1.

\(a,n_{Al}=\dfrac{5,4}{27}=0,2(mol)\\ n_{CuO}=\dfrac{8}{80}=0,1(mol)\\ n_{Fe_2O_3}=\dfrac{16}{160}=0,1(mol)\\ b,V_{CO_2}=0,25.22,4=5,6(l)\\ V_{H_2}=0,175.22,4=3,92(l)\\ V_{N_2}=1,5.22,4=33,6(l)\)

2.

\(a,n_{Al}=0,5.2=1(mol);n_{O}=0,5.3=1,5(mol)\\ \Rightarrow m_{Al}=1.27=27(g);m_{O}=1,5.16=24(g)\\ b,n_{CO_2}=\dfrac{2,2}{44}=0,05(mol)\\ \Rightarrow m_C=0,05.12=0,6(g);m_O=0,05.2.16=1,6(g)\)

a, m_CaO = 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) 

\(n_{SO_2}=\dfrac{m}{M}=\dfrac{3,2}{64}=0,05\left(mol\right)\\ n_{CO_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

b) 

\(n_{Cl_2}=\dfrac{V_{\left(\text{đ}ktc\right)}}{22,4}=\dfrac{1,344}{22,4}=0,06\left(mol\right)\Rightarrow m_{Cl_2}=n.M=0,06.71=4,26\left(mol\right)\\ n_{Na_2CO_3}=n.M=0,5.106=53\left(g\right)\)

c) 

\(V_{N_2\left(\text{đ}ktc\right)}=n.22,4=0,25.22,4=5,6\left(l\right)\\ n_{O_2}=\dfrac{m}{M}=\dfrac{4,8}{32}=0,15\left(mol\right)\Rightarrow V_{O_2\left(\text{đ}ktc\right)}=n.22,4=0,15.22,4=3,36\left(l\right)\)

1)

Số nguyên tử Al là 1,5.6.10²³ = 9.10²³ nguyên tử

Số phân tử H₂ là 0,5.6.10²³ = 3.10²³ phân tử

Số phân tử NaCl là 0,25.6.10²³ = 1,5.10²³ phân tử

Số phân tử H₂O là 0,05.6.10²³ = 0,3.10²³ phân tử

2)

$V_{CO_2} = 1.22,4 = 22,4(lít)$
$V_{H_2} = 2.22,4 = 44,8(lít)$
$V_{O_2} = 1,5.22,4 = 33,6(lít)$

$V_{hh} = (0,25 + 1,25).22,4 = 33,6(lít)$

1. Tính số nguyên tử hoặc phân tử trong mỗi lượng chất sau: 1,5 mol Al; 0,5 mol H2; 0,25 mol NaCl; 0,05 mol H2O.

1,5 mol Al có : \(1,5.6.10^{23}=9.10^{23}\) nguyên tử

0,5 mol H2 có : \(0,5.6.10^{23}=3.10^{23}\)phân tử

0,25 mol NaCl: \(0,25.6.10^{23}=1,5.10^{23}\) phân tử

0,05 mol H2O có : \(0,05.6.10^{23}=0,3.10^{23}\) phân tử

3)

$m_{Fe} = 0,1.56 = 5,6(gam)$
$m_{Cu} = 2,15.64 = 137,6(gam)$
$m_{H_2SO_4} = 0,8.98  = 79,4(gam)$
$m_{CuSO_4} = 0,5.160 = 80(gam)$

4)

$n_{CO_2} = \dfrac{0,44}{44} = 0,01(mol) \Rightarrow V_{CO_2} = 0,01.22,4 = 0,224(lít)$
$n_{H_2} = \dfrac{0,04}{2} = 0,02(mol) \Rightarrow V_{H_2} = 0,02.22,4 = 0,448(lít)$
$n_{N_2} = \dfrac{2,8}{28} = 0,1(mol) \Rightarrow V_{N_2} = 0,1.22,4 = 2,24(lít)$
$n_{SO_2} = \dfrac{3,2}{64} = 0,05(mol) \Rightarrow V_{SO_2} = 0,05.22,4 = 1,12(lít)$
$n_{CO_2} = 0,05 ; n_{N_2} = 0,05 \Rightarrow V_{hh} = (0,05 + 0,05).22,4 = 2,24(lít)$

\(a.V_{CO_2\left(dktc\right)}=0,25.22,4=5,6\left(l\right)\)

\(b.m_{Al_2O_3}=0,5.160=80\left(g\right)\)

a)

b) VCO2 = 22,4 .0,175 = 3,92l.

VH2 = 22,4 .1,25 = 28l.

VN2 = 22,4.3 = 67,2l.

c) Số mol của hỗn hợp khí bằng tổng số mol của từng khí.

nhh = nCO2 + nH2 + nN2 = 0,01 + 0,02 + 0,02 = 0,05 mol

Vhh khí = (0,01 + 0,02 + 0,02) . 22,4 = 1,12l.

\(a.\)

\(m_{CuO}=2\cdot40=80\left(g\right)\)

\(b.\)

\(n_{CO_2}=\dfrac{8.96}{22,4}=0.4\left(mol\right)\)

\(c.\)

\(n_{CH_4}=\dfrac{1.2\cdot10^{23}}{6\cdot10^{23}}=0.2\left(mol\right)\)

\(V_{CH_4}=0.2\cdot22.4=4.48\left(l\right)\)

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) 

\(m_{FeCl_3}=0,025\cdot162,5=4,0625\left(g\right)\)

\(m_{H_2O}=0,5\cdot18=9\left(g\right)\)

\(m_{Cu\left(NO_3\right)_2}=0,35\cdot188=65,8\left(g\right)\)

b) 

\(V_{H_2}=0,3\cdot22,4=6,72\left(l\right)\)

\(n_{SO_2}=\dfrac{16}{64}=0,25\left(mol\right)\) \(\Rightarrow V_{SO_2}=0,25\cdot22,4=5,6\left(l\right)\)

\(n_{CO_2}=\dfrac{26,4}{44}=0,6\left(mol\right)\) \(\Rightarrow V_{CO_2}=0,6\cdot22,4=13,44\left(l\right)\)

a) m_{CuO = 0,25 x 80 = 20 (g)}

a)mCuO=0.25*(64+16)=20(g)

b)\(n_{MgCl_2}=\dfrac{19}{95}=0.2\left(mol\right)\)

Số phân từ MgCl₂ có trong 19g là 
0.2*6*10²³=1,2.10²³

c)
\(V_{hh}=\left(0.2+0.3+\dfrac{6.4}{32}\right).22,4=\left(0.5+0.2\right)=0.7\cdot22,4=15,68\left(l\right)\)