View the step-by-step solution to: When formic acid is heated, it decomposes to hydrogen and carbon

When formic acid is heated, it decompose...
This question was answered on Jan 31, 2011. View the Answer
When formic acid is heated, it decomposes to hydrogen and carbon dioxide in a first-order decay:

HCOOH(g) →CO2(g) + H2 (g)

The rate of reaction is monitored by measuring the total pressure in the reaction container.

Time (s) . . . P (torr)
0 . . . . . . . . . 220
50 . . . . . . . . 324
100 . . . . . . . 379
150 . . . . . . . 408
200 . . . . . . . 423
250 . . . . . . . 431
300 . . . . . . . 435

At the start of the reaction (time = 0), only formic acid is present. What is the formic acid pressure (in torr) when the total pressure is 356? Hint: use Dalton's law of partial pressure and the reaction stoichiometry.
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