1.Hydrogen cyanide is produced industrially from the reactio

kkataizi2022-10-04 11:39:541条回答

1.Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia,oxygen,and methane.
2 NH3(g) + 3 O2(g) + 2 CH4(g) → 2 HCN(g) + 6 H2O(g)
If 5.35 103 kg each of NH3,O2,and CH4 are reacted,what mass of HCN and of H2O will be produced,assuming 100% yield?
2.The element rhenium (Re) has two naturally occurring isotopes,185Re and 187Re,with an average atomic mass of 186.207 amu.Rhenium is 62.60% 187Re,and the atomic mass of 187Re is 186.956 amu.Calculate the mass of 185Re.(Give your answer to 3 decimal places.)

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Kar雯 共回答了23个问题 | 采纳率91.3%
1.
5 kg NH3 ===>5000/17 = 294.1 mol,
35 kg O2 ===>35000/32= 1094 mol
103 kg CH4 ===>103000/16=6437.5 mol
NH3 is the limiting reagent.
mass of HCN =294.1x27 =7974 g =7.974 kg
mass of H2O =294.1x6x18/2= 5081 g =5.081 kg
2.
186.207=62.60% x 186.956 + 37.40%X
find X (!),and it will be your answer.
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n(O)=[m(总)-m(H)-m(C)]/M(O)=3.64*10^(-4)mol
n(化合物)=0.01068/176.1=0.61*10^(-4)mol
n(化合物):n(C):n(H):n(O)
=1:6:8:6
分子式为:C6H8O6
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom),它在原子核物理的研究中有重要作用。
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom),它在原子核物理的研究中有重要作用。图为μ氢原子的能级示意图。假定光子能量为E的一束光照射容器中大量处于n=2能级的μ氢原子,μ氢原子吸收光子后,发出频率为г 1 、г 2 、г 3 、г 4 、г 5 和г 6 的光,且频率依次增大,则E等于
[ ]
A、h(г 3 -г 1
B、h(г 5 +г 6
C、hг 3
D、hг 4
ray08020001年前1
小哈的弓箭 共回答了16个问题 | 采纳率93.8%
C
英语翻译Hydrogen is the fundamental element of the universe in t
英语翻译
Hydrogen is the fundamental element of the universe in that it provides the building blocks form which the other elements are produced.
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氢是宇宙中的最根本的要素之一,它提供了其他元素构建的形式
英语翻译what dose "the first of up to five hydrogen buses"'mean?
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最近这个城市的交通运输工程首先推出了五部氢能源巴士
英语翻译属于英语专业词汇 前面是1-ethyi-6-fluorine-1,4 dihydrogen..后面的不会了
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accidal;norfloxacin;1-Ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-3-quinolinecarboxylic acid
hydrogen bonding 求解释及用法
hydrogen bonding 求解释及用法
化学中的一种力,但是我不知道它的翻译是什么.请问谁能帮我解释一下,它的中文意思,以及具体的作用及在化学中对沸点的影响.----------------------------------------JL_Ben
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氢键 Hydrogen Bonding
与负电性大的原子X(氟、氯、氧、氮等)共价结合的氢,如与负电性大的原子Y(与X相同的也可以)接近,在X与Y之间以氢为媒介,生成X-H…Y形的键.这种键称为氢键.氢键的结合能是2—8千卡(Kcal).因多数氢键的共同作用,所以非常稳定.在a-螺旋的情况下是N-H…O型的氢键,DNA的双螺旋情况下是N-H…O,N-H…N型的氢键,因为这样氢键很多,因此这些结构是稳定的,此外,水和其他溶媒是异质的,也由于在水分子间生成O-H…O型氢键.因此,这也就成为疏水结合形成的原因.
英语翻译He was considered a suspect,as were hydrogen sulfide fum
英语翻译
He was considered a suspect,as were hydrogen sulfide fumes exuded from mangroves near the river.
请问这里as 为什么用倒装的?
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他被怀疑是一名嫌疑犯,因为人们看到有硫化氢的浓烟从靠近河边的红树林中散出.
as were不是词组,as是连词,引导从句,译为:因为.
之所以倒装是为了强调主语,一般来讲,所有倒装都是为了强调一部分句子结构.
Hydrogen and oxygen,( ) ,are gases
Hydrogen and oxygen,( ) ,are gases
A.such as B for example Cfor an instance Dtake for example
要理由
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luolise 共回答了22个问题 | 采纳率86.4%
B
C如果是for instance也可以.
B和C都可以放在句子中间,用逗号隔开
such as 后面直接跟名词
(2007•江苏)μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom
(2007•江苏)μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom),它在原子核物理的研究中有重要作用.图为μ氢原子的能级示意图.假定光子能量为E的一束光照射容器中大量处于n=2能级的μ氢原子,μ氢原子吸收光子后,发出频率为γ1、γ2、γ3、γ4、γ5、和γ6的光,且频率依次增大,则E等于(  )
A.h(γ31
B.h(γ56
C.hγ3
D.hγ4
郁闷的工作ing1年前1
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解题思路:μ子吸收能量后向高能级跃迁,而较高能级不稳定会自发的向所有的较低能级跃迁,只有跃迁到基态后才能稳定,故辐射光子的种类为
C
2
n
.能级差越大,辐射的光子的频率越高.

