發問時間: 科學化學 · 1 0 年前

轉學考普通化學台大93 普化B

2. Which of the following is NOT the correct chemical formula for

the compound named?

(a)hydrocyanic acid HCN (b)calcium sulfate CaSo4

(c)beryllium oxide BeO (d)nickel(Ⅱ) peroxide Ni2()

(e)ammonium chromate (NH4)2CrO4

4. Balance the reaction below in acidic solution

IO3- + I → I2

What volume of 0.352M HCL is needed to produce 2.48*10^-3

moles of iodine , I2, with an excess of KIO3 and KI?

(a)2.48ml (b)4.96ml (c)7.05ml (d)14.1ml (e)none of these

5. Which of the following relations is correct?

(a)H=E-PV (b)H=G-TS (c)for a irreversible change dS2 < dq/T

(d)for a reversible change dS1=dH(sys)

(e)for and irrversible change △S1 + △S2 = 0

(f)at the phase transition △S1 = △H/T

※ S1 = S(sys) S2 = S(surr)

6. Oxygen gas. generated by the reaction2KClO3(S) → 2KCl(S)+3O2(g).

is collected over water at 27 C in a 2.00-l. vessel at a total

pressure of 760. torr.(The vapor pressure of H2O at 27 C is 26.0torr.)

How many moles of KClO3 were consumed in the reaction ?

(a)0.0790moles (b)0.119moles (c)0.0527moles

(d)0.0813moles (e)none of these

1 個解答

評分
  • Leonis
    Lv 5
    1 0 年前
    最佳解答

    2. Which of the following is NOT the correct chemical formula for

    the compound named?

    (a)hydrocyanic acid HCN (b)calcium sulfate CaSo4

    (c)beryllium oxide BeO (d)nickel(Ⅱ) peroxide Ni2()

    (e)ammonium chromate (NH4)2CrO4

    Ans:(d)nickel(Ⅱ) peroxide Ni2()----->X

    應該是NiO

    參考資料: Me
還有問題?馬上發問,尋求解答。