During a chemical reaction, calcium carbonate (CaCO3) breaks down to form calcium oxide (Cao) and carbon
dioxide (CO2).
Which equation represents this chemical reaction?
O A. CaO + CO2- CaCO3
B. CaCO3 + CaO + CO2
C. CaCO3 + CaO + CO2
D. CaCO3 + CO2 + Cao

Acompound has a molar mass of 92.02 grams/mole, and its percent composition is 30.4% nitrogen (n) and 69.6% oxygen (o). what is its molecular formula? a. n2o4 b. no2 c. n2o d. n4o2

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol