The mass of 6.89 x 10²⁵ molecules of CO₂ will be approximately 0.5068 kg.
To find the mass in kilograms of 6.89 x 10²⁵ molecules of CO₂, you can use the formula:
mass (kg) = (number of moles) x (molar mass in g/mol) / (1000 g/kg)
First, convert the number of molecules to moles by dividing by Avogadro's number (6.02 x 10²³mol⁻¹) :
6.89 x 10²⁵ CO₂ molecules / 6.02 x 10²³mol⁻¹ = 11.46 x 10² mol
Then, use the molar mass of CO₂ (44.01 g/mol) to find the mass in grams: 11.46 x 10²mol x 44.01 g/mol = 506.8 x 10² g
Finally, convert the mass in grams to kilograms by dividing by 1000 g/kg: 506.8 x 10² g / 1000 g/kg = 0.5068 kg
So, the mass of 6.89 x 10²⁵molecules of CO₂ is approximately 0.5068 kg.
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given that oxygen has an atomic number of 8, what is your best estimate for the atomic mass of the oxygen atom? (hint: your answer should contain no decimals)
In this case Oxygen has a Weighted Average Atomic Mass of 15.999 AMU.is the best estimate for the atomic mass of the oxygen atom .
What is called oxygen?Oxygen is a chemical element a substance that contains only one type of atom. Its official chemical symbol is O, and its atomic number is 8, which means that an oxygen atom has eight protons in its nucleus. Oxygen is a gas at room temperature and has no colour, smell or taste.
Is oxygen good for health?Oxygen is a gas that your body needs to work properly. Your lungs absorb oxygen from the air you breathe. The oxygen enters your blood from your lungs and travels to your organs and body tissues.
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how many faradays are needed to deposit 10.5 g of copper onto the surface of an electrode from a solution of cu2 ? (molar mass of copper
To deposit 10.5 g of copper onto the surface of an electrode from a solution of cu2, 0.3297 faradays is needed.
Given the mass of copper (m) = 10.5g
It is known that the molar mass of copper (M) = 63.5g
To deposit copper onto the surface of an electrode from a solution of cu2
Cu -> Cu2+ + 2e-
One mole of Cu2+ in the electrolysis requires the passage of two moles of electrons, according to the stoichiometry of this equation.
Here 2e- are released from the solution such that
1Cu release faradays of = 2/M = 2/63.5 = 0.0314
Then 10.5g of copper release faradays = 10.5 x 2/63.5 = 0.3297
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2H₂ + O2 --> 2H₂O
If you have 16 moles of Hydrogen gas (H₂), how many moles of Oxygen gas (0₂) will
you need to make as much water as possible?
(Enter just the number; not the number and units)
Your Answer:
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 8moles of Oxygen gas (0₂) will be needed to make as much water as possible.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
2H₂ + O[tex]_2[/tex] [tex]\rightarrow[/tex] 2H₂O
the mole ratio between oxygen and hydrogen is 1:2
mole of oxygen =1/2 mole of hydrogen = 8moles
Therefore, 8moles of Oxygen gas (0₂) will be needed to make as much water as possible.
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write an equation that shows how the anion acts as a base.For F , write an equation that shows how the anion acts as a base.Express your answer as a chemical equation. Identify all of the phases in your answer
Create an equation that demonstrates the anion's base-like behavior. Put your response in the form of a chemical equation. In your response, list each phase.
Which five chemical equations can you think of?Simple Chemical Reaction Examples
oxygen and hydrogen ---> oxygen, iron, and water chloride, lime + carbon dioxide, rust, potassium and chlorine gas, sodium bicarbonate
Using water, carbon dioxide, and light, photosynthesis creates glucose and oxygen.
