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Hydrogen

AP Chemistry MIDTERM review C

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Zn + N O 3- + H+ ?Zn2+ + N H 4+ + H 2O Which statement about this reaction is correct? The oxidation number of H changes from +1 to 0 The oxidation number of H changes from +1 to -1 The oxidation number of N changes from +5 to -3 The oxidation number of N changes from +5 to +3 The oxidation number of N changes from +6 to +4 Assign oxidation numbers to each element Zinc goes from 0 to +2 (lost 2 electrons) N goes from +5 to -3 (gained 8 electrons) C 100 0 +5 -2 -3 +1 +1 -2 2H2O2(g) + S(s) ? SO2(g) + 2H2O(g) What is the enthalpy change in the reaction? C 200 Substance ?Hf (kJ/mol) H2O2(g) -150 S(s) 0 SO2(g) -300 H2O(g) -250 -500 kJ -200 kJ 200 kJ 400 kJ 600 kJ [2(-250) + (-300) ] ? [2(-150) + 0] = -500 C 300 CH3CH2OH(g) + ___O2(g) ? ___CO2(g) + ___H2O(g)

AP Chem Final Review

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Chemistry Final Review By: AP Chemistry Class Nuclear...Some Definitions ? Nucleons-any particle found in the nucleus - ex(protons and neutrons) ? Nuclide-atom defined by # of protons and neutrons in nucleus ? Isotopes-same # of protons, but different # of neutrons ? Attraction stronger in nucleus than repulsion ? Hideki Yukawa Nuclear Types of forces: ? Strong Nuclear Force-interaction that binds nucleons together when very close...short distances=larger nuclei Nuclear Binding energy: ? When protons and neutrons come together, energy released ? More stable=Lower Energy ? Nuclear Binding energy-energy released when nucleons come together ? Mass of atom

AP Chem Study Guide

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Chemistry Final Review By: AP Chemistry Class Nuclear...Some Definitions ? Nucleons-any particle found in the nucleus - ex(protons and neutrons) ? Nuclide-atom defined by # of protons and neutrons in nucleus ? Isotopes-same # of protons, but different # of neutrons ? Attraction stronger in nucleus than repulsion ? Hideki Yukawa Nuclear Types of forces: ? Strong Nuclear Force-interaction that binds nucleons together when very close...short distances=larger nuclei Nuclear Binding energy: ? When protons and neutrons come together, energy released ? More stable=Lower Energy ? Nuclear Binding energy-energy released when nucleons come together ? Mass of atom

AP Chemistry Zumdahl 7E Chapter 18 Notes

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AP Chemistry A. Allan Chapter 18 - The Representative Elements: Groups 1A through 4A 18.1 A Survey of the Representative Elements A. Basic Trends 1. Metals tend to lose electrons and form cations 2. Nonmetals tend to gain electrons and form anions 3. Metalloids (semi-metals) have properties of both metals and nonmetals a. B, Si, Ge, As, Sb, Te, Po, At 4. Metallic character tends to increase as atomic number increases within a group B. Atomic Size and Group Anomalies (Anomaly = oddity) 1. Hydrogen vs. Other Group I Elements a. Very small, relatively high electronegativity (2.1) b. Forms covalent bonds with nonmetals - other Group I elements form ionic bonds with nonmetals 2. Beryllium vs. Other Group II Elements a. Small, electronegativity of 1.5 produces covalent bonds with

Chemical Nomenclature - Notes

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Notes ? chemical nomenclature/naming compounds Ch 6.3-6.6 Monoatomic noble gases These are the noble gases. These are elements that exist in nature as isolated elements. They do not combine with other elements to form compounds (as far as this class is concerned). Diatomic Molecules Diatomic elements or molecules ? compounds made of two atoms of the same element I2 Br2 Cl2 F2 O2 N2 H2 Binary compounds made of at least 2 different elements Three types Type 1 ? metals and nonmetals Type 2 ? metals and nonmetals Type 3 ? nonmetals and nonmetals Type 1 Ionic compounds that contain a metal and nonmetal Metal forms one cation (from group 1, 2, 13) the nonmetal forms the anion Write the Cation first and the anion second, put an ?-ide? on the end of the nonmetal

inorganic chemistry lab report Al-Zn alloy

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1 Experiment 7: Analysis of Aluminum ?Zinc Alloy Objective: The objective of this experiment is to determine the percent composition of Aluminum in an Aluminum-Zinc Alloy. In addition, we use Excel get the trendline equation of H2 gas and %Al. Method:

inorganic chemistry lab report Al-Zn alloy

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5 Chemistry 181 Yeting Liu Fall 2014 Thu 7:30 Experiment 7: Analysis of Aluminum ?Zinc Alloy Objective: The objective of this experiment is to determine the percent composition of Aluminum in an Aluminum-Zinc Alloy. In addition, we use Excel get the trendline equation of H2 gas and %Al. Method:

Raven Biology Chapter 2 Notes

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Gavin Morgan 8/31/2015 Chapter 2 2-Point Notes The Nature of Atoms Atomic structure includes a central nucleus and orbiting electrons: 1. Danish physicist Niels Bohr created the model of the atom in 1913, which is still used today. 2. An atom?s mass is measured in daltons (6.02 x 1023 daltons = 1 g). A proton and neutron each way 1 dalton. Electrons determine the chemical behavior of atoms: 1. The position of an electron cannot be determined at any given time. 2. Orbitals are predictions where electrons are most likely to be found. Atoms contain discrete energy levels: 1. Electrons contain discrete energy levels which correspond to quanta.

quiz 1

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Evolution is biology?s core theme that ties together all the other themes. Which of the following is not explained by the theory of evolution? a. The unity and diversity of life. b. How organisms become adapted to their environment through the differential reproductive success of varying individuals. c. Why distantly related organisms sometime resemble each other. d. How the first living cells were formed. e. How humans have descended from common ancestors shared with other primate species. Which of the following is necessary for cell survival? a. Reading of the DNA sequence to produce proteins. b. Response to environmental conditions. c. Obtain and process energy. d. Both A and C are true. e. All of the above are true.

ap_bio_ch_1_2.ppt

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Introductory Questions #1 Name the seven main properties of life. (Pg. 3) Which of the hierarchial levels of biology is the lowest in regard to carrying on and sustaining all life activities and is the fundamental unit of life? (pg 5) Introductory Questions #1 3. In your own words briefly describe what ?emergent properties? are. 4. How is negative feedback different from positive feedback? (pg. 11) What do these mechanisms do for a living thing? 5. Name the three domains of life. Which domain includes four out of the six kingdoms of life? 6. Why is natural selection considered the ?mechanism? for evolutionary adaptations to occur? 7. How is a hypothesis different from a theory?

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