Chapter 8 Mole Conversions Part 1. How many moles are in 12.3 g of uranium?
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Transcript of Chapter 8 Mole Conversions Part 1. How many moles are in 12.3 g of uranium?
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Chapter 8
Mole ConversionsPart 1
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How many moles are in 12.3 g of uranium?
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How many moles are in 12.3 g of uranium?
12.3 g mol U
238.0 g= 0.0517 mol U
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How many grams are in 3.39 mol of table salt, NaCl?
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How many grams are in 3.39 mol of table salt, NaCl?
3.39 mol NaCl 58.5 g
mol= 198 g NaCl
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How many atoms are in 5.2 mol of Cu
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How many atoms are in 5.2 mol of Cu
5.2 mol Cu 6.02 x 1023 Cu atoms
mol Cu= 3.1 x 1024 Cu atoms
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How many moles are in 9.76 x 1024 molecules of sulfuric acid, H2SO4?
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How many moles are in 9.76 x 1024 molecules of sulfuric acid, H2SO4?
9.76 x 1024 H2SO4 molecules mol H2SO4
= 16.2 mol H2SO4
6.02 x 1023 H2SO4 molecules
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Some gaseous elements are composed of atoms
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Other gaseous elements are composed of molecules
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Many Gaseous elements are “diatomic”
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Diatomic Molecules
H2 O2 N2 Cl2 F2 I2 Br2
Hydrogen (H2) Fluorine (F2)Oxygen (O2) Nitrogen (N2) Chlorine (Cl2) Bromine (Br2)Iodine (I2)
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How can you tell which gaseous elements are atoms and which are
diatomic molecules?
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Diatomic Molecules
H O N Cl F I Br
H2 O2 N2 Cl2 F2 I2 Br2
Hydrogen (H2) Fluorine (F2)Oxygen (O2) Nitrogen (N2) Chlorine (Cl2) Bromine (Br2)Iodine (I2)
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Find the mass of 3.26 x 1028 molecules of O2
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Find the mass of 3.26 x 1028 molecules of O2
3.26 x 1028 O2 molecules
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Find the mass of 3.26 x 1028 molecules of O2
3.26 x 1028 O2 molecules mol O2
6.02 x 1023 O2 molecules
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Find the mass of 3.26 x 1028 molecules of O2
3.26 x 1028 O2 molecules mol O2 32.0 g
6.02 x 1023 O2 molecules mol O2
= 1.73 x 106 g O2
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• Prozac, C17H18F3NO, is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors (SSRIs). Prozac affects chemicals in the brain that may become unbalanced and cause depression, panic, anxiety, or obsessive-compulsive symptoms. Find its molar mass.
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• Prozac, C17H18F3NO, is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors (SSRIs). Prozac affects chemicals in the brain that may become unbalanced and cause depression, panic, anxiety, or obsessive-compulsive symptoms. Find its molar mass.
17(12.0) + 18(1.0) + 3(19.0) + 14.0 + 16.0 = 309.0g/mol
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO
day
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g
day mg
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g mol
day mg 309.0 g
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g mol 7 days
day mg 309.0 g week
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g mol 7 days
day mg 309.0 g week= 4.53 x 10 - 4 mol/week
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g mol 7 days
day mg 309.0 g week= 4.53 x 10 - 4 mol/week
How many atoms of C would the patient consume in one week?
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• The recommended starting dose of prozac is
20.0 mg each day.
• How many moles of prozac would a patient starting prozac take in one week?
20.0 mg C17H18F3NO 0.001g mol 7 days
day mg 309.0 g week= 4.53 x 10 - 4 mol/week
How many atoms of C would the patient consume in one week?
4.53 x 10-4 mol C17H18F3NO 6.02 x 1023 molecules 17 atoms C
mol molecule
= 4.64 x 1021 C atoms
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Information for Upcoming Mole Quiz
• How does a mole relate to particles and mass? (example: One mole of H2O is 6.02 x 1023 H2O molecules and has a mass of 18g).
• Be able to use this information in factor-label problems.
• Know how to determine the number of atoms in a molecule. Be able to use this information in factor-label problems.
• Be able to determine the number of grams/molecule.• Identify the diatomic gases.• Do metric conversions.
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Homework
• Worksheet – Mole Conversions (There is a front and back to this worksheet).