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Q: What is meant by the term “chemical equilibrium”? Must amounts of reactants and products be equal at...

A: Many types of reactions are studied in chemistry. One of them is a reversible reaction. These reacti...

Q: The equilibrium constant K. for the reaction H2(g) + Br2(g) == 2HB1(g) is 2.18 × 10® at 730°C. Start...

A: Given: A reversible reaction of HBr at 730°C which initially contains 3.20 mol HBr in a 12.0 L vesse...

Q: 9. You want to add PMA to 9 mL of HL-60 cells so that you have a concentration of 12 nM. Your stock ...

A: The given problem relates to stock dilution, so we can use the below relation to calculate the volum...

Q: 2. (a) Provide the structure of the product of the following reaction for preparation of an alcohol....

A: Since it is a tertiary carbon the carbonation formed in this case will be highly stable due to induc...

Q: Which type of light has the shortest wavelength? Visible Radio Waves Ultraviolet Infrared O Microwav...

A: Electromagnetic waves are those waves which are formed by the perpendicular vibrations in electric a...

Q: How long will it take for the concentration of A to decrease from 0.500 M to 0.165 M in the first-or...

A: Final answer : 1.386 sec

Q: Chemistry Question

A: We know that , 6.023×1023 molecules of H2O=1 moles of H2O.                   1 molecule of H2O =16.0...

Q: Predict the chromatogram of the product against benzophenone by TLC on silica gel using a 4: 1 mixtu...

A: The chromatogram is a diagrammatic way to represent the separation of the individual compounds of th...

Q: The reaction A + 2B EC has the following proposed mechanism: Step 1: A +B 77 D (fast equilibrium) St...

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Q: #16

A: Valence electrons :-  The number of electrons present in outermost shell of an atom are called valen...

Q: Mcq help ASAP!

A: In the given reaction KClO3 decomposes into KCl and O2. The equation for the balanced chemical react...

Q: A student working in the lab is trying to identify an unknown substance to see if it matches a subst...

A: Given Data - mass of the object, m         = 88.73 g  density of the substance, d = 5.76 g/mL Volum...

Q: Consider the equilibrium reaction: AX​3(s) ⇌ A​3+(aq) + 3X​-(aq). What is the solubility of AX3 (MM ...

A: Given data, Molar mass of AX3=78.0 g/mol Ksp = 1.0 × 10-33 The balanced chemical equation is, AX​3(s...

Q: You have 6 mL of cells you need to treat with Hydrogen Peroxide (H2O2), such that the final concentr...

A: A question based on volumetric analysis for which the required volume of H2O2 from the stock is to b...

Q: Chemistry practice question

A: Alkenes are the organic compounds which contains at least one double bond in it.

Q: Atoms of which pair of elements will form metallic bonds in a compound

A: Metallic bonding have seen in between metal atoms.Instead of a bond between just two atoms, a Metall...

Q: (a) What compound precipitates when aqueous solutions of Fe2(SO4)3 and LiOH are mixed? (b) Write a b...

A: When two compound are mixed the cation of one compound combined with anion of another then there wil...

Q: 12C

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Q: 1. Potassium hydroxide (KOH) is a strong base in aqueous solution. Give the pH of a KOH solution wit...

A:     1. Given that: concentration of OH-,  [OH-] = 4 x 10-3 M  

Q: What is meant by pauli’s exclusion principle?

A: A question about Pauli's exclusion principle.

Q: (a) What compound precipitates when aqueous solutions of Fe2(SO4)3 and LiOH are mixed? (b) Write a b...

A: a) The compound precipitates when aqueous solutions of Fe2(SO4)3 and LiOH are mixed Fe(OH)3

Q: Chemistry practice question

A: The given reactant is 3-methylhexane.

Q: 1. The reaction I (g) + OCI (g) 2 IO (aq) + CI (aq) was studied and the following data was obtained:...

A: To solve this problem first we have to consider a rate law and according to the date given in the ta...

Q: Illustrate the differences between stereoisomers and conformations in a 1,3-diene: ?

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Q: Predict the structural formula of the major product of the reaction of 2,2,3-trimethyloxirane with  ...

A: The reaction between  2,2,3-trimethyloxirane and ) Me2NH gives hydroxyl amines  Dimethylamine will a...

