I. CÁC GIẢI PHÁP THỰC HIỆN:  !"#$ %#&' ($)* +,"#-.$$  +,"#-.$#$  +,"#/01 +,"#/0234 +,"#/0"!5605/2 7835 )#96:* ;861"* <1"#=36> <1"!$$3?: <1"@/ ;83*82?A#BA$ #$ $1 16C61 ;8-*D?$3?:2C6EC6$FG II. CÁC BIỆN PHÁP TỔ CHỨC THỰC HIỆN @,HIJKLJMNOJOPQ8RNSJOT8OU@OV8* 1. Tính % về khối lượng của nguyên tố trong hợp chất AxBy hoặc AxByCz 8)W45* 8*;J3?:$#BA@X,$Y@X,8Z ;[#\* E@]X^@^@X,X__E` E,]^,^@X,X__E !,"#/"\* Đề bài*J4#=E3?:a?$:#288Qb , ;J43?:$*^88Qb]c_+7+debf]__df ;J#=E/03?:?* E8]c___X__E]c_E E8]7__X__E]7E EQ]be__X__E]c&E$YEQ]__;dc_+7f]c&E 2. Tính khối lượng của nguyên tố trong a (gam) hợp chất AxBy hoặc AxByCz a. Cơ sở lí thuyết : 8*;J3?:$#BA@X,$Y@X,8Z ;#\* @]X^@^@X,X` ,]^,^@X,X $Y,];@ b. Bài tập vận dụng : Đề bài*J43?:a?N/?Q$g_N78Qb ,* J43?:$*^N78Qb]77b+7+eb]_e N]77b_eXg_]7eh Q]be_eXg_]77ec 3. Tìm công thức hóa học : 3.1. Bài tập m nguyên tố : 8)W45* ij/$)W45k360!$6(-3?:$a?l6'X616: ?=m !,"#/"\* <0!*QXa3$nW'12#77geEQX/oa3$6'W'1$ g_c&EQXOpX613$n , <Y7$Xn7QX/n7Q J'q*eX7n]77gerrccdIf e7n]g_c&che7dIIf JldIf/dIIf]sX]bg N5*X]t]bgd$f X]7t]r O$X6'nQ/n7Qr J$#BAnQ$X577geE*en]77gerrcc D*n]gch7ugg v"n^ 3.2 . Bài tập xác định công thức phân tử của hợp chất vô cơ w61' a:#23!5#=E?$Yq3?: ?* 8)W45* ;N560!3$k3^d3?:$f S =m*@X,$Y@X,8ZdXZf Jq3?:?* X**Z]$F$@^@*$F$,^,*$F$8^8 $Y]@^@*,^,*8^8 ]*!*dq)?f 8' *@,!8 ;N560!$k3^ S =m*@X,$Y@X,8ZdXZf J'q3?:?* ^@X$F$@]^,$F$,]^8Z$F$8]^@X,8Z__ SmXZ 8xy*;N560!3$k3^*<Yq ;N560!'k3^*<Yq  !,"#/"\* <0!*^:#2'#=E/03?:?*r_Ez.b_EQOpX61 ' a:#26' ,* 8xy*<B!3$k3^ S :#2*z.XQ J'q*X*]r_ge*b_e  ]7g*&rg ]*g]7*b v":#2*z.7Qb . : 8*;J3?:$#BA@X,$Y@X,8Z ;#* @]X^@^@X,X` ,]^,^@X,X $Y,];@ b. Bài tập vận dụng : Đề bài *J43?:a?N/?Q$g_N78Qb ,* J43?:$*^N78Qb]77b+7+eb]_e N]77b_eXg_]7eh Q]be_eXg_]77ec 3 bài *J43?:a?N/?Q$g_N78Qb ,* J43?:$*^N78Qb]77b+7+eb]_e N]77b_eXg_]7eh Q]be_eXg_]77ec 3. Tìm công thức hóa học : 3.1. 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