Which of the following describes the formation of an ionic bond?
Potassium (K) loses an electron and becomes positively charged. Chlorine gains an electron and becomes negatively charged. The two atoms become attracted to one another.
Potassium (K) gains an electron and becomes positively charged. Chlorine loses an electron and becomes negatively charged. The two atoms become attracted to one another.
Potassium (K) and chlorine share an electron.
The following describes the formation of an ionic bond is
Potassium (K) loses an electron and becomes positively charged. Chlorine gains an electron and becomes negatively charged.
Ionic bond forms by the transfer of valence electrons from an atom to another atom. The chlorine is electronegative atom and accept the electron while potassium atom loses an electron and then ionic attraction arises between the positively charged potassium atom and negatively charge chlorine atom and form KCl that is potassium chloride.
K⁺ + Cl⁻ -----> KCl
Thus, The following describes the formation of an ionic bond is
Potassium (K) loses an electron and becomes positively charged. Chlorine gains an electron and becomes negatively charged.
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When a solution of ammonium carbonate and magnesium chloride are mixed, what precipitate if any is formed?.
When a solution of ammonium carbonate and magnesium chloride are mixed, the precipitate formed is ammonium chloride.
What is precipitation reaction?A precipitation reaction is any reversible reaction in which a product is continuously removed by precipitation, driving the reaction in one direction.
The precipitate is a substance that separates out of a liquid solution into solid form.
According to this question, when a solution of ammonium carbonate and magnesium chloride are mixed, ammonium chloride and magnesium carbonate are formed as follows:
2(NH₄)₂CO₃ + 2MgCl₂ → 4NH₄Cl + Mg₂(CO₃)₂
Based on the chemical equation above, it can be observed that ammonium chloride will be the precipitate.
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Which drawing best represents the atomic model?
Option D represent atomic model at best.
Atomic theory is a scientific that matter consists of particles known as atoms. Atomic idea traces its origins to an historic philosophical way of life referred to as atomism. According to this idea, if one were to take a lump of depend and cut it into ever smaller portions, one might eventually reach a factor where the pieces could not be in addition reduce into anything smaller. Ancient Greek philosophers called these hypothetical final debris of matter atomos, a phrase which intended "uncut"
Through the early twentieth century, scientists had developed pretty unique and specific models for the structure of count, which led to extra rigorously-described classifications for the tiny invisible particles that make up everyday remember. An atom is now defined because the basic particle that composes a chemical detail.
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A 12-oz can of seltzer weighs 450.00 grams. How many joules of energy are released when the seltzer is cooled from 25.00 degrees Celsius to 4.000 degrees Celsius if you assume the entire mass is consumed of water?
Water has a specific heat capacity of 4.186 J/g°C, which means it takes 4.186 J (1 calorie) of energy to heat a gram by one degree. is the system's temperature change.
The energy released = 39501 J.
What is specific heat capacity ?The specific heat capacity of a material is defined as the amount of heat (J) absorbed per unit mass (kg) when its temperature rises 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).The specific heat capacity is the amount of heat or energy required to change one unit mass of a constant volume substance by one degree Celsius. Cv = Q / (T m) is the formula.Water has a specific heat capacity of 4.186 J/g°C, which means it takes 4.186 J (1 calorie) of energy to heat a gram by one degree. is the system's temperature change.The specific heat capacity of the liquid water is 4.18 J / g °c.
so
Q = mx ΔT x [tex]C_{T}[/tex].
Q = 450 x 21 x 4.18
= 39501 J.
The energy released = 39501 J.
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Earth materials that are soluble in water or react to a weak acid commonly have what type of appearance?.
How do you find the cation and anion to an element
In order to find the cation and anion of an element, the valence electron of the element needs to be determined.
Valence Electrons
The valence electron of an element is the number of electrons in the outermost shell of the atom of the element.
For example, sodium is an element with the atomic number 11. The electron configuration of sodium is 2, 8, 1.
In other words, sodium atom has a single electron in their outermost shell. Thus, the valence number of electrons in a sodium atom is 1.
In order for a sodium atom to form an ion, the valence electron needs to be donated. Thus:
[tex]Na - e^- -- > Na^+[/tex]
This means that elements form cations by donating their valence electrons. The number of electrons donated will determine the number of positive charges.