Q: Air bags inflate from the decomposition of sodium azide: 2 NaN3 --> 2 Na + 3 N2 What mass of sodi...

A: The ideal gas equation is  PV = nRT P = Pressure  V = volume n = moles of gas R = gas const = 0.0821...

Q: Draw the products of each reaction, and state whether the reaction is fasteror slower than a similar...

A: The products of the above reaction and the reaction is faster or slower than a similar reaction with...

Q: What is the entropy when 1.53 moles of CCl,F2 vaporize at 25°C? [AH(vap) = 17.2 kJ/mol at 25°C]

A: Number of moles of CCl2F2, ∆H(vap) and the temperature for which entropy is to be determined.

Q: Boron, atomic number 5, occurs naturally as two isotopes, 10B and 11B, with natural abundances of 19...

A: Isotopes are the atoms of the same element which has same atomic number but different mass number. T...

Q: What volume of a 1.00-M Fe(NO3)3 solution can be diluted to prepare 1.00 L of a solution with a conc...

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Q: 2) What kind of changes are observed in UV spectrum after reactions occured? Which types of electron...

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you ar...

Q: Chemistry practice question

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Q: What are the Exceptions to the Octet Rule ?

A: The octet rule is a chemical basic rule that illustrates the idea that the major group elements appe...

Q: How much heat, in units of Joules, is needed to warm 647.2 g of copper from 40 °C to 82 °C? The spec...

A: q = mc∆T q = heat  m = mass of copper  c = specific heat of copper  ∆T = change in temperature      

Q: Be sure to answer all parts. For the reaction     A(g) + B(g) + C(g)  →  D(g)  The following data we...

A: Assume the order of the reaction with respect to [A], [B] and [C] is a, b and c, respectively. The r...

Q: Which of the following species would have the highest nucleophilicity parameter npt- Select one: O P...

A: Nucleophilicity depends on the availability of an electron to donate. If the negative charge is tigh...

Q: In a combustion operation, anthracite used showed 92.8% C and 1.3% ash. If this coal is burned in dr...

A: Anthracite is high rank coal Caol is 92.8% C and 1.3% ash Ash is non combustible The reactions occur...

Q: Honey consists of fructose, or fruit sugar, supersaturated in water made by bees.  Eventually, the s...

A: When the crystals of any compound are impure due to any reason. They can be recrystallized by the me...

Q: A piece of silver metal weighing 194.3 g is placed in a graduated cylinder containing 242.0 mL of wa...

A: Density = mass/volume  Mass of metal = 194.3 g  Volume of metal can be calculated from initial and f...

Q: Chemistry practice question

A: Solution Nitrogen nearly incorporates a placoid structure in aromatic amines (“anilines”). this can ...

Q: #41

A: 1. The ground state configuration is the lowest energy and most stable arrangement. 2. The natural s...

Q: Melting point is incorrect

A: Physical change: In a physical change the physical state of matter changes. In this change different...

Q: Give a chemical test to distinguish between C2H5Br and C6H5Br.

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Q: What is the concentration of A after 37.7 minutes for the zero order reaction A → Products when the ...

A: The rate of the zero-order reaction does not depend on the concentration of the reactant. Hence the ...

Q: A sample of an iron ore is dissolved in acid, and the iron is converted to Fe2+. The sample is then ...

A: (a) Given, volume of MnO4- = 47.20 mL Molarity = 0.00240 mol/L So, Number of moles of MnO4-=Molarity...

Q: 10. Which mechanism is going to produce a faster reaction? Explain. Mechanism 2 Mechanism 1 STEP 1 N...

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Q: We submerge a 2.85-g lead weight, initially at 10.3°C, in 7.55 gof water at 52.3°C in an insulated c...

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Q: Make a model of each compound, draw it in its most symmetric conformation, and determine whether it ...

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Q: Give a common name (when possible) and a systematic name for each compound.  CH3CH2OCH(CH3)2

A: Introduction: IUPAC nomenclature: IUPAC stands for International Union of Pure and Applied Chemistry...

Q: When 1.921 grams of sucrose (Molar mass 342.3 g/mol) is burned in a bomb calorimeter, the temperatur...

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.