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設 O2& shy ;（氧氣）和 CH4（甲烷）的重量均為 m。 O& shy ;2 的莫耳數 = m...m/16 mol O2 所佔的莫耳分數 = (m/32) / [(m/32) + (m/16)]= 1/3 O2& shy ; 的分壓 = 450 x (1/3) = 150 mmHg

1. 2C2H& shy ;6 + 7O2 → 4CO2 + 6H2O Steps: (1) Write all... + H2O (2) Make 2 C on both sides: 1C2H& shy ;6 + O2 → 2CO2 + H2O (3) Make 6 H on both...

(a) BeCl2 and AlCl3& shy ; are covalent compounds. (b) Both BeCl3& shy ; and ...moment of AlCl3 molecule is also 0. Therefore, AlCl3& shy ; molecule is non-polar.

Chemical equation: 2HCl& shy ; (aq) + 2NaOCl & shy ;(aq) → 2NaCl & shy ;(aq)& shy ; + Cl& shy ;2...

1a. 2CuSO4 → 2CuO + 2SO& shy ;2 + O2 1b.(i) CuSO4 的摩爾質量 = 63.5 + 32...體積 = 24 dm3 2CuSO4 → 2CuO + 2SO& shy ;2 + O2 摩爾比 CuSO4 : SO2 = 2 : 2 = 1...

已知： H2(g) + (1/2)O2& shy ;(g) → H2O(l) .. ΔH = -285.8 kJ 2H2O& shy ;2(l...液態水時放出能量 = 196.4 / 68 = 2.89 kJ 2. H2(g) + (1/2)O2& shy ;(g) → H2O(l) .. ΔH = -285.8 kJ H2O(l) + (1/2...

Let Ym& shy ;On be the required empirical formula. Molar mass...molar mass) = 0.103 x 16 = 1.65 g In 8.38 g of Ym& shy ;On : Mass of O = 1.65 g Mass of ...

SO2& shy ; can decolorize acidified KMnO4 solution. The reaction is...