VincenTragosta - Tanya, Jawab, dan Belajar Tanpa Batas Logo

Questions in chemistry

[Terjawab] The table lists the number of protons, electrons, and neutrons in a certain radioactive nuclide. Which is the symbol of this radioactive nuclide? ${ }_{11}^{24} Na$ ${ }_{11}^{22} Na$ ${ }_{11}^{13} Al$ ${ }_{13}^{24} Al

[Terjawab] Test your understanding of isotopes by selecting the correct relationship between the pair of atoms. Argon-40 Argon-41 A. Same Atom, Not Isotopes of Each Other B. Isotopes C. Different Element

[Terjawab] Rank the following solutions in order based on pH. (1 = Highest pH; 4 = Lowest pH) $0.1 M HC _2 Cl _3 O _2$ [ Choose ] $0.1 M KClO _4$ [ Choose ] $0.1 M NaClO _2$ [ Choose ] 0.1 M NaF [ Choose ]

[Terjawab] Select the correct answer. Which quantity is a graduated cylinder designed for measuring? A. length B. mass C. temperature D. time E. volume

[Terjawab] Spend about 10 minutes on this activity. Electrolysis can be used to purify impure copper. 1. State the: a) name of the electrolyte used b) type of substance used as the cathode c) type of substance used as the anode d) electrode on which the pure copper deposits e) observations made at both electrodes. 2. State the names of the products formed at the cathode during the electrolysis of copper sulfate using carbon electrodes.

[Terjawab] Which statement best describes why specific heat capacity is often more useful than heat capacity for scientists when comparing two materials? A. Specific heat capacity is an intensive property and does not depend on sample size. B. Specific heat capacity is an extensive property and does not depend on sample size. C. Specific heat capacity is an intensive property and depends on the sample size. D. Specific heat capacity is an extensive property and depend on the sample size.

[Terjawab] Define the following terms: (a) Oxidation (b) Corrosion (c) Combustion (d) Aerobic respiration (e) Fuel Explain why combustion reactions are exothermic. Compare complete and incomplete combustion.

[Terjawab] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Terjawab] Which of the following best represents a double replacement reaction? A. A + B --> A + B B. A + B --> AB C. A + BC --> AC + B D. AC + BD --> AD + BC

[Terjawab] A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a mass number of 60. Which is the correct symbol for this nuclide? A. ${}_{80}^{27} Co$ B. ${}_{60}^{33} Co$ C. ${}_{33}^{60} Co$ D. ${}_{27}^{60} Co$