Answer: thunderstorms
Explanation:
which of the following statements is false regarding the equilibrium constant, kc?13)a)the numerical value of kc depends on the form of the balanced equation.b)kc for a reaction at a particular temperature always has the same value.c)when quoting kc it is customary to omit units.d)kc for the reverse reaction is the negative of kc for the forward reaction
Kc for the reverse reaction is the negative of Kc for the forward reaction is the false statement.
What is equilibrium constant?The equilibrium constant of any chemical reaction is the value of its own reactions quotient at chemicals equilibrium, a State approaches by a dynamically chemicals systems after sufficient times has elapsed at which is in its compositions has no measurable tendency towards furthermore change.
As we know,
Value of Kc for the reverse reaction is always in the from of reciprocal.
Let's take
A<----------------> B,Kc
For reversion reaction we have to take
B<------------------>A,1/Kc
In this equation all the statement are correct.
Thus Kc for the reverse reaction is the negative of Kc for the forward reaction is the correct answer.
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A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving bat this speed and in this direction? Explain.
Answer: 8N (8 kg/ms")
Explanation: F= M*A
F= (2KG)*(4/MS") = 8N
Which of the following is NOT a correct formula unit for a salt made from main group elements?
Group of answer choices
KF
Na2S
Ca2O
Mg3N2
The formula unit of a salt that is not correct is [tex]Ca_{2} O[/tex] in option C.
What is a salt?A salt is almost always made up of a metal and a nonmetal element. The salts as we know them are mostly ionic in nature and they are known to be able to dissolve in solution when they are put into solution.
We know that the salt that they meant to show in option C is calcium oxide and the foregoing can not be the correct formula since both the calcium and the oxygen ions are divalent. The correct formula of the salt would be CaO.
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a government agency recommends that the amount of arsenic in drinking water should not be above 0.01 ppm. at this concentration, how many grams of arsenic would you expect to find dissolved in 1000 ml of pure water?
The formula for PPM =100 /1,000,000=0.01 PPM = 100 / 1 , 000 , 000 = 0.01 . i.e concentrations of arsenic should be less than 0.01 *1000 therefore it should be less than 10 ml for 1000ml of water.
This stands for "parts per million" and can alternatively be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both signify the same thing. It provides information about a substance's density when it is dissolved in water. Examples include total alkalinity, calcium hardness, and free chlorine. A substance has a PPM of 1 if it makes up one millionth of the entire amount of water.
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what are the correct coefficients if the law of conservation of mass is applied to the decomposition of solid ammonium nitrite to nitrogen gas and liquid water?
The correct equations for the breakdown of solid ammonium nitrite to nitrogen gas and liquid water under the law of conservation of mass would be 1 mol of solid ammonium nitrite to 1 mol of nitrogen gas and 1 mol of liquid water.
Since matter cannot be generated or destroyed, according to the rule of conservation of mass, the total mass of the reactants and products in a chemical process must remain constant. The balanced chemical equation for the breakdown of solid ammonium nitrite is:
NH4NO2(s) N2(g) + H2O (l)
The coefficients in this equation stand for the ratio of moles of each reactant and product. According to the factors 1, 1, and 1, 1 mol of nitrogen gas and 1 mol of liquid water are created for every 1 mol of solid ammonium nitrite that is broken down. As required by the rule of conservation of mass, this indicates that the combined mass of the reactants and products remains constant.
Ammonium nitrite ,[tex]$\mathrm{NH} 4 \mathrm{NO}$[/tex], will decompose to yield nitrogen gas and water Vapor by the following equation:
[tex]\mathrm{NH}_4 \mathrm{NO}_2(s) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(\mathrm{g})+\mathrm{N}_2(g)[/tex]
What is a decomposition reaction?
A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products.
Ammonium nitrite, [tex]$\mathrm{NH} 4 \mathrm{NO} 2$[/tex], will decompose to yield nitrogen gas and water Vapor by the following equation:
[tex]\mathrm{NH}_4 \mathrm{NO}_2(s) \rightarrow 2 \mathrm{H}_2 \mathrm{O}(g)+\mathrm{N}_2(g)$$[/tex]
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What is the IUPAC name for the compound N₂O3?
Answer: Dinitrogen trioxide
Explanation:
Rannan wants to perform a scientific experiment. He writes out a systematic process that involves him making observations and then forming his opinion about those observations. He then collects his opinions together and uses them to show that his findings are supported by evidence.
He shouldn't present his opinions as evidence.
What is the definition of a hypothesis?
A hypothesis is a tested assertion regarding the relationship between two or more variables or a theory put up to explain an observed occurrence in a scientific setting.
The complete population should be examined in order to ascertain whether a statistical hypothesis is accurate. As it is frequently impractical, researchers usually look at a random sample of the population. The statistical hypothesis is rejected if the sample data do not support it.
Making an experiment is the most typical method of testing a theory. A good experiment employs test subjects or establishes situations where you may determine whether your hypothesis appears to be true by assessing a wide array of of data (test results).
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A kangaroo was 396 meters east of a lake. In 12 seconds, the kangaroo hopped one-third of the way to the lake at a constant velocity. What was the kangaroo's velocity?
The velocity of an object is the ratio of the distance to the time. The distance travelled by Kangaroo is 396 m in 12 seconds. So its velocity is 33 m/s.
What is velocity?Velocity is a physical quantity and it is the measure of distance travelled per unit time. Velocity is the rate of speed and it is a vector quantity.The velocity can be expressed in terms of m/s, Km/hr etc.
Mathematically, velocity is the ratio of distance to the time.
Given that, distance covered by kangaroo is 396 meters.
time taken = 12 s.
therefore, velocity can be calculated as follows:
velocity = distance/time
= 396 m / 12 s
= 33 m/s.
Therefore, the velocity of the kangaroo is 33 m/s.
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A sample of gas is a closed container at a temperature of 18 celsius and a pressure of 2.5 atm is heated to 150 celsius. What pressure does the gas exert at the higher temperature?
The pressure that the gas exerts at the higher temperature would be 20.83 atm.
Gay-Lussac's lawAccording to Gay-Lussac's law, the pressure that a gas will exert on its container is directly proportional to the temperature of the gas, provided that the volume remains constant throughout.
This law can be mathematically expressed as:
[tex]p_1/t_1 = p_2/t_2[/tex]
Where:
[tex]p_1[/tex] is the initial pressure of a gas[tex]t_1[/tex] is the initial temperature[tex]p_2[/tex] is the final pressure[tex]t_2[/tex] is the final temperatureIn this case, the initial temperature is given as 18 [tex]^oC[/tex], the initial pressure is given as 2.5 atm, and the final temperature is given as 150 [tex]^oC[/tex], We are to find the final pressure.
[tex]p_2[/tex] = [tex]p_1t_2/t_1[/tex]
= 2.5x150/18
= 20.83 atm
In other words, the new pressure that the gas will exert at a temperature of 150 [tex]^oC[/tex] would be 20.83 atm.
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what has very good electrical conductivity
the aerobic decomposition of biomass produces significant quantities of methane. question 15 options: true false
The statement given is "False" that The Aerobic decomposition of biomass produces significant quantities of Methane.
What is aerobic decomposition?
The decay or breaking down of organic material in the presence of free or dissolved oxygen (DO).
What does aerobic decomposition produce?
Compost, water (both liquid leachate and gaseous vapor), and volatilized gases are all products of aerobic composting (ammonia, carbon dioxide and, occasionally, gases perceived as odors). Digestate and biogas are created during anaerobic digestion.
Is aerobic decomposition faster than anaerobic?
You can get finished compost sooner if there is enough air available because aerobic decomposers function faster and more effectively than their anaerobic cousins.
