WHICH OF THE FOLLOWNG PHYSICAL PROCESSES IS EXOTHERMIC? A. BOILING OF WATER B. MELTING OF ICE C.EVAPORATION OF ALCOHOL D.CONDENSATION OF WATER

Q: The addition of 3.15 g of Ba(OH)2 · 8H2O to a solution of 1.52 g of NH4SCN in 100 g of water in a ca...

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next ...

Q: 2. Draw a molecule with the molecular formula CŞH100 that would have the following peak(s) in it spe...

A: C5H10O

Q: interconversion of energy between two forms: heat alu 13. The First Law of Thermodynamics states tha...

A: 13.  The First Law of Thermodynamics states that energy can be created or destroyed. Answer :  The F...

Q: Which of the following describes an electrolytic cell? The energy is transformed from chemical to el...

A:                                     Answer An electrolytic cell electrical energy convert into chemi...

Q: The AG°rxn for the reaction: N2(g) + O2(g) 2 NO(g) is +173 kJ/mol at 25 °C. What is the equilibrium ...

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Q: 3. Find the molar absorptivity Concentration Measured coefficient, the R? assuming that the path len...

A: To find out molar absorptivity, first draw the graph for given data and then solve all the questions...

Q: In a reaction where a carboxylic ester and water react to produce an alcohol and a carboxylic acid a...

A:                           Answer  In a reaction where a carboxylic ester and water react to produce ...

Q: Which of the following is the best option for transferring 20 mL of a solution? A Use a 10 mL Mohr p...

A: Correct option C 

Q: Francis A. Santos Which of the following chemical grades are specially manufactured, have exceptiona...

A: Which of the following chemical grades are specially manufactured, have exceptional purity and used ...

Q: 4. Propose a structure for a compound with the following H1 NMR spectra. Match each signal with the ...

A: IR spectroscopy is an important tool for the determination of the functional group in the compound. ...

Q: Question 9 The pressure of the atmosphere on the surface of the planet Venus is about 88.8 atm. How ...

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Gaseous ethane (CH, CH,) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,)...

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Q: Part A Propose a mechanism for the following reaction CH CH

A: The mechanism can be shown as:  

Q: 5. Determine the concentration in mol/L (M) of a solution of 18.25 g of HCl in 250.0 mL of water and...

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Q: The following problem requires TWO reaction steps in a row. 1. Starting with the given substrate an...

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Q: P3- ion is a linear ion composed of 3 phosphorus atoms. Draw 3 resonance structures of this ion. Sho...

A: Resonance structure:If the Lewis structure of a molecule or ion cannot explain by a single structure...

Q: Question 4 What is the purpose of the salt bridge in an electrochemical cell? To maintain electroneu...

A: This question is related to electrochemistry. Electrochemistry is branch of chemistry in which oxida...

Q: Which of the following is the best option for transferring 20 mL of a solution?  Use a 20 mL Mohr p...

A: Answer: Different type equipment made of glass are used in the chemical laboratory  known as glasswa...

Q: Use these bonds and atoms to do the following: 1. Construct a model of methane. Write down its dash ...

A: Since you have asked multiple questions, we will answer the first one for you. To get the remaining ...

Q: Describe the four types of information that is provided by a H1 NMR spectra.

A: The information we get from the 1H NMR are discussed as : 1) The number of signal sets      The num...

Q: Gaseous butane (CH, (CH,) CH, will react with gaseous oxygen (O2) to produce gaseous carbon dioxide ...

A: Solution-

Q: Given the stock solution (0.019 M) and diluted solution (0.013M) can you help me compute with How m...

A: Step 1 Stock solution of 0.019 M ascorbic acid To find :-  Amount of water needed to make the solut...

Q: Givev Clea handwritten answer asap....

A: We have to answer that which of the following elements is a very reactive metal (has to be stored un...

Q: Which of the following statements is true? A Liquids can be weighed using a weighing paper. B In wei...

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Q: 15.0 L of an ideal gas at 298 K and 3.36 bar are heated to 350 K with a new pressure of 3.80 bar. Wh...

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Q: The standard cell potential for the reaction at 298.15 K: Fe (s) + Zn2+ (aq) ⇋ Fe2+ (aq) + Zn (s) ...

