What is the change in enthalpy when 26.0 g of Cr(s) is oxidized at 25 °C and 1 atm? The enthalpy of formation of chromium (III) oxide is ΔH =−1135 kJ/mol. 4 Cr(s) + 3 O2→ 2 Cr2O3

Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.

Which of the following is a way carbon enters the atmosphere volcanic activity photosynthesis deposition of settlement burial of biomass hep hurrryy