Let's see that in the periodic table, we have the molar mass of every element. In this case, carbon has a molar mass of 12 g/mol and oxygen of 16 g/mol. The conversion from grams to moles is dividing the mass by the sum of the molar mass of the compound.
In this case, we have 1 atom of carbon and two atoms of oxygen. Doing the algebraic sum for each of them with their molar mass we're going to obtain:
[tex]\text{Molar mass of CO}_2=1\cdot12\frac{g}{mol}+2\cdot16\frac{g\text{ }}{mol}=44\frac{g\text{ }}{mol}[/tex]So, 225 g of carbon dioxide will be:
[tex]225gCO_2\cdot\frac{1molCO_2}{44gCO_2}=5.11molCO_2.[/tex]So, finally, we have 5.11 moles in 225 grams of CO2.
During a class demonstration, a model volcano “erupts” when the teacher adds vinegar to baking soda inside the volcano. Vinegar contains acetic acid, and baking soda is sodium hydrogen carbonate. When they are combined, a reaction occurs and bubbles form. Which gas is in the bubbles, and why do the bubbles form?
Answer:
Explanation:
Vinegar contains acetic acid, and baking soda is sodium hydrogen carbonate. When they are combined, a reaction occurs and bubbles form. Which gas is in the bubbles, and why do the bubbles form? Oxygen gas forms because an acid reacts with a metal.
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select all the correct statements regarding ion-dipole interactions. multiple select question. the magnitude of ion-dipole interactions is inversely proportional to the size of the polar molecule. ion-dipole interactions are responsible for the solubility of ionic compounds in aqueous solutions. the magnitude of ion-dipole interactions is inversely proportional to the charge on the ion. the typical magnitude of ion-dipole interactions is smaller than that of the van der waals interactions in a pure substance. an ion-dipole interaction exists between an ion and a polar molecule. ion-dipole interactions only occur in mixtures.
The correct statements regarding ion-dipole interactions includes:
the magnitude of ion-dipole interactions is inversely proportional to the size of the polar moleculeion-dipole interactions are responsible for the solubility of ionic compounds in aqueous solutions. ion-dipole interactions only occur in mixturesan ion-dipole interaction exists between an ion and a polar molecule.What is an ion-dipole interaction?An ion-dipole interaction is described as the intermolecular force of attraction between a charge ion (cation or anion) and a molecule. It is found commonly in the solution where ionic compounds dissolve in polar solvents.
The sodium chloride molecule is an example of the Ion-dipole interaction.
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Where would you expect light waves to move fastest?
A. Through an iceberg
B. On a mountaintop
C. In space
D. Under the sea
In space light waves move fastest, which is C. This is due to the fact that space is completely open and unrestricted and contains nothing that would do so.
What is Light waves?
The region of the electromagnetic spectrum that the human eye perceives as light, or visible light, is made up of electromagnetic radiation. Typically, visible light is characterised as having wavelengths between 400 and 700 nanometers (nm), or frequencies between 750 and 420 terahertz, which fall between the longer-wavelength infrared and the shorter-wavelength ultraviolet (with shorter wavelengths). The term "light" in physics can be used to more broadly describe electromagnetic radiation of any wavelength, whether or not it is visible. Gamma rays, X-rays, microwaves, and radio waves are all forms of light in this sense. Intensity, propagation direction, frequency or wavelength spectrum, and polarisation are the four main characteristics of light.
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Rounding to the appropriate number of significant digits, calculate 5.37801 - 2.005.
3.4
3.373
3.37301
3.37
Rounding to the appropriate number of significant digits is equal to: B. 3.373.
What is a significant figure?In Mathematics, a significant figure can be defined as the number of digits in a numerical data (value), typically a measurement, which enhances its degree of accuracy.
In this exercise, you're required to evaluate the given mathematical expression by subtracting the numerical data (2.005) from the numerical data (5.37801), and then round to the appropriate number of significant digits as follows:
Expression = 5.37801 - 2.005.
Expression = 3.37301
Next, we would round up to four (4) significant figures because the last significant figure before zero (0) is eight (8):
Expression = 3.373
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jacob finds that a compound has a molar mass of 128 g/mol and an empirical formula of so2. what is the molecular formula of this compound?