The aerobic composting produces water vapor, carbon dioxide and a black organic material.To know more about aerobic decomposition:
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please answer the following
Answer: Kinetic Energy
Explanation:
Gravitational potential energy of each drop converts to kinetic energy when water drops into a reservoir.
how many moles of chloride ions are there in a mixture of 2mol of barium chloride and 1 mol of pottassium chloride
The chloride ions in a mixture of 2mol of barium chloride and 1 mol of potassium chloride are 3 moles
What is Barium chloride?Generally, Barium chloride is an inorganic compound with the formula BaCl2. It is a white solid that is highly soluble in water. It is commonly used as a test for detecting the presence of sulfates in a solution and as a precursor to other barium compounds. Barium chloride is toxic if ingested, so it should be handled with caution.
There are a total of 3 moles of chloride ions in the mixture of 2 moles of barium chloride and 1 mole of potassium chloride.
Barium chloride contains 2 moles of chloride ions, and potassium chloride contains 1 mole of chloride ions, for a total of 2 + 1 = 3 moles of chloride ions.
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Which type of isomers are o-xylene, m-xylene, and p-xylene?
structural isomers
optical isomers
geometric isomers
o-xylene, m-xylene, and p-xylene are structural isomers.
o-xylene, m-xylene, and p-xylene are examples of aromatic isomers, also known as ortho-, meta-, and para-xylene, respectively. These isomers are classified as aromatic because they are part of a family of compounds known as aromatic hydrocarbons, which contain a ring of six carbon atoms bonded to each other in a specific way.
o-xylene, m-xylene, and p-xylene are also examples of structural isomers. Structural isomers are compounds that have the same molecular formula but differ in the arrangement of their atoms. In the case of o-xylene, m-xylene, and p-xylene, the atoms are arranged differently around the ring of six carbon atoms.
o-xylene, m-xylene, and p-xylene are not optical isomers, which are also known as enantiomers. Optical isomers are compounds that are mirror images of each other but are not superimposable. Optical isomers are important in medicinal chemistry because they can have different biological properties even though they have the same molecular formula and structure.
o-xylene, m-xylene, and p-xylene are also not geometric isomers. Geometric isomers are compounds that have the same molecular formula and the same arrangement of atoms, but differ in the orientation of their atoms or groups of atoms in space. Geometric isomers are often found in compounds with cis-trans double bonds or ring structures.
which type of substance is fast acting, either immediately suffocating the victim or causing massive burning?
Substance is fast acting, either immediately suffocating the victim or causing massive burning is chemical weapons.
Chemicals used to intentionally kill or damage people through their poisonous qualities are known as chemical weapons. Chemical weapons also include weapons, apparatus, and other gear made expressly for turning hazardous substances into weapons.
What chemical weapon has the highest lethality?
What VX is VX is a nerve toxin that was created by humans for use in chemical warfare. The most dangerous and quickly acting of the known chemical warfare agents are nerve agents.
Basically, these weapons were just common munitions like grenades and artillery rounds that had well-known industrial chemicals added to them. Among the chemicals employed were chlorine, mustard gas, which causes terrible skin burns, and phosgene, a choking toxin.
The most critical effects are paralysis of the respiratory muscles and inhibition of the respiratory center. Ultimately, death results due to respiratory paralysis. If the concentration of the nerve agent is high, death is immediate.
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What is the correct molecular formula for the compound magnesium chromate pentahydrate?
MgCrO4•5H2O is the answer
The correct molecular formula for the compound magnesium chromate pentahydrate is as follows: MgCrO₄•5H₂O.
What is molecular formula?Molecular formula in chemistry is a notation indicating the number of atoms of each element present in a compound.
Chemical or molecular formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.
The chemical formula also reveals information about the types and number of atoms that make up a chemical compound or molecule.
For example; a chemical compound named magnesium chromate pentahydrate will have a chemical formula of MgCrO₄•5H₂O.
This tells us that the compound contains magnesium, chromium, oxygen, and hydrogen atoms.
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what will be the ph change when 20.0 ml of 0.100 m naoh is added to 80.0 ml of a buffer solution consisting of 0.166 m nh3 and 0.186 m nh4cl? (assume that there is no change in total volume when the two solutions mix.)
