Answer:
5. F
6. H
7. E
8. B
9. G
10. D
Explanation:
Most of these could have just been looked up online or could've used context clues based on the name. If they are vocab words make sure to memorize them.
please explain why and reason
Answer:
I think the right answer was "because they have already formed bonds to become more stable"
Explanation:
the reason you got the question wrong was because not all unstable elements have to be bonded with a gas molecule. It could be a metal for example.
it's hard to find these unstable elements in natural nature because since they are so unstable, they can't "wait" so they form bonds as soon as they can when they get the chance.
nature isn't controlled by scientists too, so these unstable elements form bonds with almost anything possible when they have the chance to become more stable
Can someone help me with level 17 of Covalent Bonds o the Collision app? This is the last one and it's urgent.
The covalent compounds formed from the given elements are as follows:
Water; H₂OCarbo (iv) oxide; CO₂, and Nitrogen trifluoride; NF₃What are covalent compounds?Covalent compounds are compounds that are formed as a result of covalent bonds formed between atoms of different elements.
Covalent bonds are formed as a result of sharing of electrons between atoms of different elements usually non-metals.
Due to differences between the electronegativities of atoms of nom-metals, the electrons shared in covalent compounds are not always shared equally. Thus, several other intermolecular forces exist between molecules of covalent compounds.
Some of the intermolecular forces that exist in covalent compounds include:
London Dispersion forcesDipole Dipole forcesHydrogen bondingGiven the following elements: nitrogen, fluorine, oxygen, carbon, and hydrogen.
The covalent compounds that can be formed representing the given intermolecular forces are as follows:
Water; H₂O - hydrogen bonding exists between water moleculesCarbo (iv) oxide; CO₂ - London dispersion forces are the major intermolecular forces present in carbo (iv) oxide given moleculesNitrogen trifluoride; NF₃ - dipole dipole forces predominate in nitrogen trifluoride molecules.
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The preparation of isopentyl acetate by the method used in this experiment is an equilibrium reaction. Equilibrium must be shifted to the right-hand side because the reaction does not favor formation of the product. What method is used to accomplish this?.
The Fischer Esterification method is used to accomplish this preparation of isopentyl acetate.
The Fischer esterification is an alternative esterification mechanism that uses an equilibrium process. It is standard procedure to use an excess of one of the reactants, often alcohol or acid, to alter the equilibrium in a way that facilitates the synthesis of esters. Since acetic acid is less costly and more readily removed than alcohol, we will use a lot of it in the current procedure.
Another strategy to trigger a reaction to its products is to remove one of the products as it forms. In this experiment, we will completely remove the water produced in the reaction by directly adding silica beads to the reaction vessel and using a drying tube with a drying agent (calcium chloride), which forbids the entrance of moisture into the reaction.
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From the list below, which item is not part of beta decay?
OA. The nucleus of the atom is unstable.
B. An atom has many more electrons than protons.
C. A neutron turns into a proton.
D. An electron is ejected from the nucleus
Answer:
C
Explanation:
When Beta decay happens, the atomic number of an element goes up, and that means there is an extra proton. A is not the answer because unstable atoms cause decay. B is also not correct because this is what happens in Beta decay: a neutron becomes a proton. D is not correct because an electron is actually emitted from the nucleus.
Answer:
The correct answer is B. An atom has many fewer protons than neutrons.
I just took the test.
Explanation:
A 1.0 m solution of HC1 in benzene has a freezing point of 0.4 °C. Is HC1 an electrolyte in benzene? Explain.
Based on the freezing point depression value of HCl in benzene, HCl does not act as an electrolyte in benzene.
What is the effect of solute on the freezing point of a solvent?The freezing point of a solvent such as water is lowered by the solute which ionizes in it.
The freezing point of a solution depends on the number of particles in the solution.
The formula for freezing point depression is given below:
ΔTf = i * Kf * m
HCl remains as molecules and does not ionize in a solution of Benzene. This is because benzene is a nonpolar solvent.
Therefore, the equation for the dissolution of HCl in benzene is given below:
HCl (g) → HCl (in benzene solution)
1 mol of HCl gas gives 1 mol of HCl molecules in solution.
