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\(c.\overline{M_X}=\dfrac{m_{O_2}+m_{H_2}+m_{CO_2}+m_{CH_4}}{n_{O_2}+n_{H_2}+n_{CO_2}+n_{CH_4}}\\ =\dfrac{0,8.32+1.2+0,2.44+2.16}{0,8+1+0,2+2}\\ =17,1\left(\dfrac{g}{mol}\right)\)
\(d)\)dX/H2 = \(\dfrac{M_X}{2}=\dfrac{17,1}{2}=8,55\)
a, \(V_{hh}=\left(0,5+1,5+1+2\right).22,4=112\left(l\right)\)
b,\(m_{hh}=m_{H2}+m_{O2}+m_{CO2}+m_{N2}\)
\(=0,5.21,5.32+1.44+2.28=149\left(g\right)\)
c,Tổng số phân tử
\(=\left(0,5+1,5+1+1\right).6.10^{23}=30.10^{23}\)
a) mFeSO4= 0,25.152=38(g)
b) mFeSO4= \(\dfrac{13,2.10^{23}}{6.10^{23}}.152=334,4\left(g\right)\)
c) mNO2= \(\dfrac{8,96}{22,4}.46=18,4\left(g\right)\)
d) mA= 27.0,22+64.0,25=21,94(g)
e) mB= \(\dfrac{11,2}{22,4}.32+\dfrac{13,44}{22,4}.28=32,8\left(g\right)\)
g) mC= \(64.0,25+\dfrac{15.10^{23}}{6.10^{23}}.56=156\left(g\right)\)
h) mD= \(0,25.32+\dfrac{11,2}{22,4}.44+\dfrac{2,7.10^{23}}{6.10^{23}}.28=42,6\left(g\right)\)
hơi muộn nha<3
Bài 1
MXH3=0,5.0,5.34=17
-->X+3=17
--->X=14(N)
Vậy X là Nito
Bài 2
a) Ta có
V O2=0,8.22,4=17,92(l)
VH2=1.22,4=22,4(l)
V CO2=0,2.22,4=4,48(l)
V CH4=2.22,4=44,8(l)
\(\sum V_{hh}=\)17,92+22,4+4,48+44,8=89,6(l)
%V O2=17,92/89,6.100%=20%
%V H2=22,4/89,6.100%=25%
%V CO2=4,48/89,6.100%=5%
%VCH4=100-20-25-5=50%
b)
m O2=0,8.32=25,6(g)
mH2=1.2=2(g)
m CO2=0,2.44=8,8(g)
mCH4=2.16=32(g)
\(\sum m_{hh}=^{ }\)25,6+2+8,8+32=68,4(g)
%m O2=25,6/68,4.100%=37%
%m H2=2/68,4 .100%=3%
%m CO2=8,8./68,4.100%=13%
%m CH4=100-37-3-13=47%
c) Phân tử khối trung bình=\(\frac{68,4}{0,8+1+0,2+2}=17,1\)
d)\(d_{\frac{X}{H2_{ }}_{ }}=\frac{17,1}{2}=8,55\)
M tb của X=\(\frac{46\cdot0,02+28\cdot0,01}{0,02+0,01}\)=40g
dX/O2=40/32=1,25 lần
\(m_X\)=46.0,02+28.0,01= 1,2(g)
\(n_X\)= 0,02+0,01= 0,03 (mol)
=>\(M_X\)= \(\frac{1,2}{0,03}\)= 40 (g)
=> d\(\frac{M_X}{M_{O_2}}\)= \(\frac{40}{32}\)= 1,25