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66 Show a numerical
setup for calculating the number
of moles of oxygen gas required
for the average person per day.
The gram-formula mass of O2(g)
is 32 g/mol. [1]
67 State the
change in oxidation number for
oxygen during the electrolysis
reaction represented by the
equation. [1]
68 Determine the number of
moles of oxygen vented into the
cabin when 120 moles of water
undergoes electrolysis. [1]
69 Determine the
percent composition by mass of
hydrogen in water. [1]
| Answer--> 11%
==>2/18 x100% |
70 Balance the
equation for the reaction
between LiOH and CO2
in your answer booklet, using
the smallest
whole-number coefficients. [1]
| Answer-->
__2_LiOH
+_1_CO2-->_1_Li2CO3
+_1_H2O
(1
is not required, zeros
are incorrect)
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