Once the valence electron is more than 4, atoms gain electrons to form ions rather than donating electrons.
For example, sulfur is an element with the atomic number 16. The electron configuration is 2,8,6. In other words, sulfur has 6 electrons in its outermost shell.
To form an ion:
[tex]S + 2e^- -- > S^2^-[/tex]
In summary, cations are formed when atoms donate electrons while anions are formed when atoms gain electrons.
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Select 3
Which of these changes are Physical changes?
1.using electrolysis to break the substance down into simpler substances.
2.burning a substance in oxygen.
3.increasing the mass of a substance.
4.cutting a substance into smaller pieces.
5.boiling a substance.
Identify the product(s) in the following reaction:
Zn+2HCl → ZnCl₂ + H₂
Answer:
ZnCl2 + H2
Zinc (II) Chloride + Hydrogen gas
Identify what kind of cell or cells Andrea and Kamar are examining. Then, describe what is happening to the cell or cells.
Cell or cells Andrea and Kamar are examining is plant cell
Cells are building blocks of the living thing
Andrea and kamar are examining is plant cell and when plant entre in cytokinesis a cell plate has form between the two daughter cell because unlike plant cell and which are squishy and they can't just pinch at the middle and separate into two daughter cells and after all organelles are distributed equally among two daughter cell and new cell wall form around cell plate separating the two daughter cells
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The example of ionic bonds and covalent bond
What is the name of n2cl4? explain how you determined the bond type and the steps you used to determine the naming convention for the compound.
The name of N₂Cl₄ is Dinitrogen Tetrachloride. the type of bond between is covalent bond. The steps use to name the compound is nomenclature.
The given compound N₂Cl₄ name is Dinitrogen Tetra chloride. In this compound , Nitrogen and Chlorine are non metals . nonmetals are electronegative elements that means they want to gain electron. according to octet rule , atom need to have 8 electrons in outermost shell and it occurs by sharing of electron or by transferring of electron.
In case of nitrogen and chlorine both are electronegative and wants to gain electron so that they will complete their octet. The atom will complete their octet by sharing of electron. Hence form covalent bond.
Two nitrogen atoms are central atom and two chlorine atom connected to each nitrogen atom forming covalent bond.
two nitrogen = Dinitrogen ( Di for two)
four chlorine = tetrachloride ( tetra for 4 )
N₂Cl₄ = Dinitrogen tetrachloride
Thus, The name of N₂Cl₄ is Dinitrogen Tetrachloride. the type of bond between is covalent bond. The steps use to name the compound is nomenclature.
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After drying an organic solution, what methods can be used to remove the drying agent from solution?.
After drying an organic solution, the method that can be used to remove the drying agent from the solution is option A. Vacuum or gravity filtration.
If the drying agent is of large particle size (as when using sodium sulfate or calcium chloride), decanting is the method of preference. An opportunity to decant is removing the liquid from the drying agent truly with the aid of drawing it off with a Pasteur pipet.
Unusual drying agents are anhydrous inorganic salts that gather waters of hydration while exposed to moist air or wet answer. For the maximum not unusual drying dealers which include sodium sulfate or magnesium sulfate, the crystals form large clumps once they take in water.
A desiccant is a hygroscopic substance that is used to induce or preserve a kingdom of dryness in its vicinity; it is the opposite of a humectant. generally encountered pre-packaged desiccants are solids that take in water.
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Disclaimer:- your question is incomplete, please see below for the complete question.
After drying an organic solution, what methods can be used to remove the drying agent from the solution?
a. Vacuum or gravity filtration.
b. A wash in a separatory
c. Decanting
d. Distillation
7. The different colors of the visible light spectrum coalesce to make white
light. What is the best synonym (similar meaning) for "coalesce?"
O Divide
O Separate
O Combine
O End up
Can someone check my answers plssss? (**)- means answer
1. The Earth only has climate change because of human activity.
True
False**
2. The Earth is currently experiencing _____.
An Ice Age**
A Carbon Cycle Age
A Thermal Phase Change
An Interglacial Age
3. TRICKY QUESTION: What in one thing that scientists DO NOT use to study climate change? Choose only ONE Answer.
Number of Living trees
Pollen in bogs/lakes
Tree Rings
Ice core samples**
4. Why were the humans able to develop agriculture at the beginning of the Holocene Period?
Woolly mammoth herds left behind large numbers of animal droppings for fertilizer.
