(1)H可与N形成多种分子,其中某分子含18个e-、6个原子,则该分子的结构式为
(2)工业上用C和H2O制取H2。已知:
①C(s) + H2O(g) = H2(g) + CO(g) ΔH1
②C(s) + 2H2O(g) = 2H2(g) + CO2(g) ΔH2
则CO(s) + H2O(g) = H2(g) + CO2(g) ΔH =
(3)NaBH4是一种重要的储氢载体。
①B在元素周期表中的位置为
②NaBH4(s)与H2O (l)反应生成NaBO2(s)和一种气体,在25℃,101kPa下,已知每消耗3.8g NaBH4放热21.6kJ,则该反应的热化学方程式为

同类型试题

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2


y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