Give an example of a chemical equation.The initial entities are presented here on left hand side of a chemical equation, while the product things are given on the right hand side. A molecular formula is an universal symbol of a chemical reaction that takes the form of symbols and equations. such as CaCO3(s)CaO(s)+CO2 (g)
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which of the following statement is correct? group of answer choices forming bonds lowers the energies of electrons. higher energy electrons are less chemically reactive. o has higher ionization energy (ie) than f. if the energy of electron in an atom is low, less energy is required to remove it from the atom.
Bonds form because favorable interactions between orbitals and the electrons in those orbitals allow the system to become more stable. High ionization energy means low reactivity.
Do more electrons necessarily imply less reactivity?With more shielding electrons in an atom, reactivity diminishes. A negative charge is present in electrons. The outer-shell electrons are thus pushed back by the inner-shell electrons. The nucleus's attraction to the surrounding electrons is reduced by this repulsion.
Why does bonding make energy go down?Because covalent bonds carry less energy than individual atoms would, they are more stable. The diagram shows how the potential energy of the system drops as the atoms first start to interact because the attractive attraction outweighs the repulsive force.
Are more reactive people more electron-affinity?Reactivity often rises as electron affinity does. The idea of electron affinity and the nonmetals' reactivity are closely related.
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which structure represents the bond that forms when aluminum and chlorine combine in an ionic compound
The structure represents the bond that forms when aluminum and chlorine combine in an ionic compound is Aluminium Chloride (AlCl3).
About Aluminum ChlorideAluminium chloride (AlCl3) is the main chemical compound of aluminum and chlorine. This compound is white in color, but samples are often contaminated with iron trichloride, which gives a yellow staining. The solid has low melting and boiling points. These compounds are primarily produced and consumed in the production of aluminum metal, but large amounts are also used in the chemical industry. These compounds are often classified as Lewis acids. This is an example of an inorganic compound that crack at low temperatures, changing back and forth from polymer to monomer.
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A mixture contains only NaCl and Fe(NO3)3. A 0.471 g sample of the mixture is dissolved in water and an excess of NaOH is added, producing a precipitate of Fe(OH)3. The precipitate is filtered, dried, and weighed. Its mass is 0.137 g. Calculate the following.
The process's chemical reaction is
From the foregoing reaction, it can be deduced that 0.001 mol of Fe(OH)3 is produced for every 1 mol of Fe(NO3)3
Therefore, 0.001 mol of Fe(NO3)3 may be converted into 0.001 mol of Fe(OH)3 Fe(NO3)3 mass in the sample is
Consequently, the sample's Fe(NO3)3 mass is 0.242 g.
calculating the mass percentage of in the sample
The sample's mass percent of Fe(NO3)3 is
Consequently the samples mass percent of Fe(NO3)3 is 53.07%
Producing something is the act of creating something out of components or raw resources To put it another way production employs inputs to produce an output that is fit for consumption a thing or product that has value for a consumer or end user. Okay, so we all know that production is the act of manufacturing goods from raw materials, but it also has economic worth since it results in a product that is valuable and will satiate people's desires and requirements. A company that creates items is referred to as a producer in economics These businesses use the inputs—both material and immaterialthat are available to them to create commodities that consumers will wish to purchase
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copper(I) ions in aqueous solution react with NH3(aq) according toCu^+(aq) + 2NH3(aq) yields Cu(NH3)2^+(aq), Kf=6.3*10^10 M^-2calculate the solubility (in g . L^-1) of CuBr(s) in 0.23 M NH3(aq)answer must be in g/L
The copper(I) ions in aqueous solution react with NH₃ (aq). The solubility of the CuBr in 0.23 M NH₃ is 57.24 g/L.
