\(a,n_{CuO}=\dfrac{59}{80}=0,7375\left(mol\right)\\ PTHH:2Cu\left(NO_3\right)_2\rightarrow^{t^o}2CuO+4NO_2\uparrow+O_2\uparrow\\ \Rightarrow\left\{{}\begin{matrix}n_{O_2}=\dfrac{1}{2}n_{CuO}=0,36875\left(mol\right)\\n_{NO_2}=2n_{CuO}=1,475\left(mol\right)\end{matrix}\right.\\ \Rightarrow\left\{{}\begin{matrix}V_{O_2}=0,36875\cdot22,4=8,26\left(l\right)\\V_{NO_2}=1,475\cdot22,4=33,04\left(l\right)\end{matrix}\right.\)

\(b,\text{Chất rắn thu đc là }CuO\text{ gồm có }Cu,O\\ \%_O=\dfrac{16}{80}\cdot100\%=20\%\\ \Rightarrow m_O=59\cdot20\%=11,8\left(g\right)\\ \Rightarrow m_{Cu}=59-11,8=47,2\left(g\right)\)

ủa anh minh lm r mà trong này nè

Tham khảo:

https://hoc24.vn/cau-hoi/nung-752-gam-cuno32-bi-phan-huy-theo-so-do-phan-ung-sau-cuno32-cuo-no2-o2-sau-mot-thoi-gian-thay-con-lai-59-gam-chat-ran-a-tinh-the-ti.3307073058847

\(n_{Cu\left(NO_3\right)_2}=\dfrac{75,2}{188}=0,4mol\)

Gọi \(n_{Cu\left(NO_3\right)_2pứ}=x\left(mol\right)\)

\(Cu\left(NO_3\right)_2\underrightarrow{t^o}CuO+2NO_2+O_2\)

\(m_{CuO}=80x\left(g\right)\)

\(m_{Cu\left(NO_3\right)_2pứ}=188\cdot\left(0,4-x\right)mol\)

\(\Rightarrow m_{CuO}+m_{Cu\left(NO_3\right)_2pứ}=59\)

\(\Rightarrow x=0,15mol\)

\(V_{NO_2}=2\cdot0,15\cdot22,4=6,72l\)

\(V_{O_2}=0,15\cdot22,4=3,36l\)

\(m_{CuO}=0,15\cdot80=12g\)

Đặt : 

\(n_{O_2}=a\left(mol\right)\)

\(2Cu\left(NO_3\right)_2\underrightarrow{^{^{t^0}}}2CuO+4NO_2+O_2\)

\(2a..............2a.......4a......a\)

\(BTKL:\)

\(m_{khí}=75.2-59=16.2\left(g\right)\)

\(\Rightarrow4a\cdot46+32a=16.2\)

\(\Rightarrow a=0.075\)

\(V_{NO_2}=0.075\cdot4\cdot22.4=6.72\left(l\right)\)

\(V_{O_2}=0.075\cdot22.4=1.68\left(l\right)\)

Chất rắn gồm : Cu(NO₃)₂ dư , CuO 

\(m_{CuO}=0.075\cdot2\cdot80=12\left(g\right)\)

\(m_{Cu\left(NO_3\right)_2\left(dư\right)}=75.2-0.075\cdot2\cdot188=47\left(g\right)\)

nCu(NO3)2=15.04188=0.08(mol)

- Gọi số mol Cu(NO3)2 đã phản ứng là x.

⇒⇒mCuO=80.x (g)

và mCu(NO3)2phản ứng =188.(0.08-x) (g)

- Theo bài ra, ta có:

mCuO+mCu(NO3)2=8.56(g)

⇒⇒80.x + 188.(0.08-x) = 8.56

⇒⇒108x = 6.48

⇒⇒x=0.06 (mol)

⇒mCu(NO3)2pư=0.06⋅188=11.28(g)

⇒%mCu(NO3)2pư=11.28\15.04⋅100%=75%

Ko cần nữa mik giải đc r

\(n_{Cu\left(NO_3\right)_2}=\dfrac{15,04}{188}=0,08\left(mol\right)\)

Gọi số mol Cu(NO₃)₂ pư là a

PTHH: 2Cu(NO₃)₂ --t^o--> 2CuO + 4NO₂ + O₂

                 a---------------->a------->2a

=> 188(0,08-a) + 80a = 8,56

=> a = 0,06

=> \(\left\{{}\begin{matrix}m_{Cu\left(NO_3\right)_2}=\left(0,08-0,06\right).188=3,76\left(g\right)\\m_{CuO}=0,06.80=4,8\left(g\right)\end{matrix}\right.\)

=> m_{Cu(NO3)2 bị phân hủy} = 0,06.188 = 11,28(g)

Có lẽ bài này nhường chỗ cho idol của mình là Quang Nhân :))

\(2Cu\left(NO_3\right)_2\underrightarrow{^{^{t^0}}}2CuO+4NO_2+O_2\)

