What is the mass of 0.28 mol of iron

What must happen before a body cell can begin mitotic cell division

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.

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same