The solubility equilibrium of the CuBr :
CuBr(s) ⇄ Cu⁺(aq) + Br⁻(aq)
Ksp = [Cu⁺] [ Br⁻] = 6.3 × 10⁻⁹
[Cu(NH₃)₂]⁺ , Kf = 6.3 × 10¹⁰
Kf = [Cu(NH₃)₂]⁺ / [Cu⁺] [NH₃]²
= 6.3 × 10¹⁰
K = [Cu(NH₃)₂]⁺ [Br⁻] / [NH₃]²
= ([Cu(NH₃)₂]⁺) / [Cu⁺] [NH₃]² ([Cu⁺] [ Br⁻] )
K = Kf ×Ksp
K = 4 × 10²
CuBr + 2NH₃ ⇄ [Cu(NH₃)]⁺ + Br⁻
K = [Cu(NH₃)]⁺ [ Br⁻] / [NH₃]²
4 × 10² = x × x / ( 0.23 - 2x)²
x = 0.39
The solubility of CuBr = 0.399 × 143.5
= 57.24 g/L
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Classify these molecules as polar or nonpolar.
Drag each item to the appropriate bin.
> View available hint(s)
BCl3 CH3NH2 CCL4 H2 HCL H2O
Polar?
Non polar?
Sort these chemicals into polar or nonpolar groups. Drag every thing to the proper bin. View available hints for BCl3 CH3NH2 CCL4 Hydride Hci Pure water.
What distinguishes a molecule as polar or nonpolar?Result for an image Sort these chemicals into polar or nonpolar groups. Drag every thing to the proper bin. View hint(s) available BCl3 CH3NH2 Colchicine H2 Hci H2O Polar? Null polarity
Non-polar molecules lack unshared electrons and are symmetrical. Polar molecules were asymmetric, either having atoms with differing electronegativities bound together or having lone electron pairs on a core atom.
How can you know by looking at a molecule if it is polar or nonpolar?More importance is placed on the atoms' arrangement. Let's examine the symmetric molecules now. Every particle that.
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complete this table relating the values of E°cell and δG° to k : >0, =0, or <0 for: K E°cel .δG° <1 =1 >1
The formula of the Nernst equation establishes the relationship between both the reactions quotient, electro chemical potential, temperatures, and standard cell potential. Ecell is equivalent to E0 minus (RT/nF) lnQ.
What is the temperature?A system's temperature can be used to calculate its average kinetic energy. As the particle's velocity rises, the system's kinetic energy also begins to grow, which raises the temperature of the system. Heat is the energy that is transmitted when two bodies having different surface temperatures interact. When two bodies of different temperatures were kept in contact, the direction for heat transfer is dependent on the temperatures. SI units use the kelvin (K).
How do we measure temperature?We use thermometers to monitor temperature; chances are, you have one of them in your home for when you're feeling under the weather. Mercury-filled thermometers were once common, but they are no longer used because of the risk of mercury leakage or thermometer failure.
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i have an unknown volume of gas at a pressure of 730 mm hg and a temperature of 315 k. if i raise the pressure to 810 mm hg, decrease the temperature to 295 k, and measure the final volume to be 28 liters, what was the initial volume of the gas?
1000 L will be rounded up to one significant amount for the new pressure. According to Boyle's law, the volume and pressure vary inversely when a gas is kept in a closed container at a fixed temperature and mass.
How are 760 mmHg determined?
As was already mentioned, one millimeter of mercury is the pressure that a 1mm vertical column of mercury exerts at absolute zero. Additionally, we are aware that one atmosphere (atm) equals 760 millimeters of mercury (mmHg), or one torr.
What is a case of Boyle's law?
A balloon serves as an illustration of Boyle's rule in action. The balloon is filled with air, and that air's pressure causes it to expand.
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ionic compounds are brittle because the strong attractive forces a. cause the compound to vaporize easily. b. allow the layers to shift easily. c. hold the layers in relatively fixed positions. d. keep the surface dull.
The right answer is (C). Ionic compounds are brittle because the layers are held in place by strong attraction forces.
How can an ionic substance be recognized?Ionic bonding would typically be found in compounds where a metals is bound to a non-metal or even a semi-metal. Molecules are those contain just non-metals or semi-metals combined with non-metals and display covalent bonding.
Ionized or covalent water?The bond between the two hydrogen atoms in a water molecule, which is ionic in nature but has a covalent bond instead, is formed when they place their positive charges on opposite sides of a oxygen atom, that has a negatively charged.
