Monochromatic radiation provides a distinct clarity to the rich peak structure in the valence band of sodium polyphosphate due to the absence of interfering x-ray satellites from the intense O 2s region. The features seen in the valence band are unique to the (P4O12)4− ion and therefore ...
指出下列各种磷酸中P的氧化数。(H3PO4, H4P2O7, H5P3O10, H6P4O13, H3P3O9, H4P4O12, H4P2O6, H2PH
结果1 题目指出下列各类磷酸中P的氧化数。 H3PO4, H4P2O7, H5P3O10, H6P4O13, H3P3O9, H4P4O12, H4P2O6, H3PO3, HPH2O2, H3PO5, H4P2O8,相关知识点: 试题来源: 解析 答:+5,+5,+5,+5,+5,+5,+4,+3,+1,+7,+6。反馈 收藏 ...
A new organic-cation phosphate of C10H28N4P4O12·4H2O has been obtained. The crystal structure determination shows that this compound crystallizes in the triclinic system, space group P−1, with the following unit cell parameters: a=9.147(3) Å; b=9.258(3) Å; c=8.974(3) Å; α...
①P4(白磷,s)+5O2(g)=P4O10(s) ΔH1=-2 983.2 kJ/mol ②P(红磷,s)+O2(g)=P4O10(s) ΔH2=-738.5 kJ/mol (1)试写出白磷转化为红磷的热化学方程式:。 (2)相同的状况下,白磷与红磷能量较低的是:;白磷的稳定性比红磷:(填“高”或“低”)。
(1)白磷为4个P原子组成的分子晶体,在空间呈正四面体结构,有六条棱,P4O10分子中的每条P―P键中都插入了一个O,因此每个P4O10分子中含有P―O―P结构的数目为6。故选B。 (2)选项C肯定不对,因为要生成H3PO4的话,1molP4O10需要6molH2O,现1molP4O10只结合4molH2O,其结果相当于4molH3PO4中要失去2mol...
Single crystals of the new compounds Li 6[(UO 2) 12(PO 4) 8(P 4O 13)] (1), Li 5[(UO 2) 13(AsO 4) 9(As 2O 7)] (2), Li[(UO 2) 4(AsO 4) 3] (3) and Li 3[(UO 2) 7(AsO 4) 5O)] (4) have been prepared using high-temperature solid state reactions. The cry...
指出下列各种磷酸中P的氧化数。H3PO4,H4P2O7,H5P3O10,H6P4O13,H3P3O9,H4P4O12,H4P2O6,H2PHO3,HPH2O2,H3PO5,H4P2O8,请帮忙给出正确答案和分析,谢谢!
P4为正四面体结构,则1个P4分子有6个P-P键,则:124g/(124g.mol-1) ×NA×6="6" NA,故A错误; B、在石墨中每个C与另外3个C相连,每个C形成3/2个C-C键,因此是3/2NA个,不是3NA个; C:金刚石中每个C都与另外4个C相连,每个C-C键中有2个价电子,而12g即1molC有4mol电子,因此C-C键有2mol即2NA...
7.设A,B是半径为3的球体O表面上两定点,且∠AOB =00,球体O表面上动点P满足|P4|=2|PB|则点P的轨迹长度为()(12√(11))/(11) (+√(15