CHEMISTRY:CENTRAL SCI.,V.1-PKG.>CUSTOM<
15th Edition
ISBN: 9781323444535
Author: Brown
Publisher: PEARSON C
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Chapter 11.2, Problem 11.1.1PE
Only two isotopes of copper occur naturally:63Cu (atomic mass = 62.9296 amu; abundance 69.1795) 65Cu (atomic mass = 64.9278 amu; abundance 30.83%). Calculate the atomic weight (
ofcopper
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CHEMISTRY:CENTRAL SCI.,V.1-PKG.>CUSTOM<
Ch. 11.2 - Only two isotopes of copper occur naturally:63Cu...Ch. 11.2 - 2.36 Rubidium has two naturally occurring...Ch. 11.3 - a. Thomson’s cathode-ray tube (Figure 2.49) and...Ch. 11.3 -
2.38 Consider the mass spectrometer shown in...Ch. 11.4 - Naturally occurring magnesium has the following...Ch. 11.4 - Mass spectrometry is more often applied to...Ch. 11.5 - 2-41 For each of the following elements, write its...Ch. 11.5 - Locate each of the following elements in the...Ch. 11.6 - 2-43 For each of the following elements, write its...Ch. 11.6 - 2.44 The elements of group 4A show an interesting...
Ch. 11.7 - 2.45 The structural formulas of the compounds...Ch. 11.7 - 2.46 Ball-and-stick representations of benzene, a...Ch. 11 - Prob. 1DECh. 11 - 2.59 Using the periodic table to guide you,...Ch. 11 -
2.71 Name the following ionic compounds:
a....Ch. 11 -
2.83
What is a functional group?
What functional...Ch. 11 - The element lead (Pb) consists of four naturally...Ch. 11 - Prob. 5ECh. 11 - The molecules have the same molecular formula...Ch. 11 - A sample of an ionic compound containing iron and...Ch. 11 -
The compound dioxane, which is used as a solvent...Ch. 11 - If 3.00 g of titanium metal is reacted with 6.00 g...Ch. 11 -
2.48 Two substances have the same molecular and...Ch. 11 - 2.49 Write the empirical formula corresponding to...Ch. 11 - Determine the molecular and empirical formulas of...Ch. 11 - 251 How many hydrogen atoms are un each of the...Ch. 11 - Prob. 14ECh. 11 - 253 Write the molecular and structural formulas...Ch. 11 - 2-54 Write the molecular and structural formulas...Ch. 11 - Fill in the gaps in the following table’Ch. 11 - 2.56 Fill in the gaps in the following...Ch. 11 - Prob. 19ECh. 11 - Prob. 20ECh. 11 - Predict the chemical formulas of the compounds...Ch. 11 - Prob. 22ECh. 11 - Prob. 23ECh. 11 - Predict whether each of the following compounds is...Ch. 11 - 2.66 Which of the following are ionic, and which...Ch. 11 - Prob. 26ECh. 11 - Prob. 27ECh. 11 -
2.69 Give the names and charges of the cation and...Ch. 11 - Give the names and charges of the cation and anion...Ch. 11 - Prob. 30ECh. 11 -
Give the chemical formula for each of the...Ch. 11 -
2.75 Give the name or chemical formula, as...Ch. 11 - Prob. 33ECh. 11 -
2.T Give the name or Chemical formula, as...Ch. 11 - Prob. 35ECh. 11 - Prob. 36ECh. 11 - Assume that you encounter the following sentences...Ch. 11 - a. What is a hydrocarbon? b. Pentane is the alkane...Ch. 11 - Prob. 39ECh. 11 -
2.85 Chloropropane is derived from propane by...Ch. 11 - Prob. 41ECh. 11 - Suppose a scientist repeats the Millikan oil-drop...Ch. 11 -
2.88 The natural abundance of 3He is...Ch. 11 - A cube of gold that is 1.00 cm on a side has a...Ch. 11 -
2.90 The diameter of a rubidium atom is 4.95 A....Ch. 11 -
2.91
Assuming the dimensions of the nucleus and...Ch. 11 - (a) What is the significance of the critical...Ch. 11 -
2.93 The nucleus of 6Li is a powerful absorber of...Ch. 11 - The element oxygen has three naturally occurring...Ch. 11 - Using a suitable reference such as the CRC...Ch. 11 - There are two different isotopes of bromine atoms....Ch. 11 -
2.99 It is common in mass spectrometry to assume...Ch. 11 - From the following list of elements—Ar, H, Ga, Al,...Ch. 11 - Prob. 54ECh. 11 -
2.102 The explosion of an atomic bomb releases...Ch. 11 - Prob. 56ECh. 11 - Prob. 57ECh. 11 -
2.105 From the molecular structures shown here,...Ch. 11 -
2.106 Name each of the following oxides. Assuming...Ch. 11 - Prob. 60ECh. 11 - Prob. 61ECh. 11 - Give the chemical names of each of the following...Ch. 11 -
2.112 Many familiar substances have common,...Ch. 11 -
2.113 Because many ions and compounds have very...Ch. 11 -
2.114 In what part of the atom does the strong...Ch. 11 - In the following diagram, the white spheres...Ch. 11 - In the following digram, the white spheres...Ch. 11 - Prob. 68ECh. 11 - Balance these equations by providing the missing...Ch. 11 - Write the balanced equation for the reaction that...Ch. 11 - Prob. 71ECh. 11 - Which of the following is the correct formula...Ch. 11 - Prob. 73AECh. 11 - Prob. 74AECh. 11 - Calculate the percentage of potassium by mass in...Ch. 11 - Which of the following samples contains the fewest...Ch. 11 - In dichloromethane, CH2Cl2 (= 1.60D)), the...Ch. 11 - Prob. 78AECh. 11 -
