MgCl₂ in the reaction forms a precipitate.
What is precipitation reaction?The chemical reaction in which two ionic bond combine to form an insoluble salt in a aqueous solution is called precipitation reaction. The formation of a precipitate, an insoluble ionic solid, which is the result of precipitation processes, occurs when cations and anions in an aqueous solution interact. The solubility principles for typical ionic solids can be used to assess if such a reaction happens. MgCl₂ produced as a product in the reaction forms precipitate because it is solid in nature and it is an insoluble salt and not dissolve in solution and forms precipitate on the bottom surface of the solution. Thus, MgCl₂ product in the reaction forms a precipitate.
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Answer:
PbSO4
Explanation:
just took it
How did the Quantum Mechanical Model of the atom advance the Bohr's Model of the atom? Discuss how it added
to the Bohr Model and brought the Quantum Mechanical Model to be our current model of the atom.
Answer:
The Quantum Mechanical Model suggested that electrons do not move in fixed shells as the Bohr Model suggested, but rather acted as a cloud of electrons with orbitals electrons can most commonly be found in.
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
a 1.000 g sample of decane, c10h22 is ignited inside a bomb calorimeter. the temperature rises from 20.0 deg c to 78.8 deg c. given that the heat capacity of the calorimeter is 810.0 j/c, what is the internal energy, du, of the reaction in kj/mol?
-6.78x[tex]10^{3}[/tex] kj /mol is the correct answer
What is the internal energy?
Rising temperature and changes in state or phase from solid to liquid and liquid to gas cause a rise in internal energy. Planetary bodies can be viewed as a fusion of heat engines and heat reservoirs
Internal drive U is the sum of the kinetic energy brought about by the motion of molecules and the potential energy brought about by the vibrational motion and electric energy of atoms. The energy contained in every chemical link is often referred to as internal energy. From a microscopic perspective, the internal energy can take on a variety of shapes. For any substance or chemical attraction between molecules.
Mol of decane = mass/ molar mass
= 1/142.29
1/142.29 mol gives internal energy =810.1 x58.8
So1 mol gives 810.1 x58.8x1/142.29 internal energy
so internal energy changes = 810.1 x58.8x1/142.29
-6.78x[tex]10^{3}[/tex] kj /mol
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An engineer pours hot, liquid metal into a mold. As it cools, it takes the form of a solid beam.
In the process described above, what is the evidence that a physical change occurred?
I. The liquid metal cooled to form a solid.
II. The shape of the metal changed.
III. The metal changed into new substances.
A.
I and II only
B.
III only
C.
II only
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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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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A mixture of lemon juice,bromothymol blue indicator, and indigo carmine indicators is prepared.what is the colour of this mixture ? A) yellow B) blue C) colourless D) green
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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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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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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The example of ionic bonds and covalent bond
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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65.0 ml of 0.250 m licl is added to a 1.000 l volumetric flask and the flask is filled with water. calculate the [li⁺] concentration in the diluted solution.
The concentration of Li⁺, [Li⁺] in the diluted solution is 0.01625 M.
What is the concentration of the diluted solution?The concentration of a solution is the amount of the solute dissolves in a given volume of the solvent or solution.
The concentration of a solution can be diluted.
The concentration of a solution after dilution can be calculated as follows;
C₁V₁ = C₂V₂
The given data is as follows:
C₁ = 0.25 M
V₁ = 65.0 mL
C₂ = ?
V₂ = 1.00L or 1000 mL
The new concentration will be:
C₂ = C₁V₁ / V₂
C₂ = 0.25 * 65 / 1000
C₂ = 0.01625 M
1 mole LiCl produces 1 mole Li⁺
Concentration of Li⁺ = 0.01625 M
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Please help me with this
The chloroplasts of the plant is the point where carbon dioxide does react with water and the products are sugars and oxygen.
How does the plant cell produce oxygen?We know that the plant obtains its energy form the sun. The sun is called the primary producer in the eco system. This is because the energy from the sun is trapped by the chloroplast of the plants.