It is the simplest whole number ratio of elements in a compound. Molecular formula is n times the empirical formula where n is integers 1,2,...The empirical formula is S₂O4.
What is empirical formula?
Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.
The relation between emperical formula and molecular formula is given as
n=Molar mass ÷empirical formula molar mass (1)
Where n= integers 1,2,3.....
Molar mass =128 g/mol
Empirical formula molar mass of SO₂=molar Mass of sulphur+2×Molar mass of oxygen (2)
Molar mass of sulfur= 32g/mol
molar mass of oxygen = 16g/mol
substituting the values in equation 2 we get
Empirical formula molar mass of SO₂=32g/mol+2× 16g/mol= 64g/mol
Substituting the values in equation (1) we get
n=128 g/mol÷ 64g/mol
n= 2
Molecular formula= n× empirical formula
= 2×SO₂
= S₂O4
Thus the molecular formula is S₂O4.
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please help i will mark you brainliest
Answer:
Explanation:
The heater may still work for a few seconds because of the battery, and until the wind starts again the heater would not work
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Q1- in one or two sentences, state whether you would expect the condition to be a greater hazard for divers as they dive down or as they return to the surface. then, explain your prediction in terms of the solubility of gases in liquids at different pressures.
A-Nitrogen gas levels grow when divers descend into water due to increased pressure. The solubility of gases and liquids increases as pressure increases, this is due to the existence of collective properties. As they plummet down, the diver would be in more risk from exposure to high levels of nitrogen gas.
Q2- Hydrogen selenide (H2Se) reacts with water according to the following equation.H2Se + H2O → SeH– + H3O+
In three to five sentences, identify the acid, base, conjugate acid, and conjugate base in this reaction. Use patterns in the periodic table to explain why the substances you identified acted as the acid and the base in this reaction.
A- The acid is H2Se, the base is H20, the conjugate acid is H30+, and the conjugate base is SeH. The conjugate base is the specie formed from the acid after it donates a proton which is called the conjugate acid. The specie formed from the acid after it donates a proton is called the conjugate base while the specie formed from the base after accepting a proton from the acid is called the conjugate acid.
Q3- How you could adjust the settings of the simulation to increase the number of red (H3O+) and blue (A-) particles in the solution of equilibrium
A- Because there aren't many HA particles in the solution, the pH of the solution decreases as I increase the strength. So, if I reduce the strength, the pH will rise along with the HA particles and the red and blue particle numbers will drop.
Divers are most at risk when they return to the surface due to the decreased solubility of nitrogen gas in the blood.
In the reaction, the acid is H₂Se, the base is H₂0, the conjugate acid is H₃O⁺, and the conjugate base is SeH.
Increasing the concentration of HA will increase the number of red (H₃O⁺) and blue (A⁻) particles in the solution in chemical equilibrium.
Do divers face the greatest risk divers as they dive down or as they return to the surface?Divers are individuals who dive to great depths in the oceans.
Divers may dive freely without extra gas cylinders or they may dive with gas cylinders containing a mixture of oxygen and nitrogen.
Since gas solubility increases with pressure and decreases with pressure, nitrogen gas bubbles form as divers surface from the depths.
2. Acids are substances that donate protons, whereas bases accept protons.
Conjugate acids are formed when acids donate protons, whereas conjugate bases are formed when bases accept protons.
3. The equation of the reaction is given below:
HA (aq) + H₂O (l) ⇄ H₃O⁺ (aq) + A⁻ (aq)According to the principle of chemical equilibrium, equilibrium will shift to a position that annuls any constraint placed on the system in equilibrium.
Therefore, increasing the concentration of Ha will result in an increase in H₃O⁺ and A⁻ particles in the solution.
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What is the name of KIO3?
answer:pubchem or potassium iodate
Question: What is the name of KIO3?
Answer: Goodmorning: } The name for KIO3 is Potassium iodate | KIO3 - PubChem.
Explanation: Potassium Iodate tablets are used at the time of a nuclear emergency; the tablets stop the thyroid gland (situated in your neck) taking up radioactive iodine, which may be released into the environment following a nuclear accident.
