(1)使用灭火器时,只需将装置倒置,浓盐酸与碳酸钠反应后喷出大量含有的泡沫,当泡沫“粘附”在燃烧物表面后,起到隔绝
(2)制作成本也是须考虑的重要指标。将含有10.6克溶质的饱和碳酸钠溶液装入吸滤瓶,理论上需要质量分数为36.5%的浓盐酸多少克,才能恰好完全反应
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