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

a lấy 4,2.1023/6.1023
 

Câu 1:

\(m_{H_2S}=0,75.34=25,5(g)\\ m_{CaSO_4}=0,025.136=3,4(g)\\ m_{Fe_2O_3}=0,05.160=8(g)\)

Câu 2:

\(V_{N_2}=2,5.22,4=56(l)\\ V_{H_2}=0,03.22,4=0,672(l)\\ V_{O_2}=0,45.22,4=10,08(l)\\ V_{hh}=22,4.(0,2+0,25)=22,4.0,45=10,08(l)\)

giúp mình với ạ 

a) nCO2=[(9.10²³)/(6.10²³)]=1,5(mol)

=> mCO2=1,5.44=66(g)

V(CO2,đktc)=1,5.22,4=33,6(l)

b) nH2=4/2=2(mol)

N(H2)=2.6.10²³=12.10²³(phân tử)

V(H2,đktc)=2.22,4=44,8(l)

c) N(CO2)=0,5.6.10²³=3.10²³(phân tử)

V(CO2,đktc)=0,5.22,4=11,2(l)

mCO2=0,5.44=22(g)

d) nN2=2,24/22,4=0,1(mol)

mN2=0,1.28=2,8(g)

N(N2)=0,1.10²³.6=6.10²² (phân tử)

e) nCu=[(3,01.10²³)/(6,02.10²³)]=0,5(mol)

mCu=0,5.64=32(g)

Mà sao tính thể tích ta :3

a) \(m_{H_2SO_4}=0,35.98=34,3\left(g\right)\)

b) \(m_{Na_2CO_3}=\dfrac{5,4.10^{23}}{6.10^{23}}.106=95,4\left(g\right)\)

c) \(m_{Ca\left(NO_3\right)_2}=\dfrac{2,4.10^{23}}{6.10^{23}}.164=65,6\left(g\right)\)

a) \(m_{H_2SO_4}=98.0,35=34,3\left(g\right)\)

b) \(n_{Na_2CO_3}=\dfrac{5,4.10^{23}}{6.10^{23}}=0,9\left(mol\right)\)

=> \(m_{Na_2CO_3}=106.0,9=95,4\left(g\right)\)

c) \(n_{Ca\left(NO_3\right)_2}=\dfrac{2,4.10^{23}}{6.10^{23}}=0,4\left(mol\right)\\ m_{Ca\left(NO_3\right)_2}=0,4.164=65,6\left(g\right)\)

Câu 9. Tính khối lượng của những lượng chất sau:
a) 0,3 mol nguyên tử Na;=>m Na=0,3.23=6,9g

0,3 mol phân tử O2=>m O2=0,3.32=9,6g

b) 1,2 mol phân tử HNO3; =>n HNO3=1,2.63=75,6g

0,5 mol phân tử Cu=>m Cu=0,5.64=32g

c) 0,125 mol của mỗi chất sau:

KNO₃, KMnO₄, KClO₃ 

m KNO3=0,125.101=12,625g

m KMnO4==0,125.158=19,75g

m KClO3=0,125.122,5=15,3125g

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

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

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

< Bài này bạn xem lại đề giúp mình nhé! Thấy nó cho ko hợp lí == >

Bài 5:

a, CTHH: CuSO₄

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

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

\(a.\)

\(n_{O_2}=\dfrac{0.15\cdot N}{N}=0.15\left(mol\right)\)

\(m_{O_2}=0.15\cdot32=48\left(g\right)\)

\(V_{O_2}=0.15\cdot22.4=3.36\left(l\right)\)

\(b.\)

\(n_{CO_2}=\dfrac{1.44\cdot10^{23}}{6\cdot10^{23}}=0.24\left(mol\right)\)

\(m_{CO_2}=0.24\cdot44=10.56\left(g\right)\)

\(V_{CO_2}=0.24\cdot22.4=5.376\left(l\right)\)

\(c.\)

\(m_{H_2}=0.25\cdot2=0.5\left(g\right)\)

\(V_{H_2}=0.25\cdot22.4=5.6\left(l\right)\)

\(d.\)

\(m_{CH_4}=1.5\cdot16=24\left(g\right)\)

\(V_{CH_4}=1.5\cdot22.4=33.6\left(l\right)\)

\(e.\)

\(n_{CO_2}=\dfrac{8.8}{44}=0.2\left(mol\right)\)

\(V_{CO_2}=0.2\cdot22.4=4.48\left(l\right)\)

a. Ta có: \(n_{NaCl}=3N_{NaCl}=3\left(mol\right)\)

\(\Rightarrow m_{NaCl}=3.58,5=175,5\left(g\right)\)

b. \(m_{C_6H_{12}O_6}=0,05.180=9\left(g\right)\)