225. In the thermal decomposition of a sample of sodium hydrogen carbonate, after 10 minutes, 4.2 grams of it remain and 0.2 mol of water has formed. The rate of decomposition of sodium hydrogen carbonate is equal to the average rate, and at this same average rate, how many moles per minute does the other second reaction complete? $(H = 1,\ C = 12,\ O = 16,\ Na = 23\ \text{g.mol}^{-1})$ (1) $75.4 \times 10^{-2}$ (2) $75.2 \times 10^{-2}$ (3) $60.2 \times 10^{-2}$ (4) $60.4 \times 10^{-2}$
\textbf{225.} In the thermal decomposition of a sample of sodium hydrogen carbonate, after 10 minutes, 4.2 grams of it remain and 0.2 mol of water has formed. The rate of decomposition of sodium hydrogen carbonate is equal to the average rate, and at this same average rate, how many moles per minute does the other second reaction complete?
$(H = 1,\ C = 12,\ O = 16,\ Na = 23\ \text{g.mol}^{-1})$
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(1) $75.4 \times 10^{-2}$ \quad\quad\quad\quad\quad\quad\quad\quad (2) $75.2 \times 10^{-2}$
(3) $60.2 \times 10^{-2}$ \quad\quad\quad\quad\quad\quad\quad\quad (4) $60.4 \times 10^{-2}$
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