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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
a) \(m_S=n_S.M_S=0,5.32=16\left(g\right)\)
b) \(m_{N_2}=n_{N_2}.M_{N_2}=1,5.28=42\left(g\right)\)
c) \(m_{Al_2O_3}=n_{Al_2O_3}.M_{Al_2O_3}=0,25.102=25,5\left(g\right)\)
d) \(n_H=\dfrac{3.10^{23}}{6.10^{23}}=0,5\left(mol\right)\\ \Rightarrow m_H=n_H.M_H=0,5.1=0,5\left(g\right)\)
e) \(n_{O_2}=\dfrac{V_{O_2\left(đktc\right)}}{22,4}=\dfrac{33,6}{22,4}=1,5\left(mol\right)\\ \Rightarrow m_{O_2}=n_{O_2}.M_{O_2}=1,5.32=48\left(g\right)\)
f) \(n_{SO_3}=\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\\ \Rightarrow m_{SO_3}=n_{SO_3}.M_{SO_3}=1,5.80=120\left(g\right)\)
nSO2 = 20,26 / 22,4 = 0,9 (mol)
nCO = \(\frac{7,2.10^{23}}{6.10^{23}}=1,2\left(mol\right)\)
=> Khối lượng hỗn hợp là:
mhỗn hợp = 5,6 + 0,9 x 64 + 1,2 x 28 + 0,5 x 32 = 112,8 (gam)
n của h2=1.2.1023:6.1023=0.2 mol
nSo2=6,4:64=0.1 mol
a,Vhh=[1,5+2,5+0.2+0,1] .22,4=96,32l
mhh=(1,5.32)+(2,5.28)+(0,2.2)+6,4=124,8g
nSO2 = 6,4 / 64 = 0,1 mol
nH2 = \(\frac{1,2\times10^{23}}{6\times10^{23}}=0,2\left(mol\right)\)
a/ Vhỗn hợp khí(đktc) = ( 0,1 + 0,2 + 1,5 + 2,5 ) x 22,4 = 96,32 lít
b/ mO2 = 1,5 x 32 = 48 gam
nN2 = 2,5 x 28 = 70 gam
nH2 = 0,2 x 2 = 0,4 gam
=> mhỗn hợp khí = 48 + 70 + 0,4 + 6,4 = 124,8 gam
Bài 1:
nCuSO4 = \(\frac{16}{160}=0,1\) mol
nCuSO4 . 5H2O = \(\frac{50}{250}= 0,2\) mol
nHCl = \(\frac{8,96}{22,4}= 0,4\) mol
Bài 2:
nKOH = \(\frac{6,022.10^{23}}{6.10^{23}}=1\) mol
mhh = mNaOH + mKOH = (0,25 . 40) + (1.56) = 66 (g)
Bài 3:
- nSO2 = \(\frac{12,8}{22,4}=0,57\) mol
- Gọi x,y lần lượt là số mol của CO, CO2
Ta có: x = \(\frac{1}{2}y = 0,5y\)
Ta có hệ pt: \(\left\{\begin{matrix} 28x + 44y = 20 & & \\ x = 0,5y & & \end{matrix}\right.\)
\(\Leftrightarrow \left\{\begin{matrix} x = 0,1725 & & \\ y = 0,345 & & \end{matrix}\right.\)
Vhh = VCO + VCO2 = (0,1725 . 22,4) + (0,345 . 22,4) = 11,592 (lít)
a) Ta có: \(n_{CO_2}=\frac{m_{CO_2}}{M_{CO_2}}=\frac{11}{44}=0,25\left(mol\right)\)
\(V_{CO_2}=n_{CO_2}.22,4=0,25.22,4=5,6\left(l\right)\)
b) Ta có: \(n_{Fe_2O_3}=\frac{m_{Fe_2O_3}}{M_{Fe_2O_3}}=\frac{80}{160}=0,5\left(mol\right)\)
a) nCO2 = mCO2 : MCO2 = 11 : 18 = 0,6 (mol)
=> VCO2 = nCO2 * 22,4 = 0,6 * 22,4 = 13,44 (lít)
b) nFe2O3 = mFe2O3 : MFe2O3 = 80 : 160 = 0,5 (mol)
VO2=VCO2=0,25.22,4=5,6(lít)
nN2=0,75(mol)
VN2=22,4.0,75=16,8(lít)
nCO2=0,2(mol)
VCO2=0,2.22,4=4,48(lít)
nH2=\(\dfrac{9.10^{23}}{6.10^{23}}=1,5\left(mol\right)\)
VH2=22,4.1,5=33,6(lít)
nCO=0,05(mol)
VCO=22,4.0,05=1,12(lít)
mH2SO4=0.5✖ (2+32+64)=19.6g
mNaOH=0.25✖ (23+16+1)=10g
nSO2=(9✖ 1023)/(6✖ 1023)=1.5 mol
mSO2=1.5✖ (32+32)=96g
a.mH2SO4=0,5.98=49(g)
b) mNaOH=0,25.40=10(g)
c)nSO2=\(\dfrac{9.10^{23}}{6.10^{23}}=1,5\)(mol)
mSO2=1,5.64=96(g)
\(a,m_{O_2}=n.M=0,2.32=6,4\left(g\right)\)
\(V_{O_2}=22,4.n=22,4.0,2=4,48\left(l\right)\)
\(b,m_{N_2O_5}=n.M=0,25.\left(2.14+16.5\right)=27\left(g\right)\)
\(V_{N_2O_5}=22,4.n=22,4.0,25=5,6\left(l\right)\)
\(c,m_{SO_2}=16\left(g\right)\Rightarrow n_{SO_2}=\dfrac{m}{M}=\dfrac{16}{64}=0,25\left(mol\right)\)
\(V_{SO_2}=22,4.0,25=5,69\left(l\right)\)
\(d,n_{H_2}=\dfrac{6.10^{23}}{9.10^{23}}=0,67\left(mol\right)\Rightarrow m_{H_2}=n.M=0,67.2=1,34\left(g\right)\)\(V_{H_2}=22,4.n=22,4.0,67=15,008\left(l\right)\)