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Questions in chemistry

📝 Answered - An atom that has 13 protons and 15 neutrons is an isotope of which element?

📝 Answered - Which term identifies a type of nuclear reaction? A. Fermentation B. Reduction C. Deposition D. Fission

📝 Answered - A sample of CO2(s) and a sample of CO2(g) differ in their 1) chemical compositions 2) empirical formulas 3) molecular structures 4) physical properties

📝 Answered - According to one acid-base theory, a base is an A. [tex]H^+[/tex] acceptor B. [tex]Na^+[/tex] acceptor C. [tex]H^+[/tex] donor D. [tex]Na^+[/tex] donor

📝 Answered - Which equation represents sublimation? 1) [tex]Hg_{(l)} \to Hg_{(s)}[/tex] 2) [tex]NH_{3(g)} \to NH_{3(l)}[/tex] 3) [tex]H_2O_{(s)} \to H_2O_{(g)}[/tex] 4) [tex]CH_{4(l)} \to CH_{4(g)}[/tex]

📝 Answered - In which type of chemical reaction are electrons transferred? 1. Organic addition 2. Oxidation-reduction 3. Double replacement 4. Acid-base neutralization

📝 Answered - Which choice below would affect the rate of reaction in the opposite way from the other four? a. Cool the reaction down b. Add a catalyst c. Decrease the pressure d. Use larger pieces of solid reactants e. Decrease the concentration of the reactants

📝 Answered - Salt and sugar do not appear to have a fixed shape. Why do we call them solids?

📝 Answered - Why does copper have a high melting point?

📝 Answered - This is responsible for the relatively high boiling point of water: a. hydrogen bonding b. ionic bonding c. metallic bonding d. nonpolar covalent bonding e. polar covalent bonding