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2-4-ALD Posted by: drglennlo
Video duration: 503 seconds Choose the electron configuration that corresponds to an excited state for the K atom. A. 1s22s22p63s23p63d1 B. 1s22s22p63s23p64s1 C. 1s22s22p63s23p6 D. None of the above Related: chemistry, config, configuration, electron |
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Chem Q&A: Amount of Solute Posted by: drglennlo
Video duration: 173 seconds An aqueous solution in the lab is labeled "6.00 M HC2H3O2". How many grams of acetic acid are in a 2.00 L sample of this solution? Related: aid, chem, cindy, honors, mass, molar, molarity, project, soto, study |
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Chem Q&A. Stoichiometry Posted by: drglennlo
Video duration: 155 seconds A solution containing acetic acid is mixed with calcium carbonate. How much acetic acid is consumed in a reaction which produces 0.400 mol CO2? Related: chemistry, honors, jerry, mcdonald, project, stoichiometry |
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Chem Q&A: Stoichiometry: Percent Yield Posted by: drglennlo
Video duration: 365 seconds Consider a 3.52-g sample of CaCO3 (99.87% pure) in a flask and a 100.0 mL sample of vinegar (5% acidity) in a graduated cylinder. The combined mass of both reagents and containers is 255.98 g. After swirling the reaction mixture for about twenty minutes, the combined mass of the reaction mixture and containers is found to be 254.46 g. What is the percent yield of carbon dioxide in this experiment? Related: aid, chemistry, cindy, honors, percent, project, soto, stoichiometry, study, yield |
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Chem Q&A: Stoichiometry Posted by: drglennlo
Video duration: 238 seconds A solution containing acetic acid is mixed with 0.600 mol CaCO3. Suppose the reaction produces 0.400 mol CO2. HOw much CaCO3 is left unreacted? Related: aid, chemistry, cindy, honors, mass, molar, project, soto, study |
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2-4-4 Posted by: drglennlo
Video duration: 204 seconds Which of the following is the ground state electron configuration of Al? A. [Ne] 3s2 3p1 B. [He] 2s2 2p6 3s2 3p1 C. [Mg] 3p1 D. all of the above Related: 2-4-4, chemistry, configuration, core, electron, gas, noble |
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Chem Q&A: molar mass Posted by: drglennlo
Video duration: 145 seconds Which of the following has a molar mass of 60.06 g/mol? A. CaCO3, B. HC2H3O2, C. none of these Jerry's honors project for CHEM 105. Related: aid, chemistry, mass, molar, question, study |
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Chem Q&A: Moles to Mass Posted by: drglennlo
Video duration: 164 seconds If an experiment calls for 0.200 mol acetic acid (HC2H3O2), how many grams of glacial acetic acid do we need? Related: aid, chemistry, cindy, honors, mass, molar, projec, soto, study |
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Chem Q&A: Molar Mass Posted by: drglennlo
Video duration: 139 seconds What is the mass of one mole of CO2? A. 28.01 g, B. 30.01 g, C. 44.01 g Related: aid, chemistry, cindy, honors, mass, molar, project, soto, study |
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2-6-6 Posted by: drglennlo
Video duration: 190 seconds QUESTION: The decreasing trend in ionization energy going down a group is, is due to... A. Increasing repulsions among electrons in the valence shell B. Increasing effective nuclear charge C. Decreasing number of core electrons D. Increasing size of valence shell Related: 2-6-6, chemistry, decreasing, effect, energy, group, ionization, shielding, trend |
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2-7-3 Posted by: drglennlo
Video duration: 202 seconds What is the electron configuration of Fe3+? A. [Ar] 4s2 3d6 B. [Ar] 4s2 3d3 C. [Ar] 4s1 3d4 D. [Ar] 3d5 Related: 2-7-3, chemistry, configuration, electron |
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2-4-5 Posted by: drglennlo
Video duration: 193 seconds How many electrons are unpaired in the ground state of Oxygen? A. 0, B. 1, C. 2, D. 3 Related: 2-5-5, chemistry, configuration, diagram, electron, electrons, orbital, unparired |
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3-2-2 Posted by: drglennlo
Video duration: 186 seconds Which pair of atoms would form a polar covalent but essentially nonpolar bond? A. N and N, B. H and C, C. Na and Cl, D. Be and I Related: 3-2-2, bond, chemistry, covalent, electronegativity, nonpolar, polar |
