If a weak acid is 25% deprotonated at ph 4, what is the pka? if a weak acid is 25% deprotonated at ph 4, what is the pka?

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

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.

What is the mass of 4 molecules of co2