Questions

Explanations

21 The phase of a sample of a molecular substance at STP is not determined by its

(1) arrangement of molecules

(2) intermolecular forces

(3) number of molecules

(4) molecular structure

***Ponder this= if you have 1 molecule what phase is that in?

(2) a calcium atom (4) a nitrogen atom

Smallest value on Table S

(1) The products are completely consumed in the reaction.

(4) The concentrations of the products and reactants are constant.

concentrations are constant and the rates are equal

(2) carbon     (4) oxygen

25 In an oxidation-reduction reaction, the total number of electrons lost is

(1) equal to the total number of electrons gained

(2) equal to the total number of protons gained

(3) less than the total number of electrons gained

(4) less than the total number of protons gained

26 Which compounds are electrolytes?

(1) C2H5OH and H2SO4

(2) C2H5OH and CH4

(3) KOH and H2SO4

(4) KOH and CH4

27 Which compounds yield hydrogen ions as the only positive ions in an aqueous solution?

(1) H₂CO₃ and HC₂H₃O₂

(2) H₂CO₃ and NaHCO₃

(3) NH₃ and HC₂H₃O₂

(4) NH₃ and NaHCO₃

Table K

(3) unstable and spontaneously absorb alpha particles

(4) unstable and spontaneously emit alpha particles

(3) gamma radiation

(4) positron

30 The dating of geological formations is an example of a beneficial use of

(1) isomers

(2) electrolytes

(3) organic compounds

(4) radioactive nuclides

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