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What is an atom,alloy and element?
c) Describe a method to determine the mass of dissolved solids in a 100 cm³ sample of
river water.
Page 1 of 2
(4) (Total 7 marks)
3
A gravimetric analysis is one way to find out how much-dissolved solids there are in a 100 cm3 sample of river water.
What is gravimetric analysis?Generally, One method to determine the mass of dissolved solids in a 100 cm³ sample of river water is through the use of a gravimetric analysis.
This involves first filtering the water sample to remove any suspended solids, then evaporating the remaining liquid to leave behind the dissolved solids.
The remaining solid material can then be weighed, and the mass of the dissolved solids in the original sample can be calculated.
Additionally, chemical analysis can be used to determine the concentration of dissolved solids by using volumetric analysis, by using ion-selective electrodes or by using spectrophotometry.
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Which electron configuration represents an
excited state for a potassium atom?
(1) 2-8-7-1 (3) 2-8-8-1
(2) 2-8-7-2 (4) 2-8-8-2
Since Potassium atom is made up of 19 electrons, that is, its atomic number is 19; therefore the electronic configuration that represents potassium in an excited state is 1s²2s²2p⁶3s²2p⁶4s⁰4p¹
The electron configuration that represents an excited state for a potassium atom is 2-8-7-1. Option (1) is correct.
Potassium is a chemical element with the symbol K (from Neo-Latin kalium) and atomic number 19. The electron configuration of potassium is 1s²2s²2p⁶3s²3p⁶4s¹.
The excited state of potassium would be when one of the 4s electrons jumps to a higher energy level (orbital) such as 4p, 5s, 5p, etc. resulting in an electron configuration of 2-8-7-1.
So, the option (1) 2-8-7-1 represents the excited state for a potassium atom.
The distribution of electrons in an element's atomic orbitals is described by its electron configuration. Atomic electron configurations follow a standard notation in which all electron-containing atomic subshells are arranged in a particular order, with the number of electrons they hold written in superscript.
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find the molar solubility of srco3 (ksp = 5.4 × 10^−4) :
(a) pure water
(b) 0.13 M Sr(NO3)2
The molar solubility of SrCO₃ in pure water is 2.32×10⁻² M. And in 0.13 Sr(NO₃)₂ is 4.15×10⁻⁴ M.
A relatively tiny number of the salt's ions are present in the solution when the salt is sparingly soluble in water. The term "molar solubility" refers to the number of ions in the solution.
a) In pure water, the solubility of SrCO₃ is given by [tex]\mathrm{SrCO_3 \rightleftharpoons Sr^{2+}+CO_{3}^{2-}}[/tex]. Consider the concentration of [tex]\mathrm{Sr^{2+}}[/tex]and [tex]\mathrm{CO^{2-}_3}[/tex] as x. and Then, the molar solubility of SrCO₃ in water is calculated as follows,
[tex]\begin{aligned}K_{sp}&=\mathrm{[Sr^{2+}][CO^{2-}_3]}\\ 5.4\times 10^{-4}&=x\times x\\x^2&=5.4\times 10^{-4}\\x&=\sqrt{5.4\times 10^{-4}}\\&=\mathrm{2.32\times 10^{-2}\;M}\end{aligned}[/tex]
The value is 2.32×10⁻² M.
b) In 0.13 Sr(NO₃)₂, the dissociation is given by the[tex]\mathrm{Sr(NO_3)_2\rightarrow Sr^{2+}+2NO_3^-}[/tex]. Here, [Sr(NO₃)₂] = [Sr²⁺]=0.13 M. Now, construct the RICE table for this reaction. Now, calculate the molar solubility,
[tex]\begin{aligned}K_{sp}&=\mathrm{[Sr^{2+}][CO_3^{2-}]}\\5.4\times 10 ^{-4}&=(0.13+x)(x)\end{aligned}[/tex]
Here, the solubility product has a relatively low value, it is possible to neglect changes in ion concentration.
[tex]\begin{aligned}(0.13)(x)&=5.4\times10^{-4}\\x&=\frac{5.4\times10^{-4}}{0.13}\\&=\mathrm{4.15\times 10 ^{-3}\;M}\end{aligned}[/tex]
The value is 4.15×10⁻⁴ M.
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In 2019 Physics Today published an article stating that Venus may not be Earth's closest neighbor. This information was based off of some calculations done by a PhD candidate from the University of Alabama and two mechanical engineers. The researchers devised a new mathematical technique, called the point-circle method, to measure the distances between planets. This method averages the distance between a bunch of points on each planet's orbit, thereby taking time into consideration. However, not everyone agrees with this new definition of "closest" planet. It seems there may be some scientific biases in the calculations. Venus is “our closest planetary neighbor,” which is true if we are talking about which planet has the closest approach to Earth but not if we want to know which planet is closest on average. NASA and many scientists still recognize Venus as our closest neighbor. Do you think this new calculation should be addressed in our text? Do you think the term "closest neighbor" needs to be defined better?
Answer: Venus is considered the closest planetary neighbor when measuring closest approach, but a new method called the point-circle method may indicate a different closest neighbor when taking time into consideration.
Explanation: Venus is traditionally considered the closest planetary neighbor to Earth due to its closest approach to our planet. However, a new method called the point-circle method, devised by researchers from the University of Alabama, takes time into consideration when measuring distances between planets. This method averages the distance between a bunch of points on each planet's orbit, which may indicate a different closest neighbor. However, this new method is not yet widely accepted and more research needs to be done to confirm its accuracy. It's important to define the term "closest neighbor" in context to avoid confusion.
The enthalpy of FeBr3 (s) is -269 kj/mol and the enthalpy of the reaction 2Fe(s) +3Br2(g) ->2FeBr3 (s) is -631 kj/mol. Calculate the enthalpy of evaporation of Br2 (l) which is liquid at 25C.
The reaction 2Fe(s) +3Br2(g) ->2FeBr3 (s) has an enthalpy of -631 kj/mol and has an enthalpy of -269 kj/mol. the enthalpy of evaporation of Br2 (l) which is liquid at 25C is 142.7KJ/mol
The enthalpy of evaporation of a substance is the heat absorbed when one mole of the substance is converted from a liquid at its boiling point to a gas at the same pressure. To calculate the enthalpy of evaporation of Br2, we need to use the enthalpy of formation of FeBr3 and the balanced equation for the reaction.
The enthalpy of formation of a substance is the heat absorbed or released when one mole of the substance is formed from its elements at standard conditions.
ΔHf(FeBr3) = -269 kJ/mol
ΔHrxn = -631 kJ/mol2Fe(s) + 3Br2(g) -> 2FeBr3(s)
ΔHrxn = 2(ΔHf(Fe(s)) + 3(ΔHf(Br2(l)) - ΔHf(FeBr3(s)) -631 = 2(0) + 3(ΔHf(Br2(l)) -(-269)
3(ΔHf(Br2(l)) = -631 + 2(0) + 269
ΔHf(Br2(l)) = -631 + 2(0) + 269 / 3
ΔHf(Br2(l)) = -142.7 kJ/mol
The enthalpy of evaporation of Br2 is -142.7 kJ/mol
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Which processes result in the release of carbon? Check all that apply.
Animals break down food molecules to obtain energy.
The remains of producers are broken down by decomposers.
The remains of consumers are broken down by soil decomposers.
A) Animals break down food molecules to obtain energy. B) The remains of producers are broken down by decomposers. and C) The remains of consumers are broken down by soil decomposers.
What is decomposers?Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition. Decomposers are a vital part of the food chain and the nutrient cycle. They are usually fungi and bacteria, but may also include other organisms, such as protists and certain animals, like worms and certain insects. Decomposers play an important role in the cycle of matter and energy in an ecosystem. They break down dead and decaying organisms, as well as feces, and in doing so, they release important nutrients back into the soil, which can then be used by other organisms. Decomposers are essential for the health of an ecosystem, as they help to maintain the balance of organisms and resources in an environment.
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Use the molar solubility 3.27 * 10-11 M in pure water to calculate Ksp for NiS
This value indicates that NiS is very slightly soluble in water and thus will not readily dissolve in it.
What is soluble?Soluble describes substances that can be dissolved in a liquid. When a substance is soluble, it is able to form a homogenous solution with the liquid, meaning that the substance will spread out evenly throughout the liquid. Common examples of soluble substances include sugar and salt, which can be dissolved in water. Other substances, such as oil, are insoluble and will not dissolve in a liquid.
The Ksp of NiS is equal to the molar solubility of NiS in pure water raised to the power of two. This is because NiS dissociates into two ions in water (Ni2+ and S2-). Therefore, the Ksp of NiS can be calculated as follows:
Ksp = (3.27 x 10-11 M)2 = 1.06 x 10-21
This means that the solubility product constant (Ksp) of NiS is equal to 1.06 x 10-21. This value indicates that NiS is very slightly soluble in water and thus will not readily dissolve in it.
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Determine whether each of the following solutes is more soluble in hot water or cold water. Drag the appropriate items to their respective bins. Sodium Nitrate, Nitrogen Dioxide, Ozone, Fructose, Carbon Monoxide
The following solutes is more soluble in: Hot Water: Sodium Nitrate, Fructose and Cold Water: Nitrogen Dioxide, Ozone, Carbon Monoxide
What is solutes?Solute is a substance that has been dissolved in a solution. A solution is a mixture of two or more substances, where one substance is dissolved into the other. The substance that is dissolved is called the solute, while the substance that does the dissolving is called the solvent. Common examples of solutes include sugar, salt, and acids.
Sodium nitrate and fructose both dissolve better in hot water than in cold water.
Cold Water: Nitrogen Dioxide, Ozone, Carbon Monoxide
Nitrogen dioxide, ozone, and carbon monoxide are all more soluble in cold water than in hot water.
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according to the bohr model of the atom, the single electron of a hydrogen atom circles the nucleus...
According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus in Specific, circular parts or orbits.
The Bohr model depicts electrons in fixed orbits. According to the model, electrons in atoms move in circular orbits around a nucleus in the center and are only able to orbit in a stable condition when they are in specific fixed circular orbits that are located a specific range of distances from the nucleus.
In his atomic model, he put forth the idea that an electron travels in a predetermined circular path or orbit around the nucleus, orbiting at a given energy level.
As a result of the foregoing, we can conclude that the response, According to the Bohr model of the atom, a hydrogen atom's lone electron circles the nucleus in distinct, elliptical sections or orbits, is correct.
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In the peptide Ala-Try-Gly-Phe, the N-terminal amino acid is a. alanine. b. aspartic acid. c. tryptophan. d. phenylalanine. e. glycine.
In the peptide Ala-Try-Gly-Phe, N-terminal amino acid is a.) alanine.
What is amino acid?Amino acids are the building blocks of proteins. Life's essential building blocks are proteins and amino acids. Byproducts of breakdown/ digestion of proteins are amino acids. The body uses amino acids to make the proteins that help in the meal digestion.
Both amino and carboxylic acid functional groups are found in the organic compounds known as amino acids. Of the different amino acids found in the nature, alpha-amino acids, thar are the building blocks of proteins, are by far the most important. There are 22 alpha amino acids in the genetic code.
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Number of unpaired electrons in complex ion :
[tex]{\sf [Fe(CN)_6]^{3-}} [/tex]
Answer:
[tex] {[Fe(CN)6]}^{- 4} [/tex]
has no unpaired electrons as CN
is a strong field ligand
which options correctly describe the procedure used to determine the number of significant digits in a reported quantity? (select all that apply.)
