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  2. General chemistry - Wikipedia

    en.wikipedia.org/wiki/General_chemistry

    General chemistry (sometimes referred to as "gen chem") is offered by colleges and universities as an introductory level chemistry course usually taken by students during their first year. [1] The course is usually run with a concurrent lab section that gives students an opportunity to experience a laboratory environment and carry out ...

  3. Stoichiometry - Wikipedia

    en.wikipedia.org/wiki/Stoichiometry

    A stoichiometric diagram of the combustion reaction of methane. Stoichiometry (/ ˌ s t ɔɪ k i ˈ ɒ m ɪ t r i / ⓘ) is the relationships between the masses of reactants and products before, during, and following chemical reactions.

  4. Ideal gas law - Wikipedia

    en.wikipedia.org/wiki/Ideal_gas_law

    The value used for γ is typically 1.4 for diatomic gases like nitrogen (N 2) and oxygen (O 2), (and air, which is 99% diatomic). Also γ is typically 1.6 for mono atomic gases like the noble gases helium (He), and argon (Ar). In internal combustion engines γ varies between 1.35 and 1.15, depending on constitution gases and temperature. ^ b.

  5. Homework - Wikipedia

    en.wikipedia.org/wiki/Homework

    A 2019 nationally representative survey of 95,505 freshmen at U.S. colleges, conducted by the UCLA Higher Education Research Institute, asked respondents, "During your last year in high school, how much time did you spend during a typical week studying/doing homework?" 1.9% of respondents said none, 7.4% said less than one hour, 19.5% said 1 ...

  6. Reaction quotient - Wikipedia

    en.wikipedia.org/wiki/Reaction_quotient

    In chemical thermodynamics, the reaction quotient (Q r or just Q) [1] is a dimensionless quantity that provides a measurement of the relative amounts of products and reactants present in a reaction mixture for a reaction with well-defined overall stoichiometry at a particular point in time.

  7. Skeletal formula - Wikipedia

    en.wikipedia.org/wiki/Skeletal_formula

    The skeletal formula of the antidepressant drug escitalopram, featuring skeletal representations of heteroatoms, a triple bond, phenyl groups and stereochemistry. The skeletal formula, line-angle formula, bond-line formula or shorthand formula of an organic compound is a type of molecular structural formula that serves as a shorthand representation of a molecule's bonding and some details of ...

  8. Inquiry-based learning - Wikipedia

    en.wikipedia.org/wiki/Inquiry-based_learning

    Inquiry-based learning (also spelled as enquiry-based learning in British English) [a] is a form of active learning that starts by posing questions, problems or scenarios. It contrasts with traditional education, which generally relies on the teacher presenting facts and their knowledge about the subject.

  9. Molecular orbital theory - Wikipedia

    en.wikipedia.org/wiki/Molecular_orbital_theory

    When one electron is removed from an sp 3 orbital, resonance is invoked between four valence bond structures, each of which has a single one-electron bond and three two-electron bonds. Triply degenerate T 2 and A 1 ionized states (CH 4 +) are produced from different linear combinations of these four structures. The difference in energy between ...