Which of the following is a product formed when H2SO4 decomposes?
H2,
SO4,
H2S,
H2O

An observation that requires measurement is called quantitative observable or qualitative

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.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro