Chemical Principles
8th Edition
ISBN: 9781305581982
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Chapter 2, Problem 81AE
A certain element has only two naturally occurring isotopes:one with 18 neutrons and the other with 20 neutrons.The element forms 1-charged ions when in ioniccompounds. Predict the identity of the element. Whatnumber of electrons does the 1-charged ion have?
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When 15.00 mL of 3.00 M NaOH was mixed in a calorimeter with 12.80 mL of 3.00 M HCl, both initially at room temperature (22.00 C), the temperature increased to 29.30 C. The resultant salt solution had a mass of 27.80 g and a specific heat capacity of 3.74 J/Kg. What is heat capacity of the calorimeter (in J/C)? Note: The molar enthalpy of neutralization per mole of HCl is -55.84 kJ/mol.
When 15.00 mL of 3.00 M NaOH was mixed in a calorimeter with 12.80 mL of 3.00 M HCl, both initially at room temperature (22.00 C), the temperature increased to 29.30 C. The resultant salt solution had a mass of 27.80 g and a specific heat capacity of 3.74 J/Kg. What is heat capacity of the calorimeter (in J/C)? Note: The molar enthalpy of neutralization per mole of HCl is -55.84 kJ/mol.
Which experimental number must be initialled by the Lab TA for the first run of Part 1 of the experiment?
a) the heat capacity of the calorimeter
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d) The molarity of the HCl
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Chapter 2 Solutions
Chemical Principles
Ch. 2 - You may have noticed that when water boils, you...Ch. 2 - Which of the following is true about an individual...Ch. 2 - How would you go about finding the number of...Ch. 2 - These questions concern the work of J. J. Thomson:...Ch. 2 - Heat is applied to an ice cube in a closed...Ch. 2 - You have a chemical in a sealed glass container...Ch. 2 - Prob. 7DQCh. 2 - One of the best indications of a useful theory is...Ch. 2 - Prob. 9DQCh. 2 - How does Dalton’s atomic theory account for each...
Ch. 2 - What refinements had to be made in Dalton’s...Ch. 2 - Which (if any) of the following can be determined...Ch. 2 - The average mass of a carbon atom is 12.011....Ch. 2 - Which of the following explain how an ion is...Ch. 2 - Prob. 15DQCh. 2 - Prob. 16DQCh. 2 - Why is calcium dichloride not the correct...Ch. 2 - Explain the law of conservation of mass, the law...Ch. 2 - Prob. 19ECh. 2 - When mixtures of gaseous H2 and gaseous Cl2 react,...Ch. 2 - Observations of the reaction between nitrogen gas...Ch. 2 - Prob. 22ECh. 2 - Hydrazine, ammonia, and hydrogen azide all contain...Ch. 2 - Consider 80.0-g samples of two different compounds...Ch. 2 - Early tables of atomic weights (masses) were...Ch. 2 - What evidence led to the conclusion that cathode...Ch. 2 - Prob. 27ECh. 2 - Prob. 28ECh. 2 - A chemist in a galaxy far, far away performed the...Ch. 2 - Do the proton and the neutron have exactly the...Ch. 2 - Consider Ernest Rutherford’s a-particle...Ch. 2 - Distinguish between the following terms. a....Ch. 2 - What is the distinction between atomic number and...Ch. 2 - Prob. 34ECh. 2 - a. List the noble gas elements. Which of the noble...Ch. 2 - Consider the elements of the carbon family: C, Si,...Ch. 2 - Prob. 37ECh. 2 - The number of protons in an atom determines the...Ch. 2 - For lighter, stable isotopes, the ratio of the...Ch. 2 - For each of the following sets of elements, label...Ch. 2 - Prob. 41ECh. 2 - Write the atomic symbol (ZAX) for each of the...Ch. 2 - Prob. 43ECh. 2 - Prob. 44ECh. 2 - Prob. 45ECh. 2 - Prob. 46ECh. 2 - Would you expect each of the following atoms to...Ch. 2 - Prob. 48ECh. 2 - The compounds AlCl3,CrCl3,andICl3 have similar...Ch. 2 - Each of the following compounds has three...Ch. 2 - Prob. 51ECh. 2 - Prob. 52ECh. 2 - Prob. 53ECh. 2 - Prob. 54ECh. 2 - Prob. 55ECh. 2 - Prob. 56ECh. 2 - Prob. 57ECh. 2 - Prob. 58ECh. 2 - Prob. 59ECh. 2 - Prob. 60ECh. 2 - Prob. 61ECh. 2 - Prob. 62AECh. 2 - Prob. 63AECh. 2 - What discoveries were made by J. J. Thomson,...Ch. 2 - Prob. 65AECh. 2 - Prob. 66AECh. 2 - A sample of chloroform is found to contain 12.0 g...Ch. 2 - In a reaction, 34.0 g of chromium(III) oxide...Ch. 2 - Prob. 69AECh. 2 - Prob. 70AECh. 2 - Prob. 71AECh. 2 - Prob. 72AECh. 2 - Prob. 73AECh. 2 - Prob. 74AECh. 2 - Prob. 75AECh. 2 - Prob. 76AECh. 2 - Prob. 77AECh. 2 - Prob. 78AECh. 2 - Prob. 79AECh. 2 - Identify each of the following elements. a. a...Ch. 2 - A certain element has only two naturally occurring...Ch. 2 - Prob. 82AECh. 2 - Which of the following is(are) correct? a. 40Ca2+...Ch. 2 - Prob. 84AECh. 2 - Prob. 85AECh. 2 - Complete the following table to predict whether...Ch. 2 - Which of the following statements is(are) correct?...Ch. 2 - Prob. 88CPCh. 2 - Each of the statements below is true, but Dalton...Ch. 2 - You take three compounds, each consisting of two...Ch. 2 - Two elements, R and Q, combine to form two...Ch. 2 - A single molecule has a mass of 7.3110223g ....Ch. 2 - A combustion reaction involves the reaction of a...Ch. 2 - You have two distinct gaseous compounds made from...Ch. 2 - You have gone back in time and are working with...
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- When 15.00 mL of 3.00 M NaOH was mixed in a calorimeter with 12.80 mL of 3.00 M HCl, both initially at room temperature (22.00 C), the temperature increased to 29.30 C. The resultant salt solution had a mass of 27.80 g and a specific heat capacity of 3.74 J/Kg. What is heat capacity of the calorimeter (in J/C)? Note: The molar enthalpy of neutralization per mole of HCl is -55.84 kJ/mol.arrow_forwardQ6: Using acetic acid as the acid, write the balanced chemical equation for the protonation of the two bases shown (on the -NH2). Include curved arrows to show the mechanism. O₂N- O₂N. -NH2 -NH2 a) Which of the two Bronsted bases above is the stronger base? Why? b) Identify the conjugate acids and conjugate bases for the reactants. c) Identify the Lewis acids and bases in the reactions.arrow_forwardQ5: For the two reactions below: a) Use curved electron-pushing arrows to show the mechanism for the reaction in the forward direction. Redraw the compounds to explicitly illustrate all bonds that are broken and all bonds that are formed. b) Label Bronsted acids and bases in the left side of the reactions. c) For reaction A, which anionic species is the weakest base? Which neutral compound is the stronger acid? Is the forward or reverse reaction favored? d) Label Lewis acids and bases, nucleophiles and electrophiles in the left side of the reactions. A. 용 CH3OH я хон CH3O OH B. HBr CH3ONa NaBr CH3OHarrow_forward
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