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Questions in chemistry

[Homework Help] Which statement defines the temperature of a sample of matter? 1. Temperature is a measure of the total electromagnetic energy of the particles. 2. Temperature is a measure of the total thermal energy of the particles. 3. Temperature is a measure of the average potential energy of the particles. 4. Temperature is a measure of the average kinetic energy of the particles.

[Homework Help] Which quantity can vary among atoms of the same element? A. mass number B. atomic number C. number of protons D. number of electrons

[Homework Help] During the operation of a voltaic cell, the cell produces: 1. Electrical energy spontaneously 2. Chemical energy spontaneously 3. Electrical energy nonspontaneously 4. Chemical energy nonspontaneously

[Homework Help] Which substances have atoms of the same element but different molecular structures? A. He(g) and Ne(g) B. K(s) and Na(s) C. O2(g) and O3(g) D. P4(s) and S8(s)

[Homework Help] I don't understand this. In a bond between an atom of carbon and an atom of fluorine, the fluorine atom has a? A. weaker attraction for electrons B. stronger attraction for electrons C. smaller number of first-shell electrons D. larger number of first-shell electrons

[Homework Help] Which elements have the most similar chemical properties? A. Si, As, and Te B. Mg, Sr, and Ba C. N2, O2, and F2 D. Ca, Cs, and Cu Please explain your answer.

[Homework Help] An atom that has 13 protons and 15 neutrons is an isotope of which element?

[Homework Help] Which term identifies a type of nuclear reaction? A. Fermentation B. Reduction C. Deposition D. Fission

[Homework Help] 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

[Homework Help] 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