Question

- A 300g sample of CaCO3 was heated until 10 L of CO2 was collected
at 50°C and 742 torr. What percentage of the CaCO, had
decomposed? (Atomic weights (g/mol): C=12, 0=16, Ca=40)
A. 6.84%
B. 9.10%
C. 12.3%
D. 15.8%

Answer 1

Answer:

C.12.3%. you need to use pv=nRT (ideal gas law)