(1)将鸡蛋放入密度为1.03克/厘米3的食盐溶液中,松手后若鸡蛋
(2)配制密度为1.03克/厘米3的食盐溶液可将60克食盐溶于1000毫升的水中,实验室在配制以上食盐溶液时,操作步骤如图乙所示,正确的操作顺序是
(3)下列情况会导致食盐溶液的溶质质量分数偏大的是
①量取水时俯视读数
②量筒中的水倒入烧杯中时,有部分残留
③食盐不纯,含有杂质
④取用已配制好的食盐溶液时,有少量溶液洒在瓶外
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