Câu 1

 \(m_{HNO_3}=0,3.63=18,9\left(g\right)\)

\(m_{CuSO_4}=1,5.160=240\left(g\right)\)

\(m_{AlCl_3}=2.133,5=267\left(g\right)\)

Câu 2

a) \(V_{N_2}=3.22,4=67,2\left(l\right)\)

\(V_{H_2}=0,45.22,4=10,08\left(l\right)\)

\(V_{O_2}=0,55.22,4=12,32\left(l\right)\)

b) \(V_{hh}=\left(0,25+0,75\right).22,4=22,4\left(l\right)\)

\(a,m_{CO_2}=0,02.44=0,88(g)\\ V_{CO_2}=0,02.22,4=0,448(l)\\ \text{Số phân tử }CO_2:0,02.6.10^{23}=0,12.10^{23}\\ b,m_{H_2S}=0,75.34=25,5(g)\\ V_{H_2S}=0,75.22,4=16,8(l)\\ \text{Số phân tử }H_2S:0,75.6.10^{23}=4,5.10^{23}\)

\(a,\) Số nguyên tử O: \(0,2.6.10^{23}=1,2.10^{23}\)

\(b,\) Số phân tử Cl₂: \(0,5.6.10^{23}=3.10^{23}\)

\(c,\) Số nguyên tử S: \(1,25.6.10^{23}=7,5.10^{23}\)

\(d,\) Số phân tử SO₂: \(0,75.6.10^{23}=4,5.10^{23}\)

M H 2 O  =1.2 + 16 =18 g/mol

m H 2 O = n H 2 O . M H 2 O = 2,25.18 = 40,5(g)

M C O 2 = 12 + 16.2 =44g/mol

m C O 2 = n C O 2 . M C O 2  = 0,15.44 = 6,6(g)

a) \(m_{Na}=n.M=0,3.23=6,9\left(g\right)\)

 \(m_{O_2}=n_{O_2}.M_{O_2}=0,3.32=9,6\left(g\right)\)

b) \(m_{HNO_3}=n_{HNO_3}.M_{HNO_3}=1,2.63=75,6\left(g\right)\)

    \(m_{Cu}=n.M=0,5.64=32\left(g\right)\)

c) \(m_{KNO_3}=n.M=0,125=0,125.101=12,625\left(g\right)\)

    \(m_{KMnO_4}=n.M=0,125.158=19,75\left(g\right)\)

     \(m_{KClO_3}=n.M=0,125.122,5=15,3125\left(g\right)\)

m H 2 = n H 2 . M H 2  = 12.2 = 24(g)

→ V H 2 = n H 2  .22,4 = 12.22,4 = 268,8(l)

m C O 2 = n C O 2 . M C O 2 = 0,05.44 = 2,2(g)

→ V C O 2 = n C O 2  . 22,4= 0,05.22,4= 1,12(l)

m C O = n C O . M C O = 0,01.28 = 0,28(g)

→ V C O = n C O  .22,4 = 0,01.22,4 = 0,224(l)

Bài 3:

\(a,Số.nguyên.tử.H=0,1.6.10^{23}=6.10^{22}\) ( nguyên tử )

\(b,Số.phân.tử.H_2O=10.6.10^{23}=6.10^{24}\left(phân.tử\right)\)

\(c,Số.phân.tử.CH_4=0,25.6.10^{23}=1,5.10^{23}\left(phân.tử\right)\)

Bài 4:

a, \(M_{CuO}=64+16=80\left(\dfrac{g}{mol}\right)\)

\(b,M_{Fe_2\left(SO_4\right)_3}=56.2+32.3+16.12=400\left(\dfrac{g}{mol}\right)\)

\(c,M_{C_2H_2}=12.2+1.2=26\left(\dfrac{g}{mol}\right)\)

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Bài 5:

a, CTHH: CuSO₄

b, \(M_{CuSO_4}=64+32+16.4=160\left(\dfrac{g}{mol}\right)\)

c, \(n_{Cu}=\dfrac{64}{64}=1mol\\ n_O=\dfrac{16.4}{16}=4mol\)

m O = n O . M O  = 0,01.16= 0,16(g)

m O 2 = n O 2 . M O  = 0,01.32 = 0,32(g)

m C u = n C u . M C u  = 2.64 = 128(g)