Question

СÃ÷½«14.4gº¬ÔÓÖʵĴ¿¼îÑùÆ·£¨Ì¼ËáÄÆÓëÂÈ»¯ÄƵĻìºÏÎÓë90gÏ¡ÑÎËáÏà»ìºÏ£¬Ç¡ºÃÍêÈ«·´Ó¦£¬²âµÃ·´Ó¦Éú³ÉÆøÌåµÄÖÊÁ¿£¨m£©Ó뷴Ӧʱ¼ä£¨t£©µÄÊý¾ÝÈçϱíËùʾ£º

·´Ó¦Ê±¼ät/s	t0	t1	t2	t3	t4	t5	t6	t 7
ÆøÌåÖÊÁ¿m/g	0	0.88	1.76	2.64	3.52	4.4	X	4.4

(26)                                                                                                                                                                                                                                                                ±íÖÐXµÄֵΪ        £»

(27)                                                                                                                                                                                                                                                                ¼ÆËãÑùÆ·ÖÐNaClµÄÖÊÁ¿£»

(28)                                                                                                                                                                                                                                                                ¼ÆËãÍêÈ«·´Ó¦ºóËùµÃÈÜÒºÖÐÈÜÖʵÄÖÊÁ¿·ÖÊý¡£

Answer 1

(1) 4.4£¨1·Ö£©

(2) Na₂CO₃ + 2HCl = 2NaCl + H₂O + CO₂¡ü

106            117         44

y              z          4.4g

    g   £¨1·Ö£©      

ÑùÆ·ÖÐm_(NaCl) = 14.4g ¨C 10.6g = 3.8g£¨1·Ö£©

(3)         £¨1·Ö£©

    11.7g + 3.8g = 15.5g£¨1·Ö£©

    £¨2·Ö£©