μ子吸收能量后从n=2能级跃迁到较高m能级,然后从m能级向较低能级跃迁,若从m能级向低能级跃迁时如果直接跃迁到基态n=1能级,则辐射的能量最大,否则跃迁到其它较低的激发态时μ子仍不稳定,将继续向基态和更低的激发态跃迁,即1、2、3…m任意两个轨道之间都可以产生一种频率的辐射光,
故总共可以产生的辐射光子的种类为
C2m=
m(m−1)
2=6,
解得m=4,
即μ子吸收能量后先从n=2能级跃迁到n=4能级,然后从n=4能级向低能级跃迁.
辐射光子的按能量从小到大的顺序排列为4能级到3能级,能级3到能级2,能级4到能级2,能级2到能级1,能级3到能级1,能级4到能级1.所以能量E与hν3相等.
故C正确.
故选C.

点评:
本题考点: 氢原子的能级公式和跃迁.

考点点评: 本题需要同学们理解μ子吸收能量后从较低能级跃迁到较高能级,而较高能级不稳定会自发的向较低能级跃迁,只有跃迁到基态后才能稳定,故辐射光子的种类为C2n,这是高考的重点,我们一定要熟练掌握.

英语翻译W:"They serve the purpose of changing hydrogen into brea
英语翻译
W:"They serve the purpose of changing hydrogen into breathable oxygen.And they're as necessary here as the air is,on Earth.”
M:"But I still say,they're flowers".
Woman:"If you like..."
Man:"Do you sell them?"
W:"I afraid not."
M:"But,maybe we could make a deal?"
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W:"它们(为我们)服务的目的是讲氢气转变成氧气.而且它们在地球上如同空气一样重要.
M:"不过我仍然要说,它们是花."
W:"如果你喜欢..."
M:"你要卖了它们吗?"
W:"恐怕我不是这样想的."
M:"那么,或许我们可以做成一笔交易."
Breaking up water into oxygen and hydrogen is a chemical cha
Breaking up water into oxygen and hydrogen is a chemical change.为什么change不是changing?
当change不当谓语动词时是不是就应该改为changing?
yuhuadong19853261年前1
tttuuu 共回答了20个问题 | 采纳率90%
change 本身既可以作为动词使用,也可以作为名词使用.在这里,因为有不定冠词"a",所以是做名词用.
英语翻译高分求一句话外文翻译,Fermentative hydrogen production by new marin
英语翻译
高分求一句话外文翻译,Fermentative hydrogen production by new marine Clostridium
amygdalinum strain C9 isolated from offshore crude oil pipeline.
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运用从海上原油管道分离出来的新的海洋梭菌配糖菌株C9发酵产氢
amygdalinum可能翻译不太准确
供参考
英语翻译the host through multiple CH-π hydrogen bonds and medium
英语翻译
the host through multiple CH-π hydrogen bonds and mediumrange dispersion-like interactions.We have shown20 that most of the previous functionals are problematic for describing this kind of noncovalent interactions.The ability of the new-generation M06-2X functional and its prototype,the M05-2X functional,to treat medium-range correlation energy and its effect on nonbonded interactions quantitatively18,20,21,26-30 open a new practical avenue for obtaining detailed information about and understanding of
supramolecular chemistry.
Table 1 shows that the binding energy for the C60@[6]CPPA complex is much greater than that of HMB@[6]CPPA.This is also in agreement with the experiments of Kawase et al.10,11 To understand the nature of the difference,we plotted in Figure 2 the supramolecular electrostatic potential calculated at the M06-2X/6-31+G(d,p) level.Figure 2 shows that there is an overlap of electron density between C60 and [6]CPPA,but no significant overlap occurs for HMB@[6]CPPA.