Therefore, HCl remains a molecule and does not act as an electrolyte in benzene.
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abel each reactant and product in this reaction as a brønsted acid or base. you are currently in a labeling module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. ch3oh oh−↽−−⇀ch3o− h2o answer bank
Identify each ingredient and output of this reaction as an acid or a basic. Right now, you're in a labeling module. switch off the quick navigation or explore mode, tab to the details, press space or enter to pick up, tab to move, and press space or enter to drop.
ch₃oh o − ↽ − − ⇀ ch₃o − h₂o answer bank.
Acid and Base
A chemical reaction between an acid and a base is known as an acid-base response. It can be applied to calculate pH. These are known as the acid-base propositions, such as the Brnsted-Lowry acid-base statement, and they are essential generalizations of the response mechanisms and how they function when solving related problems.
Their importance is revealed when testing acid-base reactions for gaseous or liquid species, or when the acid or basic property may be less obvious. Antoine Lavoisier, a French pharmacist, gave the first of these generalizations somewhere around 1776.
It's important to suppose of the acid- base response models as propositions that round each other. For illustration, the current Lewis model has the broadest description of what an acid and base are, with the Brønsted- Lowry proposition being a subset of what acids and bases are, and the Arrhenius proposition being the most restrictive.
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Organisms in overpopulated areas do not survive well due to what
Organisms in over-populated areas do not survive well due to reduction in available food and shelter.
An unsustainable population within a specific area or habitat is referred to as overpopulation. A higher birth rate, a lower death rate, migration to an area of the ecosphere where there are fewer predators, or a rapid fall in the amount of resources available are all causes of overpopulation. Overpopulation thus refers to a situation when a population in a particular ecosystem depletes the resources necessary for subsistence or survival.
Overpopulation typically causes ecological disruption due to resource depletion. Other populations who compete for the same resources may experience a decline as a result of this disruption.
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the chemical formula for an ionic compound represents the group of answer choices number of ions in each molecule. total number of ions in the crystal lattice. number of atoms in each molecule. ratio of the combined ions present in a sample.
The chemical formula for an ionic compound represents the ratio of the combined ions present in a sample.
A sample of an ionic compound doesn't represent a multiple of distinct molecules, like a sample of a covalent compound, where the chemical formula does represent the number of atoms in a single, differentiated molecule. Ionic compounds form crystal lattices where each positively charged cation is surrounded by negatively charged anions and vice versa. Thus, the chemical formula of an ionic compound merely describes the ratio of cations and anions present in the crystal lattice.
The total number of ions in the lattice can, on the other hand, be calculated using the mass of the sample and Avogadro's number.
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Marcie fills a graduated cylinder with 15.0 mL of water (Vi). Paul finds the mass of a marble to be 2.21g, then drops the marble into the graduated cylinder. If the meniscus on the graduated cylinder is now at 16.3 mL (Vf), what is the density of the marble?
The density of the marble is 1.7kg/m³
Density is the amount of mass per unit of volume
Marcie fills a graduated cylinder with 15.0 mL of water (Vi) paul finds the mass of a marble to be 2.21g, then drops the marble into the graduated cylinder if the meniscus on the graduated cylinder is now at 16.3 mL (Vf)
We have to find density of the marble = ?
Volume = (Vi) - (Vf) = 15.0 mL - 16.3 mL
Volume = 1.3mL
Mass = 2.21g
Density = mass/volume means ρ = m/V
Density = 2.21g / 1.3mL
Density = 1.7kg/m³
The density of the marble is 1.7kg/m³
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What rule can you state about the relationship between phase changes and heat energy?
The terms change of phase and change of state are synonymous. A change in phase is always accompanied by a change in heat. However, the temperature remains constant. When we heat a solid, the energy supplied is used to increase the kinetic energy of its molecules, resulting in an increase in temperature.
