Bundle: Introductory Chemistry: An Active Learning Approach, 6th + OWLv2, 1 term (6 months) Printed Access Card
6th Edition
ISBN: 9781305717367
Author: Mark S. Cracolice, Ed Peters
Publisher: Cengage Learning
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Chapter 7, Problem 4E
It may be said that because atomic, molecular, and formula masses are all based on
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Boron trifluoride is used as a catalyst in the synthesis of or-ganic compounds. When this compound is analyzed by massspectrometry several different 1+ ions form, including ions representing the whole molecule as well as molecular fragments formed by the loss of one,two, and three F atoms. Given that boron has two naturally occurring isotopes, ¹⁰B and ¹¹B, and fluorine has one, ¹⁹F, calculate the masses of all possible 1+ ions
Given the table of atomic weights listed below, determine the molecular mass (weight) of the sulphuric acid
molecule H2S04. Enter your answer without units as a whole number i.e. rounded to zero decimal places.
Atomic Weight
(g/mol)
Element
Symbol
Hydrogen
1.01
Carbon
12.01
Nitrogen
14.01
Охудеп
16.00
Phosphorous
P
30.97
Sulphur
32.06
Chlorine
CI
35.45
Potassium
K
39.10
Assume that for the following molecules, carbon=12 amu, hydrogen= 1 amu, nitrogen= 14 amu and oxygen= 16 amu. Please calculate the molecular mass of molecular oxygen.
Chapter 7 Solutions
Bundle: Introductory Chemistry: An Active Learning Approach, 6th + OWLv2, 1 term (6 months) Printed Access Card
Ch. 7 - How many atoms of each element are in a formula...Ch. 7 - Prob. 2ECh. 7 - Why is it proper to speak of the molecular mass of...Ch. 7 - It may be said that because atomic, molecular, and...Ch. 7 - Which of the three terms atomic mass, molecular...Ch. 7 - In what units are atomic, molecular, and formula...Ch. 7 - Prob. 7ECh. 7 - Determine the formula or molecular mass of each...Ch. 7 - What is the molecular mass of each of the...Ch. 7 - Calculate the mass of each of the following...
Ch. 7 - What do quantities representing 1mole of iron...Ch. 7 - Explain what the term mole means. Why is it used...Ch. 7 - Is the mole a number? Explain.Ch. 7 - Give the name and value of the number associated...Ch. 7 - Determine how many atoms, molecules or formula...Ch. 7 - a How many molecules of boron trifluoride are...Ch. 7 - Calculate the number of moles in each of the...Ch. 7 - a How many atoms of hydrogen are present in...Ch. 7 - In what way are the molar mass of the atoms and...Ch. 7 - How does molar mass differ from molecular mass?Ch. 7 - Find the molar mass of all the following...Ch. 7 - Calculate the molar mass of each of the following:...Ch. 7 - Prob. 23ECh. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 23 to 26: Find the number of moles for...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Questions 27 to 30: Calculate the mass of each...Ch. 7 - Prob. 31ECh. 7 - Prob. 32ECh. 7 - Prob. 33ECh. 7 - Prob. 34ECh. 7 - Questions 35 and 36:Calculate the mass of each of...Ch. 7 - Questions 35 and 36: Calculate the mass of each of...Ch. 7 - 37. On a certain day a financial website quoted...Ch. 7 - How many carbon atoms has a gentleman given his...Ch. 7 - A person who sweetens coffee with two teaspoons of...Ch. 7 - The mass of 1 gallon of gasoline is about 2.7kg....Ch. 7 - Prob. 41ECh. 7 - a How many molecules are in 3.61g F2? b How many...Ch. 7 - Questions 43 and 44: Calculate the percentage...Ch. 7 - Prob. 44ECh. 7 - Lithium fluoride is used as a flux when welding or...Ch. 7 - Ammonium bromide is a raw material in the...Ch. 7 - Potassium sulfate is found in some fertilizers as...Ch. 7 - Magnesium oxide is used in making bricks to line...Ch. 7 - Zinc cyanide cyanide ion, CN, is a compound used...Ch. 7 - An experiment requires that enough C5H12O be used...Ch. 7 - Molybdenum (Z=42) is an element used in making...Ch. 7 - How many grams of nitrogen monoxide must be...Ch. 7 - How many grams of the insecticide calcium chlorate...Ch. 7 - If a sample of carbon dioxide contains 16.4g of...Ch. 7 - Explain why C6H10 must be a molecular formula,...Ch. 7 - From the following list, identify each formula...Ch. 7 - A certain compound is 52.2 carbon, 13.0 hydrogen,...Ch. 7 - A compound is found to contain 15.94 boron and...Ch. 7 - A researcher exposes 11.89g of iron to a stream of...Ch. 7 - A compound is found to contain 39.12 carbon, 8.772...Ch. 7 - A compound is 17.2C, 1.44%H, and 81.4%F. Find its...Ch. 7 - A compound is found to contain 21.96 sulfur and...Ch. 7 - An antifreeze and coolant widely used in...Ch. 7 - A compound is found to contain 31.42 sulfur, 31.35...Ch. 7 - A compound is 73.1 chlorine, 24.8 carbon, and the...Ch. 7 - A compound is found to contain 25.24 sulfur and...Ch. 7 - Prob. 67ECh. 7 - Prob. 68ECh. 7 - Prob. 69ECh. 7 - Prob. 70ECh. 7 - Prob. 71ECh. 7 - The quantitative significance of take a deep...Ch. 7 - Prob. 73ECh. 7 - Prob. 74ECh. 7 - CoaSbOcXH2O is the general formula of a certain...Ch. 7 - Prob. 1CLECh. 7 - Prob. 2CLECh. 7 - Prob. 1PECh. 7 - Prob. 2PECh. 7 - Prob. 3PECh. 7 - Prob. 4PECh. 7 - Prob. 5PECh. 7 - Determine the mass in grams of 3.21024 molecules...Ch. 7 - Prob. 7PECh. 7 - Prob. 8PECh. 7 - In Practice Exercise 7-7, you determined that...Ch. 7 - Prob. 10PECh. 7 - Prob. 11PECh. 7 - Prob. 12PECh. 7 - Prob. 13PECh. 7 - Nicotine is 74.1 carbon, 8.64 hydrogen, and 17.3...Ch. 7 - A compound has a molar mass of 292g/mol. Its...
