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a.
\(m_{Al}=0.5\cdot27=13.5\left(g\right)\)
\(m_{CO_2}=\dfrac{6.72}{22.4}\cdot44=13.2\left(g\right)\)
\(m_{N_2}=\dfrac{5.6}{22.4}\cdot28=7\left(g\right)\)
\(m_{CaCO_3}=0.25\cdot100=25\left(g\right)\)
b.
\(m_{hh}=\dfrac{3.36}{22.4}\cdot2+\dfrac{5.6}{22.4}\cdot28+0.2\cdot44=16.1\left(g\right)\)
N phân tử = 1 mol phân tử
\(\Rightarrow n_{O2}=1mol;n_{N_2}=2mol;n_{CO_2}=1,5mol\)
\(\Rightarrow m_{hh}=1.32+2.28+1,5.44=154g\)
b. \(m_{hh}=0,1.56+0,2.64+0,3.65+0,25.27=44,65g\)
c. \(n_{O_2}=\dfrac{2,24}{22,4}=0,1mol\)
\(n_{H_2}=\dfrac{1,12}{22,4}=0,05mol\)
\(n_{HCl}=\dfrac{6,72}{22,4}=0,3mol\)
\(n_{CO_2}=\dfrac{0,56}{22,4}=0,025mol\)
\(\Rightarrow m_{hh}=0,1.32+0,05.2+0,3.36,5+0,025.44=15,35g\)
a, mCaO = 0,5.56 = 28 (g)
b, \(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
c, \(n_{H_2SO_4}=\dfrac{24,5}{98}=0,25\left(mol\right)\)
d, \(V_{hhk}=0,2.22,4+0,3.22,4=11,2\left(l\right)\)
e, \(\%m_{Cu}=\dfrac{64}{64+32+16.4}.100\%=40\%\)
Bạn tham khảo nhé!
a) mCaO=nCaO.M(CaO)=0,5.56=28(g)
b) nCO2=V(CO2,dktc)=6,72/22.4=0,3(mol)
c) nH2SO4=mH2SO4/M(H2SO4)=24,5/98=0,25(mol)
d) V(hh H2,NH3)=(0,3+0,2).22,4=11,2(l)
e) %mCu/CuSO4=(64/160).100=40%
Chúc em học tốt!
\(a,m_{CaSO_4}=136.0,25=34\left(g\right)\\ b,n_{Cu_2O}=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\\ m_{Cu_2O}=0,5.144=72\left(g\right)\\ c,n_{NH_3}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\\ m_{NH_3}=17.0,3=5,1\left(g\right)\\ d,m_{C_4H_{10}}=0,17.58=9,86\left(g\right)\\ e,n_{Cu\left(OH\right)_2}=\dfrac{4,5.10^{25}}{6.10^{23}}=75\left(mol\right)\\ m_{Cu\left(OH\right)_2}=98.75=7350\left(g\right)\\ g,m_{MgO}=0,48.40=19,2\left(g\right)\\ h,n_{CO_2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\\ m_{CO_2}=44.0,15=6,6\left(g\right)\\ i,m_{Al\left(OH\right)_3}=78.0,25=19,5\left(g\right)\\\)
Các câu còn lại em làm tương tự nha!
a) \(n_{Al}=\dfrac{12,15}{27}=0,45\left(mol\right)\)
\(n_{O_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
PTHH: 4Al + 3O2 --to--> 2Al2O3
Xét tỉ lệ: \(\dfrac{0,45}{4}>\dfrac{0,3}{3}\)=> Al dư, O2 hết
PTHH: 4Al + 3O2 --to--> 2Al2O3
0,4<--0,3-------->0,2
=> \(m_{Al\left(dư\right)}=\left(0,45-0,4\right).27=1,35\left(g\right)\)
b) \(m_{Al_2O_3}=0,2.102=20,4\left(g\right)\)
4.
a) \(V_{SO_2}=0.5\cdot22.4=11.2\left(l\right)\)
b) \(V_{CH_4}=\dfrac{3.2}{16}\cdot22.4=4.48\left(l\right)\)
c) \(V_{N_2}=\dfrac{0.9\cdot10^{23}}{6\cdot10^{23}}\cdot22.4=3.36\left(l\right)\)
5.
a) \(m_{Al}=0.1\cdot27=2.7\left(g\right)\)
b) \(m_{Cu\left(NO_3\right)_2}=0.3\cdot188=56.4\left(g\right)\)
c) \(m_{Na_2CO_3}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}\cdot106=21.2\left(g\right)\)
d) \(m_{CO_2}=\dfrac{8.96}{22.4}\cdot44=17.6\left(g\right)\)
e) \(m_K=0.5\cdot2\cdot39=39\left(g\right)\\ m_C=0.5\cdot12=6\left(g\right)\\ m_O=0.5\cdot3\cdot16=24\left(g\right)\)
\(a,m_{Al\left(NO_3\right)_3}=1,5\cdot213=319,5\left(g\right)\\ b,n_{C_3H_8}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\\ \Rightarrow m_{C_3H_8}=0,3\cdot44=13,2\left(g\right)\)