\(0.405..............0.405.....0.81....0.2025\)

Bảo toàn khối lượng : 

\(m_{O_2}=15.04-8.56=6.48\left(g\right)\)

\(n_{O_2}=\dfrac{6.48}{32}=0.2025\left(mol\right)\)

\(m_{Cu\left(NO_3\right)_2\left(pư\right)}=0.405\cdot188=76.14\left(g\right)\)

Thành phần chất rắn còn lại gồm : Cu(NO₃)₂ dư và CuO 

\(n_{Cu\left(NO_3\right)_2}=\dfrac{15.04}{188}=0.08\left(mol\right)\)

\(n_{O_2}=x\left(mol\right)\)

\(2Cu\left(NO_3\right)_2\underrightarrow{t^0}2CuO+4NO_2+O_2\)

\(2x......................4x......x\)

\(BTKL:\)

\(m_{NO_2}+m_{O_2}=15.04-8.56=6.48\left(g\right)\)

\(\Rightarrow4x\cdot46+32x=6.48\)

\(\Rightarrow x=0.03\)

\(\%Cu\left(NO_3\right)_{2\left(ph\right)}=\dfrac{0.03}{0.08}\cdot100\%=37.5\%\)

\(b.\)

\(\overline{M}=\dfrac{6.48}{0.12+0.03}=43.2\left(\dfrac{g}{mol}\right)\)

\(d_{\dfrac{hh}{H_2}}=\dfrac{43.2}{2}=21.6\)

\(c.\)

\(H\%=\dfrac{0.03}{0.08}\cdot100\%=37.5\%\)

\(\)

a) PTHH: \(2Cu\left(NO_3\right)_2\xrightarrow[]{t^o}2CuO+4NO_2+O_2\)

Gọi \(n_{O_2}=a\left(mol\right)\Rightarrow n_{NO_2}=4a\left(mol\right)\)

Bảo toàn khối lượng: \(m_{Cu\left(NO_3\right)_2}=m_{rắn}+m_{khí}\)

\(\Rightarrow m_{khí}=m_{Cu\left(NO_3\right)_2}-m_{rắn}=6,48\left(g\right)=32a+46\cdot4a\) \(\Rightarrow a=0,03\left(mol\right)\)

\(\Rightarrow n_{Cu\left(NO_3\right)_{21}\left(p.ứ\right)}=0,06\left(mol\right)\) \(\Rightarrow m_{Cu\left(NO_3\right)_2\left(p.ứ\right)}=0,06\cdot188=11,28\left(g\right)\)

b) Ta có: \(\overline{M}_{khí}=\dfrac{0,03\cdot32+0,03\cdot4\cdot46}{0,03+0,03\cdot4}=43,2\) \(\Rightarrow d_{khí/H_2}=\dfrac{43,2}{2}=21,6\)

c) Ta có: \(H\%=\dfrac{m_{Cu\left(NO_3\right)_2\left(p.ứ\right)}}{m_{Cu\left(NO_3\right)_2\left(bđ\right)}}=\dfrac{11,28}{15,04}=75\%\)

Đề không cho bất kì khối lượng hay con số nào sao em?

Gọi \(n_{Cu\left(NO3\right)2\left(pư\right)}:a\left(mol\right)\)

\(n_{Cu\left(NO3\right)2\left(bđ\right)}=0,08\left(mol\right)\)

\(PTHH:2Cu\left(NO_3\right)_2\rightarrow2CuO+O_2+4NO_2\)

_____________a_______a__________0,5a____2a

\(n_{Cu\left(NO3\right)2\left(dư\right)}=0,08-a\left(mol\right)\)

\(n_{CuO}=a\left(mol\right)\Rightarrow\left(0,08-a\right).188+80a=8,56\)

\(\Leftrightarrow a=0,06\left(mol\right)\)

\(\Rightarrow H=\frac{0,06}{0,08}.100\%=75\%\)

\(\left\{{}\begin{matrix}n_{NO2}=0,06.2=0,12\left(mol\right)\\n_{O2}=0,5a=0,03\left(mol\right)\end{matrix}\right.\)

\(M_{khi}=43,2\left(\frac{g}{mol}\right)\Rightarrow d_{M_{khi}/H2}=\frac{43,2}{2}=21,6\)

Gọi \(n_{Pb(NO_3)_2\ pư} = a(mol)\)

2Pb(NO₃)₂   \(\xrightarrow{t^o}\)   2PbO  +   4NO₂   +   O₂

a............................................2a............0,5a.............(mol)

Ta có : 

\(m_{NO_2} + m_{O_2} = 66,2-55,4\\ \Rightarrow 2a.46 + 32.0,5a= 10,8\\ \Rightarrow a = 0,1\)

Vậy hiệu suất phản ứng: 

\(H = \dfrac{0,1.331}{66,2}.100\% = 50\%\)