The ice from the previous ice age melted and the climate was warmer.**
Cave Men developed metal working technology that helped them make plows.
Holocene period men were able to select cold loving plants as crops.
5. TRICKY QUESTION: Humans impact the environment and the climate on the Earth. There are daily activities that you do that can affect coral reefs in oceans far away. What should you NOT DO where you live to help protect them?
Use less energy.
Plant trees/forest.
Use more water.**
Thank you <3
1. The Earth only has climate change because human activity is TRUE.
2. The Earth is currently experiencing An Ice Age.
3. Ice core samples
4. The ice from the previous ice age melted and the climate was warmer.
5. Use more water.
Humans impact the physical environment in many ways including overpopulation pollution, burning of fossil fuels, and deforestation. Such changes are causing climate change soil erosion declining air quality and water unfit for drinking.
Pollution overfishing destructive fishing with dynamite and cyanide, collecting live corals for the aquarium market, mining corals for building materials, and climate warming are the many different things that humans do to coral reefs around the world every day. just a fraction of the damage. Climate change will lead to the Warming of the oceans causing heat stress that contributes to coral bleaching and infectious diseases.
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100 POINTS!! HELP ASAP
Answer:
Decreased amounts of carbon dioxide cause reactions to happen in the water that increase the pH and decrease the
amount of calcium carbonate
Explanation:
When carbon dioxide is absorbed by seawater, chemical reactions occur that reduce seawater pH, carbonate ion concentration, and saturation states of biologically important calcium carbonate minerals. These chemical reactions are termed "ocean acidification" or "OA" for short.
Answer: Its C I did my research and that's what makes sense to me. because increased amount of carbon dioxide decreases the PH and the amount of calcium carbonate.
What would happen if we didn't have mercury (the element)
The chemical equation below represents one of the most important reactions for life on Earth. It describes how plants (and some microorganisms) combine water, sunlight, and carbon dioxide to produce the main source of food for most living organisms, glucose. A byproduct of this reaction is the oxygen we breathe. Is this reaction balanced? You must explain your reasoning for full credit!
PLS HELP, 30 Points!
I also need to know what I need to add to the equation to balance it!
The reaction is not balanced because the number of atoms of the elements on the reactant side isn't the same or equal to that on the product side.
What is Photosynthesis?This is referred to as the process in which green plants manufacture their food in the presence of sunlight and other compounds and is why they are regarded as primary producers in the ecosystem.
The balanced equation for photosynthesis is:
6CO₂ + 6H₂O + light --> C₆H₁₂O₆ + 6O₂
In this, we can see that the number of atoms of the elements of Carbon, hydrogen and oxygen are 6, 12 and 18 which is the same on the reactant and product side which is why the equation given in the question isn't balanced.
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why was it necessary to titrate the cold solution in the ice bath, but not necessary to titrate the hot solution in the hot bath?
The solubility of the Ca(OH)2 would be greatly increased since the lower temperatures would result in a slower titration and the solution would have time to warm up.
What is titration?
When a reaction reaches neutralisation, which is sometimes signalled by a colour change, titration is the steady addition of one solution with a known concentration (referred to as a titrant) to a known volume of another solution with an unknown concentration. To be a primary or secondary standard, the so-called titrant must meet the appropriate criteria. Titration is a method for figuring out a solution's concentration in a wide sense.
One of the processes in the manufacture of silver nanoparticles involves gently combining sodium borohydride with silver nitrate in an ice bath to create yellow colloidal silver.
Since the titration would proceed more slowly at the lower temperatures and the solubility of the Ca(OH)2 would increase dramatically as the solution warmed, it was necessary to titrate the cold solution in the ice bath.
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a 100.00 ml of volume of 0.500 m hcl was mixed with 100.00 ml of 0.500 m koh in a constant pressure calorimeter. the initial temperature of individual acid and base was 23.0 oc. the final temperature after mixing was 25.5 oc. the specific heat of the solution was 3.97 j g-1 oc-1 assume the density of the solution is 1.00 g ml-1 a) calculate the heat of the reaction in kj. (be sure to use signs correctly.) b) calculate the enthalpy of the reaction in kj/mol. (be sure to use signs correctly.)
