题目

阅读理解 On her first day in New York City, teaching students fromlow-income families at an after-school program, Alyssa Kapasi noticed so manykids were lining up for free sandwiches and fruit in the cafeteria. Many ofthese poor students don't get enough food to eat at home, so a free schoollunch or a free after-school meal might be the most food they would get allday. Kapasi, who graduated from private school, was shocked.Therefore, she was determined to help. “I want other kids to understand that ifthey meet a problem, they don't have to wait to be an adult to salve it,” saysKapasi. 氧化锌、氮化镓及新型多相催化剂组成的纳米材料能利用可见光分解水，生成氢气和氧气。Zn2+基态核外电子排布式为______________，其核外存在______________对自旋相反的电子。写出两个与水分子具有相同空间构型的分子和阴离子：__________，____________。水分子在特定条件下容易得到一个H+，形成水合氢离子（H3O+）。下列对上述过程的描述不合理的是______________（填序号）。A、氧原子的杂化类型发生了改变 B、微粒的空间构型发生了改变C、微粒的化学性质发生了改变 D、微粒中的键角发生了改变在冰晶体中，每个水分子与相邻的4个水分子形成氢键（如图甲），已知冰的升华热是+51kJmol-1，除氢键外，水分子间还存在范德华力（11kJmol-1），则冰晶体中氢键的键能是___________kJmol-1。氮化镓的晶体结构如图乙所示，其中氮原子的杂化轨道类型是______________；N、Ga原子之间存在配位键，该配位键中提供电子对的原子是______________；该晶体的化学式为______________。金刚砂（SiC）和氮化镓并称为第三代半导体材料的双雄，它与金刚石具有相似的晶体结构，试比较金刚石和金刚砂的熔点高低，并说明理由：__________________________。某种ZnO晶体的晶胞如图丙所示，Zn2+的配位数为_______________，其晶胞中Zn2+和O2-之间的距离为apm，列式表示该晶体的密度：____________gcm-3（不必计算结果）。