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Questions

Explanations

6 Which formula is an empirical formula?

(1) N₂O₄                (3) C₃H₆

(2) NH₃                  (4) P₄O₁₀

7 Chemical properties can be used to

(1) determine the temperature of a substance

(2) determine the density of a substance

(3) differentiate between two compounds

(4) differentiate between two neutrons

8 Ice, H₂O(s), is classified as

(1) an ionic compound

(2) a molecular compound

(3) a homogeneous mixture

(4) a heterogeneous mixture

9 Which phrase describes the molecular polarity and distribution of charge in a molecule of carbon dioxide, CO₂?

(1) polar and symmetrical

(2) polar and asymmetrical

(3) nonpolar and symmetrical

(4) nonpolar and asymmetrical

Symmetrical is Nonpolar

10 Which element tends not to react with other elements?

(1) helium            (3) phosphorus

(2) hydrogen      (4) potassium

Questions 1-5 Questions 6-10 Questions 11-15 Questions 16-20 Questions 21-25 Questions 26-30 Questions 31-35 Questions 36-40 Questions 41-45 Questions 46-50

Questions 51-54
 Questions 55-56 Questions 57-59 Questions 60-62 Questions 63-65  Questions 66  Questions 67-69  Questions 70-72 Questions 73-77 Questions 78-81 Questions 82-85