Answer: 2.018
Explanation:a 100.00 ml of volume of 0.500 m hcl was mixed with 100.00 ml of 0.500 m koh in a constant pressure calorimeter. the initial temperature of individual acid and base was 23.0 oc. the final temperature after mixing was 25.5 oc. the specific heat of the solution was 3.97 j g-1 oc-1 assume the density of the solution is 1.00 g ml-1 a)
Which of the following actions describes deposition?
breaking rock into smaller pieces
dropping sediment in one location, where it builds up
moving rock from one location to another
flowing soil or mud due to gravity
The following actions describe deposition as flowing soil or mud due to gravity. Option D.
Sedimentation is the accumulation of sediments carried by the wind running water sea or ice. Sediments are carried as pebbles sand mud, or dissolved salts in water. A deposition is the direct transition of a substance from the gaseous state to the solid state on cooling without going through the liquid state.
Sedimentation is the geological process in which sediments soils and rocks are added to form landforms or land masses. Wind ice water and gravity cause previously weathered surface material to deposit and lose sufficient kinetic energy within the fluid to form a layer of sediment. Several factors influence how sediment settles. Sediment is removed from new surface locations. Precipitation is the change of state of a gaseous substance into a solid.
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Energy 2:Question 9
A box falls from a high shelf. If the box reaches a velocity of 7.6 m/s
just before it hits the ground, how high is the shelf?
A box falls from a high shelf. If the box reaches a velocity of 7.6 m/s
just before it hits the ground, the height of the shelf is 2.9 m.
given that :
velocity = 7.6 m/s
the expression for the velocity of an object falls from height
v² = 2 g h
g is acceleration due to gravity
h is the height
v is velocity of box
substituting the values in formula , we get :
v² = 2 g h
(7.6)² = 2 × 9.8 × h
h = 57.76 / 19.6
h = 2.9 m
the height is 2.9 m.
Thus, A box falls from a high shelf. If the box reaches a velocity of 7.6 m/s. just before it hits the ground, the height of the shelf is 2.9 m.
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A metal tank containing hydrogen gas has a pressure gauge that reads 575 psi . What is causing the pressure inside of the tank ?
Answer:
The hydrogen molecules colliding with the sides of the metal tank.
Explanation:
Gas pressure is caused by the force exerted by gas molecules when colliding with the surfaces of objects.
mention a metal which forms insoluble trioxocarbonate[vi] which decomposes to form an oxide of the metal
Aluminum is a metal which forms insoluble trioxocarbonate[vi] which decomposes to form an oxide of the metal.
What are metals?A metal is described as a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically ductile and malleable.
The properties a metal displays is as the result of the metallic bond between the atoms or molecules of the metal.
The properties of metals include the following:
A metal is mostly a hard solid substance that has a shiny luster and conducts heat and electricity. Metals are also good conductors of heat and electricity.Metals also possess malleability, that is they can be hammered into sheets.Learn more about metals at: https://brainly.com/question/89259
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a chemical combination of two or more elements joined together in a fixed proportion
Answer: a compound!
Explanation: a compound is something that contains two or more elements that are chemically combined in a fixed proportion!
4. Conclude Coach Reuter puts you in charge of making sure the soccer
balls are at the right pressure for the big away game tomorrow. She thinks
checking them now might save you some time in the morning. Make a
recommendation about when you would check the pressure. Explain your
reasoning.
The right way to check the pressure of the soccer balls is via an air pressure gauge.
What is an air pressure gauge?
A device used to gauge the pressure that air or other comparable gases exert is known as an air pressure gauge.
As per the question, the air pressure gauge is based on Hook’s law. Hook’s law which states that the force needed to expand or compress a spring scales linearly concerning the distance of extension or compression, serves as the foundation for the operation of pressure gauges. Both internal and external pressure exists.
Consequently, when pressure is applied to an object's surface and the pressure is measured in this way.
Hence, the air pressure gauge is used.
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Perform the following operation
and express the answer in
scientific notation.
(7.296 × 10²) = (3.6 × 10-⁹)
[?]
? ] × 10°
After perform the following operation and express the answer in scientific notation is 7.6×10¹⁰
What is scientific notation?