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Q: I. Directions: Draw the lewis structures of the neutral atom and the ion of each element. Determine ...

A: Lewis’s structure: Lewis’s bonding theory is based on the octet rule. The Lewis structure is a simpl...

Q: Determine the concentration of 7.13 g zinc nitrate (MW = 189.4 g/mol) dissolved in 200.0 mL distille...

A: Given, Weight of zinc nitrate = 7.13 g Molecular weight (MW) of zinc nitrate = 189.4 g/mol Volume of...

Q: Which of the following is not a way of expressing data reliability:   Statistical Tests   Sampling...

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: 2. -3 9. Gaseous butane (CH, (CH,) CH, will react with gaseous oxygen (0,) to produce gaseous carbon...

A: Given Data :  1. Mass of butane = 4.65 g  2. Mass of oxygen = 25 g   

Q: The balanced chemical equation and rate law for the reaction between NO(g) and H2(g) at a particular...

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Q: (SPM10-29] Which equations represent double decomposition reactions that form a precipitate? Na So. ...

A: Given reactions are : I. CuSO4 + Na2CO3 -------> CuCO3 + Na2SO4  II. CuSO4 + Mg(NO3)2 ------->...

Q: 2.) Formamide decomposes at high temperature. (a) If 0.186 mole of formamide (HCONH2) dissociates in...

A: The equilibrium reaction given is, a) Given: Moles of HCONH2 taken = 0.186 mol. Volume of flask = 2...

Q: Nitrogen dioxide decomposes according to the reaction: 2 NO2(g)  2 NO(g) + O2(g); Kp = 4.48 x 10-13 ...

A: Please find your solution below : Chemical equilibrium is a state in which there is no change in amo...

Q: For the reaction 2HI(g) H2(g) + 12(g), K = 0.290 at 400 R. If the initial %3D concentrations of HI, ...

A: We have to predict the nature of reaction and Correct statement.  

Q: The acid H2CO3 decomposes to some extent in water to produce CO2  gas. What should you expect to obs...

A: The answer is as follows:  

Q: Use the information below to answer the following question: C2H2(g)+ 5 O2lg)→ 4 CO2(g)+2 H2O(g) + 25...

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Q: Given the chemical reaction 4 Fe + 3 O₂ + 6 H₂O → 2 Fe₂O₃.3 H₂O which is reduced?

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Q: While not true in general, many aqueous reactions approximately double their rate for an increase in...

A: Answer: Arrhenius equation can be used to calculate the activation energy. 

Q: At 400 K, an equilibrium mixture of H2, 12, and HI consists of 0.065 mol H2, 0.079 mol 12, and 0.13 ...

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Q: What is the percent by mass of oxygen in aspirin (C₉H₈O₄)?

A: The molecular weight of aspirin (C9H8O4) is  (12×9+1×8+16×4)=180 gm/mol The oxygen present in aspiri...

Q: Solve the problem: 1. Find the freezing pt. & boiling pt. of a solution containing 4.0 g sucrose (C1...

A: Given,  Mass of sucrose = 4.0 g  Mass of water = 200 g  Molal boiling point constant of water = Kb =...

Q: Which of the following is/are true concerning a chemical reaction at equilibrium? 1. The system will...

A: Reversible reaction: The chemical reaction in which the products can react to reform the reactants. ...

Q: Question 47 How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M Cu...

A: The correct option would be:  

Q: Which of the following is the best option for transferring 20 mL of a solution? A Use a 5mL serologi...

A: The transfer of liquids and solution uses various types of apparatus and instruments depending on th...

Q: The Tietjen and Moore paper gives the following set of 8 mass spectrometer measurements on a uranium...

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Q: Question 45 A chemist obtained the following data for the percent compound Z in triplicates (n=3) of...

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Q: Other things being equal, the margin of error of a confidence interval increases as A the confidence...

A: The margin of error, also known as the confidence interval, indicates how closely your survey result...

Q: Which of the following CANNOT be found in a safety data sheet of a chemical? (A Hazard Identificatio...

A: Safety data sheets in the laboratory contains useful informations about the identification of hazard...

Q: Phosphorus and bromine react to form phosphorus tribromide, like this: PĄ(9) + 6 Br,(9) → 4 PB13(9) ...

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.