20,000 J of heat energy is released through the burning of methane. One fourth of that energy is converted to light while the rest is converted to heat. How much heat energy is
produced?

Select the correct answer. given: 2libr + ba → babr2 + 2li in this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced? a. 1.18 mol b. 2.37 mol c. 4.73 mol d. 16.4 mol e. 32.9 mol

Which compound contain an iron with a 3+ charge

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.