5. Calculate the molality of a solution containing 21.2 g of C6H12O6 in 249.6 mL of water (assume the density of water : 1.00 g/mL; density of the solution : 1.05 g/mL;). (A) 0.471 m; (B) 0.435 m; (C) 0.0783 m; (D) 0.00841 m; (E) 0.458 m

7. Which of the following statements about solids is false? (A) The hexagonal closest-packed structure is ABAB.... (B) A body-centered cubic unit cell has four atoms per unit cell. (C) For unit cells having the same edge length, a simple cubic structure would have a smaller density than abody-centered cube. (D) Atoms in a solid consisting of only one element would have six nearest neighbors if the crystal structurewas a simple cubic array. (E) All the statements are correct.

5. Calculate the molality of a solution containing 21.2 g of C₆H₁₂O₆ in 249.6 mL of water (assume the density of water : 1.00 g/mL; density of the solution : 1.05 g/mL;).
(A) 0.471 m;
(B) 0.435 m;
(C) 0.0783 m;
(D) 0.00841 m;
(E) 0.458 m

相關試題

相關試卷