true or false enthalpy is characteristic of each substance varies with the presence of impurities

Q: or each of the following sets of compounds, identify which compound would react more rapidly in the…

A: Sn1 : Follow first order kinetics. Proceed through a carbocation intermediate. Good leaving group…

Q: The first-order decomposition of a colored chemical species, X, into colorless products is monitored…

A: Lambert beer's law Absorbance=Ecl

Q: Describe the basic differences between fundamental vibrations and overtones in IR spectroscopy.

A: Fundamental Vibration : Fundamental vibration occur when a vibrational mode is excited from v=0 to…

Q: Why NaH or LiH are not used as reducing agents? What is their reactivity instead? Explain

A: Sodium hydride and Lithium hydride both acts as a reducing agent but they are not generally used for…

Q: heated. Mg3 N₂ (s) 53 2 What volume decimal place.

A:

Q: What is the Volume (in L) in a cylinder filled with 23.0 g of N2 gas at a Temperature of 65°C and a…

A:

Q: Draw the starting material needed to complete this reaction. Ignore inorganic byproducts. Select to…

A:

Q: What do the coefficients of a balanced chemical equation represent? Number of moles of molecules in…

A: Balanced chemical equation is one in which number of atoms on both side of equation are equal. In…

Q: When 13.1 g of Na and 11.7 g of Cl2 react, what is the mass, in grams, of NaCl that is produced?…

A: Given, 2Na(s) + Cl2(g)→2NaCl(s) mass of Na reacts = 13.1 g mass of Cl2 reacts = 11.7 g Note:  molar…

Q: What quantity of heat (in kJ) will be released if 1.20 mol of SrO is mixed with 0.631 mol of CO₂ in…

A:

Q: 5. Light waves slowing down through medium to form a rainbow a.) Reflection b.) Refraction c.)…

A:

Q: 13.11 How many ¹H-NMR signals would you expect to see for this compound?

A: In order to find 1H- NMR signal ,we have to see how many protons are present in different…

Q: STARTING AMOUNT X What is the mass in grams of KBr in 0.400 L of a 0.350 M solution? ADD FACTOR x( )…

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Q: Which of the molecules below has a dipole moment?

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Q: Convert the Fischer projection to the Haworth projection of the a-furanose form by moving the…

A: For the conversion of Fischer projection to Haworth projection we use the following steps of…

Q: If the rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of N₂? *N_)+…

A: Which one of the following is correct

Q: Fill in the name and empirical formula of each ionic compound that could be formed from the ions in…

A:

Q: When 3.5 g of CaF2 (an insoluble salt, Ksp = 3.9 X 10-11) is added to water to make 200. mL of…

A: mole  = mass  /  molecular weight molecular weight of CaF2 = 78.07 g/mole concentration = mole  *…

Q: How much heat (in kJ) is required to vaporize a 3.86-g ice cube at -20 oC? The heat of fusion of ice…

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Q: Name the three alkenes using system H3C CH3 A. H3C с =c C H The name of compound A is:

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Q: Which bond, below, is most polar? O OF O O NF O OH CO CF O HF CH

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Q: A latex balloon has a volume of 3.00 L at 298 K. To what volume (in L) will the balloon expand if it…

A: Given that, a latex ballon having The initial volume is V1 = 3.00 L, The initial temperature is T1 =…

Q: Consider the balanced thermochemical equation given below: 4 NH3(g) + 5 02(g) -* 4 NO(g) + 6 H20(g)…

A:

Q: Is disaccharide “4” a reducing sugar

A: Reducing and nonreducing sugar: Carbohydrates that contain free aldehyde or ketone groups can act as…

Q: A= Consider the following compounds D-HOCH CH B. E = C = F= a) Which one(s) would give a positive…

A: a) Tollen's test is given by compounds which have aldehyde groups. Out here, the compound A has a…

Q: Find the root-mean-square speed, average speed, and most probable speed of chlorine gas at 225oC?

