Why might the percent yield of copper produced be less than 100% of the expected amount?

[ ] There are impurities in the substances.
[ ] The reaction might not have gone to completion.
[ ] The amount of one of the reactants might be measured incorrectly.

(you can pick multiple)

Gymnast always perform on padded mats. how does the mats protect the gymnast

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.

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?