does not have to be composed of only one element or compound.To learn more about fixed composition refer to :
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How is kinetic energy formula derived?.
The kinetic energy formula is derived from the principle of conservation of energy.
The principle states that energy cannot be created or destroyed, it can only be converted from one form to another.
When an object is in motion, it has the potential to do work on other objects due to its motion. This potential energy is called kinetic energy.
The formula for kinetic energy is derived by considering an object of mass m, moving at a velocity v. If a net force F is applied to the object over a distance d, the work done on the object is given by the equation:
work = force x distance x cos(theta) where theta is the angle between the force and the displacement.
If we consider the force to be equal to the mass of the object multiplied by its acceleration, F = ma, and if we consider the displacement to be equal to the velocity of the object multiplied by the time, d = vt, then we can substitute these values into the equation for work.
By simplifying the equation, we get the kinetic energy formula as:
KE = 1/2 * m * v^2
Where KE is the kinetic energy, m is the mass of the object and v is the velocity of the object.
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how would having too much sample in the melting point tube most likely affect a melting point measurement?
Having too much sample in the melting point tube most likely results in a lower melting point measurement.
The melting point as well as liquefaction point of a substance is the temperature at which it changes its state from solid to the liquid. At melting point the solid as well as liquid phase will exists in an equilibrium. The melting point of a will depends on pressure and it is usually specified at a standard pressure such as 100 kPa or 1 atmosphere.
The melting point will be lower than expected. This is because having more sample will causes the heat to spread out more slowly throughout the tube, which can raises the temperature at the point of the measurement as well as causes the sample to melt before to it reaches its actual melting point.
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How many water molecule (H2O) can be produced from 6 molecule of hydrogen ga (white) reacting with 6 molecule of oxygen ga (red)? Which reactant i the limiting reactant? 6 molecule of oxygen and 6 molecule of hydrogen A. 6 water molecule, hydrogen i limiting B. 3 water molecule, oxygen i limiting C. 3 water molecule, hydrogen i limiting D. 12 water molecule, oxygen i limiting
The limiting reagent is hydrogen gas, and 6 molecules of water are generated.
We receive:
Six molecules make up a hydrogen gas molecule. 6 molecules make up an oxygen gas molecule.
The following is the chemical formula for the reaction between hydrogen gas and oxygen gas:
2H2 + O2 → 2H2O
Using the reaction's stoichiometry:
One oxygen molecule reacts with two molecules of hydrogen gas.
As a result, 6 molecules of hydrogen gas and 1/2 × 6 = 3 molecules of oxygen gas will react.
Since the amount of oxygen gas provided exceeds what is necessary. It is therefore regarded as an excess reagent.
As a result, hydrogen gas is regarded as a limiting reagent since it restricts product formation.
Using the reaction's stoichiometry:
2 molecules of water are created from 2 molecules of hydrogen gas. Thus, 6 molecules of hydrogen gas will result in 2/2 × 6 molecules of water.
As a result, 6 molecules of water are created, with hydrogen gas acting as the limiting reagent.
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A macromolecule that exists with backbone where the functional groups are the amine and the carboxylic acid: ___
protein. An organic substance with a carboxyl functional group is known as a carboxylic acid. They are abundant in nature and are also synthesized by humans. Carboxylic acids deprotonate.
to generate a carboxylate anion with the general formula R-COO-, which can form a range of useful salts such as soaps. A carboxylic acid is an organic acid with a carboxyl group (C(=O)OH)[1] linked to an R-group in organic chemistry. A carboxylic acid has the generic formula RCOOH or RCO2H, where R refers to the alkyl, alkenyl, aryl, or other group. Carboxylic acids are found in abundance. Amino acids and fatty acids are two important examples. A carboxylate anion is formed when a carboxylic acid is deprotonated.protein. An organic substance with a carboxyl functional group is known as a carboxylic acid. They are abundant in nature and are also synthesized by humans. Carboxylic acids deprotonate.
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Which one of the following is the largest mass?
A) 7.6 x 10^4 mg
B) 7.6 × 10^7 ng
C) 7.6 x 10^-² kg
D) 7.6 × 10^8 μg
Answer: its d
Explanation:
sorry if you get it wrong
Does molar mass determine density?.
Answer:
Since gases all occupy the same volume on a per mole basis, the density of a particular gas is dependent on its molar mass. A gas with a small molar mass will have a lower density than a gas with a large molar mass
Body mass index, bmi, is calculated using the formula \mathrm{bmi}=\dfrac{703w}{h^2}, where w is weight in pounds and h is height in inches. Anita is 5 ft 5 in. Tall. How much does she need to weigh for her bmi to be 20? round to the nearest tenth.
Using body's BMI, Anita weighs 123.92 pounds.
What does a body's BMI mean?Body Mass Index, or BMI, is a rough indicator of an individual's weight status. The BMI is a reliable indicator of your risk for diseases that can develop as a result of having a higher body fat percentage. Your chance of developing certain conditions like heart disease, high blood pressure, type 2 diabetes, gallstones, respiratory issues, and some malignancies increases with your BMI.
Body mass index (BMI) is calculated using the formula [tex]\frac{w}{h^{2} } \times 703[/tex]
Anita is 5 ft 5 in.
Height of Anita in inches = 66 inches
In accordance with the query, we have -
Body mass index formula: [tex]\frac{w}{h^{2} } \times 703[/tex]
BMI = 20
BMI = [tex]\frac{w}{h^{2} } \times 703[/tex]
⇒ 20 = [tex]\frac{w}{66^{2} }[/tex]× 703
⇒ 123.92 pounds
Consequently, Anita weighs 123.92 pounds.
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Calculate the molecular formula for a compound with a composition of 26.7% C, 2.22% H, and 71.1% O and a molecular weight of 90 g/mol. Please show all work.
1 mol C= 12.0 g C
1 mol H=1.0 g H
1 mol O=16.0 g O
Answer:
I hope this is right :)
empirical formula ---› molecular formula
An ad claims that a supplement helps a person lose weight, helps curb appetite to snack less, raises levels of serotonin to make a person feel less hungry, blocks new fat from forming, and increases metabolism to have more energy and burn existing fat. The manufacturer of the supplement published the data from the study of the product.
The study of the supplement used 100 subjects between the ages of 20 and 65. Of the 100 participants, 50 were male and 50 were female. Once the participants were selected for the study, each had the visceral fat measured. After all 100 participants were measured, it was determined that each had a measurement of more than 90 centimeters.
The testing subjects were divided into two groups. One group of 50 received the supplement and one group of 50 received a placebo. The study lasted for 16 weeks, but after 12 weeks, both groups were given the placebo.
After 16 weeks, men in both groups had a slight decrease in body weight. At the end of the study, the group receiving the supplement had reduced visceral fat when compared to the placebo.
After reading this data summary, what do you think? Answer the following questions in a post. Each question is worth 2 points.
1.Based on the testing data of the supplement, were any of the product's claims, proven correct? If so, identify the claims.
2.What data led you to that conclusion?
3.Which of the product's claims, if any, were not proven to be correct?
4.What type of testing data would you need to see in support of those claims to believe they were true?
5.When you see a product advertised on social media, how can you determine whether it is making reliable claims?
Answer:
If FDA finds that the evidence supporting the proposed claim is credible and the claim can be qualified to prevent it from misleading consumers,
fda.gov
Explanation:
How do you solve kinetic energy problems?.
To solve kinetic energy problems follow the following steps. There are 5 simple steps.
Potential and kinetic energy are the two fundamental types of energy. The energy that an object holds in relation to another object's position is known as potential energy. You have more potential energy, for instance, if you are at the top of a hill than if you are at the bottom.The energy an object has when in motion is referred to as kinetic energy. Kinetic energy can result from rotation, translation, or vibration (movement from one place to another). The mass and velocity of an object can be used in an equation to quickly calculate its kinetic energy.
To calculate kinetic energy the steps are :-
1. Understand the problem/ kinetic energy
2. Calculate the mass of the object
3. calculate the velocity of the object
4. substitute in the kinetic energy formula
K.E = 0.5 x mv2
5. Simply the equation and find the value.
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How energy saving is done in cloud computing?.
Cloud computing is an efficient way to save energy, by utilizing virtualized resources and reducing or eliminating the need for physical hardware.
By utilizing virtualized resources, companies can reduce the amount of energy needed to power physical hardware such as servers. This also reduces the need for cooling systems, as the machines are running in a virtual environment.
Additionally, cloud computing allows for more efficient resource allocation, meaning that more users can be supported with fewer resources, which in turn reduces the energy used.
Finally, cloud computing also enables automated operations, which can reduce the human energy used to manage complex IT tasks.
By implementing these energy-saving measures, cloud computing can help businesses save on energy costs and help reduce their environmental impact.
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the smallest subatomic particle that makes up an atom, and carries a negative charge____
The smallest subatomic particles, electrons are negatively charged and comprise an atom. Electrons are located in the area termed the electron cloud that surrounds the nucleus of an atom.
The set of primary particles that comprise an atom includes many other particles than the electron. Like other elementary particles, electrons can collide with other particles and, when they are diffracted, exhibit wavelike characteristics. The smallest subatomic particles, electrons are negatively charged and comprise an atom. A particle that makes up an atom is referred to as a subatomic particle in the physical sciences. According to the Standard Model of particle physics, a subatomic particle might either be a composite particle made up of other particles or it might not.
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The kinetic-molecular theory of gases assumes that ideal gas molecules (1) are constantly moving; (2) have negligible volume; (3) have negligible intermolecular forces; (4) undergo perfectly elastic collisions; and (5) have an average kinetic energy proportional to the ideal gas's absolute temperature.T/F
Yes, all of the information provided about the kinetic-molecular theory of gases is correct and True.
The kinetic theory of gases is a theory based model that describes the molecular composition of gas in terms of a wide number of submicroscopic particles like atoms and molecules.
The theory goes on to explain that gas pressure is caused by particles colliding with each other and the container's walls. Temperature, volume, and pressure are all defined by kinetic theory of gases, as are transport properties like viscosity and thermal conductivity, as well as mass diffusivity. The kinetic-molecular theory explains all of the properties which are associated with this microscopic phenomenon. The theory is important because it aids in the development of correlations between macroscopic properties and macroscopic phenomena.
In addition the theory also explains other related phenomenon like the Brownian motion.
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assuming equal concentrations and complete dissociation, arrange these aqueous solutions by their freezing points.NaNO3 K2SO4 Li3PO4
The aqueous solutions by their freezing points are Li3PO4, K2SO4 ,
NaNO3.
What is concentration ?
The volume of solute that has been dissolved in a specific volume of solvent or solution is known as the concentration of a solution. A solution with a significant concentration of dissolved solute is one that is concentrated. When there is just a minimal amount of dissolved solute in a solution, it is said to be diluted.
What is aqueous solution ?
Solute (dissolved) ions and molecules are encircled by water molecules and absorbed into the web of bonds in the water, in other words.
Therefore, aqueous solutions by their freezing points are Li3PO4, K2SO4 ,
NaNO3.
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The wavelength of visible light varies from 0.40 μm to 0.70 μm as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.61 μm.
The energy of a photon whose wavelength is 0.61 μm is 3.25 * 10⁻¹⁹J.
What is the energy of a photon?The energy that a single photon carries is known as photon energy.
Energy is inversely correlated with wavelength because it is directly proportional to the electromagnetic frequency of the photon. The energy of a photon increases with its frequency.
The formula for calculating the energy of a photon, E, is given below:
E = hc/λ
where:
h is Planck's constant = 6.626 * 10⁻³⁴ Js
c is the speed of light = 3.0 * 10⁸m/s
λ is the wavelength of the photon = 0.61 μm or 6.10 * 10⁻⁷ m
E = 6.626 * 10⁻³⁴ * 3.0 * 10⁸ / 6.10 * 10⁻⁷ m
E = 3.25 * 10⁻¹⁹J
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c) Calculate the frequency of light required to remove the valence electron(s).
The frequency of light required to remove the valence electron(s) from an atom is known as the ionization energy. The ionization energy is dependent on the atomic structure and is specific to each element.
What is calculation of frequency of light?This energy can be calculated using the equation: E = hf = hc/λ, where E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.E = hf = hc/λwhere E is the ionization energy, h is Planck's constant, f is the frequency of the light, c is the speed of light, and λ is the wavelength of the light.To calculate the frequency of light required to remove the valence electron(s) from an atom, the ionization energy of the atom must be known, and then the equation can be rearranged to solve for frequency:f = E/h = hc/λEIt is important to note that the ionization energy for each element is unique and can be found in periodic table or in the reference book.To learn more about frequency of electron refer:
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water molecules are composed of an oxygen atom and 2 hydrogen atoms. which atom is the more electronegative atom?
Answer: Oxygen is more electronegative than the two hydrogen atoms. I hope this helps!
Explanation:
This is due to their electrons in their covalent bonds, they are closer to the oxygen atom then the two hydrogen atoms.
how can a small contained fire be extinguished most easily?
If the fire is contained in a beaker or a small vessel, it can often be extinguished by covering the vessel with a wire gauze or addition of sand or dry ice. If the fire is in a larger vessel or has spread, dry ice is very effective.
What is meant by vessel?
A ship or a sizable boat is a vessel. a tube that the body's blood travels through to circulate. A network of arteries, arterioles, capillaries, venules, and veins make up the blood vessels.Your body's blood travels through blood arteries, which act as conduits. They create a circuit-like closed loop that starts and finishes at your heart.Your circulatory system is made up of blood vessels and heart vessels. About 60,000 miles of blood arteries make up your body.The main type of water-conducting cell in flowering plants is called a vessel cell. Vessel cells are modified tracheids in which the end walls have lost their primary membranes, allowing for direct, unhindered connections for water transport between the cells.To learn more about vessel refer to
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Consider the titration of a 35.0-mi sample of 0.175 M HBr with
0.200 M KOH. Determine each quantity.
a. the initial pH
b. the volume of added base required to reach the equivalence point
c. the pH at 10.0 mL of added base
d. the pH at the equivalence point
e. the pH after adding 5.0 mL of base beyond the equivalence point
The initial pH of the solution is 1.76.
A 35.0-mi sample of 0.175 M HBr was titrated with 0.200 M KOH. Figure out each quantity.The volume of added base required to reach the equivalence point is 17.5 mL.The pH at 10.0 mL of added base is 7.94.The pH at the equivalence point is 12.75.The pH after adding 5.0 mL of base beyond the equivalence point is 13.63.The initial pH of the solution is acidic. Since HBr is a strong acid, it will completely dissociate in solution and the pH of the solution can be calculated using the concentration of hydrogen ions: pH = -log[H+] = -log(0.175 M) = 1.75.The volume of base needed to reach the equivalence point can be calculated using the stoichiometry of the reaction. The moles of HBr reacted are equal to the moles of KOH added, so the volume of KOH needed to neutralize the HBr is equal to the moles of HBr divided by the molarity of the KOH, or V = (0.175 mol/0.200 M) = 0.875 L.The pH at 10.0 mL of added base can be calculated using the Henderson-Hasselbalch equation. Assuming that the volume of the solution is not changed by the addition of the base, the pH can be calculated as pH = pKa + log([base]/[acid]) = -log(0.175 M) + log(0.2 M/0.175 M) = 1.87.To learn more about The initial pH of the solution refer to:
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Calculate number of moles in
3.01 X 10^23 atom of moles
of rubidium
Answer:
There are 0.5 moles of rubidium
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23}6.023×10
23
of particles.
To calculate the moles, we use the equation:
\text{Number of moles}=\frac{\text{Given atoms}}{\text {avogadro's number}}=\frac{3.01\times 10^{23}}{6.023\times 10^{23}}=0.5molesNumber of moles=
avogadro’s number
Given atoms=
6.023×10
23
3.01×10
23
=0.5moles
Thus there are 0.5 moles of rubidium
For a gas-phase reaction where the temperature and the
pressure remain constant, any mole ratio is equal to a volume
ratio.
a)TRUE
b)FALSE
It is true that For a gas-phase reaction where the temperature and the pressure remain constant, any mole ratio is equal to a volume ratio.
What is gas-phase reaction?The simplest chemical processes are ones that take place in the gas phase and are completed in a single step, as the transfer of a chlorine atom from ClNO2 to NO to produce NO2 and ClNO. NO + ClNO2(g) (g). In the gas phase, an atom or molecule can undergo the process of becoming an ion by adding or removing charged particles like electrons or other ions. Gas phase ion chemistry heavily relies on these reactions.Only in the case of ideal gases and no change in the number of gas-phase moles during the reaction is the equilibrium composition pressure independent. Increasing the pressure at constant temperature reduces the equilibrium conversion when the reaction involves more gas-phase moles.
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draw the major organic product formed in the reaction.conc. H+ OH
In the reaction, the major product formed is Oxygen with a positive charge on it, it is very unstable because it is an electronegative atom.
In the first stage of the reaction, protonation with the lone pair of electrons on the oxygen atom takes place and an unstable structure of oxygen is obtained which carries a positive charge. The instability is due to the opposite nature of the oxygen atom.
In the next step, hydrogen is removed from the adjacent carbon along with the removal of water giving us the final product.
In chemistry, protonation aka hydronation is the addition of a proton (H+) to an atom, molecule, or ion, forming a conjugate acid. Protonation often occurs in the reaction of an acid with a base to form a salt.
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Answer the following question by entering the numeric value with appropriate units. when entering units, capitalization is important. for example, m is the symbol for meter and m is the symbol for molarity. if the length of one side of a square is 12.0 m , what is the perimeter of the square?Express the perimeter with the appropriate units.
The perimeter of the square is 48 meter if the length of the side is 12 meter.
A square can be defined as a two-dimensional closed shape with 4 equal sides and 4 vertices. The opposite sides of the square are parallel to each other. Square is also a rectangle with equal length and breadth. The perimeter of the square is a two-dimensional shape. The perimeter the length of one side must be multiplied by 4 as squares have 4 sides. so, 12 is multiplied by 4 and the result will be 48 meters. so, the parameter of the square will be 48 meters. A square is a quadrilateral with four equal sides. There are so many objects that are in the shape of a square. The square shape is identified by its equal sides and the interior angles are equal to 90°.
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if zinc replaces iron, iron replaces lead, and zinc replaces lead in a chemical reaction, the order of activity from most active to least active is
In a chemical reaction, if zinc replaces iron, iron replaces lead, and zinc replaces lead, the order of activity from most active to least active is zinc, iron, and then lead.
This is because zinc is more active than iron, and iron is more active than lead. This is due to the electronegativity of the elements, where zinc is the most electronegative, followed by iron and then lead.
The higher the electronegativity, the more active the element is in a chemical reaction.
This is because zinc has the highest reactivity compared to iron and lead, meaning that it has the greatest ability to take the place of iron and lead in the reaction.
Iron has the second highest reactivity and is able to take the place of lead, and lead has the lowest reactivity and is the last to react. This is why zinc is the most active, iron is second most active, and lead is least active.
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Oxides of active metals, such as CaO, react with water to produce...A) Metal CarbonatesB) Metal HydridesC) Metal HydroxidesD) Acids
The correct answer is Metal Hydroxides
What are metal hydroxides?
Metal hydroxides are metal hydroxides.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.They are often strong foundations. They consist of hydroxide anions and metal cations. Some metal hydroxides, such as alkali metal hydroxides, completely ionize when dissolved. Some metal hydroxides are weak electrolytes and only partially dissolve in aqueous solution.To know more about metal hydroxides, click the link given below:
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what is the common name for sodium hydrogen carbonate ?
Answer: The common name for sodium hydrogen carbonate is baking soda.
I hope this helps!
Explanation: It is a chemical compound with a formula called NaHCO3. It consists of sodium cation or Na+ and a bicarbonate anion HCO3-
to make 150 ml of a 0.50 m solution of sucrose, you will need how many grams of sucrose?
To make the 150 ml of the 0.50 M solution of sucrose, we need grams of sucrose is 25.6 g.
Given that :
The volume of the sucrose = 150 mL
The molarity of the solution = 0.50 M
The molarity expression is given as :
The molarity = moles / volume in L
Moles = molarity × volume
= 0.50 × 0.150
= 0.075 mol
The molar mass of sucrose = 342.2 g/mol
The mass of sucrose = moles × molar mass
The mass of sucrose = 0.075 × 342.2
= 25.6 g
Thus, the mass of sucrose is 25.6 g.
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