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\(a,M_A=22.M_{H_2}=22.2=44(g/mol)\\ b,n_A=\dfrac{6,1975}{24,79}=0,25(mol)\\ \Rightarrow m_A=0,25.44=11(g)\)
- HCl:
\(AgNO_3+HCl\rightarrow AgCl\downarrow+HNO_3\\ Na_2CO_3+2HCl\rightarrow2NaCl+CO_2\uparrow+H_2O\\ Ba\left(NO_3\right)_2+Na_2CO_3\rightarrow BaCO_3\downarrow+2NaNO_3\\ KHSO_3+HCl\rightarrow KCl+SO_2\uparrow+H_2O\\ MgCO_3+2HCl\rightarrow MgCl_2+CO_2\uparrow+H_2O\\ Ba\left(OH\right)_2+2HCl\rightarrow BaCl_2+2H_2O\\ K_2SO_3+2HCl\rightarrow2KCl+CO_2\uparrow+H_2O\\ 2HCl+Ba\left(HCO_3\right)_2\rightarrow BaCl_2+2H_2O+2CO_2\uparrow\)
- H2SO4:
\(2AgNO_3+H_2SO_4\rightarrow Ag_2SO_4\downarrow+2HNO_3\\ Na_2CO_3+H_2SO_4\rightarrow Na_2SO_4+CO_2\uparrow+H_2O\\ Ba\left(NO_3\right)_2+H_2SO_4\rightarrow BaSO_4\downarrow+2HNO_3\\ 2KCl+H_2SO_4\rightarrow K_2SO_4+2HCl\uparrow\\ CaSO_3+H_2SO_4\rightarrow CaSO_4\downarrow+SO_2\uparrow+H_2O\\ BaCl_2+H_2SO_4\rightarrow BaSO_4\downarrow+2HCl\\ Pb\left(NO_3\right)_2+H_2SO_4\rightarrow PbSO_4\downarrow+2HNO_3\)
\(H_2SO_4+MgCO_3\rightarrow MgSO_4+CO_2\uparrow+H_2O\\ H_2SO_4+Ba\left(OH\right)_2\rightarrow BaSO_4\downarrow+2H_2O\\ K_2SO_3+H_2SO_4\rightarrow K_2SO_4+SO_2\uparrow+H_2O\)
\(n_{Cl_2}=\dfrac{N}{A}=\dfrac{1,5.10^{23}}{6.10^{23}}=0,25\left(mol\right)\\ m_{Cl_2}=0,25.71=17,75\left(g\right)\\ V_{Cl_2}=0,25.22,4=5,6\left(l\right)\)
Gọi CTHH là \(S_xO_y\)
ta có M S : M O = \(\dfrac{32x}{16y}=\dfrac{2}{3}\)
=> \(\dfrac{x}{y}=\dfrac{1}{3}\)
vậy CTHH là \(SO_3\)
\(a.M_A=32\cdot2=64\left(\dfrac{g}{mol}\right)\)
\(b.\)
\(n_A=\dfrac{5.6}{22.4}=0.25\left(mol\right)\)
\(m_A=0.25\cdot64=16\left(g\right)\)
a, Ta có: \(M_A=32.2=64\left(g/mol\right)\)
b, Có: \(n_A=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
\(\Rightarrow m_A=0,25.64=16\left(g\right)\)
Bạn tham khảo nhé!
\(M_{KCl} = 39 + 35,5 = 74,5(đvC)\\ M_{MgO} = 24 + 16 = 40(đvC)\\ M_{Ba(OH)_2} = 137 + (16 + 1).2 = 171(đvC)\\ M_{Pb(NO_3)_2} = 207 + (14 + 16.3).2 = 331(đvC)\)