What happens to energy when the phases change?A system undergoing a phase change absorbs or releases energy. Energy changes are equal in magnitude but opposite in sign for systems undergoing complementary phase changes. The heat energy added during the phase change overcomes some of the forces that hold the molecules together, allowing them to move further apart. The added heat energy is stored as potential energy, or energy of position, during the phase change because the molecules are now further apart. A change in phase is always accompanied by a change in heat. However, the temperature remains constant. When we heat a solid, the energy supplied is used to increase the kinetic energy of its molecules, resulting in an increase in temperature.To learn more about phase changes, refer to:
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if 100 mg of ferrocene is reacted with 75 mg of anhydrous aluminum chloride and 40 microliters of acetyl chloride and 100 mg of product is isolated, what is the percent yield assuming the product is only mono acetylferrocene? answer with just the number and no % sign.
Fe(C 5H 5) 2 describes the organometallic compound ferrocene. The molecule is a complex made up of a core iron atom and two cyclopentadienyl rings.
AlCl3 is the chemical formula for aluminum chloride, sometimes referred to as aluminum trichloride.
Acetic acid is the source of the acyl chloride known as acetyl chloride. AcCl is a frequent way to shorten its formula.
"81.3%"
One mole of ferrocene combines with one mole of acetyl chloride in accordance with the reaction's stoichiometry to produce one mole of mono acetylferrocene.
The limiting reagent is the one that is minimally present. Ferrocene is the limiting agent as a result.
The limiting reagent controls how the product is formed. So,
In a reaction, one mole of ferrocene yields one mole of mono acetylferrocene.
reaction forms with 0.0005375 moles of ferrocene Mono acetylferrocene, 0.0005375 mole
0.0005375 moles of product were produced.
Mono acetylferrocene's molar mass is 228.07 g/mole.
Produced mono acetylferrocene mass equals moles times molecular weight, or 0.0005375 x 228.07 g, or 0.123 grammes, or 123 mg.
assuming a 100 mg experimental yield
% yield is equal to (Experimental Yield / Theoretical Yield) / 100, which equals (100/ 123) / 100, or 81.3%.
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Answer the following questions using the information from these videos. Be sure to use complete sentences.
1) What are the suspects accused of doing?
2) Describe how the suspects used the zinc metal and the zinc chloride solution to change the copper coins to silver.
(Hint: Additive or Displacement plating?)
3) How did the suspects make the silver coins look gold?
Based on the electroplating process video:
The suspects were accused of producing fake gold coins.The suspects used the zinc metal and the zinc chloride solution to change the copper coins to silver by additive plating.The suspects made the silver coins look gold by holding it over a roaring bunsen flame.What is electroplating?Electroplating is the process by which a metal is used to coat the surface of another substance.
The process of electroplating is done in order to improve the quality of the material being coated as well as to make it more durable.
In the video, the copper coins were plated with zinc by dipping the coins into a solution of sodium zincate.
The sodium zincate is prepared by dissolving powdered zinc in a sodium hydroxide solution.
The undissolved zinc powder in the solution will form a fine film of zinc over the copper making it looks shiny like zinc.
The zinc-coated coin is then held over a bunsen flame until it turns shiny gold.
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(ii) In this lattice, the ratio of positive ions to negative ions is 1:1
In the lattice of a different ionic compound, the ratio of positive ions to
negative ions is 1:2.
Suggest why this ratio varies in different ionic compounds.
The ratio varies in different ionic compounds because different ionic compounds have different ratios of positive ions to negative ions.
How do lattices function?An ordered grid of points known as a lattice is used to visualize how crystallizing particles are structured. The unit cell of the crystal is defined by the lattice points. The smallest part of a crystal, known as a unit cell, is repeatedly translated in three dimensions to create the whole crystal.
The crystal structure (or crystal lattice) of an ionic compound is determined by the size of the ions and the stoichiometry (ratio of cations to anions) of the ions. Many ionic compounds have variations in this ratio.
A recurring three-dimensional pattern of atoms or groups of atoms in a crystal is known as a crystal lattice structure.
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examine the following equation: 23490th→23491pa 0−1e γ90234th→91234pa −10e γ which type(s) of radiation are produced in this reaction? responses beta and gamma beta and gamma, , alpha and beta alpha and beta, , beta beta gamma gamma alpha alpha alpha and gamma alpha and gamma, ,
Radiation produced in the given reaction is beta and gamma.
Describe radiation.