Let us note that the chloroplast contains the chlorophyll which is the colored pigment that absorbs the light from the sun. This light that is absorbed from the sun acts a catalyst in a complex reaction in which the carbon dioxide combines with water to form sugars and oxygen.
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Earth materials that are soluble in water or react to a weak acid commonly have what type of appearance?.
what evidence is there that joule had a exceptional education
Evidence is there that joule had a exceptional education are :
Joule was educated at home with private tutors. When he was child , his father hired leading scientist as the great scientist john Dalton to be his teacher. when he was young he had taken brewery and missed out university. other than this joule had exceptional education. They were taught chemistry , physics the scientific method. he study to continue in home based laboratory. in this laboratory he performed experiments before and after work. Joule gave relationship between heat , electricity and mechanical work but it was widely ignored but later on Thomson recognized joule's work .
Thus, Joule had a exceptional education .
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1- Investigate:
what is/are the food?
Answer:
Food , substance consisting essentially of protein, carbohydrate, fat, and other nutrients used in the body of an organism to sustain growth and vital processes and to furnish energy.
consider the following data for scandium: atomic mass electronegativity electron affinity ionization energy heat of fusion you may find additional useful data in the aleks data tab.
Scandium: atomic mass electronegativity electron affinity ionization energy heat of fusion atomic mass of scandium is 44.95 u and electronegativity of scandium is 1.36 and electron affinity of scandium is 18.1kJmol⁻¹ and ionization energy of scandium 631kJ and heat of fusion of scandium is 14.1kJ/mol
Scandium is an element with the atomic number 21 and represented by symbol Sc in the periodic table and scandium is mined from one of the rare minerals from Scandinavia and the color it develops when exposed to air is yellowish or pinkish cast
Atomic mass : atomic mass is the quantity of matter contained in the atom of element and is the mass of single chemical element and atomic mass of scandium is 44.95 uElectronegativity : is the chemical property that describe the tendency of an atom or a functional group to attract electrons toward itself and electronegativity of scandium is 1.36 Electron affinity : is the amount of energy liberated when an electron is added to a neutral atom to form negatively charged ion and electron affinity of scandium is 18.1kJmol⁻¹ Ionization energy : is the energy to measure of the capability of an element to enter into chemical reaction requiring ion formation or donation of electron and ionization energy of scandium 631kJ Heat of fusion : is the enthalpy of fusion of the substances also known as heat of fusion is the change in its enthalpy resulting from providing energy and heat of fusion of scandium is 14.1kJ/molKnow more about atomic mass
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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 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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If a piece of metal, such as calcium or magnesium, reactw with atmospheric oxygen, would you expect the product to have a greater or lesser mass than the reacting metal
If a piece of metal, such as calcium or magnesium, reacts with atmospheric oxygen, the product would be expected to have a greater mass than the reacting metal.
Law of conservation of massEvery chemical reaction agrees with the law of conservation of mass.
According to this law, the mass of substances is conserved during the process of undergoing reactions. However, the mass could have been converted from one form to another during the reaction.
Going by this law, if substance A reacts with substance B to form a new substance AB, the mass of AB would be the addition of individual masses of A and B.
Thus, if a metal reacts with oxygen in the air, the mass of the product should be the mass of the metal plus the mass of the oxygen that reacts to form the product.
For example: [tex]2Mg + O_2 --- > 2MgO[/tex]
The mass of MgO, in this case, would be the mass of the Mg and the mass of the [tex]O_2[/tex]. Thus, the mass of MgO would be greater than the mass of Mg.
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Identify the product(s) in the following reaction:
Zn+2HCl → ZnCl₂ + H₂
Answer:
ZnCl2 + H2
Zinc (II) Chloride + Hydrogen gas
What is always true according to the Law of Conservation of Matter?
Answer:
same amount of matter exists before and after the change—none is created or destroyed
Explanation:
example
water will have the same mass when it freezes into ice
sciencingcom
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.
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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What would happen if we didn't have mercury (the element)
please help with this greatly appreciated
It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.
It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;
The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)
Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)
Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).
What is Hubble's Law?Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.
Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.
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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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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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