CH₄ + 2O₂ → CO₂ + 2H₂O If 20 moles of methane are available, how many moles of methane (CH₄) will burn?

Melting 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.

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

What does the symbol (–hfus) indicate in a phase change?