Câu 15: viết công thức hóa học của các chất sau và tính phân tử khối: a. Natri sunphat......................................................................................................... b. Magie sunphat....................................................................................................... c. Đồng nitrat............................................................................................................ d. Canxi hidroxit........................................................................................................ e. Sắt (III) Nitrat........................................................................................................ h. kẽm phốtphat......................................................................................................... k. Nhôm cacbonnat.................................................................................................... g. Nhômclorua........................................................................................................... n. Barisunphat........................................................................................................... m. Natricacbonnat..................................................................................................... o. Nhôm hiđroxit...................................................................................................... p. Kẽm hiđroxit........................................................................................................ z. Bari nitrat.............................................................................................................. v. Kẽm phôt phat...................................................................................................... u. Natri cacbonnat.....................................................................................................
2 câu trả lời
Đáp án:
Giải thích các bước giải:
$a) PTK_{Na_{2}SO_{4}} = 142 đvC$
$b) PTK_{MgSO_{4}} = 120 đvC$
$c) PTK_{Cu(NO_{3})_{2}} = 188 đvC$
$d) PTK_{Ca(OH)_{2}} = 74 đvC$
$e) PTK_{Fe(NO_{3})_{3}} = 242 đvC$
$h) PTK_{Zn_{3}(PO_{4})_{2}} = 385 đvC$
$n) PTK_{BaSO_{4}} = 233 đvC$
$m) PTK_{Na_{2}CO_{3}} = 106 đvC$
$o) PTK_{Al(OH)_{3}}= 78 đvC$
$p) PTK_{Zn(OH)_{2}} = 99 đvC$
$z) PTK_{Ba(NO_{3})_{2}} = 261 đvC$
$v) Câu h)$
$u) câu m)$
Mình có nhầm chỗ nào thì bảo nha:3
$a,$
$CTHH$ $:$ $Na_2 SO_4$
$PTK$ $:$ $23×2$ $+$ $32$ $+$ $16×4$ $=$ $142$
$b,$
$CTHH$ $:$ $MgSO_4$
$PTK$ $:$ $24$ $+$ $32$ $+$ $16×4$ $=$ $120$
$c,$
$CTHH$ $:$ $Cu(NO_3)_2$
$PTK$ $:$ $64$ $+$ $(14$ $+$ $16×3)×2$ $=$ $188$
$d,$
$CTHH$ $:$ $Ca(OH)_2$
$PTK$ $:$ $40$ $+$ $(1$ $+$ $16)×2$ $=$ $74$
$e,$
$CTHH$ $:$ $Fe(NO_3)_3$
$PTK$ $:$ $56$ $+$ $(14$ $+$ $16×3)×3$ $=$ $242$
$h,$
$CTHH$ $:$ $Zn_3 (PO_4)_2$
$PTK$ $:$ $65×3$ $+$ $(31$ $+$ $16×4)×2$ $=$ $385$
$k,$ không có chất này
$g,$
$CTHH$ $:$ $AlCl_3$
$PTK$ $:$ $27$ $+$ $35,5×3$ $=$ $133,5$
$n,$
$CTHH$ $:$ $BaSO_4$
$PTK$ $:$ $137$ $+$ $32$ $+$ $16×4$ $=$ $233$
$m,$
$CTHH$ $:$ $Na_2 CO_3$
$PTK$ $:$ $23×2$ $+$ $12$ $+$ $16×3$ $=$ $106$
$o,$
$CTHH$ $:$ $Al(OH)_3$
$PTK$ $:$ $27$ $+$ $(16$ $+$ $1)×3$ $=$ $78$
$p,$
$CTHH$ $:$ $Zn(OH)_2$
$PTK$ $:$ $65$ $+$ $(16$ $+$ $1)×2$ $=$ $99$
$Chúc$ $bn$ $hk$ $tốt$ $!!$ $:))))$
$Xin$ $ctlhn$ $ạ.$