Thay va cac ban co the giai giup em

P

phuongdung282

[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
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Câu 1: [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Kh[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ử [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]hoàn toàn m gam oxit MxOy c[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ầ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]n v[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ừ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]a [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đủ [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]17,92 lít khí CO ([/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ktc), thu [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đượ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]c a gam kim lo[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ạ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]i M. Hoà tan h[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ế[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]t a gam M b[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ằ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ng dung d[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ị[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ch H2SO4 [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đặ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]c nóng (d[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ư[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]), thu [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đượ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]c 20,16 lít khí SO2 (s[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ả[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]n ph[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ẩ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]m kh[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ử [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]duy nh[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ấ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]t, [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ở đ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ktc). Oxit MxOy là [/FONT]
[/FONT]A. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Cr2O3. [/FONT][/FONT]B. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]FeO. [/FONT][/FONT]C. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Fe3O4. [/FONT][/FONT]D. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]CrO [/FONT][/FONT]
[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Câu 2: [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]Cho 13,74 gam 2,4,6-trinitrophenol vào bình kín r[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ồ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]i nung nóng [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ở [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]nhi[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ệ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]t [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]độ [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]cao. Sau khi ph[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ả[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]n [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ứ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ng x[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ả[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]y ra hoàn toàn, thu [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]đượ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]c x mol h[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ỗ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]n h[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ợ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]p khí g[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ồ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]m: CO2, CO, N2 và H2. Giá tr[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ị [/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]c[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]ủ[/FONT][/FONT][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]a x là [/FONT]
[/FONT]A. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]0,60. [/FONT][/FONT]B. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]0,36. [/FONT][/FONT]C. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]0,54. [/FONT][/FONT]D. [FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman]0,45. [/FONT][/FONT]
[FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman][FONT=Times New Roman,Times New Roman][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT]
 
H

hocmai.hoahoc

Thầy hướng dẫn em như sau:
Câu 1: Ta coi hỗn gồm M và O
Như thế áp dụng định luật bảo toàn electron => ne = 2nO = 2nCO => nO = 0,8 mol
Quan sát đáp án ta thấy kim loại là Cr và Fe đều hóa trị 3 nên trong phản ứng với H2SO4 ta có
ne = 3nM = 2nSO2 => nM = 0,6
=> x: y = 0,6/0,8 => Fe3O4
Câu 2: Áp dụng định luật bảo toàn nguyên tố
Bảo toàn N => N2
Bảo toàn C=> Tổng số mol CO và CO2
Bảo toàn H => H2
Từ đó em tính được kết quả
 
T

truonga3vodoidz

giai nhu vay goi la suy luan ha?thay.chang may day la 1 baj tu luan thj sao?chang le laj paj chja truong hop ra de xet ak?
 
M

mayeurap11

ko phai dau minh hieu the nay bai 1 minh co the xet tung truong hop :
Th 1 : M hoa tri 1 : roi tinh lap ti le nM:nO=> he so
TH2 : M hoa tri 2 : lam tuong tu => he so
TH3 : M hoa tri 3 : roi ra ket qua
doi voi bai nay thi chi co cai nay vi ko cho hoa tri may chu ko co cai j de biet M hoa tri may dau minh nghi la the ko biet cac ban nghi sao
 
D

dinhkhanhtrung

mayeurap11 said:
ko phai dau minh hieu the nay bai 1 minh co the xet tung truong hop :
Th 1 : M hoa tri 1 : roi tinh lap ti le nM:nO=> he so
TH2 : M hoa tri 2 : lam tuong tu => he so
TH3 : M hoa tri 3 : roi ra ket qua
doi voi bai nay thi chi co cai nay vi ko cho hoa tri may chu ko co cai j de biet M hoa tri may dau minh nghi la the ko biet cac ban nghi sao
Bấm để xem đầy đủ nội dung ...
Mình cũng nghĩ như mayeurap11 ! :)
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