A solid substance is placed in a container. When enough is added to the substance, the solid reaches its point and becomes a liquid. Group of answer choices atter; melting

matter; freezing

heat; freezing

heat; melting

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.