Ancient Romans built often out of bricks and mortar. A key ingredient in their m

Question

Ancient Romans built often out of bricks and mortar. A key ingredient in their mortar was quicklime (calcium which they produced by roasting limestone (calcium carbonate). Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3) Into solid calcium oxide and gaseous carbon dioxide. Suppose 19.0 L of carbon dioxide gas are produced by this reaction, at a temperature of 290.0 degree C and pressure of exactly 1 atm. Calculate the mass of calcium carbonate that must have reacted. Be sure your answer has the correct number of significant digits.

Explanation / Answer

1.

CaCO3(s) --> CaO(s) + CO2(g)

2.

PV = nRT

n = PV/(RT)

n = 1*19/(0.082*(290+273)) = 0.4115

mass = mol*MW = 0.4115*100 = 41.15 g of CaCO3

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.