Ag^+ is an example of a Lewis acid.
What is a Lewis acid?According to the Lewis theory, a Lewis acid is any species that has an electron-deficient center or "hole" that can attract and accept a pair of electrons from a Lewis base. This electron-pair donation can result in the formation of a coordinate covalent bond between the Lewis acid and the Lewis base.
The concept of Lewis acids and bases is important in many areas of chemistry, including coordination chemistry, organometallic chemistry, and catalysis. It provides a useful framework for understanding chemical reactions and interactions between molecules in a wide range of chemical systems.
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What is the mass of 4 moles of iron?
13.961 g/mol
55.845 g/mol
223.38 g/mol
446.76 g/mol
223.2g is the mass of 4 moles of iron. Therefore, the correct option is option C.
What is mass?A body's mass is an inherent attribute. Until the discoveries of the atom as well as particle physics, it was thought to be tied to the amount of matter in some kind of a physical body.
It was discovered that although having the same quantity of stuff, various atoms and fundamental particles had varying masses.
moles = mass / molar mass
4 = mass / 55.8
mass =55.8 × 4 =223.2g/mol
Therefore, 223.2g is the mass of 4 moles of iron. The correct option is option C.
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What percent of Zn3 (PO4)2 is zine?
Answer:
The percentage of zinc in the compound; Zn3(PO4)2 is 50.65%.
What kind of insulators and conductors are used in Antarctica?
Wool and polystyrene, which trap air, are effective insulators. Aluminum and other metals are excellent heat conductors. A thermos keeps things cold for longer by limiting the flow of heat.
What is an example of an insulator?It is common to employ insulators like glass, plastic, rubber, air, and wood. Insulators protect us from the potentially dangerous consequences of electricity flowing via conductors. Voltage levels in electrical circuits can occasionally be extremely high.
The top four insulators are:Ceramics, wood, rubber, plastic, and rubber are effective insulators. They are frequently employed in the construction of cooking tools, like as saucepan handles, to prevent heat from rising and burning the cook's hand.
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Which type of bond is sodium bromide
Answer: Ionic bonding
Explanation:
metal + non metal = ionic bond
Sodium = metal
Bromine = nonmetal
Can you help me put this in order please i know henning Bramd go first but i need this quick
The order of the scientists in terms of when they lived and were prominent is :
Robert BoyleHennig BrandJohn NewlandsJ.J. ThomsonMarie CurieLothar MeyerDmitri MendeleevSir William RamsayErnest RutherfordGlenn SeaborgWhat are some details of the scientists ?Robert Boyle was an Irish natural philosopher and chemist who is best known for his contributions to the field of modern chemistry. Hennig Brand was a German alchemist who is credited with discovering the element phosphorus in 1669.
J.J. Thomson was British physicist who is best known for his discovery of the electron in 1897. Marie Curie was a Polish-born French physicist and chemist who is best known for her pioneering work on radioactivity.
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Calculate the mass of hydrogen gas produced when 12 grams of zinc react with excess sulfuric acid.
The mass of hydrogen gas produced when 12 grams of zinc reacts with excess sulfuric acid is 0.370 g.
What is molar mass?Ratio between the mass and amount of substance (measured in moles) of any sample is called molar mass.
Zn + H2SO4 -> ZnSO4 + H2
Molar mass of zinc is 65.38 g/mol.
moles of zinc is mass of zinc / molar mass of zinc
moles of zinc = 12 g / 65.38 g/mol
moles of zinc = 0.1838 mol
Moles of hydrogen gas is equal to moles of zinc
moles of hydrogen gas = 0.1838 mol
So, mass of hydrogen gas = moles of hydrogen gas x molar mass of hydrogen gas
mass of hydrogen gas = 0.1838 mol x 2.016 g/mol (molar mass of H2)
mass of hydrogen gas = 0.370 g
Therefore, the mass of hydrogen gas produced when 12 grams of zinc reacts with excess sulfuric acid is 0.370 g.
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I NEED THIS QUICK!!!
how many liters of CO2 are produced when 48.92g CaCO3 decomposes?
48.92 g of CaCO3 decomposes to produce 10.94 L of CO2 at STP.
What is calcium carbonate?Carbonic salt of calcium is called Calcium Carbonate.
