1)
a)
\({n_{{O_2}}} = \frac{{1,12}}{{22,4}} = 0,05{\text{ mol}}\)
\( \to {m_{{O_2}}} = 0,05.32 = 1,6{\text{ gam}}\)
Số phân tử \( = {0,05.6,023.10^{23}} = {3,0115.10^{22}}\) (phân tử)
b)
\({n_{S{O_2}}} = \frac{{2,24}}{{22,4}} = 0,1{\text{ mol}}\)
\( \to {m_{S{O_2}}} = 0,1.64 = 6,4{\text{ gam}}\)
Số phân tử \( = {0,1.6,023.10^{23}} = {6,023.10^{22}}\) (phân tử)
c)
\({n_{{H_2}S}} = \frac{{3,36}}{{22,4}} = 0,15{\text{ mol}}\)
\( \to {m_{{H_2}S}} = 0,15.34 = 5,1{\text{ gam}}\)
Số phân tử \( = {0,15.6,023.10^{23}} = {9,0345.10^{22}}\) (phân tử)
d)
\({n_{{C_4}{H_{10}}}} = \frac{{4,48}}{{22,4}} = 0,2{\text{ mol}}\)
\( \to {m_{{C_4}{H_{10}}}} = 0,2.58 = 11,6{\text{ gam}}\)
Số phân tử \( = {0,2.6,023.10^{23}} = {12,046.10^{22}}\) (phân tử)
2)
a)
\({n_{S{O_3}}} = \frac{{16}}{{80}} = 0,2{\text{ mol}}\)
Số phân tử \( = {0,2.6,023.10^{23}} = {12,046.10^{22}}\) (phân tử)
b)
\({n_{NaOH}} = \frac{8}{{40}} = 0,2{\text{ mol}}\)
Số phân tử \( = {0,2.6,023.10^{23}} = {12,046.10^{22}}\) (phân tử)
c)
\({n_{F{e_2}{{(S{O_4})}_3}}} = \frac{{16}}{{56.2 + 96.3}} = 0,04{\text{ mol}}\)
Số phân tử \( = {0,04.6,023.10^{23}} = {2,4092.10^{22}}\) (phân tử)
d)
\({n_{A{l_2}{{(S{O_4})}_3}}} = \frac{{34,2}}{{27.2 + 96.3}} = 0,1{\text{ mol}}\)
Số phân tử \( = {0,1.6,023.10^{23}} = {6,023.10^{22}}\) (phân tử)
3)
a)
\({n_{C{O_2}}} = \frac{{{{0,06.10}^{23}}}}{{{{6,023.10}^{23}}}} \approx 0,01{\text{ mol}}\)
\( \to {m_{C{O_2}}} = 0,01.44 = 0,44{\text{ gam}}\)
\({V_{C{O_2}}} = 0,01.22,4 = 0,224{\text{ lít}}\)
b)
\({n_{{H_2}S}} = \frac{{{{3,6.10}^{23}}}}{{{{6,023.10}^{23}}}} \approx 0,6{\text{ mol}}\)
\( \to {m_{{H_2}S}} = 0,6.34 = 20,4{\text{ gam}}\)
\({V_{{H_2}S}} = 0,6.22,4 = 13,44{\text{ lít}}\)
c)
\({n_{{H_2}S}} = \frac{{{{1,8.10}^{23}}}}{{{{6,023.10}^{23}}}} \approx 0,3{\text{ mol}}\)
\( \to {m_{{C_3}{H_8}}} = 0,3.44 = 13,2{\text{ gam}}\)
\( \to {V_{{C_3}{H_8}}} = 0,3.22,4 = 6,72{\text{ lít}}\)
4)
a)
\({m_{{C_3}{H_8}}} = 0,015.44 = 0,66{\text{ gam}}\)
\({V_{{C_3}{H_8}}} = 0,015.22,4 = 0,336{\text{ lít}}\)
Số phân tử \( = {0,015.6,023.10^{23}} = {9,0345.10^{21}}\) (phân tử)
b)
\({m_{{C_2}{H_4}}} = 0,025.28 = 0,7{\text{ gam}}\)
\({V_{{C_2}{H_4}}} = 0,025.22,4 = 0,56{\text{ lít}}\)
Số phân tử \( = {0,025.6,023.10^{23}} = {1,50575.10^{22}}\) (phân tử)
c)
\({m_{{C_2}{H_2}}} = 0,045.26 = 1,17{\text{ gam}}\)
\({V_{{C_2}{H_4}}} = 0,045.22,4 = 1,008{\text{ lít}}\)
Số phân tử \( = {0,045.6,023.10^{23}} = {2,71035.10^{22}}\) (phân tử)
