When a pure liquid freezes to form a pure solid A. Delta H is negative B. Delta H is positive OC. Heat is absorbed from the surroundings D. Both B and Care correct

Q: Give an IUPAC name for the compound below. Accepted names for branched alkyl groups are isopropyl,…

A: we have to determine the IUPAC name of the given structures

Q: 3. The reaction that occurred in the first fusion bomb was Li+ proton---X+a. Write the complete…

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Q: long chains of nucleotides. A nucleotide consists of a sugar molecule (either ribose in RNA or…

A: Bases in DNA: Adenine, Guanine, Cytosine and Thymine Bases in RNA: Adenine, Guanine, Cytosine and…

Q: The H₂O molecule is an asymmetric rotor with rotational constants 27.877 cm¹¹, 14.512 cm³¹, and…

A: Given a physical problems on rotational partition function having some value of rotational constant.…

Q: Consider these compounds: A. Mn(OH)2 B. ZnS C. Mg(OH)2 D. AgOH

A: The solubility of a compound is determined by its solubility product constant (Ksp). The Ksp is a…

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Q: Define the following 1.Aufbau Principle 2. Hund's Rule 3. Electron Configuration 4.Ground State…

A: Periodic Table - It is also called as periodic table of element in which elements are arranged…

Q: A gaseous mixture with a molar analysis of 20% CO2, 40% CO, and 40% O₂ enters a heat exchanger and…

A: Given , Gaseous mixture of 20 % CO2 , 40 % CO , 40% O2

Q: Question 2 Which reaction is an oxidation-reduction reaction? MgCl2(aq) + H2(g) OA. 2 HCl(aq) +…

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Q: Calculate the heat of the reaction, in kJ, using the standard enthalpies of formation provided.…

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Q: 22. Which of the following is FALSE with regard to acid strength? A) B) C) D) E) HCIO3 > HCIO₂ H₂SO3…

A: The strength of the acid can be determined by the stability of the conjugate base after the donation…

Q: Which of the following correctly describe the shape of the molecule or ion?

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Q: An electrochemical cell is based on the following two half-reactions: oxidation: Sn (s) →Sn²+ (aq,…

A: Electrochemical cell- In an electrolytic cell, chemical reactions are sped up by electrical energy.…

Q: When using a 0.100 M HCI (aq) standard solution and measuring 50 ml of 0.100 M NH3 (aq), Find the pH…

A: Given , Concentration of HCI = 0.1 M Concentration of NH3= 01. M Volume of NH3= 50.0 mL pKb(of…

Q: QUESTION 17 Ozone, O3, is represented by two resonance structures: -0-0 Which statement correctly…

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Q: 0.8- 0.6- 0.4- 0.2 0.0 3000 INFRARED SPECTRUM 2000 Wavenumber (cm-1) 1000

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Q: How many moles of NaHCO3 are in a 2.00 g sample ? A. 0.0238 OB. 0.0119 OC. 0.0200 OD. 2.00

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Q: 2 MnO2 (s) + 3 H+(aq) + N2H5+(aq) → 2 Mn2+(aq) + 4 H2O (l) + N2 (g) In the reaction above what…

A: When there is increase in oxidation state, process is known as oxidation. If there is decrease in…

Q: which of these is not the vibration band? a) 3500 cm¹ (Broad) b) 3000-3100 cm-1 c) 2850-3000 cm-¹ d)…

A: The correct answer is (a) 3500 cm¹ (Broad).   A molecule's vibrational bands in infrared…

Q: CH4(g) + 2Cl2(g)  CCl4(g) + 2H2(g) Which of these are true for the reaction above? Check all that…

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Q: Write a balanced equation for the reaction of solutions of lead (IV) nitrate with sodium sulfate to…

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Q: Which of the following is a resonance structure of I? 1 I 2

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Q: In the electrochemical cell Cd|Cd+2||Al3+|Al it is fulfilled that: a) Cadmium is oxidizing and…

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Q: Room temperature is typically around 72.0 °F. Convert this temperature to degrees Celcius. A. 40.0…

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Q: Which of the following measurements corresponds to met- ric Ruler B shown in Figure PSS.2? (a) 2.0…

A: The given measurements are 2.0 cm, 2.00 cm, 2.05 cm and 0.5 cm.