CaCO3(s) → CaO(s) + CO2(g)
Molar mass of CaCO3 is 100.09 g/mol, so we calculate the number of moles of CaCO3 present as:
48.92 g CaCO3 ÷ 100.09 g/mol = 0.488 mol CaCO3
0.488 mol CO2 are produced
As volume of 1 mole of ideal gas at standard temperature and pressure (STP) is 22.4 L, hence we calculate volume of CO2 produced at STP as:
0.488 mol × 22.4 L/mol = 10.94 L
Therefore, 48.92 g of CaCO3 decomposes to produce 10.94 L of CO2 at STP.
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how does the muscular system work with other body systems
Answer:
controls involuntary movements of other organ systems
Explanation:
Now write the formulas of TWO compounds we can investigate--one that has an
element substituted for H, and one that has an element substitute for O. Write the
formulas separate by a comma, like this: X20, H2X
The term chemical formula is also called the molecular formula of a compound which represents the total number of atoms of each constituent elements present in one molecule of the compound.
What is chemical formula?The chemical formula is defined as the symbolic representation which gives the chemical composition of a compound. They also denotes the ratios in which the constituent elements combine to form the compound.
The chemical formula of a compounds with an element hydrogen are HCl, NH₃, HNO₃, etc. whereas the chemical formula of the compounds with an element 'O' are H₂O, H₂O₂, OH⁻, etc.
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If a gas effuses at a rate 0.52855 times as fast as CI2 what is the gas?
Answer:
The rate of effusion for a gas is inversely proportional to the square-root of its molecular mass (Graham's Law). The gas with the lowest molecular weight will effuse the fastest. The lightest, and therefore fastest, gas is helium.
Explanation:
Suppose Gabriella discovers that a hog farm is polluting a nearby river with chemicals called nitrates. She takes samples of water at various distances from the hog farm and measures the amount of nitrates in each sample. Which of the following graphs has the axes correctly labeled to show her results?
The correct graph to show her results would have the horizontal axis labeled as "Distance from Hog Farm" and the vertical axis labeled as "Amount of Nitrates."
What is Distance?Distance is the measure of how far apart two objects or points are. It is usually measured in units such as miles, kilometers, or meters. Distance is an important concept in mathematics, physics, and other sciences, as it can be used to calculate the time it takes for an object to travel from one point to another. Distance can also be used to measure the size of an object, or the length of a line. Distance can also be used to measure the amount of energy it takes to move an object from one point to another. In short, distance is a measure of the space between two objects or points.
This graph would show how the amount of nitrates increases with increasing distance from the hog farm.
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At 60°c, the ion-product constant of water, kw, is 9. 25 × 10–14. What is the ph of pure water at 60°c ?
The pH of pure water at 60°C is approximately 7.02, which indicates a neutral solution.
At 60°C, the ion product constant of water,[tex]Kw, is 9.25 × 10^–14.[/tex]
For pure water at this temperature, the concentration of H+ ions is equal to the concentration of OH- ions, so we can write:
[tex]Kw = [H+][OH-] = (x)(x) = x^2[/tex]
where x is the concentration of H+ ions (and also OH- ions) in mol/L.
Taking the square root of both sides, we get:
[tex]x = sqrt(Kw) = sqrt(9.25 × 10^–14) = 9.62 × 10^–8 mol/L[/tex]
Therefore, the pH of pure water at 60°C is:
[tex]pH = -log[H+] = -log(9.62 × 10^–8) = 7.02[/tex]
So the pH of pure water at 60°C is approximately 7.02, which indicates a neutral solution.
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What problems might it cause if a company tried to recycle materialswithout sorting them first?
M
on 8.
Rocks are made of minerals, and they are formed in different ways.
crystallization.
Igneous Rock'
weathering,
erosion & deposition
Printable Worksheet - The Rock Cycle - Study Island
sediment
magma
melting
heat & pressure
weathering,
erosion & deposition
compaction & cementation
melting
Metamorphic Rock
1
heat & pressure
Sedimentary Rock
According to the diagram above, how are sedimentary rocks formed?
OA. Wastes deposited by plants and animals decompose and weather.
OB. Sand and other particles are buried, compacted, and cemented together.