其中的数字如20 18,20,21,26-30 10,11 不用翻译
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billli916 共回答了20个问题 | 采纳率95%
这种专业翻译是超难的.另外,开头第一句不完整…the host through multiple CH-π hydrogen bonds and medium range dispersion-like interactions.We have shown20 that most of the previous functionals are probl...
hydrogen 和 atmosphere 应该怎么读,照音标读的和听得根本不一样,
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hydrogen 英音:['haidridʒən]美音:['haɪdrədʒən]
atmosphere 英音:['ætməsfiə]美音:['ætməs,fɪr]
你看看,有美音和英音两种读法,看你读的是哪一种?两种都是对的.
It is known that hydrogen _______ the lightest element.
It is known that hydrogen _______ the lightest element.
1 be
2 was
3 has been
4 is
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4
英语翻译1.The visible spectrum of the hydrogen atom consists of
英语翻译
1.The visible spectrum of the hydrogen atom consists of a series of lines that are randomly spaced.
2.When the elementsC,N and Si rae arranfed in order of increasing first ionization energy,Which is the correct order?
3.Which is a possible set of quantum number for a valence electron in ground state atom of phosphorus?
4.The hydrogen line spectrum provides evidence for the quantized nature of atomic energy states.
5.What is the number of unpaired electrons in a manganese atom in its lowest energy statea?
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1氢原子的可见光谱由一系列行是随机的间隔.
2.When的elementsC,氮,硅在提高评审工作arranfed第一电离能,这是正确的订单的订单?
那间是量子数在地面磷态原子价电子可能的呢?
四线谱氢原子提供了能态量子性质的证据.
5.What是未配对电子在锰原子数的最低能源statea?
朗读
1.氢原子的可见光谱由一系列不连续的线状光谱组成.
2.句子中rae arranfed in order of 应该有一些拼写问题,句子前面是指C、N和Si元素,后面提到了第一电离能.
3.哪一个(答案)可能是基态磷原子价子电的量子数的组成?
4.氢线光谱为原子能级的量子特性提供了证据.
5.锰原子处在最低能级时未成对的电子数目是多少?
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogenmuon atom),它在原子核物理的研究中有重
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogenmuon atom),它在原子核物理的研究中有重要作用.右图为μ氢原子的能级示意图.假定光子能量为E的一束光照射容器中大量处于n=2能级的μ氢原子,μ氢原子吸收光子后,发出频率为γ1、γ2、γ3、γ4、γ5、和γ6的光,且频率依次增大,则E等于(  )
A.h(γ31
B.h(γ56
C.hγ3
D.hγ4
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解题思路:μ子吸收能量后向高能级跃迁,而较高能级不稳定会自发的向所有的较低能级跃迁,只有跃迁到基态后才能稳定,故辐射光子的种类为C2n.能级差越大,辐射的光子的频率越高.

μ子吸收能量后从n=2能级跃迁到较高n能级,然后从m能级向较低能级跃迁,若从n能级向低能级跃迁时如果直接跃迁到基态n=1能级,则辐射的能量最大,否则跃迁到其它较低的激发态时μ子仍不稳定,将继续向基态和更低的激发态跃迁,即1、2、3…n任意两个轨道之间都可以产生一种频率的辐射光,
故总共可以产生的辐射光子的种类为
C2n=6,
解得n=4,即μ子吸收能量后先从n=2能级跃迁到n=4能级,然后从n=4能级向低能级跃迁.
辐射光子的按能量从小到大的顺序排列为4能级到3能级,能级3到能级2,能级4到能级2,能级2到能级1,能级3到能级1,能级4到能级1.所以能量E与hν3相等.
故C正确,ABD错误.
故选:C.

点评:
本题考点: 氢原子的能级公式和跃迁.

考点点评: 本题需要同学们理解μ子吸收能量后从较低能级跃迁到较高能级,而较高能级不稳定会自发的向较低能级跃迁,只有跃迁到基态后才能稳定,故辐射光子的种类为C2n,这是重点,我们一定要熟练掌握.