A) and D) correctly describe the procedures used to determine the number of significant digits in a reported quantity.
What is explanation for determining significant digits?Up until the first nonzero digit, work your way right from the left. This is correct because the first nonzero digit is considered the most significant digit and all digits to the right of it are considered significant. If there is a decimal point, all digits starting with the first nonzero digit (moving to the right) are significant.. This is correct because when a decimal point is present, it indicates that the digits to the right of it represent fractional parts of the number and are therefore significant.
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Which options correctly describe the procedures used to determine the number of significant digits in a reported quantity? Check all that apply: A)Start at the left and move right until you reach the first nonzero digit.
B)Zeros between other nonzero digits are not significant if there Is no decimal point.
C) Start at the right and count all the nonzero digits In the number.
D) AIl digits from the first nonzero digit onward (going to the right) are significant, if there Is a decimal point.
E)If the quantity has no decimal point; zeros to the right of the nonzero number may or may not be significant
A 20. 0 mL sample of glycerol has a mass of 25. 8 grams. What is the density of glycerol in ounces/quart
Glycerol density in ounces/quart for a 20.0 mL sample with a mass of 25.8 grams is 42.57 ounces/quart.
What is density?The density of a substance is defined as its mass per unit volume. The Latin letter D can also be used in place of the most commonly used density symbol. Density is defined mathematically as mass divided by volume. The density of something indicates how heavy it is in relation to its size. When an object has a higher density than water, it sinks; when it has a lower density, it floats. The density of a substance is a property that exists regardless of its volume. The density of an object is calculated by dividing its mass by its volume. The density unit of measurement is grams per cubic centimeter (g/cm3).
Here,
density=mass/volume
=25.8/20
=1.29 g/ml
the density of glycerol in ounces/quart,
=1.29*33
=42.57 ounces/quart
The density of glycerol in ounces/quart for 20. 0 mL sample of glycerol that has a mass of 25. 8 grams is 42.57 ounces/quart.
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Which statement correctly explains the rise of liquid in the tube at the end of the experiment?
Answer:
A
Explanation:
A
The element that corresponds to the electron configuration 1s22s22p63s23p64s13d5 is Cr. For the three ions formed by this element, 2+, 3+ and 6+ charged respectively, write the electron configuration and explain the property of paramagnetism or diamagnetism for each species.
Due to the unpaired electrons, it is paramagnetic. Because it has 3 unpaired electrons (4-152 252 2pt 332 3p 3d), it is paramagnetic. For G2+, all electrons are coupled (132 257 24us$ 752 3p 30).
What does chemistry mean by paramagnetic?The presence of a dipole moment magnetic in an unpaired electron causes paramagnetism. According to QED, an electron's magnetic moment results from its orbital motion and spin characteristics, giving it quantum-style angular momentum.
Why are bonds paramagnetic?The majority of atoms with partially filled orbitals are paramagnetic due to the existence of unpaired electrons within the material, while there are some outliers like copper. Unpaired electrons have such a magnetic magnetic dipole because of their spin, which makes them behave like small magnets.
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which aqueous solution is expected to have a ph less than 7 at 25∘c?
In given aqueous solutions NH₄Br is the acidic solution is having pH less than 7.
What does aqueous solution mean?When liquid water serves as the solvent, the result is an aqueous solution. That is, water molecules encircle and incorporate solute (dissolved) ions and molecules into the web of bonds in the water. The dissolved species subsequently dispersed all over the water.
Water with one or more dissolved substances is known as an aqueous solution. An aqueous solution can contain dissolved gases, solids, or other liquids. A mixture must be stable in order to be a true solution.
Strong acid and weak base compounds will hydrolyze in water to produce an acidic medium (pH less than 7)
Only NH₄Br of these will result in an acidic solution as:
NH₄Br + H₂O → NH₄OH (weak base) + HBr (strong acid)
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Answer:the plants received more sunlight
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