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can a dog walk 74m in 55s for 5h
Some fit dogs can tolerate up to 2-hour walks and many hours of hikes.
As a rule of thumb, a dog can walk for 5 minutes each month for 8 weeks. That means a 2-month-old puppy can walk for about 10 minutes. Also, a 3-month-old baby can walk for 15 minutes. 20 minutes for a 4-month-old child. There is no limit to how far you can walk your dog, as long as your dog is comfortable. For some dogs, it's around the block.
Ten miles for others. Remember to build up distance and endurance gradually over time. Rest days are more likely to focus on being together than on fulfilling the duty of walking the dog so rest days should be spent with humans. It is often beneficial for dog bonding. PetMD says he recommends walking the dog for 10 to 15 minutes with her two to three times a week.
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A mixture of gases contains 12. 0 grams of n2 and 15. 0 grams of ar, under a total pressure of 1. 32 atm. What is the partial pressure of n2?.
A mixture of gases contains 12. 0 grams of n2 and 15. 0 grams of ar, under a total pressure of 1. 32 atm. What is the partial pressure of n2?.
The partial pressure of n2 in the mixture of above gases is 0.7atm.
What is partial pressure?
Each gas in a mixture of gases has a partial pressure, which is the pressure that would exist if that gas alone had filled the complete volume of the original mixture at the same temperature.
N=12.0, Ar=15.0
Total pressure=1.32
Partial pressure of n2=?
WN2=12.0
WAr =15.0
nN2=12/28 =0.42
nAr=15/40 =0.37
Xn2=0.42/0.42+0.37 =0.53
Pn=Xn2×Ptotal
=0.53×1.32=0.69atm that ie nearly equal to 0.7atm
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What kind of food provides energy for much of the human population
The food substance which gives energy for humans are the carbohydrates.
Why carbohydrates provides energy?It follows that among the classes of food substances, the group of food or diet which has the highest calories supply of energy are the carbohydrates. These carbohydrates are the energy giving food.
Aside carbohydrates, other food classes include the following:
ProteinsMineral saltsVitaminsFats and oilsRoughagesWater.The proteins helps in building the body. The vitamins are the body regulating and protecting food.
So therefore, we can now deduce that when we consume foods such as rice, maize and others forms of carbohydrates, it gives us energy.
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If 6 atoms of hydrogen are in the reactant of a chemical reaction, how many atoms of hydrogen must be present in the product of the reaction? Please hurry!
Answer:
6
Explanation:
there always has to be the same number of atoms on both sides of the equation
nswer
Draw and name the following compound
CH3CHCHCH(CH3)CH(CH3)CH2CH2CH3
CECEC-
CH3CH CH3 ch2ch2ch3 stand for Five carbon atoms make up the longest carbon chain. A methyl group can be found at carbon-3 as well. Thus, 3-methylpentane is its IUPAC designation.
What is CH3CH CH3 CH2CH2CH3's IUPAC name?Butene is the IUPAC designation for CH3CH2CH = CH2.Position isomers CH3CH=CHCH3 and CH3CH2CH=CH3 exist because they share the identical chemical formula (C4H9) and differ only in the location of unsaturation.With 10 sigma and 3 pi bonds, CH2 = CH - C - CH3 is a compound. One sigma bond and one pi bond together form a double bond. One sigma and two pi bonds make up a triple bond.The alkene CH3=CH2=CH3 is known as 2-pentene. The first carbon atom of the double bond is given the lower number at the end of the chain, which is numbered from there.To Learn more About 3-methylpentane, Refer:
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Calculate the energy possessed by a single photon of the following type of electromagnetic radiation: frequency 5.23 x 10^20 s^-1
E = h v, where E is the energy (in SI units of J), h is the Planck constant (h = 6.626 x 10-34 J s), and is the frequency of the radiation, gives the energy associated with a single photon (SI units of s–1 or Hertz, Hz)
One photon's energy (E) is (6.626 x 10(-34)Js) x (5x x 10(10)s) s(-1) ` '=33.1 xx 10^(-24)J' Energy of a single mole of photons is equal to "Energy of a single photon" x "Avogardro's number of photons" It reads "=(33.1 xx10(-24)J)xx (6.022 xx 10(23))=19.93J".
Radiation can be thought of as either waves or as discrete particles known as photons. A single photon's energy is given by the formula E = hv, where E is its energy (measured in SI units of J), h is Planck's constant (6.626 x 10-34 J s), and ∨ is the radiation's frequency (measured in SI units of s-1 or Hertz, Hz) (see figure below).
Wavelength and frequency are connected by the formula λ = c/∨, where c is the speed of light, which is 2.998 x 108 m s-1. Wavenumber, or σ = 1/λ, is another quantity that you will frequently see. It is typically expressed in units of cm-1.
A single photon with wavelength has the following energy:
E = (hc / λ) = (1.983 x 10 ^(-16) J nm/photon) / λ
Em = (hcNa / λ) = (1.196 x 10^8 J nm/mol)/λ
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when acetic acid reacts with aluminium hydroxide, a salt of aluminium acetate is formed. Water is also produced. word equation answer?¿
Explanation:
The molecular formulas for the reactants and products are:
Aluminum acetate - Al(CH3COO)3
Potassium hydroxide - KOH
Aluminum hydroxide - Al(OH)3
Potassium acetate - KCH3COO
Therefore the unbalanced reaction equation can be written as:
Al(CH3COO)3+KOH→Al(OH)3+KCH3COO
How many moles in 149 grams of carbon dioxide in CO2
Answer:
3.39 mol
Explanation:
n = m/M, where n is moles, m is mass and M is molar mass.
n = 149/44.01
n = 3.38559418314 mol
n = 3.39 mol
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which of the following atoms is the smallest? V,Cr, W
Helium has the smallest atomic radius.
An atom is the smallest unit of regular count number that paperwork a chemical detail. each stable, liquid, gas, and plasma consists of impartial or ionized atoms. Atoms are extremely small, commonly around 100 picometers across.
An atom is a particle of be counted that uniquely defines a chemical element. An atom consists of a primary nucleus this is surrounded by way of one or greater negatively charged electrons. The nucleus is definitely charged and includes one or more notably heavy debris referred to as protons and neutrons.
An atom is any particle of count number at its maximum fundamental stage which incorporates at least one proton. right here are a few examples of the atoms: hydrogen H and neon Ne.
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measurement of the concentration of fe3 ions in a saturated solution of iron(iii) chloride was found to be 0.41 m. calculate the ksp of iron(iii) chloride.
fe3 ions were discovered to be 0.41 m in a suitable solvent of iron(iii) chloride. Iron(iii) chloride has a ksp of 0.82x1037.
How is Ksp determined?The concentrations are "plugged in" after writing down the equation for Ksp to get the value for Ksp. Here is an illustration: Ag2CrO4 dissolves in water at a rate of 1.31 x 10-4 moles/L. Determine the Ksp value. The [Ag+] will increase by (2 x 1.31 x 10-4 moles/L) = 2.62 x 10-4 moles/L using mole ratios.
FeOH3 is a precipitate, right?The equilibrium characteristic for the dissolving of a solid material in an aqueous solution is known as the item solubility constant, or solubility product constant. M is used to represent molar saturation, and products
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Write 25 facts about toy cars
Facts about toy cars is toy car move with a friction motor
Toy car means a miniature nonfunctioning replica of car and this is play a children called as toy car and the fact of toy car is
Toy car and vehicle provide a fun sources of entertainment while building motors cognitive and social skills at the same timeThey give children's an opportunity to use their imagination and create their own adventuresToy car is also called as model car it is a miniature representation of an automobileThe toy car is invented by jim mariol who was granted a design patent for toy automobileToy car move because of fiction motor and it is a simple mechanism to propel the toy carThe motor consist of large flywheel which is connected to the drive wheels of the toyThe speed of the toy car is 4m/s just before hitting the groundToy car is made up of either lead alloy or alloy of zinc with small quantity of aluminum and copperToy car teach the children's about distance, spatial awareness, velocity, weight and gravityKnow more about fact of toy car
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draw and label of an basic oxygen furnace
Basic Oxygen Furnace Steelmaking is known as the dominant steelmaking technology, producing approximately 67% of the world's total output of crude steel.
