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- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/10%3A_Solids_Liquids_and_Solutions/10.14%3A_Phase_DiagramsPhase diagrams graphically display the temperatures and pressures at which substances change phase.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/07%3A_Further_Aspects_of_Covalent_Bonding/7.10%3A_Polar_Covalent_Bonds/Lecture_DemonstrationsAdd iodine crystals to a pre-heated 2 L Erlenmeyer flask on a hotplate and observe the sublimation and subsequent formation of beautiful crystals. Easy sublimation is due to lack of permanent charge. ...Add iodine crystals to a pre-heated 2 L Erlenmeyer flask on a hotplate and observe the sublimation and subsequent formation of beautiful crystals. Easy sublimation is due to lack of permanent charge. An HCl fountain can be used [1] [2] [3] [4] to demonstrate the high solubility of HCl in polar water. "Tested Demonstrations in Chemistry", J. Moore (UW-Madison), Justin Shorb (Hope College), Xavier Prat-Resina (University of Minnesota Rochester), Tim Wendorff, and Adam Hahn.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/08%3A_Properties_of_Organic_Compounds/8.06%3A_Alkanes/TitanFigure \(\PageIndex{5}\) In all alkanes, portions of the molecule can flex or rotate about all the single carbon-carbon bonds. (a) Shown in the animated figure is the rotation of one methyl group, CH ...Figure \(\PageIndex{5}\) In all alkanes, portions of the molecule can flex or rotate about all the single carbon-carbon bonds. (a) Shown in the animated figure is the rotation of one methyl group, CH 3 , with respect to the other in a molecule of ethane, CH 3 CH 3 . It takes more energy to go through the eclipsed formation, where hydrogen atoms on both methyl groups line up. (b) A movie showing the rotation, vibration and translation of hexane (C 6 H 14 ).
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/02%3A_Atoms_Molecules_and_Chemical_Reactions/2.12%3A_Formulas_and_Composition/Iron_SupplementsThe mass of 4 mol C it contains is \(m_{\text{C}}\text{ = 4 mol C }\times \text{ }\frac{\text{12}\text{.0 g}}{\text{1 mol C}}\text{ = 48}\text{.0 g}\) Therefore the percentage of C is \(\text{ }\!\!%\...The mass of 4 mol C it contains is \(m_{\text{C}}\text{ = 4 mol C }\times \text{ }\frac{\text{12}\text{.0 g}}{\text{1 mol C}}\text{ = 48}\text{.0 g}\) Therefore the percentage of C is \(\text{ }\!\!%\!\!\text{ C = }\frac{m_{\text{C}}}{m_{\text{C}_{\text{4}}\text{H}_{\text{2}}\text{O}_{\text{4}}\text{Fe}_{\text{1}}}}\text{ }\times \text{ 100 }\!\!%\!\!\text{ = }\frac{\text{48}\text{.0 g}}{\text{169}\text{.9 g}}\text{ }\times \text{ 100 }\!\!%\!\!\text{ = 28}\text{.3 }\!\!%\!\!\text{ }\) The perc…
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/08%3A_Properties_of_Organic_Compounds/8.25%3A_Condensation_PolymersFormation of a condensation polymer produces \(H_2O\), \(HCl\), or some other simple molecule, which escapes as a gas. A familiar example of a condensation polymer is nylon, which is obtained from the...Formation of a condensation polymer produces \(H_2O\), \(HCl\), or some other simple molecule, which escapes as a gas. A familiar example of a condensation polymer is nylon, which is obtained from the reaction of two monomers.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/10%3A_Solids_Liquids_and_Solutions/10.25%3A_Boiling-Point_Elevation_and_Freezing-Point_DepressionThis section details how the amount of particles dissolved within a solution affects both the boiling point and freezing point of the solution.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/08%3A_Properties_of_Organic_Compounds/8.11%3A_Hydrogen_Bonding%3A_Water/H-Bonding_Between_2_HF_Molecules.jpgClick on a date/time to view the file as it appeared at that time. Edit this file using an external application (See the setup instructions for more information) The following file redirects to this f...Click on a date/time to view the file as it appeared at that time. Edit this file using an external application (See the setup instructions for more information) The following file redirects to this file: The following page links to this file: This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/04%3A_The_Structure_of_Atoms/4.08%3A_RadiationJust prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that ...Just prior to the turn of the twentieth century, additional observations were made which contradicted parts of Dalton’s atomic theory. The French physicist Henri Becquerel discovered by accident that compounds of uranium and thorium emitted rays which, like rays of sunlight, could darken photographic films. Although themselves invisible to the human eye, the rays could be detected easily because they produced visible light when they struck phosphors such as impure zinc sulfide.
- https://chem.libretexts.org/Courses/University_of_North_Texas/UNT%3A_CHEM_1410_-_General_Chemistry_for_Science_Majors_I/Text/08%3A_Properties_of_Organic_Compounds/8.06%3A_Alkanes/Boiling_Points_of_Some_Organic_Compounds_Whose_Molecules_Contain_32_or_34_ElectronsA "C" "H" 3 group is bonded to an "O" which is also bonded to a second "C". This "C" is double bonded to an "O" and single bonded to a "H". A "C" "H" 3 "C" "H" 2 group is connected to another "C" whic...A "C" "H" 3 group is bonded to an "O" which is also bonded to a second "C". This "C" is double bonded to an "O" and single bonded to a "H". A "C" "H" 3 "C" "H" 2 group is connected to another "C" which is double bonded to an "O" and single bonded to a "H". A "C" "H" 3 "C" "H" 2 "C" "H" 2 straight alkane chain is bonded to an "O" "H" group via its last "C". A "C" "H" 3 group is bonded to a "C" which is double bonded to an "O" and single bonded to an "O" "H" group.
- https://chem.libretexts.org/Courses/Hope_College/CHEM_125/Exam_I/04%3A_Using_Chemical_Equations_in_Calculations/4.03%3A_The_Limiting_Reagent/4.3.04%3A_Sodium_Silicide_Fueled_BicyclesSuppose the sodium silicide made by a different method is Na 2 Si [8] [9] , and it produces ordinary "water glass", or sodium silicate (Na 2 SiO 3 (s) [10] ) rather than Na 2 Si 2 O 5 (s) [11] . In th...Suppose the sodium silicide made by a different method is Na 2 Si [8] [9] , and it produces ordinary "water glass", or sodium silicate (Na 2 SiO 3 (s) [10] ) rather than Na 2 Si 2 O 5 (s) [11] . In that case, if the bicyclist wants to travel about 30 miles and brings 1 quart of water and one 1.5 lb cartridge, which is the limiting reagent?
- https://chem.libretexts.org/Courses/Hope_College/CHEM_125/Exam_I/05%3A_Chemical_Bonding_-_Electron_Pairs_and_Octets/5.05%3A_Polyatomic_IonsPolyatomic ions, common in any lab, contain several atoms covalently bonded together. Often, these ions are charged and combine with metals to form ionic bonds.
