50.e-GNSS為 內政部國土測繪 中心建構之 高精度之 電子化全球衛星即時動態定位 系統
名稱 ,請 問不含哪 一個 系統?

(A)GL0
(B) GAL
(C) BGS
(D) GPS

1. Avogadro's hypothesis states that: (A) Each atom of oxygen is 16 times more massive than an atom of hydrogen. (B) A given compound always contains exactly the same proportion of elements by mass. (C) When two elements form a series of compounds, the ratios of masses that combine with 1 gram of the first element can always be reduced to small whole numbers. (D) At the same temperature and pressure, equal volumes of different gases contain an equal number of particles. (E) Mass is neither created nor destroyed in a chemical reaction.

2. Consider an atom traveling at 1% of the speed of light. The de Broglie wavelength is found to be 4.15 x 10^-3 pm. Which element is this? (h=6.626 x 10^-34 J-s) (A) He (B) S (C) F (D) Cu (E) P

3. The electron configuration for the carbon atom is: (A) 1s^2 2s^2 2p^2 (B) [He]2s^4 (C) [Ne]2s^2 2p^2 (D) 1s^2 2p^4 (E) none of these

4. In the gaseous phase, which of the following diatomic molecules would be the most polar? (A) CsF (B) CsCl (C) NaCl (D) NaF (E) LiF

5. All of the following are in aqueous solution. Which is incorrectly named? (A) H2SO4 sulfuric acid (B) H2CO3, carbonic acid (C) H3PO4 phosphoric acid (D) HCN, cyanic acid (E) HCl, hydrochloric acid

6. The molecular structure of NO3- is (A) linear (B) trigonal planar (C) tetrahedral (D) bent (E) none of these

7. The fact that O2 is paramagnetic can be explained by (A) the Lewis structure of O2 (B) resonance (C) a violation of the octet rule (D) the molecular orbital diagram for O2 (E) hybridization of atomic orbitals in O2

8. According to the first law of thermodynamics, the energy of the universe is constant. Does this mean that ΔE is always equal to zero? (A) Yes, ΔE = 0 at all times, which is why q = -w. (B) No, ΔE does not always equal zero, but this is only due to factors like friction and heat. (C) No, ΔE does not always equal zero because it refers to the system's internal energy, which is affected by heat and work. (D) No, ΔE never equals zero because work is always being done on the system or by the system. (E) No, ΔE never equals zero because energy is always flowing between the system and surroundings.

9. Consider the following processes: ΔH (kJ/mol) 3B → 2C + D -125. (1/2)A → B 150 E + A → D 350 Calculate ΔH for: B → E + 2C (A) 25 kJ/mol (B) 525 kJ/mol (C) -175 kJ/mol (D) -325 kJ/mol (E) none of these

10. Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? (A) 3 atm (B) 5.5 atm (C) 6.4 atm (D) 12 atm (E) 15 atm

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