107年 - 107 東吳大學_暑假轉學生招生考試_化學系二年級：普通化學#105770

選擇題 (10)

1.Which of the following represents the largest mass? (A) 2.0 x 10² mg (B) 0.0010 kg (C) 1.0 x 10⁵ ng (D)2.0 x 10² cg (E) 10.0 dg

2.An atom of the isotope chlorine-37 consists of how many protons, neutrons, and electrons? (p = proton, n = neutron, e = electron) (A) 17 p, 18 n, 17 e (B) 17 p, 20 n, 17 e (C) 17 p, 20 n, 7 e (D)17 p, 37 n, 17 e (E) 20 p, 17 n, 20 e

3.Which is the correct formula for copper(II) phosphate? (A) Cu₂PO₄(B) Cu₃(PO₄)₂ (C) Cu₂PO₃ (D)Cu(PO₄)₂ (E) Cu(PO₃)₂

4.Based on the solubility rules, which one of the following should be soluble in water? (A) AgBr (B) AgCl (C) Ag₂CO₃ (D)AgNO₃ (E) Ag₂S

5.Calculate the volume occupied by 25.2 g of CO₂ (F. W. = 44.011) at 0.84 atm and 25°C. R = 0.08206 L atm/K mol. (A) 0.060 L (B) 1.34 L (C) 16.7 L (D)24.2 L (E) 734 L

6.Calculate the wavelength of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level. For hydrogen J(1/n² ), C = 3 x10⁸ m/s, h = 6.626 x JS. (A) 97.3 nm (B) 82.6 nm (C) 365 nm (D)0.612 nm (E) 6.8 nm

7.The geometry of the SF₄ molecule is (A) tetrahedral. (B) trigonal pyramidal. (C) trigonal planar. (D)square planar. (E) seesaw.

8. Platinum(A. W. = 195.1) has a face-centered cubic crystal structure and a density of 21.5 g/cm³ . What is the radius of the platinum atom? () (A) 69 pm (B) 98 pm (C) 139 pm (D)196 pm (E) 277 pm