Give a description or location were you can observe weathering for the following things: Flakes or brick
Cracks in rocks
Lichen growing on rocks
Roots or plants growth making cracks in concrete
Worn away statues
Exposed rocks
Rust on rocks
and an example or weathering either mechanical or chemical (make sure to list which on it is) and the description it

State two physical properties of ionic compound

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.