How many oxygen atoms are in (a) 0.25 mol...Ch. 11 - Prob. 80AECh. 11 - Prob. 81AECh. 11 - What is the mass, in grams, of 6.33 mol of NaHC03...Ch. 11 - What is the mass, in grams, of (a) 0.50 mol of...Ch. 11 - How many chlorine atoms are in 12.2 g of CCL4? a....Ch. 11 -
a. How many nitric acid molecules are in 4.20 g...Ch. 11 - A 2.144-g sample of phosgene, a compound used as a...Ch. 11 - A 5.325-g sample of methyl benzoate, a compound...Ch. 11 -
Cyclohexane a commonly used organic solvent, is...Ch. 11 - Prob. 89AECh. 11 - Prob. 90IECh. 11 - Decomposition of KCIO3 is sometimes used to...Ch. 11 - Propane, C3 H8 (Figure 3.8), is a common fuel used...Ch. 11 -
Methanol, CH3OH, reacts with oxygen from air in a...Ch. 11 - When 24 mol of methanol and 15 mol of oxygen...Ch. 11 - a. When 1.50 mol of Al and 3.00 mol of Cl2 combine...Ch. 11 - Molten gallium reacts with arsenic to form the...Ch. 11 -
When a 2.00-g strip of zinc metal is placed in...
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- The element gallium, used in gallium arsenide semiconductors, has an atomic weight of 69.72 amu. There are only two isotopes of gallium, Ga with a mass of 6.9257 amu and Ga with a mass of 70.9249 amu. What are the isotopic abundances of gallium? Gallium melts just above room temperaturearrow_forward2.90 Naturally occurring europium has an average atomic weight of 151.964 amu. If the only isotopes of europium present are 151Eu and 153Eu, describe how you would determine the relative abundance of the two isotopes. Include in your description any information that would need to be looked up.arrow_forwardA hypothetical element X is found to have an atomic weight of 37.45 amu. Element X has only two isotopes, X-37 and X-38. The X-37 isotope has a fractional abundance of 0.7721 and an isotopic mass of 37.24. What is the isotopic mass of the other isotope?arrow_forward
- The mass-to-charge ratio for the positive ion F+ is 1.97 107 kg/C. Using the value of 1.602 1019 C for the charge on the ion, calculate the mass of the fluorine atom. (The mass of the electron is negligible compared with that of the ion, so the ion mass is essentially the atomic weight.)arrow_forwardAn element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abundance with 20.99 amu, and 8.82% abundance with 21.99 amu. Calculate the average atomic mass of this element.arrow_forwardThe following table presents the abundances and masses of the isotopes of zinc. What is the atomic weight of zinc?arrow_forward
- Calculate the atomic mass of each of the following elements using the given data for the percentage abundance and mass of each isotope. a. Lithium: 7.42% 6Li (6.01 amu) and 92.58% 7Li (7.02 amu) b. Magnesium: 78.99% 24Mg (23.99 amu), 10.00% 25Mg (24.99 amu), and 11.01% 26Mg (25.98 amu)arrow_forwardMass spectrometric analysis showed that there are four isotopes of an unknown element having the following masses and abundances: Three elements in the periodic table that have atomic weights near these values are lanthanum (La), atomic number 57, atomic weight 138.9055; cerium (Ce), atomic number 58, atomic weight 140.115; and praseodymium (Pr), atomic number 59, atomic weight 140.9076. Using the data above, calculate the atomic weight, and identify the element if possible.arrow_forwardVerify that the atomic weight of lithium is 6.94, given the following information: 6Li, mass = 6.015121 u; percent abundance = 7.50% 7Li, mass = 7.016003 u; percent abundance = 92.50%arrow_forward
- 2.87 What is the heaviest element to have an atomic weight that is roughly twice its atomic number? What does this suggest must he true about the nuclei of atoms with higher atomic numbers?arrow_forwardBromine has two occuring isotopes: 79Br with atomic mass 78.9183 and 81Br with atomic mass 80.9163. Without using a calculator, what would you estimate the % abundance of Br-79 to be?arrow_forwardCalculate the atomic mass of each of the following elements using the given data for the percentage abundance and mass of each isotope. a. Silver: 51.82% 107Ag (106.9 amu) and 48.18% 109Ag (108.9 amu) b. Silicon: 92.21% 28Si (27.98 amu), 4.70% 29Si (28.98 amu), and 3.09% 30Si (29.97 amu)arrow_forward
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