Radiation is defined as a source of energy or particles that pass through the atmosphere or other media. Radiation includes microwaves and radio waves utilized for wireless communication as well as light and heat. The term "radiation" refers to energetic particles and electromagnetic waves that some materials emit.
How does gamma radiation work?A stream of extremely energetic electromagnetic radiation known as gamma rays or gamma radiation is released by an atomic nucleus that is going through radioactive decay.
What kind of radiation is beta radiation?Beta Radiation Free electrons or positrons moving at relativistic speeds make up beta radiation. The term "beta particles" refers to these entities. Beta particles are high-energy, high-speed electrons or positrons released by some fission fragments or by some primitive radioactive nuclei, such as potassium-40.
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A block of steel occupies a volume of 15.0 mL and weighs 120.75 g. What is its density?
The density of a block of steel is:
8.05g/mL.
The mass of a substance per unit of volume is that the definition of density. though the sign may represent the Latin letter D, it's most often accustomed represent density. Mass divided by volume is however density is mathematically outlined.
The units of mass divided by volume accustomed live density embody grammes per cm cube (g/cm3) and kilogrammes per liter .
The equation for density is d = M/V, wherever d represents density, M is mass, and V is volume.
As a result, so as to calculate density, we tend to should divide mass by volume.
The mass is one hundred 20.75 and therefore the volume is 15.0 ml.
Divided by 120.75/15.0
8.05g/mL is the density.
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During the determination of molar mass of co2 experiment, suppose you measure the atmospheric pressure of the lab as 752 torr and the temperature of the lab as 21°c. If the vapor pressure of water is 18. 65 torr at 21°c, what is the pressure, in atm, of the co2 collected?.
The pressure (in atm) of the carbon (IV) oxide, CO₂ gas collected, during the given experiment is 0.965 atm
How to determine the Pressure (in atm) of CO₂We'll beging by obtaining the pressure (in torr) of the carbon (IV) oxide, CO₂ gas collected. This can be obtained as follow:
Pressure of lab = 752 torrVapour pressure of water at 21 ° C = 18.65 torrPressure of CO₂ = ?Pressure of CO₂ = (Pressure of lab) - (Vapour pressure of water at 21 ° C)
Pressure of CO₂ = 752 - 18.65
Pressure of CO₂ = 733.35 torr
Finally, we shall convert 733.35 torr to atm as illustrated below
We know that:
760 torr is equivalent to 1 atm
Therefore,
733.35 torr will be equivalent = (733.35 torr × 1 atm) / 760 torr
733.35 torr = 0.965 atm
Thus, from the above calculations, we can conclude that the pressure (in atm) is 0.965 atm
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During the determination of molar mass of co2 experiment, suppose you measure the atmospheric pressure of the lab as 752 torr and the temperature of the lab as 21°c. If the vapor pressure of water is 18. 65 torr at 21°c, what is the pressure, in atm, of the co2 collected?.
The pressure of the CO₂ collected in atm is 0.965 atm.
We need to know about pressure to solve this problem. Pressure is unit that describe how much force applied on a surface area. It can be determined as
P = F / A
where P is pressure, F is force and A is area.
From the question above, we know that
Pvapor = 18.65 torr
P = 752 torr
From partial pressure, we can conclude that
P = Pco₂ + P vapor
752 = Pco₂ + 18.65
Pco₂ = 752 - 18.65
Pco₂ = 733.35 torr
Convert to atm
Pco₂ = 733.35 torr
Pco₂ = 733.35/760 atm
Pco₂ = 0.965 atm
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How is the protein in the milk useful for the animal that produces the milk?
All nine of the necessary amino acids that humans need are present in milk proteins.
Although the mammary gland produces the proteins in milk, 60% of the amino acids needed to make those proteins come from the cow's diet. So the milk from cows may also provide us with protein.
Why are dairy cows dependent on protein?The dairy cow needs proteins for a variety of metabolic processes, including growth, lactation, and reproduction. The dairy cow needs proteins for a variety of metabolic processes, including growth, lactation, and reproduction. Crude protein is a popular term used to describe the protein content in feed (CP).
All elements of bodily health, reproduction, and most critically milk production in the dairy business depend on protein. The protein that the cow consumes may be divided into two types: rumen degradable protein (RDP) and rumen undegradable protein (RUP).
