Question

£¨1£©³£ÎÂÏ£¬½«20.0 g 14%µÄNaClÈÜÒº¸ú30.0 g 24%µÄNaClÈÜÒº»ìºÏ£¬µÃµ½ÃܶÈΪ1.17 g/cm³µÄ»ìºÏÈÜÒº,¸Ã»ìºÏÈÜÒºÖÐNaClµÄÎïÖʵÄÁ¿Å¨¶ÈΪ                   mol/L¡£

£¨2£©ÇâÆøÊÇÐÂÐÍÇå½àÄÜÔ´£¬ï磨La£©ºÍÄø£¨Ni£©µÄºÏ½ð¿É×ö´¢Çâ²ÄÁÏ¡£ÓÒͼΪ¸ÃºÏ½ðµÄ¾§Ìå½á¹¹ÖÐ×îСµÄÖظ´½á¹¹µ¥Ôª£¬ÆäÖÐÐÄÓÐÒ»¸öÄøÔ­×Ó£¬ÆäËûÄøÔ­×Ó¶¼ÔÚÃæÉÏ£¬ïçÔ­×Ó¶¼ÔÚ¶¥µãÉÏ¡£¸Ã¾§ÌåµÄ»¯Ñ§Ê½Îª                   ¡£
£¨3£©º¬µª·ÏË®½øÈëË®Ìå¶ø¶Ô»·¾³Ôì³ÉµÄÎÛȾԽÀ´Ô½ÑÏÖØ£¬»·¾³×¨¼ÒÈÏΪ¿ÉÒÔÓýðÊôþ½«Ë®ÌåÖеÄNO»¹Ô­ÎªN₂£¬´Ó¶øÏû³ýÎÛȾ¡£
¢Ùд³öþºÍº¬µª·ÏË®·´Ó¦µÄÀë×Ó·½³Ìʽ                                       £»
¢ÚÉÏÊö·´Ó¦ÖУ¬Éú³É±ê×¼×´¿öÏÂ33£®6LµªÆøʱ£¬×ªÒƵç×ÓµÄÎïÖʵÄÁ¿Îª          mol¡£¢ÛÒÑÖª½ðÊôþ¿ÉÒÔ´Óº£Ë®ÖÐÌáÈ¡µÄMgCI₂ͨ¹ýµç½âÖƵõģ¬ÈôÒª³ýÈ¥º¬µªÔªËØ0.3molµÄ·ÏË®ÖеÄNO£¬ÔòÖÁÉÙÐèÒªº¬0.5%£¨ÖÊÁ¿·ÖÊý£©MgCl₂µÄº£Ë®              kg¡£

Answer 1

£¨1£©4.0
£¨2£© LaNi₅»òNi₅La
£¨3£©¢Ù2NO+5Mg+6H₂O =N₂¡ü+5Mg£¨OH£©₂+2OH^-               
¢Ú15                    
¢Û14£®25

ÂÔ