Chromium reacts with oxygen according to the equation: 4Cr + 3O2 à 2Cr2O3. Determine the moles of Cr that react with 21.53 moles of O2 .

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Light waves can move through , but they travel fastest when they move through a(n) .