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4. Which of the following organic molecules are isomers?
A. CH3CH₂CH₂CH3
B. CH3CHCH3
|
. CH3
CH3
|
C. CH3-C-CH3
|
CH3
D. CH3CH=CH₂
CH3
|
E. CH-C- CH3
|
CH3
F. CH3\
C=CH
CH3/
G. CH₂ - CH₂
| |
CH₂ - CH₂
The following organic molecules are isomers CH3CH₂CH₂CH3. Option A.
All organic compounds have isomers. Isomers mean that they have the same molecular formula but different configurations. The connectivity of a connection ultimately determines its functionality. For example, the same molecular formula can be used to identify alcohols or ethers.
Isomers are molecules that have the same molecular formula but differ in the arrangement of their atoms in space. This excludes all other configurations by rotating the molecule as a whole or around specific bonds. In organic chemistry, isomers are molecules that have the same molecular formula but differ in the structural or spatial arrangement of the atoms within the molecule.
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A researcher grew a plant in an illuminated chamber with 18o-radiolabeled co2. After allowing time for photosynthesis, where will the radiolabeled 18o be found?.
After allowing time for photosynthesis the ¹⁸O-radiolabeled will be found in the plants in the form of C₆H₁₂O₆.
A researcher grew a plant in an illuminated chamber with ¹⁸O-radiolabeled CO₂. After allowing the time for photosynthesis, the ¹⁸O-radiolabeled will be found in C₆H₁₂O₆ in the plant.
Photosynthesis is a process in which plants produces their food by using sunlight, carbon dioxide and water to produce their food with the help of the a green colored pigment called chlorophyll.
It does not matter which isotope of oxygen we are using for photosynthesis, the amount of the food produced will be more or less same in case of every isotope.
The oxygen isotope will get mixed in the soil of the plants and after the whole photosynthesis process is done. the oxygen is constituted in the plant as C₆H₁₂O₆ will would be further broken down into the form of o₂ and H₂O. These H₂O and O₂ will be released in the atmosphere as a final product of the complete photosynthesis.
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Is milk going sour caused by heating
Answer:
Both are chemical changes and both are physical changes.
Explanation:
Milk can go sour in the fridge and I don't really know about the conserve mass one.
Explain covalent bond?
Ostriches are mostly active during the day, so they should be classified as__________.
A)
crepuscular
B)
perennial
C)
diurnal
D)
nocturnal
E)
biurnal
Answer:
C
Explanation:
ostriches are classified as diurnal
Answer: The answer is diurnal!
Explanation: Nocturnal animals, such as the owl or bat, stay awake during the night and sleep during the day! Which for diurnal animals, they sleep during the night, and roam around during the day! Such as us humans are both because some people may work during the night and sleep during the day! The most common for humans is us sleeping at night though and awake during the day!
FeSO4(aq) + K3PO4 (aq) —>
K2CO3 (aq) + CdI2 (aq) —>
CaCo3 (aq) + HNO3 (aq) —>
An ionic equation is a chemical equation in which the electrolytes in aqueous solution are described as dissociated ions.
What is the difference between ionic equation and net ionic equation?A complete ionic equation also contains the spectator ions, whereas a net ionic equation just displays the chemical species that are involved in a reaction.A molecular formula has two or more atoms bonded together, whereas a chemical formula can only refer to one atom. They are both elements, and their chemical symbols are unchanged.An ionic equation is a chemical equation in which the electrolytes in aqueous solution are described as dissociated ions. It is similar to a molecular equation in that it expresses compounds as molecules.3FeSO4(aq) + 2K3PO4(aq) = Fe3(PO4)2(s) + 3K2SO4(aq)
ionic equation : 3Fe(2+)(aq) + 3SO4(2-)(aq)+ 6Na(+)(aq) + 2PO4 (3-) (aq) → Fe3(PO4)2(s)+ 6Na(+) + 3SO4(2-)(aq)
net ionic equation: 3Fe(2+)(aq) + 2PO4 (3-)(aq) → Fe3(PO4)2(s)
K2CO3(aq) + CdI2(aq) = 2KI(aq) + CdCO3(s)
net ionic equation for K2CO3(aq) + CdI2(aq) = 2KI(aq) + CdCO3(s).