The pH change is +0.125 when 20.0 ml of 0.100 m naoh is added to 80.0 ml of a buffer solution consisting of 0.166 m nh3 and 0.186 m nh4cl.
Find the moles of NaOH and the moles of your initial acid and base, calculate the new molarities, and use the henderson-hasselbalch equation with your new concentrations. So I used the pKa of NH4Cl for the initial pH. (9.3). pH = 9.3 + log (0.169M/0.183M), and I measured 9.265, which is slightly different. Then, using M = mol/L 0.1M = x mol/0.02L, I calculated the moles of NaOH, which were 0.002. I used the same method to determine the moles of NH3 and NH4Cl, which were 0.0135 and 0.01464, respectively, after determining the moles of NaOH.When a strong base is added to a buffer, the acidic component reacts with the added base, releasing OH- ions and increasing the moles of acid and base, respectively. With this information, I added the number of moles of NaOH to the moles of NH3 0.0135 + 0.002 = 0.0155 moles and subtracted the number of moles of NaOH from the moles of NH4Cl 0.01464 - 0.002 = 0.01264 moles, then calculated the molarities by dividing the moles by (0.08 L + 0.02 L to account for the addition of NaOH), and calculated the new concentrations.[NH3] = 0.155M, [NH4Cl] = 0.1264M, now that we have the new concentrations of acid and base, substitute them into the H-H equation to get the new pH: pH = 9.3 + log (0.155/0.1264) = 9.39.9.39 - 9.265 = a pH change of +0.125.
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Plastic beads used in jewelry making are made of long molecules usually consisting of carbon, hydrogen, and oxygen. Compare the bonding in these molecules to the bonding in gems.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, gems have ionic bonding and plastic beads have covalent bonding.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. Gems have ionic bonds formed between metals and nonmetals. Plastic beads, will have covalent bonds because it is easily deformed.
Therefore, gems have ionic bonding and plastic beads have covalent bonding.
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How specifically is kinetic energy lost during a car crash?
Answer + Explanation:
During a car crash, kinetic energy is lost through various forms of deformation of the vehicle and the generation of heat.
When a car collides with another object, the force of the impact causes the vehicle's body and structure to deform. This deformation absorbs some of the kinetic energy and converts it into other forms of energy, such as heat and sound.
In addition, friction between the moving parts of the car and between the car and the road can also generate heat, which absorbs some of the kinetic energy.
The amount of kinetic energy lost during a car crash depends on the mass of the vehicle, the speed at which it was traveling, and the type and severity of the collision. In general, higher speeds and more severe collisions result in greater kinetic energy loss.
color of the solution in the control changed? 4) infer. when you began the experiment, was there co2 in the water? in the test tubes that contained elodea, where did the co2 go?
The water was, indeed, green. This signifies a low carbon dioxide level. Carbon dioxide was utilized in the photosynthesis activity in the tubes containing Elodea.
Carbon dioxide is a compound consisting of molecules that are covalently double bonded to two oxygen atoms. At ambient temperature, it appears to exist as just a gas. Carbon dioxide in the atmosphere is translucent to visible to the human eye but soaks up infrared light, acting as a greenhouse gas. Photosynthesis is the process that plants as well as other microbes use to convert chemical energy into light that can then be released to power the individual's activities via cellular respiration.
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Look at the equation.
C₂H4 +302 2CO₂ + 2H₂O
If the reaction shown has 55.0 grams of ethylene (C₂H4) and excess oxygen (30₂), how many moles of carbon dioxide will be
produced?
The number of moles of the carbon dioxide is 3.92 moles.
What is the number of moles?We know that the number of the moles can be obtained by the use of the equation of the reaction that has been shown in the question as; C₂H4 +302 -------> 2CO₂ + 2H₂O.
