Calculate the amount of heat, in calories, that must be added to warm 67.0 g of brick from 19.9 °C to 54.2 °C brick is 0.20

How is the composition of a meteorite relevant to finding out the composition of earth's core?

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

Why is the structure of molecule important to its function?