Ways in which minerals are used for items typically found in a medicine cabinet are: Emery boards have either garnet or corundum, Fluoride in toothpaste is derived from fluorite, and “Scouring agents” in toothpaste contain calcite.
Things in your domestic that are made with metallic mineral assets are simple to recognize. They are commonly glossy and see like metal unless they are painted, are difficult unless they are exceptionally lean, and are by and large overwhelming for their size. There are numerous other things in your domestic that are made of non-metallic mineral assets, too called mechanical minerals. The concrete establishment of your domestic is made with sand, rock, and lime from limestone. Chimney bricks are made of clay minerals. Window glass is made of quartz sand, whereas interior dividers are made of sheets of drywall made generally of the mineral gypsum. Gypsum is additionally ground up and utilized as a filler in paint on the dividers, and other minerals are ground up to supply shades that color the paint. All mineral assets are non-renewable, so it’s exceptionally critical that they are preserved. The washroom is made utilizing so numerous mineral assets that it is essentially a mine in disguise.
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Louis has two sets of two gears (Set A and Set B) that he is using to build two different machines. He has all the gears laying out separately, as shown in the diagram above. Then he puts the gears into the machines so that the gears in Set A are touching each other and the gears in Set B are touching each other. Use the information in the diagram to answer the question.
After the gears have been touching for a while, which of the two bottom gears will be cooler, and why?
After the gears have been touching for a while the bottom gear that will be cooler is the set A bottom gear because according to the image, it was supplied with a lower energy.
What is a machine?A machine is defined as the device that is used to make work easier especially movement of objects from one place to another and to save energy.
According to the question, Louis has set A and set A gears he intends to use to build his machine.
The quantity of heat he supplied for the bothe sets in the machine is different as seen in the attached image.
Set A = Low energy of 40°CSet B = High energy of 80°CTherefore, the gear that would be cooler after the gears have been touching for a while is the set A bottom gears.
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Which of the following experimental plans will test the effects of pressure on a reaction with gases and what is the expected result?
A) Keep pressure constant and increase the temperature of the reaction; reaction rate will decrease.
B) Keep temperature constant and increase the pressure of the reaction; reaction rate will increase.
C) Keep pressure constant and decrease the temperature of the reaction; reaction rate will decrease.
D) Keep temperature constant and decrease the pressure of the reaction; reaction rate will increase.
Experimental plans will test the effects of pressure on a reaction with gases and then keep pressure constant and decrease the temperature of the reaction; reaction rate will decrease
When increasing the pressure on reaction involving reacting gases increasing the rate of reaction and when keep pressure constant and also decreases the temperature of the reaction reaction rate is also decreases because pressure is constant and temperature is decreases so because of temperature reaction rate decreases
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The element x has three naturally occurring isotopes. the masses (amu) and bundances of the isotopes are given in the table below. the average atomic mass of the element is ________ amu.
Isotope Abundance(%) Mass(amu)
15X 28.6 15.33
17X 13.3 17.26
16X 58.1 18.11
A. 17.20
B. 16.90
C.17.65
D. 17.11
The average atomic mass of the element is 17.20 amu. This is calculated using the relative abundances and atomic masses of its isotopes.
In order to calculate the average atomic mass of the element, we need to multiply the relative atomic mass of each isotope by its abundance, and then add them up.
So, for isotope ¹⁵X:
15.33 amu * 0.286 = 4.38 amu
For ¹⁷X:
17.26 amu * 0.133 = 2.30 amu
And for ¹⁸X:
18.11 amu * 0.581 = 10.52 amu
Now, finally, we add these up to get the average atomic mass of element X:
4.38 amu + 2.30 amu + 10.52 amu = 17.20 amu
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An object is added to a graduated cylinder containing 12.5 mL of water. If the volume of the object is 7.6 mL, what is the new volume of the water?
12.5 mL
17.5 mL
4.9 mL
20.1 mL
If an object is added to a graduated cylinder containing 12.5 mL of water. If the volume of the object is 7.6 mL, then the new volume of the water in the graduated cylinder would be 20.1 mL, therefore the correct answer is option D.
What is density?It can be defined as the mass of any object or body per unit volume of the particular object or body.
As given in the problem an object is added to a graduated cylinder containing 12.5 mL of water. If the volume of the object is 7.6 mL,
The new volume in the graduated cylinder = 12.5 + 7.6
= 20.1 mL
If something is put in a graduated cylinder with 12.5 mL of water in it. The new volume of water in the graduated cylinder if the object's capacity is 7.6 mL would be 20.1 mL, hence option D is the proper response.
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1.68 g h2 is allowed to react with 9.89 g n2 , producing 1.69 g nh3 . part a what is the theoretical yield in grams for this reaction under the given conditions? express your answer to three significant figures and include the appropriate units.
The percent yield of NH3 is 18.06%.
What are balanced equations?The equal number of each kind of atom is present on both sides of a chemical equation in order for it to be balanced. Subscripts are a component of the chemical formulae that indicate how many atoms of the previous element are present in each of the reactants and products.
Balanced equation
3H₂(g) + N₂(g) → 2NH₃
We first need to determine the mass NH₃ produced by each reactant in the masses given. The one that produces the least amount of NH₃ is the limiting reagent. The theoretical yield is the amount of of NH₃ produced by the limiting reagent.
Process:
mass reactant→ mol reactant → mol NH₃ → mass NH₃
Reactant H₂
⇒mass H₂ → mol H₂
1.68gH₂×1mol H/2.106gH=0.797 mol H₂
mol H₂ → mol NH₃
0.797 mol H₂2×mol NH₃/3mol H₂=0.531 mol NH₃
mol NH₂ → mass NH3
0.531 mol NH₃×17.031gm of NH₃/1mol nh3=9.043 g NH₃
⇒mol N₂ → mass N2
9.89gm n29×1 mol N₂/28.04g of N₂=0.352 mol N₂
0.3520 mol N₂×2 mol NH₃ mass /1mol N₂=0.704 mol NH₃
⇒mol NH₂ → mass NH₃
0.704 mol NH₃ ×17.031g NH₃ /1 mol NH₃ = 12gm NH₃
H₂ is the limiting reagent so the theoretical yield of NH₃, is 9.043g.
Actual yield is 1.69
Percentage yield= actual yield/ theoretical yield×100%
=1.699/9.043×100%
=18.6%
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what is the definition of a physical change
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.
The dimensions or shape of matter may be changed, but no reaction occurs. Physical changes are usually reversible. Note that whether a process is reversible or not isn't truly a criterion for being a physical change.
Contrast this with a chemical process, during which chemical bonds are broken or formed so that the starting and ending materials are chemically different. Most chemical changes are irreversible. On the opposite hand, melting water into ice (and other phase changes) is often reversed.
Examples of physical changes include: Crumpling a sheet of paper (an exemplar of a reversible physical change)Breaking a pane of glass (the chemical composition of the glass remains the same)
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What is the meaning of chemical formula?
Answer:
is a way used to show the number and types of an atom in a molecules or cpd.
Chemical formula is the use of symbols of respective elements with the number of atoms present in it.
It is an easy way to recognize the elements from their symbols for easy use in the equations. In short it is the shortform of the chemical name for any compound or molecule. The number of atoms is represented numerically in subscript of the symbol of the
For example, the chemical formula for water is H2O. H is for the hydrogen atom and O is for the oxygen atom, in water there is one oxygen and two hydrogen atoms, therefore the chemical formulae will become H2O.
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acetonitrile (ch3cn)(ch3cn) is a polar organic solvent that dissolves a wide range of solutes, including many salts. the density of a 1.70 mm librlibr solution in acetonitrile is 0.824 g/cm3g/cm3 . part a calculate the concentration of the solution in molality.
This formula is used to determine a solution's molality:
Molality is defined as the product of the mass of the solvent and the number of moles of the solute.
Solute concentration is 1.80 M.
Thus, 1.80 moles of solute are contained in one litre.
Mass of solvent equals mass of solution minus mass of solute.
Solution mass equals volume times density.
1 L is equal to 1000 cm3 of solution.
mass of solution is 1000 minus 0.824.
824 g is the solution's mass.
Number of moles times molar mass equals the solute's mass.
86.84 g/mol is the solute's molar mass.
Solute mass = 1.80 86.84
156.3 g is the solute's mass.
Solvent mass equals 824 minus 156.3.
Solvent mass is 667.7 g, or 0.6677 kg.
Solution's molality is equal to 1.80/0.6677.
The solution's molality is 2.70 mol/kg.
A solution's molality is the number of moles of solute per kilogram or per kilogram of solvent in the solution. As opposed to the definition of molarity, which is based on a certain volume of solution, this is the opposite. Molality is measured in chemistry using the mol/kg unit.
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5. Predict You are floating motionless on a
rubber raft in the middle of a pool. A friend
forms a wave by slapping the water every
second. Will the wave carry you to the edge
of the pool? Explain your answer.
When the pool's center is occupied by the rubber raft. Think of it as the raft's starting position.
Once it reaches the rubber raft, the raft will start to rise when the friend creates a wave by slapping the water.
The raft will really gain energy from the wave, moving upward.
The raft will return to its original place once the wave passes.
The raft will return to its original place where it was before the wave hits it because it is indicated in the question that it is immobile.
As a result, the wave won't take it to the pool's edge.
Because you are only lightly lifted by the waves or because Lee cannot be pushed to the other side of the pool, the wave won't drive the person on the raft over the edge of the pool.
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A bowling ball with a radius of 8.0 cm weighs 2722g. what is the density of the bowling ball?
The density of the bowling ball is 3.384 g/cm^3. The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used.
What is Volume?A closed surface or object's volume is measured in three dimensions and is expressed mathematically. Cubic measurements of volume include m3, cm3, in3, etc. The term "volume" is sometimes used to refer to "capacity." A three-dimensional space's occupied volume is measured. It is often numerically quantified using a variety of imperial units or SI-derived units, such as the cubic meter and liter (such as the gallon, quart, and cubic inch). The link between volume and length (cubed) is symbiotic. It is more common to think of a container's volume as its capacity rather than as the quantity of room it occupies. The amount of fluid (liquid or gas) that the container can hold is defined as its volume, in other words.Therefore,
The radius of the bowling ball = 8 cm
Weight of the ball = 2722 g
Volume of the bowling ball = 4 π r^2 = 4 x 3.142 x 8 x 8 = 804.352 cm^3
Density = Mass/Volume
⇒ Density of the ball = 2722/804.352
⇒ Density = 3.384 g/cm^3
Therefore, the density of the bowling ball is 3.384 g/cm^3.
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The density of the bowling ball is 3.384 g/cm^3. The mass of a substance per unit of volume is its density. Density is most frequently represented by the symbol, however Latin letter D may also be used.
What is Volume?A closed surface or object's volume is measured in three dimensions and is expressed mathematically. Cubic measurements of volume include m3, cm3, in3, etc. The term "volume" is sometimes used to refer to "capacity."
A three-dimensional space's occupied volume is measured. It is often numerically quantified using a variety of imperial units or SI-derived units, such as the cubic meter and liter (such as the gallon, quart, and cubic inch). The link between volume and length (cubed) is symbiotic.
It is more common to think of a container's volume as its capacity rather than as the quantity of room it occupies. The amount of fluid (liquid or gas) that the container can hold is defined as its volume, in other words.
Therefore,
The radius of the bowling ball = 8 cm
Weight of the ball = 2722 g
Volume of the bowling ball = 4 π r^2 = 4 x 3.142 x 8 x 8 = 804.352 cm^3
Density = Mass/Volume
⇒ Density of the ball = 2722/804.352
⇒ Density = 3.384 g/cm^3
Therefore, the density of the bowling ball is 3.384 g/cm^3.
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There are two types of hard water. Which type is softened by boiling?
The two types of hard water is temporary hard water and permanent hard water. Temporary hard water is softened by boiling.
What is hard water?
Hard water is known to be highly concentrated in calcium and magnesium largely due to to the ions of these elements dissolved in ground water that have the presence of these elements which could be sourced from rocks with the additional help with water from rain. A physical evidence that a water is hard water would be that it doesn't lather easily with soap.
Temporary hard water: the answer is temporary hard water as the heat from boiling would softened as the water produces calcium carbonate.Permanent hard water: this type of water doesn't break easily by heating as they contain compounds such as calcium sulphate.In summary, temporary hard water responds to heating which makes the water much more easier to be used for laundry, and drinking.
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A gas is at a pressure of 600. torr, and a temperature of 303 K. The temperature increases to
909 K. What is the new pressure of this gas?
A gas is at a pressure of 600. torr, and a temperature of 303 K. The temperature increases to 909 K. the new pressure of this gas is 1800 torr.
Given that :
P1 = 600 torr
T1 = 303 K
T2 = 909 K
P2 = ?
according to , Gay - lussac's law , we get
P1 / T1 = P2 / T2
substituting the values in the formula , we get
P2 = ( P1 T2 ) / T1
= ( 600 × 909 ) / 303
= 1800 torr
Thus, A gas is at a pressure of 600. torr, and a temperature of 303 K. The temperature increases to 909 K. the new pressure of this gas is 1800 torr.
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moths emit chemicals called pheromones to attract a mate. if a moth detects pheromones, how might it figure out which direction they are coming from?
When a male moth detects the pheromones emitted by female moth it uses the wind direction to determine the way .
What is a moth and pheromones and how male moth detect pheromones?Moth is a class of butterfly only with more silky appearance on the wings and body.Pheromones are the kind of chemicals secreted by female moth to attract the male moth for copulation.Male moth detects the presence of pheromones or their molecules by the means of olfactory system.After detecting the presence of pheromones , it orients its path through the wind direction.Attracting the mate is purposely for the mater of copulation.With very small plumes of pheromones spread over body the mate is attracted well.To know more about pheromones visit:
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you have 100 ml of solution that contains 1.95% (w/v) sodium citrate in water. you need to dilute this solution to a final concentration of 0.40% (w/v). what must the total volume of the solution be after adding water? how much water will you add?
Volume of water added is 1850 ml
What is solution?
The definition of a solution specifically relates to a certain class of homogeneous mixture, that is, a mixture with a uniform composition and no discernible differences between its constituent parts. This is distinct from a heterogeneous mixture, where each component can be seen separately.
The term "solutions" typically refers to mixtures of liquids, although it can also apply to combinations of gases or solids. The solvent, which often comprises a larger portion of the combination because it is the medium in which other chemicals will dissolve.
Mass of sodium citrate present in 100 ml of 1.95% (w/v = 1.95g
Volume of solution = Mass of sodium citrate/(w/v)x100
1950 ml
Total volume of the solution = 1950ml
Volume of water added = 1950-100
1850 ml
Therefore , Volume of water added is 1850 ml.
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how do bonds determine certain properties of compounds?
Chemical bonds determine certain properties of compounds because hardness, higher melting, and boiling points are related to bond formation.
How bonds can determine the properties of compounds?Atoms in a compound can be held together because of chemical bonds. When atoms form bonds, they get stability in the electron arrangement. To achieve stability atoms in a compound can lose, gain or share electrons. The type of bond that forms between two elements indicates the electronegativities of the elements. Large differences in electronegativity can lead to the formation of ionic bonds in a compound, while on the other hand, the smaller differences result in the formation of covalent bonds. Bond force determines the elastic modulus of a material. Similarly, stronger bonds will enable a material to resist higher temperatures before the bonds break and the material melts into a liquid.
So we can conclude that hardness, higher melting, and boiling points of compounds are related to bond formation.
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What is the difference between courtship behavior and territorial behavior? (1 point)
Responses
Territorial behavior is the animal of the same kind, but of the opposite sex. Courtship behavior is the production of offspring.
Courtship behavior is the animal of the same kind, but of the opposite sex. Territorial behavior is the production of offspring
Courtship behavior is used to attract a mate, and territorial behavior is used to protect an area in which an animal lives.
Territorial behavior is used to attract a mate, and courtship behavior is used to protect an area in which an animal lives.
Answer:
Explanation:
b.
The difference between courtship behavior and territorial behavior is that courtship behavior is used to attract a mate, and territorial behavior is used to protect an area in which an animal lives (option C).
What is courtship behavior?Courtship behavior or display is a set of display behaviors in which an animal, usually a male, attempts to attract a mate (female). This is done for reproductive reasons.
On the other hand, territorial behavior refers to any of the methods by which an animal, or group of animals, protects its territory from incursions by others of its species.
Courtship is usually done to find a suitable mate while territorial behavior is done to protect or demarcate an area.
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Which electron energy level transition corresponds to a hydrogen atom absorbing a visible light photon that has a wavelength of 656 nanometers?.
The electron makes the transition from energy level 2 to energy level 3
What is Transition of electron ?A movement (or jump) of an electron from one energy level to another within an atom or artificial atom is known as an atomic electron transition. In a few nanoseconds or fewer, the electron "jumps" from one quantized energy level to another, giving the effect of being discontinuous.
There are three different types of electronic transition that can be taken into account; electron transitions involving p, s, and n. transitions where charge-transfer electrons are involved electrons in d and f transitionsWhen electrons within a molecule are energised to move from one energy level to a higher energy level, molecular electronic transitions occur. The energy shift brought about by this transition reveals details about the molecular structure and controls a variety of chemical characteristics, including colour.Learn more about Electron Transition here:
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In the first distillation this week, which component of the original solvent mixture makes the larger contribution to the vapor pressure of the mixture?.
In the first distillation this week, Hexane from the original solvent makes a larger contribution to the vapor pressure of the mixture.
In between hexane and toluene, the hexane will have more vapor pressure contribution in the solution. The boiling point of hexane is much lower than toluene. Therefore, it will evaporate easily at low temperatures and start exerting pressure on the solution.
Hence between hexane and toluene, because of more vapor pressure of hexane and lower boiling point, it will easily evaporate and exerts pressure.
Therefore, from the original solvent, hexane makes a larger contribution to the vapor pressure of the mixture.
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What is charge of selenium ion ?
Answer:
+2 charge
Explanation:
The Se element has 6 valence electrons and hence, it requires 2 more electrons to attain stability or we can say that to complete its octet. Therefore, the ion of Se has +2 charge on it.
Plses give me braniliest
amino acids can be either polar or non-polar based on their choose... . in general, amino acids are non-polar if choose... are present. such amino acids are also referred to as choose... . other amino acids are polar and are generally referred to as
Non-polar is hydrophobic polar is hydrophilic. Non-polar is depends on hydrocarbon.
What is hydrophobic ion ?
In order to control the solubility of charged hydrophilic molecules of all sizes, from small molecules to big enzymes, a technique known as hydrophobic ion pairing has arisen. The resultant uncharged complex is water-insoluble and will precipitate in aqueous conditions when charged hydrophilic molecules are ionically paired with oppositely charged molecules that contain hydrophobic moieties. The effective encapsulation of charged hydrophilic molecules into nanoscale delivery systems, such as nanoparticles or nanocarriers, is one of the most well-known uses of hydrophobic ion pairing. Techniques designed for poorly water-soluble medicines are used to generate hydrophobic compounds, which are subsequently encapsulated. Researchers have documented encapsulation efficiencies of up to 100% and medication loadings of up to 30% using this method.
The foundations of hydrophobic ion pairing are covered in this paper, along with nomenclature, drug suitability for the process, frequently utilised counterions, and drug release of encapsulated ion paired complexes. Then, we concentrate on nanoformulation methods combined with hydrophobic ion pairing and list their advantages and disadvantages. The penultimate part connects the related topics of polyelectrolyte coacervation and polyelectrolyte-surfactant complexation with hydrophobic ion pairing. The state of the art and upcoming challenges are then covered. A thorough table of documented hydrophobic ion pairing and encapsulation from the literature concludes the review.
In the first- R group.
In second- only carbon and hydrogen.
In third- Hydrophobic
In fourth- Hydrophilic
Non-polar is hydrophobic polar is hydrophilic. Non-polar is depends on hydrocarbon.
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an atom of which element, moving at 240 m/s, would possess a de broglie wavelength of 1.40 x 10‒11 m?
Answer:
At - Sn - Cs - Mn.
Explanation:
This element's atom would have a de Broglie wavelength of 1.40 x 10-11 m if it were travelling at 240 m / s ? 6.626 x 10-34 Js / mass × 240 m/s = 1.40 x 10-11 m. An atom of which element, moving at 240 m/s, At, Sn, Cs, and Mn would possess a de broglie wavelength of 1.40 x 10‒11 m.
What is wavelength ?The difference between two successive crest or two successive trough is called as wavelength. Wavelength is denoted by lambda λ.
A spectrum is the term used to describe the range of wavelengths or frequencies for wave phenomena. The term was originally used to describe the electromagnetic spectrum, but it is now now used to describe the sound spectrum and vibration spectrum.
Thus, An atom of which element, moving at 240 m/s, At, Sn, Cs, and Mn would possess a de broglie wavelength of 1.40 x 10‒11 m.
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Please answer, I will mark brainliest
Answer:
Carbon Dioxide
Explanation:
"Carbon Dioxide is a pure substance made from two different elements so it is a compound."
fire extinguishers that can be used on any type of fire, a, b, or c generally contain a to extinguish the fire. a. water b. carbon dioxide c. nitrogen d. dry chemical powder
Answer:
b? im pretty sure
Explanation:
The process by which blank capture blank energy to convert blank and blank into blank and blank thereby storing some of the captured energy in chemical blank
The process by which autotrophs capture light energy to convert carbon dioxide and water into glucose and oxygen thereby storing some of the captured energy in chemical energy.
An autotroph is an organism that could produce its very own meals with the use of light, water, carbon dioxide, or other chemical compounds. because autotrophs produce their very own food, they're occasionally called manufacturers. plant life is the most acquainted sort of autotroph, captured energy but there are numerous unique forms of autotrophic organisms.
An autotroph or number one producer is an organism that produces complicated organic compounds using carbon from easy materials together with carbon dioxide, generally using electricity from light or inorganic chemical reactions.
Autotrophs are called producers due to the fact they may be able to make their personal food from raw substances and power. Examples consist of flowers, algae, and a few sorts of bacteria. Heterotrophs are known as purchasers due to the fact they eat manufacturers or different clients. dogs, birds, fish, and humans are all examples of heterotrophs.
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Air at 30,000 feet is at a temperature of -35.0 C. A sample of air was collected and the mixture is 75.56% nitrogen 23.15% O2 and 1.29% Ar if .594 moles of air are captured in a 45.0 L container from the plane
Calculate the total pressure
Calculator the partial pressures of each gas
Answer:
hope this help
Explanation:
Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.
What is partial pressure?Each gas that makes up a mixture of gases has a partial pressure, which is the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature.
Recognize that pressure refers to "total" pressure, meaning that all of the mixture's gases contribute to the overall pressure. Since each gas acts as a separate entity, the concept of partial pressure is developed from this. contributes to the overall pressure in a given proportion, which corresponds to its partial pressure.
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The amino acid alanine, CH3CH(NH2)CO2H, has a chiral centre. Illustrate both forms of this isomer and identify the type of isomerism shown.
Two form of isomer shown by Alanine amino acid is
a) L- alanine
b) D- alanine
Type of isomerism shown is Stereoisomers.
Amino acids are molecules that combine to form proteins. Amino acids and proteins are the constructing blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to assist the body.
Amino acids are required for the synthesis of body protein and other important nitrogen-containing compounds, which include creatine, peptide hormones, and some neurotransmitters. Despite the fact that allowances are expressed as protein, a the organic requirement is for amino acids.
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ionizing an h2 molecule to h2 changes the strength of the bond. based on the description of covalent bonding given previously, do you expect the h¬h bond in h2 to be weaker or stronger than the h¬h bond in h2?
From the fact that the bond order would reduce from one to 0.5, it shows that the ionized specie is weaker than the hydrogen molecule that has not yet been ionized.
What is the bond strength?The term bond strength has to do with how strong the bond that holds two atoms together is. We know that the stronger the bond, the more difficult it would be to break the bond by whatever means.
In this case, we are told that when we ionize the hydrogen molecule, the strength of the bond is changed. This implies that the bond would become weaker as the bond order of the specie would reduce from one to 0.5.
Also, the lesser the bond order, the weaker the molecule is. It then follows that the hydrogen molecule that has not been ionized with a bond order of one has a stronger bond than the ionized specie that has a bond order of 0.5.
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help please !! is this right?
According to the solution 6.51× 10²³ oxygen atoms of oxygen are contained in 47.6g of CO₂.
What is an atom?An atom is made up of the a core nucleus and one or more negatively charged electrons that orbit it. The positive charge, comparatively hefty protons and neutrons that make up the nucleus could be present. The fundamental building components of existence are atoms.
Briefing:Mole = mass/molar mass
Molar mass of CO₂ = 44.01g/mol
so, 47.6g/44.01 g/mol = 1.0815mol
For every C you have 2O, so you have 1 mol of C and 2 of O
1 mol = 6.02x10²³
Therefore,
1.0815 x (6.02x10²³) = 6.51× 10²³ oxygen atoms.
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The complete question is -
How many atoms of oxygen are contained in 47.6g of CO₂?
At what temperature would water boil at an atmospheric pressure of 55Kpa
At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
What is temperature?The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points or thermometric substances.
The most popular scales include the Celsius scale, sometimes known as centigrade, with the unit symbol °C, the scale of Fahrenheit (°F), or the Kelvin scale (K), with the latter being mostly used for scientific purposes. One of the Worldwide System of Units' (SI) seven base units is the kelvin. At 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
Therefore, at 78°C is the temperature at which water boil at an atmospheric pressure of 55Kpa.
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Who first developed a mathematical expression to relate the visible wavelengths of light emitted by the hydrogen atom?.
In 1885, a Swiss mathematics teacher, Johann Balmer (1825–1898), showed that the frequencies of the lines observed in the visible region of the spectrum of hydrogen fit a simple equation that can be expressed.
As a result, these lines are known as the Balmer series. The Swedish physicist Johannes Rydberg (1854–1919) subsequently restated and expanded Balmer’s result in the Rydberg equation:
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