Define the following terms thoroughly: Atomic number Mass number Isotopes

Q: Calculate the report the volumes of weak acid, conjugate base and distilled water need to prepare yo...

A: Solution: The buffer: Acetic acid (CH3COOH) and Sodium acetate (NaCH3COO).The (CH3COOH) is weak acid...

Q: A supersaturated solution of KNO3 is made by dissolving the solute in 100 g of water at 60ºC and the...

A: A solution is prepared by homogenous mixing of solute and solvent. An aqueous solution is formed by ...

Q: 2. In an ethanol production plant, a separator produces a 99% ethanol product from a feedstock strea...

A: Given:-   The mass flow rate of feedstock stream mF = 450 lb/min   Mass fraction of ethanol in feed ...

Q: e theoretical yield a

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Q: A metal crystallizes with HCP unit cell. Its density is 8.67 g/cm3 and atomic weight of 111.95 g/mol...

A:

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gas...

A:

Q: Acrolein test

A: The acrolein test is used to determine if oil or fat is present. When oil or fat is heated in the pr...

Q: formula NISO,•XH2O? 4

A:

Q: I. Both water and carbon dioxide are triatomic molecules with similar formulas. Explain why one of t...

A: Polar molecules: these are the molecules in which one end is slightly positive and the other end is ...

Q: In what phase is the substance at 50 °C and 1 atm pressure? P (atm) 1 . 10 20 30 40 50 60 70 T(deg. ...

A: Solution                      Given that what phase is the substance at 50 °C and 1 atm pressure = ...

Q: Forming Ba(I03)2, 500 mL of 0.5000 M Ba(NO3)2 was mixed with 500 mL of 0.0500 M NaIO3.   Ksp=1.57x...

A: Here first of all we will determine the limiting reagent by calculating number of moles of each reac...

Q: Calculate q, AH and AU for the process during which 2 mol NO2 is heated at a constant pressure of 1 ...

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Q: Which of the following statements is false? A) Racemic mixtures are optically inactive. B) Enantiome...

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Q: is used to understand the concept of energy conservation. a. First Law of Thermodynamics b. Second L...

A: Which one is correct

Q: The synthes is of Cocle is an exo the rmic process ? endothermic

A: When 1 mole of CO(g) reacts with Cl2(g) to form COCl2(g) according to the following equation, In thi...

Q: What is the relationship between the strength of an acid/base and its conjugate? directly propo...

A: The acid are the compound which provides hydrogen ions or accept electron. However, base will accept...

Q: How do I do the calculation(s) here to determine the information I will need to enter/graph in Excel...

A: The species diagram represents the variation of concentration of different species in a system, with...

Q: 7. A solution was made by mixing 50.0 mL of 0.750 M HCN with 25.0 mL of water. What is the pH of thi...

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Q: I. BOILING POINT ELEVATION: The temperature of a boiling 50 mL of distilled water in an Erlenmeyer f...

A: When a non-volatile solute is added to a solvent the boiling point of the resultant solution is alwa...

Q: (a) Cyclohexa-1,3-diene can be converted into a tetrasubstituted haloalkane when reacted with bromin...

A:

Q: Supposed the reaction: X(s) + 2Y(g) → Z(l) is exothermic. At what temperatures is it spontaneous? a...

A: For the reaction., X(s) + 2Y(g) → Z(l)  

Q: OH CH3 Но CH3 H. H Vs ОН -H- HO. vs НО H- HO- H `CH3 CH3 CH3 Et

A: Isomers: are defined as molecules having same molecular formula and same number of atoms but distinc...

Q: At 25 °C the vapour pressure of ethanol, C2H5OH, is 0.08 atm. What is vapour pressure of a solution ...

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Q: You need to prepare 2 methanol solutions for lab today: 300mL of 50% (v/v) methanol and 200mL of 25%...

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Q: draw the condensed and line bond structure of the compound

A: Bond line formula- A representation of molecular structure in which covalent bonds are represented w...

Q: Nitrogen monoxide and water react to form ammonia and oxygen, like this: 4 NO(g)+6H,0(g) → 4 NH3(g)+...

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Q: 4) bromocyclobutane (Br-, Bromo branch)

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Q: ne Diubility of which salt could be decrease g by the additio O NaCI O PbCl2 О КОН LICI O KNO3

A: The solubility of which salt could be decreased by adding KCl :

Q: A catalyst: a. changes the equilibrium concentration of the products. b. always increases the activa...

A:                                 Answer A catalyst effect the both reaction forward reaction and back...

Q: You need to make 500 mL of a 0.20 M KCl solution. How many grams of KCl do you need?

A:

Q: A sample of mixture of CaCO3(s) decomposed: CACO3(9) CaO(s) Сао, + 2NaHCO3(s) Na,C

A:

Q: heat flows out of the flask and into the bath. Calculate the new temperature of the water bath. You ...

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Q: You are handed a 15.85% by mass aqueous KCl (m.m. = 74.5513 g mol–1) solution (at 25 °C). Assume the...

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Q: How much KBr could dissolve in 50 g of H2O at 70ºC?

A: Solution is mainly of three types:-  Unsaturated solution  Saturated solution  Supersaturated soluti...

Q: Calculate the Amax of the efhanolic solufion of the following compound.

A: 273 nm is the answer.

Q: A reaction is found to be first-order with a rate constant of 0.00125 s–1. If the reaction initially...

A: Given,  Rate constant, k = 0.00125 s-1  Initial concentration, [A]0 = 0.25 M  Final concentration [A...

Q: In order to form Ba(IO3)2, 500 mL of 0.5000 M Ba(NO3)2 was mixed with 500 mL of 0.0500 M NaIO3.   ...

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Q: which is in th7 place in 115.87

A: The correct answer is given below

Q: A sample of gas contains 0.1100 mol of CH4(g) and 0.2200 mol of 02(g) and occupies a volume of 14.5 ...

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Q: A compound was discovered whose composition by mass is 85.6% C and 14.4% H. Which of these formulas ...

A:

Q: How many molecules are in 156 g of aluminum sulfate? 1. 2. What is the mass of 5.36 x 102² molecules...

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Q: Form the B to C by reagent and reaction missing! (ONLY USE ALKYLATION NOT

A: The answer is as follows:  

Q: A sample of polystyrene, which has a specific heat capacity of 1.880 J-g .°c', is put into a calorim...

A: Given data,Specific heat capacity of polystyrene=1.880J.g-1.oC-1Mass of water=250.0gInitial temperat...

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

A:

Q: What is electronegativity?

A: The tendency to attract shared pair of electron is called electronegativity.  Fluorine is most elect...

Q: Measurements show that the energy of a mixture of gaseous reactants decreases by 249. kJ during a ce...

A:

Q: Suppose a 500. mL flask is filled with 0.40 mol of N, and 0.90 mol of NH3. This reaction becomes pos...

A:     volume of flask = 500 mL Initial moles of N2 and NH3 are 0.40 and 0.90 moles respectively.

Q: Compound Draw in skeletal form (1 as the highest BP and 4 as the lowest SKELATAL/BOND-LINE FORM BP) ...

A: The boiling points of alkanes increase with increasing number of carbons.  the boiling point of an a...

Q: Question 7 At constant T and n, the pressure of a gas can be doubled by:

A: we know the ideal gas equation, PV = nRT R is the gas constant

Q: The pH of Ca(OH)2(s), a sparingly soluble salt, is 12.45. Calculate the solubility product of Ca(OH)...

A: Given data :  For 1st question :  pH of CA(OH)2 = 12.45  For 2nd question :  Ksp  = 9.8×10-9   

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.