We then have that;
Number of moles of the ethylene = 55.0 grams/28 g/mol
= 1.96 moles
If 1 mole of ethylene produces 2 moles of carbon dioxide
1.96 moles of ethylene would produce x moles of carbon dioxide
x = 1.96 * 2/1 mole
= 3.92 moles
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An apple costs $0.63. One tree produces 418 apples. The orchard has 20 trees. The apple farmer wants to trade the orange farmer 3 oranges for every 2 apples. How many oranges is he able to obtain by trading 0.64 of his orchard?
The apple farmer is able to obtain 8,034.6 oranges by trading 0.64 of his orchard.
How to determine how many oranges he is able to obtain by trading 0.64 of his orchard?
A word problem is a mathematical exercise where significant background information on the problem is presented in ordinary language rather than in mathematical notation
First, let's find the total number of apples produced by the orchard:
20 trees × 418 apples/tree = 8,360 apples
Now, let's find the number of apples that the apple farmer is able to trade: 8,360 apples × 0.64 = 5,350.4 apples
Since the apple farmer wants to trade 3 oranges for every 2 apples, he will be able to obtain:
3 oranges / 2 apples × 5,350.4 apples = 8,025.6 oranges.
Therefore, the apple farmer is able to obtain 8,025.6 oranges by trading 0.64 of his orchard.
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One of the wavelengths of light emitted by hydrogen atoms is 6.56 x 10–7 m. Calculate the frequency.
The frequency of the light emitted by hydrogen is equal to 4.57 Hz.
What are frequency and wavelength?The frequency of the wave can be defined as the number of oscillations of a wave per second. The frequency has S.I. units of s⁻¹ or Hertz.
The wavelength can be described as the distance between two adjacent crests on a wave.
The relation between frequency, wavelength, and speed of light (c) can be shown as:
c = νλ
Given, the wavelength of the light emitted by H-atom, ν = 6.56 × 10⁻⁷ m
The speed of light, [tex]c =3 \times 10^8\; m/s[/tex]
The frequency of the light emitted by hydrogen atoms can determine from the above-mentioned relationship:
ν= c/λ = 3 ×10⁸/6.56 × 10⁻⁷ = 4.57 Hz
Therefore, the frequency of the emitted light is equal to 4.57 Hz.
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rank the speed of sound in the following substances from slowest to fastest: steel 25°C air, 50°C air, and water. defend your predictions using the kinetic theory of matter.
The speed of sound in given substances from slowest to fastest: 25°C air, 50°C air, water, steel.
What are sound waves?Sound can transmit through liquids, gases, solids, and plasma as longitudinal waves, these are also known as compression waves. Sound waves need a medium to travel so they can be propagated through solids as longitudinal and transverse waves.
Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction, while transverse waves exhibit alternating shear stress perpendicular to the propagation path.
Waves can cause matter to move up and down but can not carry along with them. As the temperature of the air increases the molecules start to vibrate faster eventually the speed of the sound increase.
The speed of sound is lowest in gases, faster in water, and fastest in steel (solid).
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cluster decay is a type of radioactivity like alpha decay, except instead of spitting out a helium nucleus, it expels something bigger. what is the atom resulting from uranium-235 (u) emitting a magnesium-28 (mg) nucleus? (write your answer in the standard u-235 format.)
A radioactive atom emits a cluster of neutrons and protons-235 heavier than an alpha particle in a process known as cluster decay.
Cluster decay, also known as heavy particle radioactivity or heavy ion radioactivity, is a very uncommon form of nuclear decay in which an atomic nucleus generates a small "cluster" of neutrons and protons, more than in an alpha particle but less than a typical binary fission fragment. The cluster size is also produced by ternary fission into three fragments. When the parent nucleus loses protons, it becomes the daughter nucleus, which has an atomic number Zd = Z + Ze and a mass number Ad = A Ae, where Ae = Ne + Ze. [1] For instance
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Organisms typically have more than one form of each gene. If one form can mask the appearance of another form, that form is considered _______ the other form.
A.
better than
B.
dominant over
C.
recessive to
D.
worse than
If one form of a gene can mask the appearance of another form, that form is considered dominant over the other form. Option B.
What are dominant alleles?According to Mendel, genes are usually made up of 2 alleles. These alleles can be the same or different. When the alleles are the same, the gene is said to be homozygous. If the alleles are different, the gene is said to be heterozygous.
When the two alleles that make up a gene are different, one will be dominant and the other will be recessive. The dominant gene masks the effect of the recessive gene. In other words, the recessive gene cannot be expressed as long as it coexists with the dominant gene. In order for it to be expressed, it has to be in two copies or a homozygous recessive form.
For the dominant allele, however, only one copy is needed for it to be expressed.
In summary, if one form of a gene can mask the appearance of another form, that form is considered dominant over the other form.
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classify each of the following characteristics as related to fusion, fission, or both
Used in nuclear
power plants
Byproducts have
long half-lives
Needs very high
temperatures
Releases lots
of energy
Occurs on the sun
Fission only
Fusion only
Fission and fusion
Nuclear Fission include used in nuclear power plants and byproducts have long half-lives, Nuclear fusion includes occurs on the sun and needs very high temperatures, while Nuclear fission and Nuclear fusion includes release lots of energy.
What are Nuclear fission nuclear and Nuclear fusion?Nuclear fission is a physico chemical process caused when an atom divides into two smaller atoms, which released important amounts of energy and it is used to generate electricity in nuclear power plants.
Conversely, Nuclear fusion occurs when smaller atoms such as hydrogen fuse to form larger atoms, which is able to generate much more energy when compares to Nuclear fusion, and this process fuel energy in the sun.
Therefore, with this data, we can see that fission nuclear and fusion nuclear are very different processes in terms of the division of fusion of atoms and they release differential amounts of energy.
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allylic bromination of methylenecyclohexane would be expected to give two isomeric monobromination products. identify the other isomer. multiple choice a b c d
Two isomeric monobromination products should result from the allylic bromination of methylene cyclohexane, according to expectations. The final product will be 1-(bromomethyl)cyclohexene.
N-Bromosuccinimide, also known as NBS, is a chemical reagent utilized mostly in organic chemistry's electrophilic addition, electrophilic substitution, and radical substitution processes. It is regarded as an easy way to get bromine radicals. NBS interacts with the substance in an aqueous solution in alkenes to produce bromohydrins as the end result.
Allylic bromination is defined as the reaction employing NBS that results in the substitution of a bromine atom for hydrogens on a carbon next to a double bond.
Following drawing of the methylene cyclohexane extended structure, the reaction will be carried out using the reagent NBS.
The IUPAC name of the product is 1-(bromomethyl)cyclohexene.
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The characteristics of two different types of reactions are shown below: Reaction A: Electrons are gained by the atoms of an element. Reaction B: Protons are lost by the atom of an element. Which statement is true about the atoms of the elements that participate in the two reactions? a Their identity changes in both Reaction A and Reaction B. b Their identity changes in Reaction A but not in Reaction B. c Their identity changes in Reaction B but not in Reaction A. d Their identity remains the same in both Reaction A and Reaction B.
Answer:
C: B's identity changes, but not A's identity. The identity of an element is solely dependent on the number of protons. For example, 2 protons in an element would be Helium. But if you add or subtract protons you would get a different element like Hydrogen or Lithium. However, such a rule does not apply to electrons; adding or removing electrons would just change the charge of the element, but not the identity.
c is the correct choice
ion x has a charge of 2 , and ion y has a charge of 1-. what is the formula unit of the compound formed from the ions?
if ion x has a charge of 2 , and ion y has a charge of 1- the formula will be XY2. Positively and negatively charged ions can combine to produce compounds known as ionic compounds.
By losing electrons, positively charged ions are created. Gain of electrons results in the formation of negatively charged ions. The synthesis of ionic chemicals two negatively charged ions of Y are necessary for the creation of a neutral ionic compound when they combine with an ion X that has a charge of 2+ and an ion Y that has a charge of 1-.
The ionic substance they produce has the following chemical formula:
X²⁺ + 2Y⁻ ---> XY₂
Consequently, XY2 is the ionic compound
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