求下列物质中的氧原子的微粒个数:
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求下列物质中的氧原子的微粒个数:
①0.25mol的H2SO4:_______个 ②3.01×10^23个的Al(OH)3:_______个 ③8g的O2:_______个 ④标准状况下,11.2L的O3:_______个
①0.25mol的H2SO4:_______个 ②3.01×10^23个的Al(OH)3:_______个 ③8g的O2:_______个 ④标准状况下,11.2L的O3:_______个
① nO = 0.25mol × 4 = 1 mol
② n Al(OH)3 = 3.01 × 10 ^ 23 /(6.02 × 10 ^ 23)mol
= 0.5 mol
n O = 0.5 mol × 3 = 1.5 mol
③ n O2 = 8 g /(16 g / mol)= 0.5 mol
n O = 0.5 mol × 2 = 1 mol
④ n O3 = 11.2L / (22.4 L / mol)= 0.5 mol
n O = 0.5 mol × 3 = 1.5 mol
② n Al(OH)3 = 3.01 × 10 ^ 23 /(6.02 × 10 ^ 23)mol
= 0.5 mol
n O = 0.5 mol × 3 = 1.5 mol
③ n O2 = 8 g /(16 g / mol)= 0.5 mol
n O = 0.5 mol × 2 = 1 mol
④ n O3 = 11.2L / (22.4 L / mol)= 0.5 mol
n O = 0.5 mol × 3 = 1.5 mol