Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(CH_4+2O_2\rightarrow\left(t^o\right)CO_2+2H_2O\\ n_{CH_4}=\dfrac{14,874}{22,79}=0,6\left(mol\right)\\ \Rightarrow n_{CO_2}=n_{CH_4}=0,6\left(mol\right)\\ n_{O_2}=n_{H_2O}=2.0,6=1,2\left(mol\right)\\ V_{O_2\left(đkc\right)}=1,2.24,79=29,748\left(l\right)\\ V_{kk\left(đkc\right)}=29,748.5=148,74\left(l\right)\\ V_{CO_2\left(đkc\right)}=0,6.24,79=14,874\left(l\right)\\ m_{CO_2}=44.0,6=26,4\left(g\right)\\ m_{H_2O}=1,2.18=21,6\left(g\right)\\ V_{H_2O}=\dfrac{21,6}{1}=21,6\left(ml\right)\)
Đề cho đkc nên anh tính theo đkc nhé!
\(pthh:CH_4+2O_2\overset{t^o}{--->}CO_2\uparrow+2H_2O\)
Ta có: \(n_{CH_4}=\dfrac{14,874}{22,4}=\dfrac{7437}{11200}\left(mol\right)\)
Theo pt: \(n_{O_2}=n_{H_2O}=2.n_{CH_4}=2.\dfrac{7437}{11200}\approx1,328\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}V_{O_2}=1,328.22,4=29,7472\left(lít\right)\\m_{H_2O}=1,328.18=23,904\left(g\right)\end{matrix}\right.\)
Theo pt: \(n_{CO_2}=n_{CH_4}=\dfrac{7437}{11200}\left(mol\right)\)
\(\Rightarrow\left\{{}\begin{matrix}V_{CO_2}=\dfrac{7437}{11200}.22,4=14,874\left(lít\right)\\m_{CO_2}=\dfrac{7437}{11200}.44\approx29,22\left(g\right)\end{matrix}\right.\)
\(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ 0,2........0,3...........0,1...........0,3\left(mol\right)\\ a.C_{MddH_2SO_4}=\dfrac{0,3}{0,3}=1\left(M\right)\\ b.m_{Al_2\left(SO_4\right)_3}=342.0,1=34,2\left(g\right)\\ c.V_{H_2\left(đktc\right)}=0,3.22,4=6,72\left(l\right)\)
PTHH: \(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)
a) \(n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\)
\(n_{H_2SO_4}=\dfrac{3}{2}n_{Al}=0,3\left(mol\right)\)
\(\Rightarrow C_{M_{H_2SO_4}}=\dfrac{0,3}{0,3}=1M\)
b) \(n_{Al_2\left(SO_4\right)_3}=\dfrac{1}{2}n_{Al}=0,1\left(mol\right)\)
\(\Rightarrow m_{Al_2\left(SO_4\right)_3}=n.M=0,1.342=34,2\left(g\right)\)
c) \(n_{H_2}=n_{H_2SO_4}=0,3\left(mol\right)\)
\(\Rightarrow V_{H_2}=n.22,4=0,3.22,4=6,72\left(l\right)\)
Ta có: \(n_{CaCO_3}=\dfrac{50}{100}=0,5\left(mol\right)\)
PT: \(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)
a, \(n_{CO_2}=n_{CaCO_3}=0,5\left(mol\right)\Rightarrow V_{CO_2}=0,5.24,79=12,395\left(l\right)\)
b, \(n_{HCl}=2n_{CaCO_3}=1\left(mol\right)\)
\(\Rightarrow C_{M_{HCl}}=\dfrac{1}{0,5}=2\left(M\right)\)
\(MnO_2+4HCl_đ-^{t^o}\rightarrow MnCl_2+Cl_2+2H_2O\\ n_{HCl}=\dfrac{7,3}{36,5}=0,2\left(mol\right)\\TheoPT: n_{Cl_2}=\dfrac{1}{4}n_{HCl}=0,05\left(mol\right)\\ \Rightarrow V_{Cl_2}=0,05.22,4=1,12\left(l\right)\)
\(n_{HCl}=\dfrac{7,3}{36,5}=0,2(mol)\\ PTHH:MnO_2+4HCl\to MnCl_2+Cl_2+2H_2O\\ \Rightarrow n_{Cl_2}=\dfrac{1}{4}n_{HCl}=0,05(mol)\\ \Rightarrow V_{Cl_2(đkc)}=0,05.24,79=1,2395(l)\)
\(n_{HCl}=6\cdot0,05=0,3\left(mol\right)\\ a,PTHH:2Al+6HCl\rightarrow2AlCl_3+3H_2\)
Hiện tượng: Al tan dần, có bọt khí không màu xuất hiện
\(b,\left\{{}\begin{matrix}n_{Al}=\dfrac{1}{3}n_{HCl}=0,1\left(mol\right)\\n_{H_2}=\dfrac{1}{2}n_{HCl}=0,15\left(mol\right)\end{matrix}\right.\Rightarrow\left\{{}\begin{matrix}m_{Al}=0,1\cdot27=2,7\left(g\right)\\V_{H_2\left(đkc\right)}=0,15\cdot24,79=3,7185\left(l\right)\end{matrix}\right.\)
thầy mik cho thiếu, mik vừa sửa lại nếu b lm đc mong b giúp mik ;.;
V = 24,79.n