A 0.200 mol sample of a mixture of N 2 and CO 2 with a total pressure of 845 torr was exposed to an excess of solid CaO, which reacts with CO 2 according to the equation CaO ( s ) + CO 2 ( g ) → CaCO 3 ( s ) After the reaction was complete, the pressure of the gas had dropped to 322 torr. How many moles of CO 2 were in the original mixture? (Assume no change in volume or temperature.)
A 0.200 mol sample of a mixture of N 2 and CO 2 with a total pressure of 845 torr was exposed to an excess of solid CaO, which reacts with CO 2 according to the equation CaO ( s ) + CO 2 ( g ) → CaCO 3 ( s ) After the reaction was complete, the pressure of the gas had dropped to 322 torr. How many moles of CO 2 were in the original mixture? (Assume no change in volume or temperature.)
A 0.200 mol sample of a mixture of
N
2
and
CO
2
with a total pressure of 845 torr was exposed to an excess of solid CaO, which reacts with
CO
2
according to the equation
CaO
(
s
)
+ CO
2
(
g
)
→
CaCO
3
(
s
)
After the reaction was complete, the pressure of the gas had dropped to 322 torr. How many moles of
CO
2
were in the original mixture? (Assume no change in volume or temperature.)
In the solid state, oxalic acid occurs as
a dihydrate with the formula H2C2O4
C+2H2O. Use this formula to
calculate the formula weight of oxalic
acid. Use the calculated formula
weight and the number of moles
(0.00504mol)
of oxalic acid in each titrated
unknown sample recorded in Table
6.4 to calculate the number of grams
of pure oxalic acid dihydrate
contained in each titrated unknown
sample.
1.
Consider a pair of elements with 2p and 4p valence orbitals (e.g., N and Se). Draw their
(2p and 4p AO's) radial probability plots, and sketch their angular profiles. Then, consider these
orbitals from the two atoms forming a homonuclear л-bond. Which element would have a
stronger bond, and why?
(4 points)
Write the reaction and show the mechanism of the reaction. Include the mechanism
for formation of the NO2+
2. Explain, using resonance structures, why the meta isomer is formed. Draw possible
resonance structures for ortho, meta and para.
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