OC. Molten rock cools and turns solid.
OD. Other rocks experience intense heat and pressure.
Sand and other particles are buried, compacted, and cemented together.
How does sedimentary rock form?Sedimentary rock is formed from the accumulation and cementation of sediment. The process of sedimentation begins when weathering and erosion break down pre-existing rocks, soils, or organic materials into small pieces, such as sand, silt, or clay. These pieces are then transported by water, wind, or ice and deposited in a new location, such as a river bed, a lake, a delta, or an ocean floor.
Over time, the layers of sediment build up and become buried under more sediment. As the weight of the overlying sediment increases, the pressure on the lower layers also increases. This pressure, combined with the presence of groundwater, causes the minerals in the sediment to dissolve and re-crystallize, forming a cementing agent that binds the sediment particles together. This process is called cementation.
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Based on the table above, which amount of a compound dissolved in 100 grams of water at the stated temperature represents a system at equilibrium?
Select one:
a.
20 g KClO3 at 70 degrees Celsius
b.
75 g NaNO3 at 10 degrees Celsius
c.
40 g NaCl at 70 degrees Celsius
d.
75 g Pb(NO3)2 at 40 degrees Celsius
Which compound is a member of the same homologous series as C3H6?
The answer to the question indicates that C2H4 belongs to the identical homologous series as C3H6. The correct option is A) .
Describe a compound using an example.A mixture is a material that is created chemically when two or more components are mixed in a certain weight ratio. They have distinct physical and chemical features and are homogenous. The compound water is an example. It is composed of the two chemicals hydrogen as well as oxygen, which chemically combine in a predetermined weight-to-ratio of 1:8.
What are an element and a compound?A compound is made up of atoms from several elements that have been chemically mixed in a certain ratio. A pure chemical compound comprised of the same atom is called an element. Composition.
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find the pressure of 8.88 mol of helium gas at 20.0 C and 180L volume
According to the ideal gas equation, the pressure of 8.88 mole of helium gas at 20.0° C and 180 L volume is 111.97 atmospheres.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
According to the ideal gas equation , PV=nRT substitution gives P= 8.88×8.314×273/180=111.97 atmospheres.
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List one use for each of the following minerals.
Chalcopyrite
Pyrolusite
Kyanite
Talc
Chalcopyrite's sole significant application is as a copper ore, yet the significance of this one use cannot be overstated. as a minor copper resource and as examples of minerals.
What distinguishing features does chalcopyrite possess?It is brassy to golden yellow in color and rates 3.5 to 4 on the Mohs scale for hardness. The streak clearly shows a greenish hue to it. Brass yellow with a potential for iridescent purplish tarnish. mainly the disphenoid, resembles a tetrahedron, is frequently large, and occasionally has a botryoidal shape.
Where is chalcopyrite most frequently discovered?Chalcopyrite is a copper and iron sulfide mineral that is the most prevalent copper mineral and a significant copper resource. In ore veins deposited at medium to high temperatures, such as those in Rio Tinto, it often occurs.
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How many liters of butane (C4H10) will be needed to produce 1.55L h2O at STP(Standard temperature and pressure)?
Explanation:
Refer to pic.............
3RD TIME TRYING CHEMISTRY QUESTION, PLEASE HELP
I've tried this question already but I didn't get the full answer. If you could help with all of them, that would be great <3
If Reaction B was at equilibrium and then was heated ______ CH3OH would be present after the reaction adjusts to the new temperature.
- more
- less
- the same amount of
If Reaction B was at equilibrium and then H2 was added, _____ CH3OH would be present after the reaction adjusts.
- more
- less
- the same amount of
If Reaction B was at equilibrium and then H2 was added, _____ CO would be present after the reaction adjusts.
- more
- less
- the same amount of
The effect of change of pressure, concentration and temperature on the state of equilibrium can be predicted with the help of Le Chatelier's principle.
What is Le Chatelier's principle?If a system in equilibrium is subjected to a change in concentration, pressure or temperature, the equilibrium shifts in the direction that tends to reduce the effect of the change.
According to Le Chatelier's principle, the increase of temperature will shift the equilibrium in the direction of endothermic reaction. Here the forward reaction is exothermic, so more amount of CH₃OH will be produced.
