油墨粘到皮肤不正确的处理步骤:()
A、用干布擦拭
B、用少量的清洗剂擦拭
C、直接用水冲洗
D、用肥皂清洗
参考答案:C
将密度为1.14g/cm3的H2SO4溶液75mL倒入烧杯置于托盘天平的左盘上,在天平右盘加砝码使天平平衡.然后向烧杯中加锌片若干,反应停止后取出剩余锌片,向天平右盘添加11.0g砝码,天平又达到平衡.另外称得上述剩余锌片的质量为1.65g.
(1)倒入烧杯中的硫酸溶液质量为______g,反应完后溶液增重了______g
(2)最初放入烧杯中锌片的质量是______g
(3)反应完后所得溶液溶质的质量分数是多少?
It is apparent that there was not sufficient depth of water()and I claim that the estimated arrival draft as radioed to the agent to report to you was a close one.
A.for my vessel crossing safely
B.my vessel is to cross safely
C.for my vessel to cross safely
D.for my vessel's crossing safely