energy transformations occur as energy changes from one form to another. as these transformations occur, which of the following happens?
a. heat is given off
b. pressure increases
c. mass is combusted
d. pressure decreases

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.