2HNO3 + CaCO3 = Ca(NO3)2 + H2O + CO2
ionic equation : CaCO3(s) + 2H+(aq) → Ca2+(aq) + CO2(g) + H2O()
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the atmospheric concentration of carbon dioxide increased from 278 ppm in 1790 to 383 ppm in 2007. what is the approximate percent increase in carbon dioxide concentration from 1790 to 2007?
The approximate percent increase in carbon dioxide concentration =38%
How do we measure the CO2 content of the atmosphere?For this reason, researchers regularly take air samples at several distant locations across the globe, including one atop the Hawaiian volcano Mauna Loa, to gauge the average concentration of CO2 in the atmosphere. Since the 1950s, this website has monitored the atmospheric concentration of carbon dioxide.
Percentage increase = (Increase/original value)×100
P.I.C= (ΔC/C₁)×100 ⇒ Equation 1
Where P.I.C = Percentage increase in the concentration of carbon dioxide from 1790 to 2007,
ΔC = increase in the concentration of carbon dioxide from 1790 to 2007,
C₁ = concentration of carbon dioxide in 1790.
But,
ΔC = C₂ - C₁ ⇒Equation 2
Substituting equation 2 into equation 1.
P.I.C = [(C₂ - C₁)/C₁]×100⇒Equation 2
Given: C₁ = 278 ppm, C₂ = 383 ppm
Substituting into equation 2
P.I.C = [(383-278)/278]×100
P.I.C = (105/278)×100
P.I.C = 37.77%
P.I.C ≈ 38%
The approximate percent increase in carbon dioxide concentration =38%
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HELP WILL GIVE BRAINLIST
A student measures the density of a piece of plastic to be 0.90 g/ml. However, the accepted value for the density of that type of plastic is 1.1 g/ml. What is the percent error in her measurements?
Answer: The density of a substances is generally known as mass per unit volume. And The SI unit is Kg/m3. Mass Versus Weight: Always there is confusion in people between mass and weight. Actually, the mass of an object is referred to its weight. In the scientific concepts mass refers loosely to the amount of matter in an object.
Explanation:
why would the secondary consumer decrease and the producer increase if the grasshopper was removed
Answer:
Explanation:
The grass hopper feeds on the plants so the secondary consumer lacking its food source would decrease as the producer increases with not predator.
4. List the basic tenants of the Kinetic Molecular Theory.
Answer:
The five main postulates of the KMT are as follows: (1) the particles in a gas are in constant, random motion, (2) the combined volume of the particles is negligible, (3) the particles exert no forces on one another, (4) any collisions between the particles are completely elastic, and (5) the average kinetic energy of ...
Explanation:
get the average atomic mass of Candium from two other groups. What are at least 2 reasons why the average atomic mass of your Candium element that you calculated may not match the average atomic mass of any other lab?
The average atomic mass of your cadmium element is the mass and random errors in the measurement of mass and differences that arise from the nature of samples used for the experiment
The average atomic mass is the mass of the element that is obtained when you consider the masses of all the isotopes that are found in the element as well as the percentage abundance of each of the isotopes and the isotope percentages in each of the samples would not be the same and this means that the results that each group would obtain would slightly differ from each other
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what happens when an electric current is passed through a solution of an ionic compound
Whenever ionic chemicals are melted or dissolved in water, an electric current is produced. The B ions migrate toward the positive electrode in an ionic solution, while the A+ ions migrate toward the negative electrode.
Always dissociated, which means they are made up of independent cations (+) and anions, which are ionic compounds or salts (-). For instance, even in the solid state, there are just Na+ and Cl- ions in common salt, NaCl, and nothing that is "NaCl."
But the ions need to travel in order to conduct electricity. In the solid state, it is impossible to do this. Therefore, dry solid salts with no moisture at all are poor electrical conductors. The ions may travel, thus when they are in liquid form (melted) or solution (dissolved in water), they conduct electricity.
In other words, they conduct electricity because they are dissociated, not because electrical current is flowing through them.
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