Hydrogen-burning怎么翻译?
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Hydrogen-burning:氢气燃烧,氢燃烧
hydrogen ['haidrədʒən]
n.[化学] 氢,氢气 氢原子 氢
楼上的,不要弄得像科学家,一个英语词汇解释而已.
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英语翻译23、Two atoms of hydrogen combine with one atom of oxygen
英语翻译
23、Two atoms of hydrogen combine with one atom of oxygen to form a molecule of water.
解释form的意思,然后标准翻译句子,
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两个氢原子和一个氧原子结合形成水分子.
FORM形式
how heavy is hydrogen gas
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英语翻译This type of weak attraction between the hydrogen atom o
英语翻译
This type of weak attraction between the hydrogen atom of one molecule and a slightly negative atom within another molecule is a type of chemical bond called a hydrogen bond
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与负电性大的原子共价结合的氢,与负电性大的原子接近时形成较弱作用的分子间作用力称为氢键.
下面是对氢键的一些介绍:
一、氢键的形成
1、同种分子之间
现以HF为例说明氢键的形成.在HF分子中,由于F的电负性(4.0)很大,共用电子对强烈偏向F原子一边,而H原子核外只有一个电子,其电子云向F原子偏移的结果,使得它几乎要呈质子状态.这个半径很小、无内层电子的带部分正电荷的氢原子,使附近另一个HF分子中含有孤电子对并带部分负电荷的F原子有可能充分靠近它,从而产生静电吸引作用.这个静电吸引作用力就是所谓氢键.
2、不同种分子之间
不仅同种分子之间可以存在氢键,某些不同种分子之间也可能形成氢键.例如 NH3与H2O之间.
3、氢键形成的条件
⑴ 与电负性很大的原子A 形成强极性键的氢原子 .
⑵ 较小半径、较大电负性、含孤电子对、带有部分负电荷的原子B (F、O、N)
氢键的本质:强极性键(A-H)上的氢核,与电负性很大的、含孤电子对并带有部分负电荷的原子B之间的静电引力.
⑶ 表示氢键结合的通式
氢键结合的情况如果写成通式,可用X-H…Y①表示.式中X和Y代表F,O,N等电负性大而原子半径较小的非金属原子.
X和Y可以是两种相同的元素,也可以是两种不同的元素.
⑷ 对氢键的理解
氢键存在虽然很普遍,对它的研究也在逐步深入,但是人们对氢键的定义至今仍有两种不同的理解.
第一种把X-H…Y整个结构叫氢键,因此氢键的键长就是指X与Y之间的距离,例如F-H…F的键长为255pm.
第二种把H…Y叫做氢键,这样H…F之间的距离163pm才算是氢键的键长.这种差别,我们在选用氢键键长数据时要加以注意.
不过,对氢键键能的理解上是一致的,都是指把X-H…Y-H分解成为HX和HY所需的能量.
(5)氢键的饱和性和方向性
氢键不同于范德华引力,它具有饱和性和方向性.由于氢原子特别小而原子A和B比较大,所以A—H中的氢原子只能和一个B原子结合形成氢键.同时由于负离子之间的相互排斥,另一个电负性大的原子B′就难于再接近氢原子.这就是氢键的饱和性.
氢键具有方向性则是由于电偶极矩A—H与原于B的相互作用,只有当A—H---B在同一条直线上时最强,同时原子B一般含有未共用电子对,在可能范围内氢键的方向和未共用电子对的对称轴一致,这样可使原于B中负电荷分布最多的部分最接近氢原子,这样形成的氢键最稳定.
二、氢键的强度
氢键的牢固程度——键强度也可以用键能来表示.粗略而言,氢键键能是指每拆开单位物质的量的H…Y键所需的能量.氢键的键能一般在42kJ·mol-1以下,比共价键的键能小得多,而与分子间力更为接近些.例如,水分子中共价键与氢键的键能是不同的.
而且,氢键的形成和破坏所需的活化能也小,加之其形成的空间条件较易出现,所以在物质不断运动情况下,氢键可以不断形成和断裂.
三、分子内氢键
某些分子内,例如HNO3、邻硝基苯酚分子可以形成分子内氢键.分子内氢键由于受环状结构的限制,X-H…Y往往不能在同一直线上.
四、氢键形成对物质性质的影响
氢键通常是物质在液态时形成的,但形成后有时也能继续存在于某些晶态甚至气态物质之中.例如在气态、液态和固态的HF中都有氢键存在.能够形成氢键的物质是很多的,如水、水合物、氨合物、无机酸和某些有机化合物.氢键的存在,影响到物质的某些性质.
1、熔点、沸点
分子间有氢键的物质熔化或气化时,除了要克服纯粹的分子间力外,还必须提高温度,额外地供应一份能量来破坏分子间的氢键,所以这些物质的熔点、沸点比同系列氢化物的熔点、沸点高.分子内生成氢键,熔、沸点常降低.例如有分子内氢键的邻硝基苯酚熔点(45℃)比有分子间氢键的间位熔点(96℃)和对位熔点(114℃)都低.
2、溶解度
