Which is not part of the first law of thermodynamics? a. energy cannot be created or destroyed. b. the total amount of energy in the universe is constant. c. energy can change forms. d. the universe is always slowly gaining energy

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

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.

Avariable that is not being directly tested during an experiment should be