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65%的浓硝酸怎么稀释成5%浓硝酸,2%浓硝酸,1%浓硝酸（加多少克硝酸,加多少克水）或体积比.写的详细一点谢看不懂 99%的浓硝酸需要加多少水才能成稀硝酸急 几道初中英语单项选择,解析,I think Mrs．Black will come to help us with the celebration if she ____D__ too busy tomorrow．A．is B．will be C．won’t be D．isn’t．Look,it’s raining____C__．All of us can______ go home now．A． 45%的硝酸需要多少公斤60%的硝酸和多少公斤水可以配置成功?求大师指导,需要9公斤45%的硝酸，要多少公斤60%的硝酸和多少公斤水可以配置成功？求大师指导， 初中英语为什么这道题选D不选C 初中英语单项选择1.Teenagers aren’t_________ to get their ears________.A.allowed,pierced B.allow,pierce C.allowed,to pierce D.allow,pierce2.He _________ take a waik after supper when he was in the countryside.Now he gets used to _________ a 单项选择.1.I won't go to Ann's birthday party this coming Saturday.----___you tlod me you would.What's happening.A.But B.So C.And2.___Have finished the work can leave.A.Those who B.Anyone C.The one who3.I arrived at the airport___the plane had ta 初中英语单项选择2个The boy --I talked with just now is my best frend'A who B which C where D whomHow is the man ---lives next door?Oh,he is very strange.好多题都是这样的,如何做呢还有一个not any more和not any longer 的区别 初中英语单项选择!1.Don't smoke in the room,_____ Sure.I'm sorry.a.won't you b.will you c.don't you d.do y0u2.Don't touch the papers.Centainly ,I'll not _____ the papers be the touched.a.make b.get c.let d.allow如果好的话有追加! 5%mol/l硝酸怎么配制 1.—Can you guess what Mom will say on my first day to school?—Walk _______ home and don't play on the road.A.straight B.on C.fast D.along2.—Is Tom in Mr Clark's office—Yes,it is.Mr Clerk might have something to __________A.think about B.think 请问试剂及的硝酸怎么配制能成比重1.5的硝酸?比如10毫升酸该加多少水或别的东西才是1.5比重的硝酸? 初中英语单项选择-If you don't go to Lucy's birthday party this evening.( )-What a shame! She must be very sad if you don't appear.A.So do I B.neither will I C.So will I D.neither do I说明白原因. 比重为1.5的硝酸是怎么说的?该怎么配制? 英语翻译我暑假里的一天在暑假的早上,我9：00——10：00起床.然后,刷牙,洗脸还有吃早饭.接着,我写作业或者读书.在12：00,我吃中午饭.饭后,我开始玩电脑游戏,很无聊.我写了一会作业后,我出 请问试剂及的硝酸怎么配制能成为比重1.5的硝酸?比如10毫升硝酸该加多少水或别的东西才是1.5比重的 硝酸? 如何翻译给本的礼物(翻译成英文） 许多礼物翻译英语 如何用浓硫酸：硝酸摩尔浓度之比为2.5:1 配制pH为4的水10L 用浓度98%、密度1.84g/ml硫酸和浓度68%、密度1.4g/ml硝酸,配制成100L、pH2.5、硫酸硝酸体积比8:1的溶液,求各需多少体积硫酸和硝酸? 一公斤水加多少克硝酸PH=2在一公斤蒸馏水里,加多少克硝酸 PH值可以到2. 往500ml水里加多少GR纯硝酸,使ph等于2? 请问这道题怎么写呢?2 第二题怎么写 高2物理题详细一点哦.谢了质量为5t的汽车.在平直公路上以60kw的恒定功率从静止开始运动,速度达到24m/s后匀速运动,接着关闭发动机,已知汽车从启动到最后停下通过的总位移为1200m,设运动过 小D我急用 求拉~是8年纪题帮忙的在加50 了现在急用 要光以前的～ 2x³-3x²+1怎么解 求解2x³-3x²+=02x³-3x²+1=0 足量铁和稀硝酸反应的离子方程式? 物理振动学题目两个同方向（沿OX轴）、同频率同振幅的简谐运动,第一个的振动方向为X1=ACOS（wt+[圆里有一竖]1）,当振动物体处在X1=A处时,第二个振动物体在X2=-A/2处,且向OX轴正向运动,用旋转 铁与极稀的硝酸反应方程式 汽车以恒定的速率饶圆形广场一周用2min的时间,汽车每行使半周,速度方向改变多少度?汽车每行使10s.速度方向改变多少度?画出汽车在相隔10s的两个位置处的速度矢量的示意图（帮我讲下怎么