38. How many milliliters of 18.4 M H2SO4 are needed to prepare 600.0 mL of 0.10 M H2SO4?(A)1.8 mL(B)
39. One mole of an ideal gas is expanded from a volume of 1.00 L to a volume of 10.00 L against a co
40. For the process CHCl3(s) → CHCl3(l), ΔH° = 9.2 kJ/mol and ΔS° = 43.9 J/molK. What is the meltin
41. Which of the following represents a conjugate acid-base pair?(A)H2PO4– and PO43-(B)HSO4– and SO3
42. A synchronous satellite revolves around the Earth in acircular orbit.(A)Its acceleration is zero
43. A 1200 kg car is moving with a speed of (11i + 6.2j ) m/s. What is the magnitude of its momentum
44. A planet has the same mass as the Earth. It also has a radius twice the Earth’s radius. If the E
45. A sound wave can be described as a(A) pressure wave.(B) displacement wave.(C) transverse wave.(D
46. The single temperature and pressure at which water, ice,and water vapor can co-exist in equilibr
49. An electron is located on the Earth’s magnetic equator at 1000 m altitude. In which direction wi
50. When a charged particle is accelerated it radiates(A)waves that have the particle’s velocity.(B)
3. 2 mol理想氣體於1atm及2atm下,其體積V(升)與溫度t(℃)之關係式為V=a1 t + b1(壓力1atm時)V=a2 t + b2(壓力2atm時);式中常數a1、a2、b1、b2之
4. 只用一種試劑即能將:1.Al3+與Fe3+,2.K+與Mg2+,3.Cu+與Ba2+,4.Ag+與Al3+四組中各對離子分離(即令一種離子沈澱但另一種離子留在溶液中)的是:(A) NaNO3(a
6. 取強酸型陽離子交換樹脂(RH),再將100毫升0.01M Mg2+的中性溶液通過該樹脂予以軟化,使Mg2+完全被樹脂所交換,則該交換後的溶液其pH值為多少? (A) 1.7 (B) 2.0 (C
7. 已知CO(g)、H2(g)、CH3OH(1)之生成熱分別為x、y、z kJ / mol,燃燒熱分別為-a、-b、-c kJ / mol;又已知CO(g)+2H2(g) →CH3OH(1),則:(
9. 在27℃,1 atm條件下,以排水集氣法收集到一瓶氧氣,此時瓶內水面低於瓶外水面13.6 cm,有關瓶內氣體的敘述,下列敘述何者錯誤?( 27℃水之飽和蒸氣壓為25 mmHg,汞的密度為13.6