9. Calculate the molar mass of a sample with a single molecule weighs 9.31 × 10^-23 g.(A) 56.1 g/mol(B) 6.47 × 10^45 g/mol(C) 6.02 × 10^23 g/mol(D) 9.31 × 10^-23 g/mol

19. For the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is: (A) \( K = \frac{[\text{H}^+][\text{NO}_2^-]}{[\text{HNO}_2]} \) (B) \( K = \frac{[\text{H}^+][\text{N}^{3+}][\text{O}^{2-}]^2}{[\text{HNO}_2]} \) (C) \( K = [\text{H}^+][\text{NO}_2^-] \) (D) \( K = \frac{[\text{H}^+]^2[\text{NO}_2^-]}{[\text{HNO}_2]} \)

9. Calculate the molar mass of a sample with a single molecule weighs \(9.31 \times 10^{-23}\) g.
(A) 56.1 g/mol
(B) \(6.47 \times 10^{45}\) g/mol
(C) \(6.02 \times 10^{23}\) g/mol
(D) \(9.31 \times 10^{-23}\) g/mol

相關試題

相關試卷

9. Calculate the molar mass of a sample with a single molecule weighs \(9.31 \times 10^{-23}\) g.(A) 56.1 g/mol(B) \(6.47 \times 10^{45}\) g/mol(C) \(6.02 \times 10^{23}\) g/mol(D) \(9.31 \times 10^{-23}\) g/mol

相關試題

相關試卷

9. Calculate the molar mass of a sample with a single molecule weighs \(9.31 \times 10^{-23}\) g.
(A) 56.1 g/mol
(B) \(6.47 \times 10^{45}\) g/mol
(C) \(6.02 \times 10^{23}\) g/mol
(D) \(9.31 \times 10^{-23}\) g/mol