Scientific notation is a way to present extremely large or extremely small numbers in a more understandable way. We are aware that full numbers can go on forever, but we are unable to write such enormous figures on paper. Additionally, a simpler method of representation was required for the numbers that appear at the millions place after the decimal. This makes it challenging to represent a small number of integers in their enlarged form. We therefore employ scientific notations. Learn general form for numbers as well. In scientific notation, 100000000 can be written as 108, for instance. Exponent is positive in this case. Similar to 0.0000001, which has a negative exponent and is a very small number, 10-8 can be used to symbolise it.
=7.296×10²÷9.6×10⁻⁹
=7.296×10²/9.6×10⁻⁹
=0.76×10¹¹
=7.6×10¹⁰
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Which option describes a benefit of rotating crops?
Responses
maintains nutrient levels in soil
helps irrigate the crops
prevents weed from growing in the crops
makes the soil more organic
Crop rotation is the technique of planting crops in a different area of the garden so that no single crop will be planted in the same place two—or more—years in a row.
Crop rotation aids in preserving the structure and nutrient content of the soil as well as helping to keep pests that are carried by the soil from colonizing the garden.
As the same nutrients are repeatedly consumed when a single crop is planted in the same location each year, the soil structure slowly deteriorates. After a while, the soil loses those particular nutrients and becomes unhealthy. At the same time, insect pests that feed on a single crop and spend their larval stage in the soil multiply as long as their food supply is still present. As their number grows, these pests get harder to control every year.
There are four key benefits of crop rotation: (1) Plants that fix nitrogen, like legumes and peas, enhance the quality of the soil for subsequent vegetable plantings in the same bed. (2) Plants with shallow and deep roots alternately extracted nutrients from the soil at various depths. (3) Because their food source is not in the same place each year, soilborne pests that feed on a particular plant family are inhibited. (4) Farmers and gardeners that use crop rotation don't have to leave their fields or beds fallow as frequently as they might otherwise.
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Milk has a pH of about 6.7 is milk acidic or basic use figure 8-3 to answer this question
O Acidic
O Basic
O Neutral
Explanation:
Hi, I think the answer's C- neutral cuz 6.7 is approximately 7, and seven is neutral so....
C
hope this helps
Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after the heating. Is the sample of red crystals an element or a compound? Explain your answer.
The sample of red crystals is a compound as the elements cannot be broken down further by physical or chemical change.
What is a compound ?Compound is defined as a chemical substance which is made up of identical molecules containing atoms from more than one type of chemical element.
Molecules which consists of atoms of only one element are not called compounds.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding which are present in them.They are:
1)Molecular compounds where in the atoms are joined by covalent bonds.
2) ionic compounds where in the atoms are joined by ionic bond.
3)Inter-metallic compounds where in the atoms are held by metallic bonds
4) co-ordination complexes where in the atoms are held by co-ordinate bonds.
They have a unique chemical structure which is held together by chemical bonds. Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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Answer:
Elements cannot be broken down into simpler substances.
Compounds can be broken down into simpler substances.
Explanation:
While reading through a strange textbook on alien currency, you encounter the following word problem:
You are on an alien planet where the names for substances and the units of measures are very unfamiliar.
Nonetheless, you obtain 13 quibs of a substance called skvarnick.
You can trade this skvarnick for gold coins, but the vendors all measure skvarnick in units of sleps; not quibs.
5 quibs is equal to 7 sleps.
If you have 13 quibs of skvarnick, how many sleps do you have?
Based on the word problem above, what conversion factor are you given?
Question 3 options:
A.quibs
B.5 quibs = 7 sleps
C.7 sleps
D.13 quibs
E.5 quibs
F.sleps
Number of sleps we have is 7 sleps. Option B.
A conversion factor is a number used to convert one set of units to another set by multiplication or division. If the conversion is required, the values should be equal using the appropriate conversion factor. For example, when converting inches to feet, the equivalent conversion value is 12 inches or 1 foot.
The conversion factor is a fraction equal to multiplying a quantity by a conversion factor that changes the units in which the quantity is measured but does not change the original quantity of the quantity. The conversion factor is equal to 1 because it consists of an equal sign. To find the conversion factor using squares square on both sides of the conversion factor. To find the transforming factor that includes the dice cube on both sides of the transforming factor.
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