Q: Consider the following half-reactions: (1) The strongest oxidizing agent is: (2) The weakest…

A: Consider the following half-reactions: (1) The strongest oxidizing agent is: (2) The weakest…

Q: Fe2O3(s) + 2Al(s)Al2O3(s) + 2Fe(s) Using standard thermodynamic data at 298K, calculate the free…

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Q: A scientist needed to determine the concentration of a sodium hydroxide solution. To do this, they…

A: 1) Given :-    Average volume of Acid (Titer) = ?  -------------------------------------------

Q: Assign R/S to the following organic compounds then give its IUPAC Nomenclature

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Q: What is the best description of the following electron transition in the hydrogen atom? Transition:…

A: When a photon is absorbed by an electron of hydrogen atom, the electron moves from lower energy…

Q: 200 ml of 2.4 M KOH solution was diluted to 600 ml. What is the Molarity of the KOh solution after…

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Q: Does the following reaction absorb or release energy? (1) Cr(g) + e → Cr (g) Is it possible to…

A: Given reaction is Cr + e -----> Cr-

Q: What volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCl to achieve a pH of 8.00? The…

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Q: Drag the labels to the correct position to indicate the contents in each of the separating funnel…

A: Given two separating funnel having two separated layer in both the funnel, We have to write which…

Q: explain

A: Correct answers:   ---->directly proportional to the distance between the bonded atoms ---->a…

Q: Through acid hydrolysis for 24 hours, Jackson obtained the following amino aci residues:…

A: Given that, a polypeptide through acid hydrolysis for 24 hours, gives the below given amino acid…

Q: For the reaction H2S(g) + |2(s) = 2H1(g) + S(s, rhombic) Kp = 1.33 x 10-5 atm at 60°C. What will be…

A: Well, we will first construct the ICE table. And we will calculate the mole fraction from that. We…

Q: This is a tale about Algernon the Organic Chemist. In his laboratory one night, Algernon attempted…

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Q: Indicate whether each of the following is acidic, basic, or neutral. Drag the appropriate solution…

A: For an aqueous solution, we know that the production of the concentration of the hydronium ions and…

Q: Name the following compounds  N2O (Nitrous Oxide is not correct ) C2H6 (ethanol is not correct)

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Q: Consider the reaction shown below between hydroxide ions (OH-), hypochlorite ions (ClO-), and…

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Q: 11 10 8 7 5 3 2

A: IHD = (2C + 2 + N - X - H)/2 IHD = Index of hydrogen deficiency = (Number of pi bond + number of…

Q: Which alkyl halide (s) would give the following alkene as the only product of an elimination…

A: In elimination reaction of alkyl halide,  one molecule of HX eliminated in presence of base to form…

Q: The accepted mechanism for a rearrangement reaction is shown below. "Q Ph Ph Ph OH Ph J L G Ph Ph HO…

A:

Q: Consider the following equilibrium reaction: H₂O + H₂O H₂O* + OH¯ When Sr(OH)2 is added, the…

A: Given , Reaction : H2O + H2O ⇌ H3O+ +OH-

Q: 8.Thermodynamics Score: 0/20 0/14 answered Question 1 Y The process of burning gas is (endothermic,…

A: The correct option is Exothermic and Spontaneous. The burning of natural gas is produce heat . Any…

Q: X. :Y: What is the formula when X and Y form an ionic compound? byt 1234567890 123456

A: The Lewis symbols of the elements are The formula of the ionic compound formed from X and Y is

Q: Calculate the emf of the following concentration cell at 25oC:  Ag(s)|Ag+(0.12 M)||Ag+(1.9 M)|Ag(s)

A:

Q: Phosphorus pentachloride, PCIs, a white solid that has a pungent, unpleasant odor, is used as a…

A: mole is equal to weight of substance divide by it's molar mass

Q: Consider the phase transformation HgS(s, red) = HgS(s, black) AG = 4,180-5.44T,J 1) Determine the…

A:

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.