If H₂ is added, more amount of CH₃OH will be produced and less amount of CO will be present.
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in a covalent molecular bond atoms blank valence electrons to follow the octet rule in a dot diagram covalent bonds are represented with blank instead of dots
According to the Octet Rule, for a molecule to be stable, all of the atoms must have 8 valence electrons, either by sharing, losing, or acquiring electrons. Atoms typically exchange electrons within covalent bonds in order to adhere to the Octet Rule.
Define covalent bond
The exchange of one or more pairs of electrons between two atoms forms a covalent bond. The two atomic centers are drawing these electrons in unison. When there is insufficient space between two atoms' electronegativities for an electron transfer to take place and create ions, a covalent bond is formed.
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A student mixed 24.5 g of magnesium bromide with 8.67 x 1022 molecules of hydroiodic acid... They recovered 8.23 g of acid. What is the percent yield?
Answer:
Explanation:
To calculate the percent yield of a reaction, we need to compare the actual yield (the amount of product obtained in the experiment) with the theoretical yield (the amount of product that should have been obtained based on stoichiometric calculations).
The balanced chemical equation for the reaction between magnesium bromide (MgBr2) and hydroiodic acid (HI) is:
MgBr2 + 2HI → MgI2 + 2HBr
From this equation, we can see that 1 mole of MgBr2 reacts with 2 moles of HI to produce 1 mole of MgI2 and 2 moles of HBr. We can use this information to calculate the theoretical yield of HBr that should have been obtained based on the amount of MgBr2 used:
Calculate the moles of MgBr2 used:
moles of MgBr2 = mass / molar mass = 24.5 g / 184.11 g/mol = 0.133 moles
Use the mole ratio from the balanced equation to calculate the moles of HBr that should have been produced:
moles of HBr = 2 x moles of MgBr2 = 2 x 0.133 moles = 0.266 moles
Calculate the mass of HBr that should have been produced:
mass of HBr = moles of HBr x molar mass = 0.266 moles x 80.91 g/mol = 21.47 g
So the theoretical yield of HBr is 21.47 g.
The actual yield of HBr obtained in the experiment is 8.23 g.
We can now calculate the percent yield as:
percent yield = (actual yield / theoretical yield) x 100%
percent yield = (8.23 g / 21.47 g) x 100%
percent yield = 38.4%
Therefore, the percent yield of the reaction is approximately 38.4%.
michelle decides that the sample is from a sedimentary rock. Which sentence explains why michelle classifies the sample as a sedimentary rock
Answer:
Theres a quizzes answer key online, I had these same questions
Explanation:
The layers show that the rock was formed by one or more
minerals that compacted over time.
What is the condensed formulas and IUPAC name for the following compound:
-ethyl alcohol (in beverages)
Ethanol (also known as ethanol) has the chemical formula [tex]C_{2} H_{5} OH[/tex] and the chemical formula[tex]CH_{3} CH_{2} OH[/tex].
How does a chemical formula work?In a chemical formula, each item's smallest quantity, such as a monomer or formula unit, is listed together with the total atoms in that unit. By referring to the names of the constituent parts and a few straightforward rules, we may name simple mixtures given a chemical formula.
The chemical formula: why is that?The chemical nomenclature of a compound is represented by its chemical formula. It displays the component elements and how many atoms from each element are found in a single complex molecule.
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label any polar bonds on the indigo dye bond and identify the 2 central atoms with different geometry and identify it
The N - H and the C- O and the C- N bonds in indigo dye are polar on nature.
What are the polar bonds in indigo dye?Indigo is a blue dye that is derived from the leaves of certain plants. The chemical structure of indigo consists of two benzene rings connected by a nitrogen atom. The molecule has several polar bonds due to the electronegativity differences between the atoms.
The polar bonds in indigo include:
The nitrogen-carbon bonds: The nitrogen atom in the middle of the molecule is connected to two carbon atoms, one in each benzene ring. Nitrogen is more electronegative than carbon, so the nitrogen-carbon bonds are polar.
The carbon-oxygen bonds: Indigo has two oxygen atoms that are double bonded to carbon atoms in the benzene rings. Oxygen is more electronegative than carbon, so the carbon-oxygen bonds are also polar.
The carbon-nitrogen bond: The nitrogen atom in the middle of the molecule is also connected to a carbon atom in one of the benzene rings. This bond is polar due to the electronegativity difference between carbon and nitrogen.
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In the reaction 2A₂ +2Bo -> 2A₂0 +B2, doubling
the concentration of A2, doubles the rate of reaction but
the reaction rate is
quadripled when the concentration of
Bo is doubled, determine the rate law and order of reaction
The order of a reaction is the sum of the powers of the concentration terms of the reactants in the experimentally determined rate equation for the reaction.
What is rate law?The rate law expresses the experimentally observed rate of a reaction in terms of the molar concentrations of the reactants which determine the rate of a reaction.
The rate law of the given reaction is:
rate = k [A₂]²[B₀]²
If [B₀] = 2B₀
Then the rate law is:
rate = k [A₂]²[2B₀]²
= k [A₂]²4[B₀]²
= 4k
The order of the reaction is 4.
Thus the rate law and order of the reaction is determined.
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According to the ideal gas law, what will be the volume of 0.25 mol of nitrogen at 0.82 atm pressure and 57 C temperature
How do the properties analysed in this activity show periodicity of the chemical elements? For instance, as the ionics radius increases
The properties analyzed in this activity, such as ionic radius, atomic radius, and electronegativity, show periodicity of the chemical elements
It is because they are repeated in a systematic and predictable fashion as you move across a period in the periodic table. Specifically, as you move across a period, the ionic radius increases from left to right. This occurs because the nucleus of elements to the left of the period is larger and has more protons, while the valence electrons increase from left to right, meaning the elements to the right of the period have more electrons that are farther away from the nucleus.
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Analyze the given diagram of the carbon cycle below.
Part 1: Which compound does C represent?
Part 2: Name a process that could release this compound into the air.
Part 3: Explain how the elements that form it are conserved during the carbon cycle. Use complete sentences to explain your answer.
Justify how this compound was created from a recycling of carbon in the carbon cycle. Use complete sentences to explain your answer.
Part 1: C represents the compound carbon dioxide (CO2), in the given diagram of the question .
Carbon CyclePart 2: One process that could release carbon dioxide into the air is combustion, which occurs when organic compounds (such as fossil fuels) react with oxygen in the air to produce carbon dioxide and water. Other processes that can release carbon dioxide include volcanic eruptions, natural decay of organic matter, and respiration by living organisms.
Elements that form itPart 3: The elements that form carbon dioxide, namely carbon and oxygen, are conserved during the carbon cycle. This is because carbon is constantly being exchanged between the atmosphere, oceans, and land through processes such as photosynthesis, respiration, and decomposition. When plants undergo photosynthesis, they take in carbon dioxide from the atmosphere and use it to build their biomass, incorporating carbon into their structures. When animals eat plants or other animals, they consume this carbon and release carbon dioxide back into the atmosphere through respiration. When organisms die, their bodies decompose and release carbon back into the environment. In this way, carbon is constantly being recycled through the carbon cycle.
The formation of carbon dioxide from the recycling of carbon occurs during cellular respiration, which is the process by which living organisms break down organic compounds (such as glucose) to release energy. During cellular respiration, carbon-based molecules are oxidized, or combined with oxygen, to produce carbon dioxide as a waste product. This carbon dioxide can then be released back into the atmosphere or taken up by plants through photosynthesis.
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Someone does this one thanks
The balanced equation is;
Ba(OH)2 + CO2 → BaCO3 + H2O
How do we balance reaction equation by atom count?Here are the general steps to balance a chemical equation by atom count:
Write the unbalanced equation for the reaction, showing the formulas of the reactants and products.
Count the number of atoms of each element present on the reactant side and the product side of the equation.
Identify the element with the largest atom count that is unbalanced.
Balance this element by adjusting the coefficient of one of the reactants or products.
Recount the atoms of this element on both sides of the equation and adjust the coefficient of another reactant or product as necessary.
Repeat steps 4 and 5 for each element that is unbalanced until the equation is balanced.
Check your balanced equation to make sure that the same number of atoms of each element is present on both the reactant and product sides of the equation.
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