Write the molecular formula to represent ten molecules of hydrogen peroxide (It has 2 hydrogen
atoms and 2 oxygen atoms).

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

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.

What is the value of the standard enthalpy of formation of an element in its most stable form?