A: The formulas for root-mean-square speed(Vrms) , average speed(Vavg) , and most probable speed(Vmps)…

Q: In a 6.00 L pressure cooker, water is brought to a boil. If the final temperature is 115 °C at 3.45…

A:

Q: The pK, values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.42. Calculate the pH at each of…

A: Here a dibasic base is titrated with HCl. Let us consider the base to be B.  pkb1 = 2.10 , pkb2=…

Q: 5. Complete the table. SYMBOL 238 92U 89Y 39 # OF PROTONS 20 23 35 15 # OF NEUTRONS 20 28 44 16 # OF…

A: Here we are required to fill the table about proton ,neutron and electron of different element.…

Q: Consider the following thermochemical equations: C(graphite) + 02 (9) -* CO2 (g)  ΔH, rxn = -393.5…

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Q: Which of the following atoms has the smallest first ionization energy? O AI O si OP Os

A: The ionization energy of an element increases across the period because the number of electrons in…

Q: 10. a. In a neutral solution, what is the concentration of H3O+? 1.0 x 10-7 M b. In a neutral…

A: 10. pH of a solution is the negative logarithm of hydronium ion concentration.

Q: s) Name the following compounds properly, including stereochemistry H₂C Br _H CH3 15…

A:

Q: Propose a reaction starting material and reagents to prepare diphenyl sulfide in the laboratory.…

A: Diphenyl sulfide is an aryl sulfide that is composed of two phenyl groups joined by a sulphur atom.…

Q: 6. How many milligrams of methylparaben are needed to prepare 8 fluidounces of a solution containing…

A: Fluidounce =29.6 mL. Convert 8 fluidounces into to mL as follows: 8 fluidounces*( 29.6 mL /1…

Q: A lotion vehicle contains 15% w/ of glycerin (sp gr 1.25), How much glycerin should be used in…

A: Given that -  Percentage weight of glycerine = 15%  Specific gravity (sp gr) = 1.25  Volume of…

Q: CARBON, Atomic Number = 6 Energy 4s 4p 3p 2p 3d electron configuration: SODIUM, Atomiumber = 11…

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Q: A 200.0 g tin rod is heated to 178.0 degrees C and then is placed into an insulated vessel…

A:

Q: The first-order reaction A-8 has k-0.210 min 1. If [Alo -0.500 M, how long will it take [A] to equal…

A:

Q: What is a thermonuclear bomb? Group of answer choices A uranium bomb A plutonium bomb A fission bomb…

A: Thermonuclear Bomb :      Thermonuclear bomb is also called hydrogen bomb or H- bomb because

Q: Find the enthalpy of neutralization (in ΔΗ neutralization kJ mol kJ -). Round your answer to 3…

A: Heat Evolved when one gram equivalent of acid is completely neutralized by a base in a dilute…

Q: Give the polarity, melting point, boiling point, solubility, and state at room temperature of the…

A: A molecule is polar when it is unsymmetric and has nonpolar bonds.  The polarity of polar molecules…

Q: Balance the following redox reaction in basic solution.   MnO2(s)+Br2(l)→  MnO−4(aq)+Br−(aq)

A: Balancing of redox reaction means the number of individual atoms in the product side must be equal…

Q: Determine the atomic number of the stable configuration of nuclei with mass number A=167 Answer:

A: The  Mass Number (A) --> 167 Nucleon Number (A) --> 167 Proton Number (Z) --> 68 Neutron…

Q: Find the number of vibrational modes for the following molecules: NH3, CH4, and C₁0Hg.

A:

Q: 60. Potassium Permanganate Tablets 0.2 g Disp. #100 Sig: two tablets in 4 pt of water and use as…

A: The answer to the following question is-

Q: Predict the reagent(s) needed to produce this product(s). 8 O A B с D E 1. OsO4 (catalytic) 2. NMO…

A:

Q: The ideal gas law (PV=nRT) describes the relationship among pressure P. volume V, temperature T, and…

A: Temperature and pressure are linearly related, and if the temperature is on the kelvin scale, then P…

Q: What is the molar solubility of barium oxalate at pH of 8? Ksp=10-6

A: The equation for the dissociation of barium oxalate, BaC2O4(s) is: BaC2O4(s) ⇌ Ba2+(aq) + C2O42-(aq)…

Q: 52. Express each of the following concentra- tions as a ratio strength: (a) 2 mg of active…

A: We know , 1 mg = 1× 10-3 g

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.