What is Basic Oxygen Furnace?More than half of the steel used in the world is produced using the basic oxygen process (BOP), which utilizes pure oxygen to turn a charge of liquid blast-furnace iron and scrap into steel.
In order to supersonically blow oxygen onto the charge, a vertically movable, water-cooled lance is inserted into the basic oxygen furnace (BOF), which is a tiltable converter lined with refractory (see figure).
Because the elements present in blast-furnace iron quickly oxidize when pure oxygen is used at high flow rates, only about 20 minutes are required for each heat, or to refine one charge.
Check the diagram below to see labels of an basic oxygen furnace ↓↓↓
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Calculate the mass of sample of Palladium in lbs if the heat of fusion of Pd is 162J/g and it takes 686J of energy to melt the sample.
2In what way are liquids different from solids?
Answer:
solid: Relatively rigid, definite volume and shape. In a solid, the atoms and molecules are closely bonded that they vibrate in place but don't move around. liquids: Definite volume but able to change shape by flowing. In a liquid, the atoms and molecules are loosely bonded.
Explanation:
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Units of measurement provide which of the following?
a. a standard comparison of measurements
b. a magnitude of the measurement
c. uncertainties of measurement
d. all of the above
Option A is correct. a standard comparison of measurements. Regardless of precision and accuracy, all measurements are subject to some degree of uncertainty.
This is due to two things: the measuring device's limitations (systematic error) and the measurement skills of the experimenter (random error). A variance or its square root, which is a standard deviation, is used to measure uncertainty. The term "standard error" is also (and more frequently) used to refer to a statistic's standard deviation. Variability leads to the emergence of uncertainty. The standard deviation serves as the foundation for the definition of standard uncertainty, which is represented by a small u. Here, it's important to emphasize three key aspects of standard uncertainty: Even for non-normally distributed quantities, the standard deviation can be calculated.
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a compound of carbon and hydrogen contains 85.63% c and has a molar mass of 84.16 g/mol. what is its molecular formula? chempadhelp
C6H12 is its molecular formula.
What is molecular formula?
Two or more atoms that have been chemically bonded make up a molecule. A molecular formula is the chemical representation of a molecular compound that lists the types and quantities of atoms that make up each molecular unit.
% Carbon equals 85.63%.
Hydrogen percentage:
100% - 85.63% = 14.37%
84.16 g/mol for molar mass
Molecular formula is: =?
% should be treated as mass (g) and their atomic mass divided.
C = 85.63 / 12 = 7.14
H = 14.37 / 1 = 14.37
Subtract the smallest number from both.
C = 7.14 / 7.14 = 1
H = 14.37 / 7.14 = 2.01
, CH2 is the empirical formula.
Empirical weight is equal to 12 + 2 = 14.
n = Molecular weight/Empirical weight
n = 84.16 / 14 = 6.01
Empirical formula times n yields the molecular formula.
Now,
C6H12 = (CH2)n = (CH2)6
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State two conclusions that were made concerning the structure of an atom.
The nucleus, which has a positive charge, is the center of an atom. The nucleus of an atom contains almost all of its mass, and the electrons orbit the nucleus in precise ways.
DNA is organized into chromosomes and is located in the nucleus, which is in the center of each cell. A double nuclear membrane (outer and inner) that separates the cytoplasm from the nucleus is called the nuclear envelope, which encircles the cell. The nucleus houses the genes, structures that hold the hereditary information, and regulates and controls the functions of the cell (such as growth and metabolism). In the nucleus, nucleoli, which are tiny bodies, are frequently seen. Nucleoplasm is the matrix that resembles a gel and contains the various nuclear parts.
The nucleus of a cell is made up of chromosomes, nucleoplasm, nucleolus, and a nuclear membrane known as the nuclear envelope. The matrix that exists within the nucleus is referred to as nucleoplasm, also known as karyoplasm. The cytoplasm and the nucleus' components are separated by the nuclear membrane.
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Need help nowwwwww please
Oxygen has 6 Valence electrons
Valence shell gains two electrons to achieve complete Valence shell
Sulfur has 6 Valence electrons
valence shell gain 2 electrons to achieve full valence shell.
Fluorine, Chlorine, Bromine and Iodine have 7 Valence electrons and gain 1 electron to achieve full valence shell.
Helium has two Valence electrons and gain 2 electron to achieve full valence shell.
Neon, Argon, Krypton, Xenon and Radon have 8 Valence electrons and have full valence shell.
Elements like fluorine , chlorine, bromine and iodine are called halogens. They are the high reactive non-metals in group 17 of the periodic table. They have seven valence electrons and therefore gain one electron to have a full valence shell.
Non-reactive, non-metallic elements in group 18 of the periodic table that include helium , neon , argon krypton , xenon , and radon are noble gases. They the least reactive of all known elements, because they have eight valence electrons and hence outer energy levels are full.
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a 50.0 ml sample of 0.100 m hclo4 is titrated with 20.0 ml of 0.200 m naoh. what is the ph of the resulting solution?
At the equivalence point moles H+ = moles OH- so pH = 7.00 is the pH of the resulting solution.
How is pH determined?There are two ways to measure pH calorimetrically with indicator fluids or sheets and electrochemically with electrodes and a millivoltmeter for greater accuracy (pH meter).
Briefing:Moles HClO₄ = 0.05 L x 0.100 M = 0.005
Moles NaOH = 0.02 L x 0.200 M=0.004
Moles HClO₄ in excess = 0.005 - 0.004 =0.001
Total volume = 0.07 L
[H+]= 0.001/ 0.07L=0.01428 M
pH = - log 0.01428=1.84
At the equivalence point moles H+ = moles OH- so pH = 7.00
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help!!!
If Beryllium is electrically neutral, how many electrons does it have?
A chemical element with the atomic number 4 and the symbol Be is known as beryllium. It is an alkaline earth metal that is steel-gray in color, tough, light, and brittle. It is a divalent element that only naturally occurs in minerals when combined with other elements. Beryl and chrysoberyl are well-known gemstones that contain a lot of beryllium.
Any element's atomic number indicates how many protons or electrons are found in that element.
Since beryllium has an atomic number of 4, it is obvious that it contains 4 protons and 4 electrons.
On the other hand, the mass number of an element denotes the total number of protons and neutrons that make up an element's atomic nucleus.
Since beryllium has a mass of nine, there are also nine protons and neutrons in its mass.
Thus, there are 9 - 4 = 5 neutrons in the system.
As a result, there are 4, 4, and 5 protons, electrons, and neutrons present in beryllium, respectively.
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Explain the energy transformation of a bouncing ball.
Answer:
Elastic potential energy is what causes a ball to bounce, or rebound, because it is transformed into kinetic energy, which is then used to bring the ball back up.
Explanation:
Which of the following statements correctly describe the format used to represent an ionic compound?
a. tonic bonds generally form when a metal bonds to a nonmetal
b. The attraction between the oppositely charged ions is called the lonic bond
c. Na+ and Cl- share electrons to form a stable compound.
d. Na loses an electron to form the cation Na'.
e. Closes an electron to form the anlon CIT.
The statement that correct are a, c and d, which are saying, "Ionic bonds are generally formed when a metal bonds with a non-metal"; "Na+ and Cl- share electrons to form a stable compound. and Na loses an electron to form the cation Na'.
The chemical bond that is formed when the complete sharing of electrons take place, is called a Ionic bond.
Generally, metals loses and electron and non-metals tend to gain an electron. This is why Ionic bonds are usually formed between metals and non-metals.
The ionic bonds are formed when sharing of electron takes place not only by the attraction.
Na⁺ and Cl⁻ shares electrons to form bonds, this statement is true.
Also, the statement saying that Na⁺ cation is formed by the losing of one electron by Sodium. It is true.
Because sodium is a metal, it loses an electron and chlorine is a non-metal, it gains an electron so that they both can form a bond between the, share there electrons and form a stable compound.
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