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- The mass spectrum of bromine (Br2) consists of three peaks with the following characteristics: Mass (u) Relative Size 157.84 0.2534 159.84 0.5000 161.84 0.2466 How do you interpret these data?arrow_forwardhe vigorous reaction between aluminum and iodine gives the balanced equation: :math>2Al(s)+3I2(s)2AlI2(s). mg src=Images/HTML_99425-9-2QAP_image001.jpg alt="" align="top"/> at do the coefficients in this balanced chemical equation tell us about the proportions in which these substances react on a macroscopic (mole) basis?arrow_forwardThe mass spectrum of phosphoryl chloride. POF3, is illustrated here. (a) Identify the cation fragment at a m/Z ratio of 85. (b) Identify the cation fragment at a m/Z ratio of 69. (c) Which two peaks in the mass spectrum provide evidence that the oxygen atom is connected to the phosphorus atom and is not connected to any of the three fluorine atoms?arrow_forward
- What is the mass of one 16O atom, in grams? (The mass of an 16O atom is 15.995 u.)arrow_forwardThe mass spectrum of CH3Cl is illustrated here. You know that carbon has two stable isotopes, and 13C with relative abundances of 98.9% and 1.1%, respectively, and chlorine has two isotopes, 35a and 37CI with abundances of 75.77% and 24.23%, respectively. (a) What molecular species gives rise to the lines at m/Z of 50 and 52? Why is the line at 52 about 1/3 the height of the line at 50? (b) What species might be responsible for the line at m/Z = 51?arrow_forwardConsider the following data for three binary compounds of hydrogen and nitrogen: %H (by Mass) %N (by Mass) I 17.75 82.25 II 12.58 87.42 III 2.34 97.66 When 1.00 L of each gaseous compound is decomposed to its elements, the following volumes of H2(g) and N2(g) are obtained: H2(L) N2(L) I 1.50 0.50 II 2.00 1.00 III 0.50 1.50 Use these data to determine the molecular formulas of compounds I, II, and III and to determine the relative values for the atomic masses of hydrogen and nitrogen.arrow_forward
- Argon has three naturally occurring isotopes: 0.3336% 36Ar, 0.063% 38Ar, and 99.60% 40Ar. Estimate the average atomic mass of argon. If the masses of the isotopes are 35.968 u, 37.963 u, and 39.962 u, respectively, calculate the average atomic mass of natural argon.arrow_forwardGallium arsenide, GaAs, has gained widespread use in semiconductor devices that convert light and electrical signals in fiber-optic communications systems. Gallium consists of 60.% 69Ga and 40.% 71Ga. Arsenic has only one naturally occurring isotope, 75As. Gallium arsenide is a polymeric material, but its mass spectrum shows fragments with the formulas GaAs and Ga2As2. What would the distribution of peaks look like for these two fragments?arrow_forwardBoron consists of two isotopes, 10B and 11B. Chlorine also has two isotopes, 35Cl and 37Cl. Consider the mass spectrum of BC13. How many peaks would be present, and what approximate mass would each peak correspond to in the BCl3 mass spectrum?arrow_forward
- 2.75 Chlorine has only two isotopes, one with mass 35 and the other with mass 37. One is present at roughly 75% abundance, and the atomic weight of chlorine on a periodic table is 35.45. Which must be the correct mass spectrum for chlorine?arrow_forwardNeon has three stable isotopes, one with a small abundance. What are the abundances of the other two isotopes? 20Ne, mass = 19.992435 u; percent abundance = ? 21Ne mass = 20.993843 u; percent abundance = 027% 22Ne mass = 21.991383 u: percent abundance = ?arrow_forwardEuropium has two stable isotopes, 151Eu and 153Eu, with masses of 150.9197 u and 152.9212 u, respectively. Calculate the percent abundances of these isotopes of europium.arrow_forward
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