在极性溶剂中,如果溶质分子与溶剂分子之间可以形成氢键,则溶质的溶解度增大.HF和NH3在水中的溶解度比较大,就是这个缘故.
3、粘度
分子间有氢键的液体,一般粘度较大.例如甘油、磷酸、浓硫酸等多羟基化合物,由于分子间可形成众多的氢键,这些物质通常为粘稠状液体.
4、密度
液体分子间若形成氢键,有可能发生缔合现象,例如液态HF,在通常条件下,除了正常简サ腍F分子外,还有通过氢键联系在一起的复杂分子(HF)n.nHF(HF)n .其中n可以是2,3,4….这种由若干个简单分子联成复杂分子而又不会改变原物质化学性质的现象,称为分子缔合.分子缔合的结果会影响液体的密度.
introduct hydrogen gas
introduct hydrogen gas
please help me to introduct hydrogen gas
zhuliang11年前5
乱求机把搞 共回答了16个问题 | 采纳率81.3%
哈哈,英文中文都有,楼主参考下哈
A colorless,highly flammable gaseous element,the lightest of all gases and the most abundant element in the universe,used in the production of synthetic ammonia and methanol,in petroleum refining,in the hydrogenation of organic materials,as a reducing atmosphere,in oxyhydrogen torches,and in rocket fuels.Atomic number 1; atomic weight 1.00797; melting point -259.14=C; boiling point -252.8=C; density at 0=C 0.08987 gram per liter; valence 1.See table at element
氢:一种无色,易燃的气体物质,在所有气体中最轻,而宇宙中最多用来生产合成氨和甲醇,提炼石油,氢化有机物质作为收缩的气体,用在氧氢焰熔接器和火箭燃料中.原子序数为1;原子量为1.00797;熔点为-259.14=C;沸点-252.8=C;零度时的密度是0.08987克/公升;原子价为1参见 element
Hydrogen is the lightest element with an atomic weight of 1.
Hydrogen is the lightest element with an atomic weight of 1.008 翻译这句。
新翌1年前2
独孤芳草 共回答了28个问题 | 采纳率82.1%
氢是最轻的元素的原子重量1.008
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom),它在原子核物理的研究中有重要作用,
μ子与氢原子核(质子)构成的原子称为μ氢原子(hydrogen muon atom),它在原子核物理的研究中有重要作用,下图为μ氢原子的能级示意图。假定光子能量为E的一束光照射容器中大量处于n=2能级的μ氢原子,μ氢原子吸收光子后,发出频率为v 1 、v 2 、v 3 、v 4 、v 5 和v 6 的光,且频率依次增大,则E等于
[ ]
A.h(v 3 -v 1 )
B.h(v 5 +v 6 )
C.hv 3
D.hv 4
hehe98761年前1
2005007 共回答了15个问题 | 采纳率86.7%
C
hydrogen前为什么不加the
yuyukang1年前1
lbzhuoya 共回答了15个问题 | 采纳率86.7%
氢;氢气,因为是一种化学专用名词,所以不用加定冠词the.
Hydrogen is a colourless gas that is the lightest and commonest element in the universe.
”They serve the purpose of changing hydrogen into breathable
”They serve the purpose of changing hydrogen into breathable oxygen,” “And they’re as necessary
江边草青青1年前1
我是谁不要紧 共回答了20个问题 | 采纳率85%
他们的作用就是把氢气转化为可呼吸的氧气.
并且他们很有必要.
一道初二主谓一致题.急4Water ________(consist)of hydrogen and oxygen
effye1年前3
dnahk 共回答了19个问题 | 采纳率84.2%
consists
1.The spectrum of the hydrogen atom in the visible range is
1.The spectrum of the hydrogen atom in the visible range is shown in the figure.Please figure out the formulation of these line as a function of wavelength.
氢原子的谱线我就不放上来了,波长是410.2,434.0,486.1,656.3/nm
其实这是量纲的计算吧?
zhangxiaoyun1年前1
lxdong_y 共回答了22个问题 | 采纳率95.5%
由H的光谱项公式,有
1/λ=R*(1/m^2-1/n^2),R为Rydberg常数,m,n为正整数,m